v3.26.1
Unaudited Consolidated Schedule of Investments - Schedule Of Investments (Parenthetical) - USD ($)
$ in Thousands
 6 Months Ended 12 Months Ended
Jun. 30, 2026
Dec. 31, 2025
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance $ 2,398,524  
Fair value at ending balance $ 2,458,590 $ 2,398,524
Jocassee Partners LLC    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ownership percent 9.10% [1],[2],[3] 9.10% [4],[5],[6],[7]
Sierra Senior Loan Strategy JV I LLC    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ownership percent 89.01% [1],[2],[3],[8] 89.01% [4],[6],[7],[9]
Thompson Rivers LLC    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ownership percent 16.00% [1],[2],[8] 16.00% [4],[6],[10]
Waccamaw River, LLC    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ownership percent 20.00% [1],[2],[3],[8] 20.00% [4],[6],[7]
Investment, Identifier [Axis]: A.T. Holdings II LTD | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[11],[12] $ 7,546  
Fair value at ending balance $ 7,459 [3],[13],[14] $ 7,546 [7],[11],[12]
Investment, interest rate, paid in kind 12.40% [3],[13],[14] 7.60% [7],[11],[12]
Interest rate, cash 1.90% [3],[13],[14] 6.70% [7],[11],[12]
Investment, Identifier [Axis]: AD Bidco, Inc. | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[12],[15],[16] $ 13,120  
Fair value at ending balance [5],[12],[15],[16]   $ 13,120
Basis spread on variable rate [5],[12],[15],[16]   5.25%
Interest rate, cash [5],[12],[15],[16]   9.00%
Investment, Identifier [Axis]: AD Bidco, Inc. | Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[12],[15],[16] 0  
Fair value at ending balance [5],[12],[15],[16]   $ 0
Basis spread on variable rate [5],[12],[15],[16]   5.25%
Interest rate, cash [5],[12],[15],[16]   9.00%
Investment, Identifier [Axis]: AIT Worldwide Logistics Holdings, Inc. | Partnership Units    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [10],[12] 785  
Fair value at ending balance [10],[12]   $ 785
Investment owned, balance (in shares) [10],[12]   348.68
Investment, Identifier [Axis]: AMMC CLO 22, Limited Series 2018-22A | Subordinated Structured Notes    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[9],[10],[12] 0  
Fair value at ending balance [7],[9],[10],[12]   $ 0
Investment, Identifier [Axis]: AMP Purchaser, LLC | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [14],[17],[18] $ 5,706  
Basis spread on variable rate [14],[17],[18] 4.50%  
Interest rate, cash [14],[17],[18] 8.20%  
Investment, Identifier [Axis]: AMP Purchaser, LLC | Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [14],[17],[18],[19] $ (4)  
Basis spread on variable rate [14],[17],[18],[19] 4.50%  
Interest rate, cash [14],[17],[18],[19] 8.20%  
Investment, Identifier [Axis]: APC1 Holding | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[12],[16],[20] $ 2,701  
Fair value at ending balance $ 2,614 [3],[14],[18],[21] $ 2,701 [7],[12],[16],[20]
Basis spread on variable rate 5.50% [3],[14],[18],[21] 5.40% [7],[12],[16],[20]
Interest rate, cash 7.80% [3],[14],[18],[21] 7.40% [7],[12],[16],[20]
Investment, Identifier [Axis]: ARC Interco Purchaser, LLC | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[12],[15],[16] $ 2,974  
Fair value at ending balance [5],[12],[15],[16]   $ 2,974
Basis spread on variable rate [5],[12],[15],[16]   4.75%
Interest rate, cash [5],[12],[15],[16]   8.40%
Investment, Identifier [Axis]: ARC Interco Purchaser, LLC | First Lien Senior Secured Term Loan 1    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [14],[17],[18],[19] $ 4,691  
Basis spread on variable rate [14],[17],[18],[19] 5.00%  
Interest rate, cash [14],[17],[18],[19] 8.70%  
Investment, Identifier [Axis]: ARC Interco Purchaser, LLC | First Lien Senior Secured Term Loan 2    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [14],[18],[22] $ 608  
Basis spread on variable rate [14],[18],[22] 5.25%  
Interest rate, cash [14],[18],[22] 8.90%  
Investment, Identifier [Axis]: ARC Interco Purchaser, LLC | LLC Units    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [10],[12] $ 122  
Fair value at ending balance $ 129 [8],[14] $ 122 [10],[12]
Investment owned, balance (in shares) 121,550 [8],[14] 121,550 [10],[12]
Investment, Identifier [Axis]: ARC Interco Purchaser, LLC | Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[12],[15],[16] $ (7)  
Fair value at ending balance $ (16) [14],[17],[18],[19] $ (7) [5],[12],[15],[16]
Basis spread on variable rate 5.00% [14],[17],[18],[19] 4.75% [5],[12],[15],[16]
Interest rate, cash 8.70% [14],[17],[18],[19] 8.40% [5],[12],[15],[16]
Investment, Identifier [Axis]: ASC Communications, LLC | Class A Units    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [12] $ 880  
Fair value at ending balance $ 971 [14] $ 880 [12]
Investment owned, balance (in shares) 25,718.2 [14] 25,718.2 [12]
Investment, Identifier [Axis]: ASC Communications, LLC | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [12],[16],[23] $ 5,171  
Fair value at ending balance $ 4,691 [14],[18],[22] $ 5,171 [12],[16],[23]
Basis spread on variable rate 4.50% [14],[18],[22] 4.50% [12],[16],[23]
Interest rate, cash 8.10% [14],[18],[22] 8.20% [12],[16],[23]
Investment, Identifier [Axis]: ASC Communications, LLC | Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[12],[16],[23] $ (7)  
Fair value at ending balance $ (6) [14],[18],[19],[22] $ (7) [5],[12],[16],[23]
Basis spread on variable rate 4.50% [14],[18],[19],[22] 4.50% [5],[12],[16],[23]
Interest rate, cash 8.10% [14],[18],[19],[22] 8.20% [5],[12],[16],[23]
Investment, Identifier [Axis]: ATL II MRO Holdings Inc. | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [12],[15],[16] $ 18,939  
Fair value at ending balance $ 18,829 [14],[17],[18] $ 18,939 [12],[15],[16]
Basis spread on variable rate 4.75% [14],[17],[18] 5.25% [12],[15],[16]
Interest rate, cash 8.20% [14],[17],[18] 9.20% [12],[15],[16]
Investment, Identifier [Axis]: ATL II MRO Holdings Inc. | Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[12],[15],[16] $ (31)  
Fair value at ending balance $ (33) [14],[17],[18],[19] $ (31) [5],[12],[15],[16]
Basis spread on variable rate 4.75% [14],[17],[18],[19] 5.25% [5],[12],[15],[16]
Interest rate, cash 8.20% [14],[17],[18],[19] 9.20% [5],[12],[15],[16]
Investment, Identifier [Axis]: AWP Group Holdings, Inc. | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [14],[18],[22] $ 8,464  
Basis spread on variable rate [14],[18],[22] 5.25%  
Investment, interest rate, paid in kind [14],[18],[22] 3.30%  
Interest rate, cash [14],[18],[22] 5.60%  
Investment, Identifier [Axis]: AWP Group Holdings, Inc. | Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [14],[18],[19],[22] $ 384  
Basis spread on variable rate [14],[18],[19],[22] 5.25%  
Investment, interest rate, paid in kind [14],[18],[19],[22] 3.30%  
Interest rate, cash [14],[18],[19],[22] 5.60%  
Investment, Identifier [Axis]: Accelerant Holdings | Common Stock    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [10] $ 4,110  
Fair value at ending balance $ 2,946 [8] $ 4,110 [10]
Investment owned, balance (in shares) 279,230 [8] 279,230 [10]
Investment, Identifier [Axis]: Accelevation LLC | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[12],[16],[23] $ 1,221  
Fair value at ending balance $ 6,065 [14],[18],[19],[22] $ 1,221 [5],[12],[16],[23]
Basis spread on variable rate 5.00% [14],[18],[19],[22] 4.50% [5],[12],[16],[23]
Interest rate, cash 8.60% [14],[18],[19],[22] 8.40% [5],[12],[16],[23]
Investment, Identifier [Axis]: Accelevation LLC | Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[12],[16],[23] $ 159  
Fair value at ending balance $ (15) [14],[18],[19],[22] $ 159 [5],[12],[16],[23]
Basis spread on variable rate 5.00% [14],[18],[19],[22] 4.50% [5],[12],[16],[23]
Interest rate, cash 8.60% [14],[18],[19],[22] 8.40% [5],[12],[16],[23]
Investment, Identifier [Axis]: Acclime Holdings HK Limited | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[12],[15],[16] $ 7,266  
Fair value at ending balance [7],[12],[15],[16]   $ 7,266
Basis spread on variable rate [7],[12],[15],[16]   6.23%
Interest rate, cash [7],[12],[15],[16]   10.30%
Investment, Identifier [Axis]: Acclime Holdings HK Limited | Subordinated Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[12] 234  
Fair value at ending balance $ 269 [3],[14] $ 234 [7],[12]
Interest rate, cash 15.00% [3],[14] 15.00% [7],[12]
Investment, Identifier [Axis]: Accurus Aerospace Corporation | Common Stock    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [10],[12] $ 149  
Fair value at ending balance $ 381 [8],[14] $ 149 [10],[12]
Investment owned, balance (in shares) 437,623.3 [8],[14] 437,623.3 [10],[12]
Investment, Identifier [Axis]: Accurus Aerospace Corporation | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [12],[15],[16] $ 12,951  
Fair value at ending balance $ 12,967 [14],[17],[18] $ 12,951 [12],[15],[16]
Basis spread on variable rate 4.75% [14],[17],[18] 4.75% [12],[15],[16]
Interest rate, cash 8.60% [14],[17],[18] 8.80% [12],[15],[16]
Investment, Identifier [Axis]: Accurus Aerospace Corporation | LLC Units    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [10],[12] $ 6  
Fair value at ending balance $ 16 [8],[14] $ 6 [10],[12]
Investment owned, balance (in shares) 18,151.3 [8],[14] 18,151.3 [10],[12]
Investment, Identifier [Axis]: Accurus Aerospace Corporation | Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[12],[15],[16] $ 270  
Fair value at ending balance $ 1,494 [14],[17],[18],[19] $ 270 [5],[12],[15],[16]
Basis spread on variable rate 4.75% [14],[17],[18],[19] 4.75% [5],[12],[15],[16]
Interest rate, cash 8.60% [14],[17],[18],[19] 8.80% [5],[12],[15],[16]
Investment, Identifier [Axis]: Acogroup | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[12],[16],[20],[24] $ 3,349  
Fair value at ending balance $ 1,566 [3],[14],[18],[21],[25] $ 3,349 [7],[12],[16],[20],[24]
Basis spread on variable rate 2.90% [3],[14],[18],[21],[25] 2.90% [7],[12],[16],[20],[24]
Investment, interest rate, paid in kind 6.40% [3],[14],[18],[21],[25] 6.40% [7],[12],[16],[20],[24]
Investment, Identifier [Axis]: Adhefin International | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[7],[12],[16],[20] $ 2,311  
Fair value at ending balance $ 2,280 [3],[14],[18],[21] $ 2,311 [5],[7],[12],[16],[20]
Basis spread on variable rate 4.98% [3],[14],[18],[21] 5.10% [5],[7],[12],[16],[20]
Interest rate, cash 7.30% [3],[14],[18],[21] 7.10% [5],[7],[12],[16],[20]
Investment, Identifier [Axis]: Advantage Software Company (The), LLC | Class A1 Partnership Units    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [10],[12] $ 379  
Fair value at ending balance $ 238 [8],[14] $ 379 [10],[12]
Investment owned, balance (in shares) 8,717.76 [8],[14] 8,717.76 [10],[12]
Investment, Identifier [Axis]: Advantage Software Company (The), LLC | Class A2 Partnership Units    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [10],[12] $ 98  
Fair value at ending balance $ 61 [8],[14] $ 98 [10],[12]
Investment owned, balance (in shares) 2,248.46 [8],[14] 2,248.46 [10],[12]
Investment, Identifier [Axis]: Advantage Software Company (The), LLC | Class B1 Partnership Units    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [10],[12] $ 0  
Fair value at ending balance $ 0 [8],[14] $ 0 [10],[12]
Investment owned, balance (in shares) 8,717.76 [8],[14] 8,717.76 [10],[12]
Investment, Identifier [Axis]: Advantage Software Company (The), LLC | Class B2 Partnership Units    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [10],[12] $ 0  
Fair value at ending balance $ 0 [8],[14] $ 0 [10],[12]
Investment owned, balance (in shares) 2,248.46 [8],[14] 2,248.46 [10],[12]
Investment, Identifier [Axis]: Aegros Holdco 2 Ltd | Common Stock    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[10],[12] $ 610  
Fair value at ending balance $ 590 [3],[8],[14] $ 610 [7],[10],[12]
Investment owned, balance (in shares) 889,464 [3],[8],[14] 889,464 [7],[10],[12]
Investment, Identifier [Axis]: Aegros Holdco 2 Ltd | Second Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[12] $ 5,310  
Fair value at ending balance $ 5,493 [3],[14],[18],[26] $ 5,310 [7],[12]
Basis spread on variable rate 8.30% [3],[14],[18],[26] 8.50% [7],[12]
Investment, interest rate, paid in kind 12.00% [3],[14],[18],[26] 13.00% [7],[12]
Investment, Identifier [Axis]: AirX Climate Solutions, Inc. | First Lien Senior Secured Term Loan 1    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [12],[15],[16] $ 3,222  
Fair value at ending balance $ 4,188 [14],[17],[18],[19] $ 3,222 [12],[15],[16]
Basis spread on variable rate 5.00% [14],[17],[18],[19] 5.00% [12],[15],[16]
Interest rate, cash 8.70% [14],[17],[18],[19] 8.80% [12],[15],[16]
Investment, Identifier [Axis]: AirX Climate Solutions, Inc. | First Lien Senior Secured Term Loan 2    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[12],[15],[16] $ 3,249  
Fair value at ending balance $ 3,264 [14],[17],[18] $ 3,249 [5],[12],[15],[16]
Basis spread on variable rate 5.75% [14],[17],[18] 5.75% [5],[12],[15],[16]
Interest rate, cash 9.40% [14],[17],[18] 9.60% [5],[12],[15],[16]
Investment, Identifier [Axis]: AirX Climate Solutions, Inc. | Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[12],[15],[16] $ 0  
Fair value at ending balance $ 155 [14],[17],[18],[19] $ 0 [5],[12],[15],[16]
Basis spread on variable rate 5.75% [14],[17],[18],[19] 5.75% [5],[12],[15],[16]
Interest rate, cash 9.40% [14],[17],[18],[19] 9.60% [5],[12],[15],[16]
Investment, Identifier [Axis]: AlliA Insurance Brokers NV | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[12],[16],[27] $ 5,510  
Fair value at ending balance $ 5,229 [3],[14],[18],[21] $ 5,510 [7],[12],[16],[27]
Basis spread on variable rate 6.25% [3],[14],[18],[21] 7.00% [7],[12],[16],[27]
Interest rate, cash 8.50% [3],[14],[18],[21] 9.10% [7],[12],[16],[27]
Investment, Identifier [Axis]: Amalfi Midco | Class B Common Stock    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[10],[12] $ 2,661  
Fair value at ending balance $ 2,625 [3],[8],[14] $ 2,661 [7],[10],[12]
Investment owned, balance (in shares) 98,906,608 [3],[8],[14] 98,906,608 [7],[10],[12]
Investment, Identifier [Axis]: Amalfi Midco | Second Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[12] $ 361  
Fair value at ending balance $ 384 [3],[14] $ 361 [7],[12]
Interest rate, cash 15.50% [3],[14] 15.50% [7],[12]
Investment, Identifier [Axis]: Amalfi Midco | Subordinated Loan Notes    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[12] $ 6,575  
Fair value at ending balance $ 3,924 [3],[14] $ 6,575 [7],[12]
Investment, interest rate, paid in kind 9.00% [3],[14] 9.00% [7],[12]
Interest rate, cash 2.00% [3],[14] 2.00% [7],[12]
Investment, Identifier [Axis]: Amalfi Midco | Warrants    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[10],[12] $ 1,167  
Fair value at ending balance $ 1,247 [3],[8],[14] $ 1,167 [7],[10],[12]
Investment owned, balance (in shares) 380,385 [3],[8],[14] 380,385 [7],[10],[12]
Investment, Identifier [Axis]: Americo Chemical Products, LLC | Common Stock    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [10],[12] $ 108  
Fair value at ending balance $ 103 [8],[14] $ 108 [10],[12]
Investment owned, balance (in shares) 88,110 [8],[14] 88,110 [10],[12]
Investment, Identifier [Axis]: Americo Chemical Products, LLC | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [12],[16],[23] $ 4,875  
Fair value at ending balance $ 4,773 [14],[18],[22] $ 4,875 [12],[16],[23]
Basis spread on variable rate 5.25% [14],[18],[22] 5.00% [12],[16],[23]
Interest rate, cash 8.90% [14],[18],[22] 8.70% [12],[16],[23]
Investment, Identifier [Axis]: Americo Chemical Products, LLC | Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[12],[16],[23] $ (6)  
Fair value at ending balance $ (5) [14],[18],[19],[22] $ (6) [5],[12],[16],[23]
Basis spread on variable rate 5.25% [14],[18],[19],[22] 5.00% [5],[12],[16],[23]
Interest rate, cash 8.90% [14],[18],[19],[22] 8.70% [5],[12],[16],[23]
Investment, Identifier [Axis]: AnalytiChem Holding GmbH | First Lien Senior Secured Term Loan 1    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[12],[16],[20] $ 6,225  
Fair value at ending balance $ 6,035 [3],[14],[18],[28] $ 6,225 [7],[12],[16],[20]
Basis spread on variable rate 5.58% [3],[14],[18],[28] 5.33% [7],[12],[16],[20]
Interest rate, cash 7.80% [3],[14],[18],[28] 7.30% [7],[12],[16],[20]
Investment, Identifier [Axis]: AnalytiChem Holding GmbH | First Lien Senior Secured Term Loan 2    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[12],[15],[16] $ 1,012  
Fair value at ending balance $ 1,007 [3],[14],[18],[29] $ 1,012 [7],[12],[15],[16]
Basis spread on variable rate 5.58% [3],[14],[18],[29] 5.33% [7],[12],[15],[16]
Interest rate, cash 9.40% [3],[14],[18],[29] 9.70% [7],[12],[15],[16]
Investment, Identifier [Axis]: Apex Bidco Limited | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[12],[16],[30] $ 3,403  
Fair value at ending balance $ 3,381 [3],[14],[18],[26] $ 3,403 [7],[12],[16],[30]
Basis spread on variable rate 6.75% [3],[14],[18],[26] 7.00% [7],[12],[16],[30]
Interest rate, cash 10.60% [3],[14],[18],[26] 10.80% [7],[12],[16],[30]
Investment, Identifier [Axis]: Apex Bidco Limited | Subordinated Senior Unsecured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[12] $ 371  
Fair value at ending balance $ 406 [3],[14] $ 371 [7],[12]
Investment, interest rate, paid in kind 9.00% [3],[14] 9.00% [7],[12]
Investment, Identifier [Axis]: Apidos CLO XXIV, Series 2016-24A | Subordinated Structured Notes    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[9] $ 2,755  
Fair value at ending balance [7],[9]   $ 2,755
Investment, Identifier [Axis]: Application Boot Camp LLC | Common Stock    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [12] 279  
Fair value at ending balance $ 300 [14] $ 279 [12]
Investment owned, balance (in shares) 234,751.8 [14] 234,751.8 [12]
Investment, Identifier [Axis]: Application Boot Camp LLC | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [12],[15],[16] $ 1,201  
Fair value at ending balance $ 1,217 [14],[17],[18] $ 1,201 [12],[15],[16]
Basis spread on variable rate 4.75% [14],[17],[18] 5.00% [12],[15],[16]
Interest rate, cash 8.40% [14],[17],[18] 8.70% [12],[15],[16]
Investment, Identifier [Axis]: Application Boot Camp LLC | Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[12],[15],[16] $ (6)  
Fair value at ending balance $ 0 [14],[17],[18],[19] $ (6) [5],[12],[15],[16]
Basis spread on variable rate 4.75% [14],[17],[18],[19] 5.00% [5],[12],[15],[16]
Interest rate, cash 8.40% [14],[17],[18],[19] 8.70% [5],[12],[15],[16]
Investment, Identifier [Axis]: Application Boot Camp LLC | Subordinated Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [12] $ 82  
Fair value at ending balance $ 83 [14] $ 82 [12]
Interest rate, cash 14.00% [14] 14.00% [12]
Investment, Identifier [Axis]: Aptus 1829. GmbH | Common Stock    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[10],[12] $ 0  
Fair value at ending balance $ 0 [3],[8],[14] $ 0 [7],[10],[12]
Investment owned, balance (in shares) 48 [3],[8],[14] 48 [7],[10],[12]
Investment, Identifier [Axis]: Aptus 1829. GmbH | Preferred Stock    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[10],[12] $ 68  
Fair value at ending balance $ 58 [3],[8],[14] $ 68 [7],[10],[12]
Investment owned, balance (in shares) 13 [3],[8],[14] 13 [7],[10],[12]
Investment, Identifier [Axis]: Apus Bidco Limited | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[12],[16],[31] $ 3,875  
Fair value at ending balance [7],[12],[16],[31]   $ 3,875
Basis spread on variable rate [7],[12],[16],[31]   5.00%
Interest rate, cash [7],[12],[16],[31]   9.20%
Investment, Identifier [Axis]: Arc Education | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[7],[12],[16],[27] 962  
Fair value at ending balance $ 967 [3],[14],[18],[19],[28] $ 962 [5],[7],[12],[16],[27]
Basis spread on variable rate 4.00% [3],[14],[18],[19],[28] 4.00% [5],[7],[12],[16],[27]
Investment, interest rate, paid in kind [3],[14],[18],[19],[28] 2.20%  
Interest rate, cash 6.50% [3],[14],[18],[19],[28] 6.00% [5],[7],[12],[16],[27]
Investment, Identifier [Axis]: Arch Global Precision LLC | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [12],[15],[16] $ 8,376  
Fair value at ending balance $ 8,264 [14],[17],[18] $ 8,376 [12],[15],[16]
Basis spread on variable rate 4.75% [14],[17],[18] 4.75% [12],[15],[16]
Interest rate, cash 8.60% [14],[17],[18] 8.50% [12],[15],[16]
Investment, Identifier [Axis]: Archimede | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[12],[16],[20] $ 6,354  
Fair value at ending balance $ 5,771 [3],[14],[18],[21] $ 6,354 [7],[12],[16],[20]
Basis spread on variable rate 4.00% [3],[14],[18],[21] 7.00% [7],[12],[16],[20]
Interest rate, cash 6.30% [3],[14],[18],[21] 9.00% [7],[12],[16],[20]
Investment, Identifier [Axis]: Argus Bidco Limited | Class B Common Stock    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [3],[8],[14] $ 3  
Investment owned, balance (in shares) [3],[8],[14] 2,527  
Investment, Identifier [Axis]: Argus Bidco Limited | Common Stock    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[10],[12] $ 0  
Fair value at ending balance $ 0 [3],[8],[14] $ 0 [7],[10],[12]
Investment owned, balance (in shares) 464 [3],[8],[14] 464 [7],[10],[12]
Investment, Identifier [Axis]: Argus Bidco Limited | Equity Loan Notes    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[12] $ 27  
Fair value at ending balance $ 18 [3],[14] $ 27 [7],[12]
Investment, interest rate, paid in kind 10.00% [3],[14] 10.00% [7],[12]
Investment owned, balance (in shares) 41,560 [3],[14] 41,560 [7],[12]
Investment, Identifier [Axis]: Argus Bidco Limited | First Lien Senior Secured Term Loan 1    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[12],[16],[31] $ 1,752  
Fair value at ending balance $ 1,376 [3],[14],[18],[32] $ 1,752 [7],[12],[16],[31]
Basis spread on variable rate 6.70% [3],[14],[18],[32] 4.00% [7],[12],[16],[31]
Investment, interest rate, paid in kind [7],[12],[16],[31]   3.20%
Interest rate, cash 10.40% [3],[14],[18],[32] 8.00% [7],[12],[16],[31]
Investment, Identifier [Axis]: Argus Bidco Limited | First Lien Senior Secured Term Loan 2    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[12],[16],[27] $ 2,042  
Fair value at ending balance $ 1,957 [3],[14],[18],[28] $ 2,042 [7],[12],[16],[27]
Basis spread on variable rate 6.70% [3],[14],[18],[28] 4.00% [7],[12],[16],[27]
Investment, interest rate, paid in kind [7],[12],[16],[27]   3.20%
Interest rate, cash 9.20% [3],[14],[18],[28] 6.10% [7],[12],[16],[27]
Investment, Identifier [Axis]: Argus Bidco Limited | First Lien Senior Secured Term Loan 3    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[12],[16],[33] $ 127  
Fair value at ending balance $ 125 [3],[14],[18],[29] $ 127 [7],[12],[16],[33]
Basis spread on variable rate 6.70% [3],[14],[18],[29] 4.00% [7],[12],[16],[33]
Investment, interest rate, paid in kind [7],[12],[16],[33]   3.20%
Interest rate, cash 10.30% [3],[14],[18],[29] 8.10% [7],[12],[16],[33]
Investment, Identifier [Axis]: Argus Bidco Limited | Ordinary Shares    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [3],[8],[14] $ 0  
Investment owned, balance (in shares) [3],[8],[14] 30  
Investment, Identifier [Axis]: Argus Bidco Limited | Preferred Stock    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[12] $ 28  
Fair value at ending balance $ 18 [3],[14] $ 28 [7],[12]
Investment, interest rate, paid in kind 10.00% [3],[14] 10.00% [7],[12]
Investment owned, balance (in shares) 41,560 [3],[14] 41,560 [7],[12]
Investment, Identifier [Axis]: Argus Bidco Limited | Second Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[12] $ 974  
Fair value at ending balance $ 683 [3],[14] $ 974 [7],[12]
Investment, interest rate, paid in kind 10.50% [3],[14] 10.50% [7],[12]
Investment, Identifier [Axis]: Argus Bidco Limited | Subordinated Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [3],[14] $ 15  
Investment owned, balance (in shares) [3],[14] 15,000  
Interest rate, cash [3],[14] 24.00%  
Investment, Identifier [Axis]: Argus Intermediate, LLC | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[12],[15],[16] $ 3,732  
Fair value at ending balance $ 3,807 [14],[17],[18],[19] $ 3,732 [5],[12],[15],[16]
Basis spread on variable rate 4.75% [14],[17],[18],[19] 4.75% [5],[12],[15],[16]
Interest rate, cash 8.40% [14],[17],[18],[19] 8.50% [5],[12],[15],[16]
Investment, Identifier [Axis]: Argus Intermediate, LLC | Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[12],[15],[16] $ 616  
Fair value at ending balance $ 627 [14],[17],[18],[19] $ 616 [5],[12],[15],[16]
Basis spread on variable rate 4.75% [14],[17],[18],[19] 4.75% [5],[12],[15],[16]
Interest rate, cash 8.40% [14],[17],[18],[19] 8.50% [5],[12],[15],[16]
Investment, Identifier [Axis]: Armstrong Transport Group (Pele Buyer, LLC) | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [12],[16],[33] $ 6,407  
Fair value at ending balance [12],[16],[33]   $ 6,407
Basis spread on variable rate [12],[16],[33]   5.00%
Interest rate, cash [12],[16],[33]   8.70%
Investment, Identifier [Axis]: Armstrong Transport Group (Pele Buyer, LLC) | Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[12],[16],[33] (3)  
Fair value at ending balance [5],[12],[16],[33]   $ (3)
Basis spread on variable rate [5],[12],[16],[33]   5.00%
Interest rate, cash [5],[12],[16],[33]   8.70%
Investment, Identifier [Axis]: Armstrong Transport Group, LLC | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [14],[17],[18],[19] $ 7,107  
Basis spread on variable rate [14],[17],[18],[19] 4.75%  
Interest rate, cash [14],[17],[18],[19] 8.40%  
Investment, Identifier [Axis]: Armstrong Transport Group, LLC | Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [14],[17],[18],[19] $ 448  
Basis spread on variable rate [14],[17],[18],[19] 4.75%  
Interest rate, cash [14],[17],[18],[19] 8.40%  
Investment, Identifier [Axis]: Artemis Bidco Limited | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[7],[12],[16],[20] $ 618  
Fair value at ending balance $ 623 [3],[14],[18],[19],[21] $ 618 [5],[7],[12],[16],[20]
Basis spread on variable rate 5.25% [3],[14],[18],[19],[21] 5.00% [5],[7],[12],[16],[20]
Interest rate, cash 7.50% [3],[14],[18],[19],[21] 7.00% [5],[7],[12],[16],[20]
Investment, Identifier [Axis]: Astra Bidco Limited | First Lien Senior Secured Term Loan 1    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[12],[16],[20] $ 449  
Fair value at ending balance $ 437 [3],[14],[18],[21] $ 449 [7],[12],[16],[20]
Basis spread on variable rate 5.00% [3],[14],[18],[21] 5.00% [7],[12],[16],[20]
Interest rate, cash 7.20% [3],[14],[18],[21] 7.10% [7],[12],[16],[20]
Investment, Identifier [Axis]: Astra Bidco Limited | First Lien Senior Secured Term Loan 2    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[12],[16],[31] $ 2,604  
Fair value at ending balance $ 2,569 [3],[14],[18],[32] $ 2,604 [7],[12],[16],[31]
Basis spread on variable rate 5.00% [3],[14],[18],[32] 5.00% [7],[12],[16],[31]
Interest rate, cash 8.70% [3],[14],[18],[32] 8.70% [7],[12],[16],[31]
Investment, Identifier [Axis]: Auxi International | First Lien Senior Secured Term Loan 1    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[12],[16],[20] $ 1,562  
Fair value at ending balance $ 1,559 [3],[14],[18],[21] $ 1,562 [7],[12],[16],[20]
Basis spread on variable rate 6.00% [3],[14],[18],[21] 6.25% [7],[12],[16],[20]
Interest rate, cash 8.30% [3],[14],[18],[21] 8.30% [7],[12],[16],[20]
Investment, Identifier [Axis]: Auxi International | First Lien Senior Secured Term Loan 2    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[12],[16],[30] $ 856  
Fair value at ending balance $ 866 [3],[14],[18],[26] $ 856 [7],[12],[16],[30]
Basis spread on variable rate 6.00% [3],[14],[18],[26] 6.25% [7],[12],[16],[30]
Interest rate, cash 9.70% [3],[14],[18],[26] 9.90% [7],[12],[16],[30]
Investment, Identifier [Axis]: Avance Clinical Bidco Pty Ltd | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[7],[12],[16],[34] $ 1,609  
Fair value at ending balance $ 1,671 [3],[14],[18],[35] $ 1,609 [5],[7],[12],[16],[34]
Basis spread on variable rate 4.50% [3],[14],[18],[35] 4.50% [5],[7],[12],[16],[34]
Interest rate, cash 8.90% [3],[14],[18],[35] 8.20% [5],[7],[12],[16],[34]
Investment, Identifier [Axis]: Azalea Buyer, Inc. | Common Stock    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [10],[12] $ 304  
Fair value at ending balance $ 340 [8],[14] $ 304 [10],[12]
Investment owned, balance (in shares) 192,307.7 [8],[14] 192,307.7 [10],[12]
Investment, Identifier [Axis]: Azalea Buyer, Inc. | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [12],[16],[23] $ 4,738  
Fair value at ending balance $ 4,713 [14],[18],[22] $ 4,738 [12],[16],[23]
Basis spread on variable rate 5.25% [14],[18],[22] 5.25% [12],[16],[23]
Interest rate, cash 9.00% [14],[18],[22] 9.10% [12],[16],[23]
Investment, Identifier [Axis]: Azalea Buyer, Inc. | Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[12],[16],[23] $ 0  
Fair value at ending balance $ 0 [14],[18],[19],[22] $ 0 [5],[12],[16],[23]
Basis spread on variable rate 5.25% [14],[18],[19],[22] 5.25% [5],[12],[16],[23]
Interest rate, cash 9.00% [14],[18],[19],[22] 9.10% [5],[12],[16],[23]
Investment, Identifier [Axis]: Azalea Buyer, Inc. | Subordinated Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [12] $ 2,042  
Fair value at ending balance $ 2,165 [14] $ 2,042 [12]
Investment, interest rate, paid in kind 12.00% [14] 12.00% [12]
Investment, Identifier [Axis]: BCTS Parent, LLC | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [3],[14],[18],[19],[36] $ 1,215  
Basis spread on variable rate [3],[14],[18],[19],[36] 4.75%  
Interest rate, cash [3],[14],[18],[19],[36] 7.30%  
Investment, Identifier [Axis]: BCTS Parent, LLC | Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [3],[14],[18],[19],[36] $ 245  
Basis spread on variable rate [3],[14],[18],[19],[36] 4.75%  
Interest rate, cash [3],[14],[18],[19],[36] 7.30%  
Investment, Identifier [Axis]: BKF Buyer, Inc. | Common Stock    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [10],[12] $ 1,145  
Fair value at ending balance $ 1,205 [8],[14] $ 1,145 [10],[12]
Investment owned, balance (in shares) 1,004,467 [8],[14] 1,004,467 [10],[12]
Investment, Identifier [Axis]: BKF Buyer, Inc. | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [12],[16],[23] $ 7,988  
Fair value at ending balance $ 4,120 [14],[18],[19],[22] $ 7,988 [12],[16],[23]
Basis spread on variable rate 4.50% [14],[18],[19],[22] 5.00% [12],[16],[23]
Interest rate, cash 8.10% [14],[18],[19],[22] 8.70% [12],[16],[23]
Investment, Identifier [Axis]: BKF Buyer, Inc. | Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[12],[16],[23] $ (33)  
Fair value at ending balance $ (40) [14],[18],[19],[22] $ (33) [5],[12],[16],[23]
Basis spread on variable rate 4.50% [14],[18],[19],[22] 5.00% [5],[12],[16],[23]
Interest rate, cash 8.10% [14],[18],[19],[22] 8.70% [5],[12],[16],[23]
Investment, Identifier [Axis]: BLI Buyer, Inc. | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[12],[15],[16] $ 2,547  
Fair value at ending balance $ 2,548 [14],[17],[18],[19] $ 2,547 [5],[12],[15],[16]
Basis spread on variable rate 5.00% [14],[17],[18],[19] 5.00% [5],[12],[15],[16]
Interest rate, cash 8.70% [14],[17],[18],[19] 8.80% [5],[12],[15],[16]
Investment, Identifier [Axis]: BLI Buyer, Inc. | Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[12],[15],[16] $ (6)  
Fair value at ending balance $ 138 [14],[17],[18],[19] $ (6) [5],[12],[15],[16]
Basis spread on variable rate 5.00% [14],[17],[18],[19] 5.00% [5],[12],[15],[16]
Interest rate, cash 8.70% [14],[17],[18],[19] 8.80% [5],[12],[15],[16]
Investment, Identifier [Axis]: BNI Global, LLC | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [12],[16],[37] $ 10,598  
Fair value at ending balance $ 10,267 [14],[18],[38] $ 10,598 [12],[16],[37]
Basis spread on variable rate 5.50% [14],[18],[38] 5.50% [12],[16],[37]
Interest rate, cash 7.70% [14],[18],[38] 7.40% [12],[16],[37]
Investment, Identifier [Axis]: BPG Holdings IV Corp | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [12],[15],[16] $ 11,347  
Fair value at ending balance $ 11,575 [14],[17],[18] $ 11,347 [12],[15],[16]
Basis spread on variable rate 7.85% [14],[17],[18] 2.00% [12],[15],[16]
Investment, interest rate, paid in kind 11.60% [14],[17],[18] 5.00% [12],[15],[16]
Interest rate, cash [12],[15],[16]   5.60%
Investment, Identifier [Axis]: Balaena Maritime (UK) Limited | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [3],[14],[18],[26] $ 19,513  
Basis spread on variable rate [3],[14],[18],[26] 12.00%  
Interest rate, cash [3],[14],[18],[26] 15.70%  
Investment, Identifier [Axis]: Balaena Maritime (UK) Limited | Warrants    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [3],[8],[14] $ 0  
Investment owned, balance (in shares) [3],[8],[14] 209,427.5  
Investment, Identifier [Axis]: Bariacum S.A. | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [3],[14],[18],[21],[25] $ 0  
Basis spread on variable rate [3],[14],[18],[21],[25] 4.00%  
Investment, interest rate, paid in kind [3],[14],[18],[21],[25] 6.00%  
Investment, Identifier [Axis]: Bariacum S.A. | First Lien Senior Secured Term Loan 1    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[12],[16],[20],[24] $ 655  
Fair value at ending balance [7],[12],[16],[20],[24]   $ 655
Basis spread on variable rate [7],[12],[16],[20],[24]   4.00%
Investment, interest rate, paid in kind [7],[12],[16],[20],[24]   6.00%
Investment, Identifier [Axis]: Bariacum S.A. | First Lien Senior Secured Term Loan 2    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[12],[16],[20] 47  
Fair value at ending balance [7],[12],[16],[20]   $ 47
Basis spread on variable rate [7],[12],[16],[20]   9.50%
Interest rate, cash [7],[12],[16],[20]   11.50%
Investment, Identifier [Axis]: Bariacum S.A. | First Lien Senior Secured Term Loan 3    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[12],[16],[20] 376  
Fair value at ending balance [7],[12],[16],[20]   $ 376
Basis spread on variable rate [7],[12],[16],[20]   9.50%
Investment, interest rate, paid in kind [7],[12],[16],[20]   11.50%
Investment, Identifier [Axis]: Basin Innovation Group, LLC | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[12],[16],[33] 7,665  
Fair value at ending balance $ 7,952 [14],[18],[22] $ 7,665 [5],[12],[16],[33]
Basis spread on variable rate 4.75% [14],[18],[22] 4.75% [5],[12],[16],[33]
Interest rate, cash 8.40% [14],[18],[22] 8.50% [5],[12],[16],[33]
Investment, Identifier [Axis]: Basin Innovation Group, LLC | Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[12],[16],[33] $ 0  
Fair value at ending balance $ (17) [14],[18],[19],[22] $ 0 [5],[12],[16],[33]
Basis spread on variable rate 4.75% [14],[18],[19],[22] 4.75% [5],[12],[16],[33]
Interest rate, cash 8.40% [14],[18],[19],[22] 8.50% [5],[12],[16],[33]
Investment, Identifier [Axis]: Beyond Risk Management, Inc. | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[12],[15],[16] $ 1,775  
Fair value at ending balance [5],[12],[15],[16]   $ 1,775
Basis spread on variable rate [5],[12],[15],[16]   4.50%
Interest rate, cash [5],[12],[15],[16]   8.40%
Investment, Identifier [Axis]: Bidwax | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[12],[16],[27] 8,188  
Fair value at ending balance $ 7,971 [3],[14],[18],[28] $ 8,188 [7],[12],[16],[27]
Basis spread on variable rate 6.25% [3],[14],[18],[28] 6.50% [7],[12],[16],[27]
Interest rate, cash 8.60% [3],[14],[18],[28] 8.60% [7],[12],[16],[27]
Investment, Identifier [Axis]: Biolam Group | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [6],[7],[12],[16],[24],[27],[39] $ 1,731  
Gross Additions [39],[40] 0  
Gross Reductions [39],[41] 0  
Amount of Realized Gain (Loss) [39] 0  
Amount of Unrealized Gain (Loss) [39] (419)  
Fair value at ending balance [39] 1,312 [2],[3],[14],[18],[25],[28] $ 1,731 [6],[7],[12],[16],[24],[27]
Amount of Interest or Dividends Credited to Income [39],[42] $ 0  
Basis spread on variable rate 4.50% [2],[3],[14],[18],[25],[28],[39] 4.50% [6],[7],[12],[16],[24],[27]
Investment, interest rate, paid in kind 6.60% [2],[3],[14],[18],[25],[28],[39] 6.50% [6],[7],[12],[16],[24],[27]
Investment, Identifier [Axis]: Biolam Group | Ordinary Shares    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [6],[7],[10],[12] $ 0  
Gross Additions [40] 0  
Gross Reductions [41] 0  
Amount of Realized Gain (Loss) 0  
Amount of Unrealized Gain (Loss) 0  
Fair value at ending balance 0 [2],[3],[8],[14] $ 0 [6],[7],[10],[12]
Amount of Interest or Dividends Credited to Income [42] $ 0  
Investment owned, balance (in shares) 42,639,498 [2],[3],[8],[14] 42,639,498 [6],[7],[10],[12]
Investment, Identifier [Axis]: Biolam | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [43] $ 1,731 $ 0
Gross Additions [43],[44]   1,258
Gross Reductions [43],[45]   (128)
Amount of Realized Gain (Loss) [43]   44
Amount of Unrealized Gain (Loss) [43]   557
Fair value at ending balance [43]   1,731
Amount of Interest or Dividends Credited to Income [43],[46]   $ (27)
Basis spread on variable rate [43]   4.50%
Investment, interest rate, paid in kind [43]   6.50%
Investment, Identifier [Axis]: Biolam | Ordinary Shares    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance 0 $ 0
Gross Additions [44]   0
Gross Reductions [45]   0
Amount of Realized Gain (Loss)   0
Amount of Unrealized Gain (Loss)   0
Fair value at ending balance   0
Amount of Interest or Dividends Credited to Income [46]   $ 0
Investment owned, balance (in shares)   42,639,498
Investment, Identifier [Axis]: Bishop Street Underwriters, LLC | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [12],[16],[23] 4,830  
Fair value at ending balance $ 4,733 [14],[18],[19],[22] $ 4,830 [12],[16],[23]
Basis spread on variable rate 5.00% [14],[18],[19],[22] 5.50% [12],[16],[23]
Interest rate, cash 8.60% [14],[18],[19],[22] 9.20% [12],[16],[23]
Investment, Identifier [Axis]: Bishop Street Underwriters, LLC | LLC Units    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [10],[12] $ 361  
Fair value at ending balance $ 272 [14] $ 361 [10],[12]
Investment owned, balance (in shares) 188,809.2 [14] 188,809.2 [10],[12]
Investment, Identifier [Axis]: Bitly, Inc. | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [12],[15],[16] $ 4,763  
Fair value at ending balance $ 2,287 [14],[18],[22] $ 4,763 [12],[15],[16]
Basis spread on variable rate 4.50% [14],[18],[22] 4.75% [12],[15],[16]
Interest rate, cash 8.20% [14],[18],[22] 8.60% [12],[15],[16]
Investment, Identifier [Axis]: Bitly, Inc. | Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[12],[15],[16] $ (2)  
Fair value at ending balance $ (1) [14],[18],[19],[22] $ (2) [5],[12],[15],[16]
Basis spread on variable rate 4.50% [14],[18],[19],[22] 4.75% [5],[12],[15],[16]
Interest rate, cash 8.20% [14],[18],[19],[22] 8.60% [5],[12],[15],[16]
Investment, Identifier [Axis]: Black Angus Steakhouses, LLC | First Lien Senior Secured Term Loan 1    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [47] $ 0 $ 0
Gross Additions [47],[48]   0
Gross Reductions [47],[49]   0
Amount of Realized Gain (Loss) [47]   (9,628)
Amount of Unrealized Gain (Loss) [47]   9,628
Fair value at ending balance [47]   0
Amount of Interest or Dividends Credited to Income [47],[50]   $ 0
Investment, interest rate, paid in kind   10.00%
Investment, Identifier [Axis]: Black Angus Steakhouses, LLC | First Lien Senior Secured Term Loan 2    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [47] 0 $ 2,744
Gross Additions [47],[48]   0
Gross Reductions [47],[49]   (610)
Amount of Realized Gain (Loss) [47]   (7,481)
Amount of Unrealized Gain (Loss) [47]   5,347
Fair value at ending balance [47]   0
Amount of Interest or Dividends Credited to Income [47],[50]   $ (6)
Investment, interest rate, paid in kind   14.40%
Investment, Identifier [Axis]: Black Angus Steakhouses, LLC | LLC Units    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance 0 $ 0
Gross Additions [48]   0
Gross Reductions [49]   0
Amount of Realized Gain (Loss)   0
Amount of Unrealized Gain (Loss)   0
Fair value at ending balance   0
Amount of Interest or Dividends Credited to Income [50]   $ 0
Investment owned, balance (in shares)   44.6
Investment, Identifier [Axis]: Bounteous, Inc. | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [12],[16],[23] 4,064  
Fair value at ending balance $ 4,029 [14],[17],[18] $ 4,064 [12],[16],[23]
Basis spread on variable rate 4.75% [14],[17],[18] 4.75% [12],[16],[23]
Interest rate, cash 8.50% [14],[17],[18] 8.50% [12],[16],[23]
Investment, Identifier [Axis]: Breeze Aviation Group Inc | Second Lien Senior Secured Term Loan 1    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [12],[15],[16] $ 2,361  
Fair value at ending balance $ 2,230 [14],[17],[18] $ 2,361 [12],[15],[16]
Basis spread on variable rate 7.50% [14],[17],[18] 7.50% [12],[15],[16]
Interest rate, cash 11.20% [14],[17],[18] 11.50% [12],[15],[16]
Investment, Identifier [Axis]: Breeze Aviation Group Inc | Second Lien Senior Secured Term Loan 2    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [12],[15],[16] $ 2,385  
Fair value at ending balance $ 2,256 [14],[17],[18] $ 2,385 [12],[15],[16]
Basis spread on variable rate 7.50% [14],[17],[18] 7.50% [12],[15],[16]
Interest rate, cash 11.20% [14],[17],[18] 11.50% [12],[15],[16]
Investment, Identifier [Axis]: Breeze Aviation Group Inc | Second Lien Senior Secured Term Loan 3    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [12],[15],[16] $ 2,386  
Fair value at ending balance $ 2,256 [14],[17],[18] $ 2,386 [12],[15],[16]
Basis spread on variable rate 7.50% [14],[17],[18] 7.50% [12],[15],[16]
Interest rate, cash 11.20% [14],[17],[18] 11.50% [12],[15],[16]
Investment, Identifier [Axis]: Breeze Aviation Group Inc | Second Lien Senior Secured Term Loan 4    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [14],[17],[18] $ 2,431  
Basis spread on variable rate [14],[17],[18] 7.50%  
Interest rate, cash [14],[17],[18] 11.20%  
Investment, Identifier [Axis]: Breeze Aviation Group Inc | Second Lien Senior Secured Term Loan 5    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [14],[17],[18] $ 2,431  
Basis spread on variable rate [14],[17],[18] 7.50%  
Interest rate, cash [14],[17],[18] 11.20%  
Investment, Identifier [Axis]: Breeze Aviation Group Inc | Second Lien Senior Secured Term Loan 6    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [14],[17],[18] $ 2,431  
Basis spread on variable rate [14],[17],[18] 7.50%  
Interest rate, cash [14],[17],[18] 11.20%  
Investment, Identifier [Axis]: Bridger Aerospace Group Holdings, LLC | Preferred Stock- Series C    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [12] $ 16,336  
Fair value at ending balance $ 16,984 [14] $ 16,336 [12]
Investment, interest rate, paid in kind 7.00% [14] 7.00% [12]
Investment owned, balance (in shares) 14,618 [14] 14,618 [12]
Investment, Identifier [Axis]: BrightSign LLC | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [12],[16],[23] $ 5,023  
Fair value at ending balance $ 4,922 [14],[18],[22] $ 5,023 [12],[16],[23]
Basis spread on variable rate 5.25% [14],[18],[22] 5.25% [12],[16],[23]
Interest rate, cash 9.00% [14],[18],[22] 9.00% [12],[16],[23]
Investment, Identifier [Axis]: BrightSign LLC | LLC Units    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [12] $ 1,384  
Fair value at ending balance $ 1,484 [14] $ 1,384 [12]
Investment owned, balance (in shares) 1,107,492.71 [14] 1,107,492.71 [12]
Investment, Identifier [Axis]: BrightSign LLC | Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[12],[16],[23] $ 997  
Fair value at ending balance $ (20) [14],[18],[19],[22] $ 997 [5],[12],[16],[23]
Basis spread on variable rate 5.25% [14],[18],[19],[22] 5.25% [5],[12],[16],[23]
Interest rate, cash 9.00% [14],[18],[19],[22] 9.00% [5],[12],[16],[23]
Investment, Identifier [Axis]: British Engineering Services Holdco Limited | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[12],[16],[31] $ 13,936  
Fair value at ending balance $ 14,785 [3],[14],[18],[32] $ 13,936 [7],[12],[16],[31]
Basis spread on variable rate 2.80% [3],[14],[18],[32] 4.00% [7],[12],[16],[31]
Investment, interest rate, paid in kind 5.00% [3],[14],[18],[32] 3.80% [7],[12],[16],[31]
Interest rate, cash 6.70% [3],[14],[18],[32] 8.50% [7],[12],[16],[31]
Investment, Identifier [Axis]: Broadstone Group UK LTD | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[7],[12],[16],[31] $ 1,731  
Fair value at ending balance $ 1,829 [3],[14],[18],[19],[32] $ 1,731 [5],[7],[12],[16],[31]
Basis spread on variable rate 4.75% [3],[14],[18],[19],[32] 4.75% [5],[7],[12],[16],[31]
Interest rate, cash 8.50% [3],[14],[18],[19],[32] 8.70% [5],[7],[12],[16],[31]
Investment, Identifier [Axis]: Broadway Buyer, LLC | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[12],[15],[16] $ 2,136  
Fair value at ending balance $ 2,132 [14],[17],[18],[19] $ 2,136 [5],[12],[15],[16]
Basis spread on variable rate 4.25% [14],[17],[18],[19] 4.50% [5],[12],[15],[16]
Interest rate, cash 8.00% [14],[17],[18],[19] 8.20% [5],[12],[15],[16]
Investment, Identifier [Axis]: Broadway Buyer, LLC | LLC Units    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [10],[12] $ 312  
Fair value at ending balance $ 387 [8],[14] $ 312 [10],[12]
Investment owned, balance (in shares) 312,055 [8],[14] 312,055 [10],[12]
Investment, Identifier [Axis]: Broadway Buyer, LLC | Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[12],[15],[16] $ (10)  
Fair value at ending balance $ 108 [14],[17],[18],[19] $ (10) [5],[12],[15],[16]
Basis spread on variable rate 4.25% [14],[17],[18],[19] 4.50% [5],[12],[15],[16]
Interest rate, cash 8.00% [14],[17],[18],[19] 8.20% [5],[12],[15],[16]
Investment, Identifier [Axis]: Brown Machine Group Holdings, LLC | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [12],[15],[16] $ 5,513  
Fair value at ending balance $ 5,288 [14],[17],[18] $ 5,513 [12],[15],[16]
Basis spread on variable rate 6.25% [14],[17],[18] 6.25% [12],[15],[16]
Interest rate, cash 10.10% [14],[17],[18] 10.10% [12],[15],[16]
Investment, Identifier [Axis]: Burgess Point Purchaser Corporation | LP Units    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [10],[12] $ 334  
Fair value at ending balance $ 409 [8],[14] $ 334 [10],[12]
Investment owned, balance (in shares) 455 [8],[14] 455 [10],[12]
Investment, Identifier [Axis]: Burgess Point Purchaser Corporation | Second Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [12],[15],[16] $ 3,986  
Fair value at ending balance $ 4,159 [14],[17],[18] $ 3,986 [12],[15],[16]
Basis spread on variable rate 9.00% [14],[17],[18] 9.00% [12],[15],[16]
Interest rate, cash 12.80% [14],[17],[18] 12.90% [12],[15],[16]
Investment, Identifier [Axis]: CCFF Buyer, LLC | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[12],[16],[33] $ 5,953  
Fair value at ending balance $ 5,990 [14],[17],[18],[19] $ 5,953 [5],[12],[16],[33]
Basis spread on variable rate 5.00% [14],[17],[18],[19] 5.00% [5],[12],[16],[33]
Interest rate, cash 8.60% [14],[17],[18],[19] 9.10% [5],[12],[16],[33]
Investment, Identifier [Axis]: CCFF Buyer, LLC | LLC Units    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [10],[12] $ 262  
Fair value at ending balance $ 267 [8],[14] $ 262 [10],[12]
Investment owned, balance (in shares) 233 [8],[14] 233 [10],[12]
Investment, Identifier [Axis]: CCFF Buyer, LLC | Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[12],[16],[33] $ (8)  
Fair value at ending balance $ (5) [14],[17],[18],[19] $ (8) [5],[12],[16],[33]
Basis spread on variable rate 5.00% [14],[17],[18],[19] 5.00% [5],[12],[16],[33]
Interest rate, cash 8.60% [14],[17],[18],[19] 9.10% [5],[12],[16],[33]
Investment, Identifier [Axis]: CEC Entertainment, LLC | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [12],[15],[16] $ 3,429  
Fair value at ending balance $ 3,391 [14],[17],[18] $ 3,429 [12],[15],[16]
Basis spread on variable rate 6.00% [14],[17],[18] 6.00% [12],[15],[16]
Interest rate, cash 9.70% [14],[17],[18] 9.70% [12],[15],[16]
Investment, Identifier [Axis]: CGI Parent, LLC | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [12],[15],[16] $ 13,515  
Fair value at ending balance $ 13,382 [14],[17],[18] $ 13,515 [12],[15],[16]
Basis spread on variable rate 4.50% [14],[17],[18] 4.50% [12],[15],[16]
Interest rate, cash 8.20% [14],[17],[18] 8.40% [12],[15],[16]
Investment, Identifier [Axis]: CGI Parent, LLC | Preferred Stock    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [10],[12] $ 1,947  
Fair value at ending balance $ 1,647 [8],[14] $ 1,947 [10],[12]
Investment owned, balance (in shares) 657 [8],[14] 657 [10],[12]
Investment, Identifier [Axis]: CGI Parent, LLC | Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[12],[15],[16] $ 0  
Fair value at ending balance $ (7) [14],[17],[18],[19] $ 0 [5],[12],[15],[16]
Basis spread on variable rate 4.50% [14],[17],[18],[19] 4.50% [5],[12],[15],[16]
Interest rate, cash 8.20% [14],[17],[18],[19] 8.40% [5],[12],[15],[16]
Investment, Identifier [Axis]: CH Buyer, LLC | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [12],[15],[16] $ 872  
Fair value at ending balance $ 870 [14],[17],[18] $ 872 [12],[15],[16]
Basis spread on variable rate 6.25% [14],[17],[18] 6.25% [12],[15],[16]
Interest rate, cash 9.90% [14],[17],[18] 10.20% [12],[15],[16]
Investment, Identifier [Axis]: CH Buyer, LLC | LLC Units    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [10],[12] $ 78  
Fair value at ending balance $ 72 [8],[14] $ 78 [10],[12]
Investment owned, balance (in shares) 685 [8],[14] 685 [10],[12]
Investment, Identifier [Axis]: CH Buyer, LLC | Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[12],[15],[16] $ 0  
Fair value at ending balance $ 0 [14],[17],[18],[19] $ 0 [5],[12],[15],[16]
Basis spread on variable rate 6.25% [14],[17],[18],[19] 6.25% [5],[12],[15],[16]
Interest rate, cash 9.90% [14],[17],[18],[19] 10.20% [5],[12],[15],[16]
Investment, Identifier [Axis]: CM Acquisitions Holdings Inc. | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [12],[16],[33] $ 11,452  
Fair value at ending balance $ 6,649 [14],[17],[18] $ 11,452 [12],[16],[33]
Basis spread on variable rate 5.50% [14],[17],[18] 5.50% [12],[16],[33]
Investment, interest rate, paid in kind [12],[16],[33]   2.50%
Interest rate, cash 9.20% [14],[17],[18] 9.10% [12],[16],[33]
Investment, Identifier [Axis]: CMT Opco Holding, LLC (Concept Machine) | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [14],[17],[18] $ 4,149  
Basis spread on variable rate [14],[17],[18] 5.00%  
Investment, interest rate, paid in kind [14],[17],[18] 1.00%  
Interest rate, cash [14],[17],[18] 8.80%  
Investment, Identifier [Axis]: CMT Opco Holding, LLC (Concept Machine) | First Lien Senior Secured Term Loan 1    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [12],[15],[16] $ 3,489  
Fair value at ending balance [12],[15],[16]   $ 3,489
Basis spread on variable rate [12],[15],[16]   6.00%
Investment, interest rate, paid in kind [12],[15],[16]   1.00%
Interest rate, cash [12],[15],[16]   10.00%
Investment, Identifier [Axis]: CMT Opco Holding, LLC (Concept Machine) | First Lien Senior Secured Term Loan 2    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [12],[15],[16] 568  
Fair value at ending balance [12],[15],[16]   $ 568
Basis spread on variable rate [12],[15],[16]   5.25%
Investment, interest rate, paid in kind [12],[15],[16]   0.30%
Interest rate, cash [12],[15],[16]   9.20%
Investment, Identifier [Axis]: CMT Opco Holding, LLC (Concept Machine) | LLC Units    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [10],[12] 0  
Fair value at ending balance $ 0 [8],[14] $ 0 [10],[12]
Investment owned, balance (in shares) 12,634.8 [8],[14] 12,634.8 [10],[12]
Investment, Identifier [Axis]: CTI Foods Holdings Co., LLC | Common Stock    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [10],[12] $ 1,518  
Fair value at ending balance $ 1,779 [8],[14] $ 1,518 [10],[12]
Investment owned, balance (in shares) 21,031 [8],[14] 21,031 [10],[12]
Investment, Identifier [Axis]: CTI Foods Holdings Co., LLC | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [12],[15],[16] $ 11,014  
Fair value at ending balance $ 10,946 [14],[17],[18] $ 11,014 [12],[15],[16]
Basis spread on variable rate 7.86% [14],[17],[18] 7.86% [12],[15],[16]
Interest rate, cash 11.80% [14],[17],[18] 12.00% [12],[15],[16]
Investment, Identifier [Axis]: CTI Foods Holdings Co., LLC | First Out Term Loan 1    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [12],[15],[16] $ 2,400  
Fair value at ending balance $ 2,577 [14],[17],[18] $ 2,400 [12],[15],[16]
Basis spread on variable rate 10.00% [14],[17],[18] 10.00% [12],[15],[16]
Investment, interest rate, paid in kind 13.90% [14],[17],[18] 14.10% [12],[15],[16]
Investment, Identifier [Axis]: CTI Foods Holdings Co., LLC | First Out Term Loan 2    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [12],[15],[16] $ 881  
Fair value at ending balance $ 932 [14],[17],[18] $ 881 [12],[15],[16]
Basis spread on variable rate 7.00% [14],[17],[18] 7.00% [12],[15],[16]
Investment, interest rate, paid in kind 10.90% [14],[17],[18] 11.10% [12],[15],[16]
Investment, Identifier [Axis]: CTI Foods Holdings Co., LLC | Last In First Out Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [12],[15],[16] $ 4,870  
Fair value at ending balance $ 5,229 [14],[17],[18] $ 4,870 [12],[15],[16]
Basis spread on variable rate 10.00% [14],[17],[18] 9.00% [12],[15],[16]
Investment, interest rate, paid in kind 13.90% [14],[17],[18] 13.10% [12],[15],[16]
Investment, Identifier [Axis]: CTI Foods Holdings Co., LLC | Second Out Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [12],[15],[16] $ 683  
Fair value at ending balance $ 730 [14],[17],[18] $ 683 [12],[15],[16]
Basis spread on variable rate 9.00% [14],[17],[18] 9.00% [12],[15],[16]
Investment, interest rate, paid in kind 12.90% [14],[17],[18] 13.10% [12],[15],[16]
Investment, Identifier [Axis]: CTS US Bidco, Inc. | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[12],[15],[16] $ 3,717  
Fair value at ending balance $ 3,823 [3],[14],[17],[18] $ 3,717 [7],[12],[15],[16]
Basis spread on variable rate 6.00% [3],[14],[17],[18] 6.00% [7],[12],[15],[16]
Interest rate, cash 9.70% [3],[14],[17],[18] 9.80% [7],[12],[15],[16]
Investment, Identifier [Axis]: CW Group Holdings, LLC | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[12],[15],[16] $ 5,173  
Fair value at ending balance $ 5,147 [14],[17],[18],[19] $ 5,173 [5],[12],[15],[16]
Basis spread on variable rate 4.50% [14],[17],[18],[19] 4.50% [5],[12],[15],[16]
Interest rate, cash 8.20% [14],[17],[18],[19] 8.20% [5],[12],[15],[16]
Investment, Identifier [Axis]: CW Group Holdings, LLC | LLC Units    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [10],[12] $ 500  
Fair value at ending balance $ 487 [8],[14] $ 500 [10],[12]
Investment owned, balance (in shares) 161,290.32 [8],[14] 161,290.32 [10],[12]
Investment, Identifier [Axis]: Caldwell & Gregory LLC | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[12],[15],[16] $ 14,308  
Fair value at ending balance $ 14,691 [14],[17],[18],[19] $ 14,308 [5],[12],[15],[16]
Basis spread on variable rate 4.75% [14],[17],[18],[19] 4.75% [5],[12],[15],[16]
Interest rate, cash 8.50% [14],[17],[18],[19] 8.40% [5],[12],[15],[16]
Investment, Identifier [Axis]: Caldwell & Gregory LLC | Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[12],[15],[16] $ (22)  
Fair value at ending balance $ 0 [14],[17],[18],[19] $ (22) [5],[12],[15],[16]
Basis spread on variable rate 4.75% [14],[17],[18],[19] 4.75% [5],[12],[15],[16]
Interest rate, cash 8.50% [14],[17],[18],[19] 8.40% [5],[12],[15],[16]
Investment, Identifier [Axis]: Canadian Orthodontic Partners Corp. | Class A Equity    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[10],[12] $ 0  
Fair value at ending balance $ 0 [3],[8],[14] $ 0 [7],[10],[12]
Investment owned, balance (in shares) 500,000 [3],[8],[14] 500,000 [7],[10],[12]
Investment, Identifier [Axis]: Canadian Orthodontic Partners Corp. | Class C - Warrants    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[10],[12] $ 0  
Fair value at ending balance $ 0 [3],[8],[14] $ 0 [7],[10],[12]
Investment owned, balance (in shares) 74,712.64 [3],[8],[14] 74,712.64 [7],[10],[12]
Investment, Identifier [Axis]: Canadian Orthodontic Partners Corp. | Class X Equity    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[10],[12] $ 0  
Fair value at ending balance $ 0 [3],[8],[14] $ 0 [7],[10],[12]
Investment owned, balance (in shares) 45,604 [3],[8],[14] 45,604 [7],[10],[12]
Investment, Identifier [Axis]: Canadian Orthodontic Partners Corp. | Common Stock    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[10],[12] $ 0  
Fair value at ending balance $ 0 [3],[8],[14] $ 0 [7],[10],[12]
Investment owned, balance (in shares) 14.37 [3],[8],[14] 14.37 [7],[10],[12]
Investment, Identifier [Axis]: Canadian Orthodontic Partners Corp. | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[12],[16],[24],[51] $ 161  
Fair value at ending balance $ 121 [3],[14],[18],[25],[52] $ 161 [7],[12],[16],[24],[51]
Basis spread on variable rate 7.00% [3],[14],[18],[25],[52] 7.00% [7],[12],[16],[24],[51]
Investment, interest rate, paid in kind 9.30% [3],[14],[18],[25],[52] 10.30% [7],[12],[16],[24],[51]
Investment, Identifier [Axis]: Canadian Orthodontic Partners Corp. | Super Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[7],[12] $ 268  
Fair value at ending balance $ 229 [3],[14],[19] $ 268 [5],[7],[12]
Investment, interest rate, paid in kind [5],[7],[12]   15.00%
Interest rate, cash [3],[14],[19] 17.00%  
Investment, Identifier [Axis]: Cascade Residential Services LLC | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [12],[15],[16] $ 4,537  
Fair value at ending balance $ 4,212 [14],[18],[22] $ 4,537 [12],[15],[16]
Basis spread on variable rate 6.00% [14],[18],[22] 6.00% [12],[15],[16]
Interest rate, cash 9.70% [14],[18],[22] 9.70% [12],[15],[16]
Investment, Identifier [Axis]: Cascade Residential Services LLC | Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[12],[15],[16] $ (5)  
Fair value at ending balance $ 172 [14],[18],[19],[22] $ (5) [5],[12],[15],[16]
Basis spread on variable rate 6.00% [14],[18],[19],[22] 6.00% [5],[12],[15],[16]
Interest rate, cash 9.70% [14],[18],[19],[22] 9.70% [5],[12],[15],[16]
Investment, Identifier [Axis]: Catawba River Limited | Structured - Junior Note    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[10],[12] $ 1,868  
Fair value at ending balance 2,217 [3],[8],[14] $ 1,868 [7],[10],[12]
Investment, Identifier [Axis]: Celebration Bidco, LLC | Common Stock    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance 8,925 [6],[10],[12] 11,262
Gross Additions 0 [40] 0 [44]
Gross Reductions 0 [41] 0 [45]
Amount of Realized Gain (Loss) 0 0
Amount of Unrealized Gain (Loss) 1,430 (2,337)
Fair value at ending balance 10,355 [2],[8],[14] 8,925 [6],[10],[12]
Amount of Interest or Dividends Credited to Income $ 0 [42] $ 0 [46]
Investment owned, balance (in shares) 1,243,071 [2],[8],[14] 1,243,071 [6],[10],[12]
Investment, Identifier [Axis]: Celebration Bidco, LLC | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance $ 8,463 [6],[12],[15] $ 6,414
Gross Additions 43 [40] 2,266 [44]
Gross Reductions 0 [41] 0 [45]
Amount of Realized Gain (Loss) 0 0
Amount of Unrealized Gain (Loss) 72 (217)
Fair value at ending balance 8,578 [2],[14],[17],[18] 8,463 [6],[12],[15]
Amount of Interest or Dividends Credited to Income $ 512 [42] $ 987 [46]
Basis spread on variable rate 8.00% [2],[14],[17],[18] 8.00% [6],[12],[15]
Investment, interest rate, paid in kind [6],[12],[15]   11.70%
Interest rate, cash [2],[14],[17],[18] 11.70%  
Investment, Identifier [Axis]: Ceres Pharma NV | First Lien Senior Secured Term Loan 1    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[12],[16],[27] $ 3,593  
Fair value at ending balance $ 3,525 [3],[14],[18],[28] $ 3,593 [7],[12],[16],[27]
Basis spread on variable rate 6.00% [3],[14],[18],[28] 6.00% [7],[12],[16],[27]
Interest rate, cash 8.50% [3],[14],[18],[28] 8.10% [7],[12],[16],[27]
Investment, Identifier [Axis]: Ceres Pharma NV | First Lien Senior Secured Term Loan 2    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[7],[12],[16],[27] $ 666  
Fair value at ending balance $ 648 [3],[14],[18],[28] $ 666 [5],[7],[12],[16],[27]
Basis spread on variable rate 7.00% [3],[14],[18],[28] 7.00% [5],[7],[12],[16],[27]
Interest rate, cash 9.50% [3],[14],[18],[28] 9.10% [5],[7],[12],[16],[27]
Investment, Identifier [Axis]: Cherry Bekaert Advisory LLC | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [14],[17],[18],[19] $ 9,175  
Basis spread on variable rate [14],[17],[18],[19] 5.00%  
Interest rate, cash [14],[17],[18],[19] 8.60%  
Investment, Identifier [Axis]: Cherry Bekaert Advisory LLC | Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [14],[17],[18] $ 966  
Basis spread on variable rate [14],[17],[18] 5.00%  
Interest rate, cash [14],[17],[18] 8.60%  
Investment, Identifier [Axis]: CloudOne Digital Corp. | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [12],[15],[16] $ 12,160  
Fair value at ending balance $ 12,125 [14],[17],[18] $ 12,160 [12],[15],[16]
Basis spread on variable rate 4.75% [14],[17],[18] 5.00% [12],[15],[16]
Interest rate, cash 8.40% [14],[17],[18] 9.20% [12],[15],[16]
Investment, Identifier [Axis]: CloudOne Digital Corp. | Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[12],[15],[16] $ (29)  
Fair value at ending balance $ (24) [14],[17],[18],[19] $ (29) [5],[12],[15],[16]
Basis spread on variable rate 4.75% [14],[17],[18],[19] 5.00% [5],[12],[15],[16]
Interest rate, cash 8.40% [14],[17],[18],[19] 9.20% [5],[12],[15],[16]
Investment, Identifier [Axis]: Coastal Marina Holdings, LLC | LLC Units    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance $ 19,983 [6],[10],[12] $ 16,852
Gross Additions 0 [40] 0 [44]
Gross Reductions 0 [41] 0 [45]
Amount of Realized Gain (Loss) 0 0
Amount of Unrealized Gain (Loss) 563 3,131
Fair value at ending balance 20,546 [2],[8],[14] 19,983 [6],[10],[12]
Amount of Interest or Dividends Credited to Income $ 0 [42] $ 0 [46]
Investment owned, balance (in shares) 3,518,097 [2],[8],[14] 3,518,097 [6],[10],[12]
Investment, Identifier [Axis]: Coastal Marina Holdings, LLC | Subordinated Term Loan 1    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance $ 15,891 [6],[12] $ 15,770
Gross Additions 55 [40] 103 [44]
Gross Reductions 0 [41] 0 [45]
Amount of Realized Gain (Loss) 0 0
Amount of Unrealized Gain (Loss) 55 18
Fair value at ending balance 16,001 [2],[14] 15,891 [6],[12]
Amount of Interest or Dividends Credited to Income $ 714 [42] $ 1,432 [46]
Interest rate, cash 8.00% [2],[14] 8.00% [6],[12]
Investment, Identifier [Axis]: Coastal Marina Holdings, LLC | Subordinated Term Loan 2    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance $ 7,327 [6],[12] $ 7,271
Gross Additions 20 [40] 38 [44]
Gross Reductions 0 [41] 0 [45]
Amount of Realized Gain (Loss) 0 0
Amount of Unrealized Gain (Loss) 30 18
Fair value at ending balance 7,377 [2],[14] 7,327 [6],[12]
Amount of Interest or Dividends Credited to Income $ 324 [42] $ 650 [46]
Interest rate, cash 8.00% [2],[14] 8.00% [6],[12]
Investment, Identifier [Axis]: Cobham Slip Rings SAS | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[12],[15],[16] $ 1,303  
Fair value at ending balance $ 1,303 [3],[14],[17],[18] $ 1,303 [7],[12],[15],[16]
Basis spread on variable rate 6.00% [3],[14],[17],[18] 6.00% [7],[12],[15],[16]
Interest rate, cash 9.70% [3],[14],[17],[18] 9.90% [7],[12],[15],[16]
Investment, Identifier [Axis]: Coherus Biosciences, Inc. | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [12],[15],[16] $ 3,963  
Fair value at ending balance $ 3,923 [14],[17],[18] $ 3,963 [12],[15],[16]
Basis spread on variable rate 8.00% [14],[17],[18] 8.00% [12],[15],[16]
Interest rate, cash 11.70% [14],[17],[18] 11.70% [12],[15],[16]
Investment, Identifier [Axis]: Coherus Biosciences, Inc. | Royalty Rights    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [12] $ 1,486  
Fair value at ending balance 1,459 [14] $ 1,486 [12]
Investment, Identifier [Axis]: Command Alkon (Project Potter Buyer, LLC) | Class B Partnership Units    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [10],[12] 187  
Fair value at ending balance $ 163 [8],[14] $ 187 [10],[12]
Investment owned, balance (in shares) 33,324.7 [8],[14] 33,324.7 [10],[12]
Investment, Identifier [Axis]: Compass Precision, LLC | LLC Units    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [10],[12] $ 383  
Fair value at ending balance $ 393 [8],[14] $ 383 [10],[12]
Investment owned, balance (in shares) 46,085.6 [8],[14] 46,085.6 [10],[12]
Investment, Identifier [Axis]: Compass Precision, LLC | Senior Subordinated Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [12] $ 655  
Fair value at ending balance $ 658 [14] $ 655 [12]
Investment, interest rate, paid in kind 1.00% [14] 1.00% [12]
Interest rate, cash 11.00% [14] 11.00% [12]
Investment, Identifier [Axis]: Comply365, LLC | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [14],[17],[18] $ 10,721  
Basis spread on variable rate [14],[17],[18] 5.25%  
Interest rate, cash [14],[17],[18] 9.00%  
Investment, Identifier [Axis]: Comply365, LLC | First Lien Senior Secured Term Loan 1    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [12],[15],[16] $ 7,505  
Fair value at ending balance [12],[15],[16]   $ 7,505
Basis spread on variable rate [12],[15],[16]   5.00%
Interest rate, cash [12],[15],[16]   8.90%
Investment, Identifier [Axis]: Comply365, LLC | First Lien Senior Secured Term Loan 2    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [12],[15],[16] 3,278  
Fair value at ending balance [12],[15],[16]   $ 3,278
Basis spread on variable rate [12],[15],[16]   5.25%
Interest rate, cash [12],[15],[16]   9.20%
Investment, Identifier [Axis]: Comply365, LLC | Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[12],[15],[16] 293  
Fair value at ending balance $ 290 [14],[17],[18],[19] $ 293 [5],[12],[15],[16]
Basis spread on variable rate 5.25% [14],[17],[18],[19] 5.00% [5],[12],[15],[16]
Interest rate, cash 9.00% [14],[17],[18],[19] 8.90% [5],[12],[15],[16]
Investment, Identifier [Axis]: Contabo Finco S.À R.L | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [3],[14],[18],[21] $ 5,324  
Basis spread on variable rate [3],[14],[18],[21] 5.25%  
Interest rate, cash [3],[14],[18],[21] 7.40%  
Investment, Identifier [Axis]: Contabo FincoS.À R.L | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[12],[16],[20] $ 5,469  
Fair value at ending balance [7],[12],[16],[20]   $ 5,469
Basis spread on variable rate [7],[12],[16],[20]   5.40%
Interest rate, cash [7],[12],[16],[20]   7.50%
Investment, Identifier [Axis]: Coyo Uprising GmbH | Class A Units    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[10],[12] 243  
Fair value at ending balance $ 242 [3],[8],[14] $ 243 [7],[10],[12]
Investment owned, balance (in shares) 440 [3],[8],[14] 440 [7],[10],[12]
Investment, Identifier [Axis]: Coyo Uprising GmbH | Class B Units    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[10],[12] $ 420  
Fair value at ending balance $ 300 [3],[8],[14] $ 420 [7],[10],[12]
Investment owned, balance (in shares) 191 [3],[8],[14] 191 [7],[10],[12]
Investment, Identifier [Axis]: Coyo Uprising GmbH | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[7],[12],[16],[27] $ 5,477  
Fair value at ending balance $ 5,332 [3],[14],[18],[19],[28] $ 5,477 [5],[7],[12],[16],[27]
Basis spread on variable rate 6.50% [3],[14],[18],[19],[28] 6.50% [5],[7],[12],[16],[27]
Investment, interest rate, paid in kind 0.30% [3],[14],[18],[19],[28] 0.30% [5],[7],[12],[16],[27]
Interest rate, cash 9.00% [3],[14],[18],[19],[28] 8.60% [5],[7],[12],[16],[27]
Investment, Identifier [Axis]: Credit Key Funding II LLC | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[12],[15],[16] $ 4,748  
Fair value at ending balance $ 5,630 [14],[18],[19],[22] $ 4,748 [5],[12],[15],[16]
Basis spread on variable rate 7.50% [14],[18],[19],[22] 7.50% [5],[12],[15],[16]
Interest rate, cash 11.20% [14],[18],[19],[22] 11.20% [5],[12],[15],[16]
Investment, Identifier [Axis]: Credit Key Funding II LLC | Preferred Stock    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [12] $ 2,557  
Fair value at ending balance $ 2,694 [14] $ 2,557 [12]
Investment, interest rate, paid in kind 10.00% [14] 10.00% [12]
Investment owned, balance (in shares) 732,019 [14] 732,019 [12]
Interest rate, cash 10.00% [14] 10.00% [12]
Investment, Identifier [Axis]: Credit Key Funding II LLC | Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[12],[15],[16] $ (9)  
Fair value at ending balance $ 427 [14],[18],[19],[22] $ (9) [5],[12],[15],[16]
Basis spread on variable rate 7.50% [14],[18],[19],[22] 7.50% [5],[12],[15],[16]
Interest rate, cash 11.20% [14],[18],[19],[22] 11.20% [5],[12],[15],[16]
Investment, Identifier [Axis]: Credit Key Funding II LLC | Warrants    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [10],[12] $ 0  
Fair value at ending balance $ 17 [8],[14] $ 0 [10],[12]
Investment owned, balance (in shares) 862,753 [8],[14] 862,753 [10],[12]
Investment, Identifier [Axis]: DAWGS Intermediate Holdings Co. | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [12],[15],[16] $ 1,791  
Fair value at ending balance $ 1,780 [14],[17],[18] $ 1,791 [12],[15],[16]
Basis spread on variable rate 4.25% [14],[17],[18] 4.50% [12],[15],[16]
Interest rate, cash 8.00% [14],[17],[18] 8.20% [12],[15],[16]
Investment, Identifier [Axis]: DAWGS Intermediate Holdings Co. | LLC Units    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [10],[12] $ 409  
Fair value at ending balance $ 463 [8],[14] $ 409 [10],[12]
Investment owned, balance (in shares) 346.9 [8],[14] 346.9 [10],[12]
Investment, Identifier [Axis]: DAWGS Intermediate Holdings Co. | Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[12],[15],[16] $ 339  
Fair value at ending balance $ 277 [14],[17],[18],[19] $ 339 [5],[12],[15],[16]
Basis spread on variable rate 4.25% [14],[17],[18],[19] 4.50% [5],[12],[15],[16]
Interest rate, cash 8.00% [14],[17],[18],[19] 8.20% [5],[12],[15],[16]
Investment, Identifier [Axis]: DISA Holdings Corp. | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [12],[15],[16] $ 6,880  
Fair value at ending balance $ 6,776 [14],[17],[18] $ 6,880 [12],[15],[16]
Basis spread on variable rate 5.00% [14],[17],[18] 5.00% [12],[15],[16]
Interest rate, cash 8.70% [14],[17],[18] 8.60% [12],[15],[16]
Investment, Identifier [Axis]: DISA Holdings Corp. | Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[12],[15],[16] $ 114  
Fair value at ending balance $ (4) [14],[17],[18],[19] $ 114 [5],[12],[15],[16]
Basis spread on variable rate 5.00% [14],[17],[18],[19] 5.00% [5],[12],[15],[16]
Interest rate, cash 8.70% [14],[17],[18],[19] 8.60% [5],[12],[15],[16]
Investment, Identifier [Axis]: Dane Street, LLC | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [14],[17],[18],[19] $ 1,125  
Basis spread on variable rate [14],[17],[18],[19] 4.50%  
Interest rate, cash [14],[17],[18],[19] 8.20%  
Investment, Identifier [Axis]: Dane Street, LLC | Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [14],[17],[18],[19] $ (5)  
Basis spread on variable rate [14],[17],[18],[19] 4.50%  
Interest rate, cash [14],[17],[18],[19] 8.20%  
Investment, Identifier [Axis]: DataServ Integrations, LLC | Preferred Units    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [10],[12] $ 235  
Fair value at ending balance $ 237 [8],[14] $ 235 [10],[12]
Investment owned, balance (in shares) 175,459.2 [8],[14] 175,459.2 [10],[12]
Investment, Identifier [Axis]: David Wood Baking UK Ltd | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[12],[16],[31] $ 862  
Fair value at ending balance $ 872 [3],[14],[18],[32] $ 862 [7],[12],[16],[31]
Basis spread on variable rate 11.00% [3],[14],[18],[32] 10.00% [7],[12],[16],[31]
Interest rate, cash 14.70% [3],[14],[18],[32] 14.00% [7],[12],[16],[31]
Investment, Identifier [Axis]: DecksDirect, LLC | Class A Units    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [10],[12] $ 0  
Fair value at ending balance $ 0 [8],[14] $ 0 [10],[12]
Investment owned, balance (in shares) 1,016.1 [8],[14] 1,016.1 [10],[12]
Investment, Identifier [Axis]: DecksDirect, LLC | Common Stock    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [10],[12] $ 0  
Fair value at ending balance $ 0 [8],[14] $ 0 [10],[12]
Investment owned, balance (in shares) 1,280.8 [8],[14] 1,280.8 [10],[12]
Investment, Identifier [Axis]: DecksDirect, LLC | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [12],[15],[16] $ 988  
Fair value at ending balance [12],[15],[16]   $ 988
Basis spread on variable rate [12],[15],[16]   6.50%
Investment, interest rate, paid in kind [12],[15],[16]   0.30%
Interest rate, cash [12],[15],[16]   10.40%
Investment, Identifier [Axis]: DecksDirect, LLC | Preferred Stock    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [12] 0  
Fair value at ending balance $ 0 [8],[14] $ 0 [12]
Investment, interest rate, paid in kind [12]   13.00%
Investment owned, balance (in shares) 9.5 [8],[14] 9.5 [12]
Investment, Identifier [Axis]: DecksDirect, LLC | Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[12],[15],[16] $ 168  
Fair value at ending balance [5],[12],[15],[16]   $ 168
Basis spread on variable rate [5],[12],[15],[16]   6.25%
Interest rate, cash [5],[12],[15],[16]   10.20%
Investment, Identifier [Axis]: Discovery Buyer, L.P. | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[12],[15],[16] 16,904  
Fair value at ending balance $ 16,892 [14],[17],[18],[19] $ 16,904 [5],[12],[15],[16]
Basis spread on variable rate 5.00% [14],[17],[18],[19] 4.75% [5],[12],[15],[16]
Interest rate, cash 8.70% [14],[17],[18],[19] 8.60% [5],[12],[15],[16]
Investment, Identifier [Axis]: Discovery Buyer, L.P. | Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[12],[15],[16] $ (16)  
Fair value at ending balance $ (12) [14],[17],[18],[19] $ (16) [5],[12],[15],[16]
Basis spread on variable rate 5.00% [14],[17],[18],[19] 4.75% [5],[12],[15],[16]
Interest rate, cash 8.70% [14],[17],[18],[19] 8.60% [5],[12],[15],[16]
Investment, Identifier [Axis]: Diversified Packaging Holdings LLC | LLC Units    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [12] $ 456  
Fair value at ending balance $ 550 [14] $ 456 [12]
Investment owned, balance (in shares) 2,769 [14] 2,769 [12]
Investment, Identifier [Axis]: Diversified Packaging Holdings LLC | Second Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [12] $ 807  
Fair value at ending balance $ 1,031 [14] $ 807 [12]
Investment, interest rate, paid in kind [12]   1.50%
Interest rate, cash 11.00% [14] 11.00% [12]
Investment, Identifier [Axis]: Dryden 49 Senior Loan Fund, Series 2017-49A | Subordinated Structured Notes    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[9],[10] $ 2  
Fair value at ending balance [7],[9],[10]   $ 2
Investment, Identifier [Axis]: Dunlipharder B.V. | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[12],[15],[16] 1,000  
Fair value at ending balance $ 1,000 [3],[14],[17],[18] $ 1,000 [7],[12],[15],[16]
Basis spread on variable rate 5.25% [3],[14],[17],[18] 5.25% [7],[12],[15],[16]
Interest rate, cash 8.90% [3],[14],[17],[18] 9.20% [7],[12],[15],[16]
Investment, Identifier [Axis]: Durare Bidco, LLC | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[12],[15],[16] $ 1,392  
Fair value at ending balance $ 1,797 [14],[17],[18],[19] $ 1,392 [5],[12],[15],[16]
Basis spread on variable rate 4.75% [14],[17],[18],[19] 4.75% [5],[12],[15],[16]
Interest rate, cash 8.40% [14],[17],[18],[19] 8.60% [5],[12],[15],[16]
Investment, Identifier [Axis]: Durare Bidco, LLC | Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[12],[15],[16] $ (8)  
Fair value at ending balance $ (12) [14],[17],[18],[19] $ (8) [5],[12],[15],[16]
Basis spread on variable rate 4.75% [14],[17],[18],[19] 4.75% [5],[12],[15],[16]
Interest rate, cash 8.40% [14],[17],[18],[19] 8.60% [5],[12],[15],[16]
Investment, Identifier [Axis]: Dwyer Instruments, Inc. | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [12],[15],[16] $ 14,476  
Fair value at ending balance $ 14,366 [14],[17],[18] $ 14,476 [12],[15],[16]
Basis spread on variable rate 4.75% [14],[17],[18] 4.75% [12],[15],[16]
Interest rate, cash 8.50% [14],[17],[18] 8.40% [12],[15],[16]
Investment, Identifier [Axis]: EB Development | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[7],[12],[16],[20] $ 2,056  
Fair value at ending balance [5],[7],[12],[16],[20]   $ 2,056
Basis spread on variable rate [5],[7],[12],[16],[20]   5.50%
Interest rate, cash [5],[7],[12],[16],[20]   7.50%
Investment, Identifier [Axis]: EB Development | First Lien Senior Secured Term Loan 1    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [3],[14],[18],[21] $ 1,972  
Basis spread on variable rate [3],[14],[18],[21] 5.00%  
Interest rate, cash [3],[14],[18],[21] 7.30%  
Investment, Identifier [Axis]: EB Development | First Lien Senior Secured Term Loan 2    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [3],[14],[17],[18] $ 1,527  
Basis spread on variable rate [3],[14],[17],[18] 5.25%  
Interest rate, cash [3],[14],[17],[18] 9.00%  
Investment, Identifier [Axis]: EFC International | Common Stock    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [10],[12] $ 217  
Fair value at ending balance $ 212 [8],[14] $ 217 [10],[12]
Investment owned, balance (in shares) 163.83 [8],[14] 163.83 [10],[12]
Investment, Identifier [Axis]: EFC International | Senior Unsecured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [12] $ 820  
Fair value at ending balance $ 828 [14] $ 820 [12]
Basis spread on variable rate [12]   11.00%
Investment, interest rate, paid in kind 2.50% [14] 2.50% [12]
Interest rate, cash [14] 11.00%  
Investment, Identifier [Axis]: EMI Porta Holdco LLC | Common Stock    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance $ 0  
Gross Additions [40] 3,004  
Gross Reductions [41] 0  
Amount of Realized Gain (Loss) 0  
Amount of Unrealized Gain (Loss) (56)  
Fair value at ending balance 2,948 [2],[8],[14] $ 0
Amount of Interest or Dividends Credited to Income [42] $ 0  
Investment owned, balance (in shares) [2],[8],[14] 6,017,772  
Investment, Identifier [Axis]: EMI Porta Holdco LLC | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [12],[15],[16] $ 10,985  
Fair value at ending balance $ 4,656 [2],[14],[17],[18] $ 10,985 [12],[15],[16]
Basis spread on variable rate 5.50% [2],[14],[17],[18] 5.75% [12],[15],[16]
Interest rate, cash 9.10% [2],[14],[17],[18] 9.60% [12],[15],[16]
Investment, Identifier [Axis]: EMI Porta Holdco LLC | First Lien Senior Secured Term Loan 2026    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance $ 0  
Gross Additions [40] 4,656  
Gross Reductions [41] 0  
Amount of Realized Gain (Loss) 0  
Amount of Unrealized Gain (Loss) 0  
Fair value at ending balance 4,656 $ 0
Amount of Interest or Dividends Credited to Income [42] $ 59  
Basis spread on variable rate 5.50%  
Interest rate, cash 9.10%  
Investment, Identifier [Axis]: EMI Porta Holdco LLC | Preferred Stock    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance $ 0  
Gross Additions [40] 2,323  
Gross Reductions [41] 0  
Amount of Realized Gain (Loss) 0  
Amount of Unrealized Gain (Loss) 46  
Fair value at ending balance 2,369 [2],[14] 0
Amount of Interest or Dividends Credited to Income [42] $ 0  
Investment, interest rate, paid in kind [2],[14] 12.00%  
Investment owned, balance (in shares) [2],[14] 2,322,860  
Investment, Identifier [Axis]: EMI Porta Holdco LLC | Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[12],[15],[16] $ 513  
Fair value at ending balance $ 0 [2],[14],[17],[18],[19] $ 513 [5],[12],[15],[16]
Basis spread on variable rate 5.50% [2],[14],[17],[18],[19] 5.75% [5],[12],[15],[16]
Interest rate, cash 9.10% [2],[14],[17],[18],[19] 9.60% [5],[12],[15],[16]
Investment, Identifier [Axis]: EMI Porta Holdco LLC | Revolver 2026    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance $ 0  
Gross Additions [40] 127  
Gross Reductions [41] (127)  
Amount of Realized Gain (Loss) 0  
Amount of Unrealized Gain (Loss) 0  
Fair value at ending balance 0 $ 0
Amount of Interest or Dividends Credited to Income [42] $ 2  
Basis spread on variable rate 5.50%  
Interest rate, cash 9.10%  
Investment, Identifier [Axis]: ERS Holdings, LLC | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [14],[18],[19],[22] $ 1,930  
Basis spread on variable rate [14],[18],[19],[22] 4.75%  
Interest rate, cash [14],[18],[19],[22] 8.40%  
Investment, Identifier [Axis]: ERS Holdings, LLC | LLC Units    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [8],[14] $ 42  
Investment owned, balance (in shares) [8],[14] 45,975  
Investment, Identifier [Axis]: ERS Holdings, LLC | Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [14],[18],[19],[22] $ (2)  
Basis spread on variable rate [14],[18],[19],[22] 4.75%  
Interest rate, cash [14],[18],[19],[22] 8.40%  
Investment, Identifier [Axis]: EZ SMBO Bidco | First Lien Senior Secured Term Loan 1    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[12],[16],[51] $ 916  
Fair value at ending balance $ 832 [3],[14],[18],[19],[28] $ 916 [7],[12],[16],[51]
Basis spread on variable rate 5.00% [3],[14],[18],[19],[28] 5.00% [7],[12],[16],[51]
Interest rate, cash 7.60% [3],[14],[18],[19],[28] 7.80% [7],[12],[16],[51]
Investment, Identifier [Axis]: EZ SMBO Bidco | First Lien Senior Secured Term Loan 2    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[7],[12],[16],[27] $ 561  
Fair value at ending balance $ 883 [3],[14],[18],[52] $ 561 [5],[7],[12],[16],[27]
Basis spread on variable rate 5.00% [3],[14],[18],[52] 5.25% [5],[7],[12],[16],[27]
Interest rate, cash 7.30% [3],[14],[18],[52] 7.30% [5],[7],[12],[16],[27]
Investment, Identifier [Axis]: EZ SMBO Bidco | First Lien Senior Secured Term Loan 3    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[12] $ 675  
Fair value at ending balance $ 740 [3],[14],[18],[28] $ 675 [7],[12]
Basis spread on variable rate [3],[14],[18],[28] 8.00%  
Investment, interest rate, paid in kind 10.80% [3],[14],[18],[28] 8.00% [7],[12]
Investment, Identifier [Axis]: EZ SMBO Bidco | Subordinated Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [3],[14],[18],[21] $ 329  
Basis spread on variable rate [3],[14],[18],[21] 8.00%  
Interest rate, cash [3],[14],[18],[21] 10.30%  
Investment, Identifier [Axis]: Echo Global Logistics, Inc. | Partnership Equity    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [10],[12] $ 351  
Fair value at ending balance $ 966 [8],[14] $ 351 [10],[12]
Investment owned, balance (in shares) 530.92 [8],[14] 530.92 [10],[12]
Investment, Identifier [Axis]: Echo Global Logistics, Inc. | Second Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [12],[16],[23] $ 9,450  
Fair value at ending balance [12],[16],[23]   $ 9,450
Basis spread on variable rate [12],[16],[23]   7.25%
Interest rate, cash [12],[16],[23]   11.00%
Investment, Identifier [Axis]: Eclipse Business Capital Holdings LLC | First Lien Senior Secured Loan | Funded    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance 3,300  
Investment, Identifier [Axis]: Eclipse Business Capital Holdings LLC | Revolver | Funded    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance 9,900  
Fair value at ending balance 12,900 $ 9,900
Investment, Identifier [Axis]: Eclipse Business Capital, LLC | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance 0  
Gross Additions [40] 3,333  
Gross Reductions [41] 0  
Amount of Realized Gain (Loss) 0  
Amount of Unrealized Gain (Loss) 0  
Fair value at ending balance 3,333 [2],[14],[18],[19],[22] 0
Amount of Interest or Dividends Credited to Income [42] $ 33  
Basis spread on variable rate [2],[14],[18],[19],[22] 6.60%  
Interest rate, cash [2],[14],[18],[19],[22] 10.20%  
Investment, Identifier [Axis]: Eclipse Business Capital, LLC | LLC Units    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [6],[12] $ 139,539  
Gross Additions [40] 0  
Gross Reductions [41] 0  
Amount of Realized Gain (Loss) 0  
Amount of Unrealized Gain (Loss) 0  
Fair value at ending balance 139,539 [2],[14] $ 139,539 [6],[12]
Amount of Interest or Dividends Credited to Income [42] $ 8,067  
Investment owned, balance (in shares) 89,447,396 [2],[14] 89,447,396 [6],[12]
Investment, Identifier [Axis]: Eclipse Business Capital, LLC | LLC units    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance $ 139,539 $ 136,855
Gross Additions [44]   23
Gross Reductions [45]   0
Amount of Realized Gain (Loss)   0
Amount of Unrealized Gain (Loss)   2,661
Fair value at ending balance   139,539
Amount of Interest or Dividends Credited to Income [46]   $ 16,551
Investment owned, balance (in shares)   89,447,396
Investment, Identifier [Axis]: Eclipse Business Capital, LLC | Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance 9,909 [5],[6],[12],[23] $ 10,091
Gross Additions 27,736 [40] 8,650 [44]
Gross Reductions (24,757) [41] (8,820) [45]
Amount of Realized Gain (Loss) 0 0
Amount of Unrealized Gain (Loss) (9) (12)
Fair value at ending balance 12,879 [2],[14],[18],[19],[22] 9,909 [5],[6],[12],[23]
Amount of Interest or Dividends Credited to Income $ 501 [42] $ 1,116 [46]
Basis spread on variable rate 6.60% [2],[14],[18],[19],[22] 6.50% [5],[6],[12],[23]
Interest rate, cash 10.20% [2],[14],[18],[19],[22] 10.30% [5],[6],[12],[23]
Investment, Identifier [Axis]: Eclipse Business Capital, LLC | Second Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance $ 4,546 [6],[12] $ 4,545
Gross Additions 4 [40] 7 [44]
Gross Reductions 0 [41] 0 [45]
Amount of Realized Gain (Loss) 0 0
Amount of Unrealized Gain (Loss) (4) (6)
Fair value at ending balance 4,546 [2],[14] 4,546 [6],[12]
Amount of Interest or Dividends Credited to Income $ 176 [42] $ 354 [46]
Interest rate, cash 7.50% [2],[14] 7.50% [6],[12]
Investment, Identifier [Axis]: Electric Equipment & Engineering Co. | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [12] $ 318  
Fair value at ending balance $ 722 [14] $ 318 [12]
Investment, interest rate, paid in kind [14] 3.00%  
Interest rate, cash 10.50% [14] 13.50% [12]
Investment, Identifier [Axis]: Electric Equipment & Engineering Co. | LLC Units    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [10],[12] $ 354  
Fair value at ending balance $ 356 [8],[14] $ 354 [10],[12]
Investment owned, balance (in shares) 187,500 [8],[14] 187,500 [10],[12]
Investment, Identifier [Axis]: Entact Environmental Services, Inc. | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [12],[15],[16] $ 6,230  
Fair value at ending balance $ 5,980 [14],[17],[18] $ 6,230 [12],[15],[16]
Basis spread on variable rate 5.50% [14],[17],[18] 5.50% [12],[15],[16]
Interest rate, cash 9.20% [14],[17],[18] 9.20% [12],[15],[16]
Investment, Identifier [Axis]: Eurofins Digital Testing International LUX Holding SARL | Common Stock    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[10],[12] $ 0  
Fair value at ending balance $ 0 [3],[8],[14] $ 0 [7],[10],[12]
Investment owned, balance (in shares) 243,081 [3],[8],[14] 243,081 [7],[10],[12]
Investment, Identifier [Axis]: Eurofins Digital Testing International LUX Holding SARL | First Lien Senior Secured Term Loan 1    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[12],[16],[27] $ 581  
Fair value at ending balance $ 596 [3],[14],[18],[28] $ 581 [7],[12],[16],[27]
Basis spread on variable rate 6.00% [3],[14],[18],[28] 6.00% [7],[12],[16],[27]
Investment, interest rate, paid in kind 1.00% [3],[14],[18],[28] 1.00% [7],[12],[16],[27]
Interest rate, cash 8.60% [3],[14],[18],[28] 8.10% [7],[12],[16],[27]
Investment, Identifier [Axis]: Eurofins Digital Testing International LUX Holding SARL | First Lien Senior Secured Term Loan 2    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[12],[15],[16] $ 284  
Fair value at ending balance $ 300 [3],[14],[17],[18] $ 284 [7],[12],[15],[16]
Basis spread on variable rate 6.00% [3],[14],[17],[18] 6.00% [7],[12],[15],[16]
Investment, interest rate, paid in kind 1.00% [3],[14],[17],[18] 1.00% [7],[12],[15],[16]
Interest rate, cash 9.90% [3],[14],[17],[18] 10.70% [7],[12],[15],[16]
Investment, Identifier [Axis]: Eurofins Digital Testing International LUX Holding SARL | First Lien Senior Secured Term Loan 3    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[12],[16],[31] $ 894  
Fair value at ending balance $ 930 [3],[14],[18],[32] $ 894 [7],[12],[16],[31]
Basis spread on variable rate 6.00% [3],[14],[18],[32] 6.00% [7],[12],[16],[31]
Investment, interest rate, paid in kind 1.00% [3],[14],[18],[32] 1.00% [7],[12],[16],[31]
Interest rate, cash 10.00% [3],[14],[18],[32] 10.30% [7],[12],[16],[31]
Investment, Identifier [Axis]: Eurofins Digital Testing International LUX Holding SARL | Preferred Stock    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[10],[12] $ 0  
Fair value at ending balance $ 0 [3],[8],[14] $ 0 [7],[10],[12]
Investment owned, balance (in shares) 351,478 [3],[8],[14] 351,478 [7],[10],[12]
Investment, Identifier [Axis]: Eurofins Digital Testing International LUX Holding SARL | Second Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[12],[16],[27] $ 0  
Fair value at ending balance [7],[12],[16],[27]   $ 0
Basis spread on variable rate [7],[12],[16],[27]   7.00%
Investment, interest rate, paid in kind [7],[12],[16],[27]   9.20%
Investment, Identifier [Axis]: Eurofins Digital Testing International LUX Holding SARL | Subordinated Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [3],[14],[18],[21],[25] $ 0  
Basis spread on variable rate [3],[14],[18],[21],[25] 7.00%  
Investment, interest rate, paid in kind [3],[14],[18],[21],[25] 9.10%  
Investment, Identifier [Axis]: Events Software BidCo Pty Ltd | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[7],[12],[16],[34] $ 1,470  
Fair value at ending balance $ 1,585 [3],[14],[18],[35] $ 1,470 [5],[7],[12],[16],[34]
Basis spread on variable rate 6.50% [3],[14],[18],[35] 6.50% [5],[7],[12],[16],[34]
Interest rate, cash 10.60% [3],[14],[18],[35] 10.20% [5],[7],[12],[16],[34]
Investment, Identifier [Axis]: Everest Midco Limited | First Lien Senior Secured Term Loan 1    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [3],[14],[18],[21] $ 777  
Basis spread on variable rate [3],[14],[18],[21] 5.00%  
Interest rate, cash [3],[14],[18],[21] 7.30%  
Investment, Identifier [Axis]: Everest Midco Limited | First Lien Senior Secured Term Loan 2    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [3],[14],[17],[18],[19] $ 3,191  
Basis spread on variable rate [3],[14],[17],[18],[19] 4.75%  
Interest rate, cash [3],[14],[17],[18],[19] 8.50%  
Investment, Identifier [Axis]: Everest Midco Limited | Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [3],[14],[17],[18],[19] $ (7)  
Basis spread on variable rate [3],[14],[17],[18],[19] 4.75%  
Interest rate, cash [3],[14],[17],[18],[19] 8.50%  
Investment, Identifier [Axis]: Expert Institute Group Inc. | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[12],[16],[33] $ 1,071  
Fair value at ending balance $ 1,087 [14],[18],[19],[29] $ 1,071 [5],[12],[16],[33]
Basis spread on variable rate 4.25% [14],[18],[19],[29] 4.25% [5],[12],[16],[33]
Interest rate, cash 8.00% [14],[18],[19],[29] 8.10% [5],[12],[16],[33]
Investment, Identifier [Axis]: Expert Institute Group Inc. | Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[12],[16],[33] $ (5)  
Fair value at ending balance $ 0 [14],[18],[19],[29] $ (5) [5],[12],[16],[33]
Basis spread on variable rate 4.25% [14],[18],[19],[29] 4.25% [5],[12],[16],[33]
Interest rate, cash 8.00% [14],[18],[19],[29] 8.10% [5],[12],[16],[33]
Investment, Identifier [Axis]: Express Wash Acquisition Company, LLC | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [12],[15],[16] $ 3,096  
Fair value at ending balance $ 3,037 [14],[17],[18] $ 3,096 [12],[15],[16]
Basis spread on variable rate 6.25% [14],[17],[18] 6.25% [12],[15],[16]
Interest rate, cash 9.90% [14],[17],[18] 10.20% [12],[15],[16]
Investment, Identifier [Axis]: Express Wash Acquisition Company, LLC | Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[12],[15],[16] $ (10)  
Fair value at ending balance $ (12) [14],[17],[18],[19] $ (10) [5],[12],[15],[16]
Basis spread on variable rate 6.25% [14],[17],[18],[19] 6.25% [5],[12],[15],[16]
Interest rate, cash 9.90% [14],[17],[18],[19] 10.20% [5],[12],[15],[16]
Investment, Identifier [Axis]: FL Hawk Intermediate Holdings, Inc. (f/k/a Fineline Technologies, Inc.) | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [14],[18],[29] $ 6,885  
Basis spread on variable rate [14],[18],[29] 4.50%  
Interest rate, cash [14],[18],[29] 8.20%  
Investment, Identifier [Axis]: FL Hawk Intermediate Holdings, Inc. (f/k/a/ Fineline Technologies, Inc.) | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [12],[16],[23] $ 6,903  
Fair value at ending balance [12],[16],[23]   $ 6,903
Basis spread on variable rate [12],[16],[23]   4.50%
Interest rate, cash [12],[16],[23]   8.20%
Investment, Identifier [Axis]: FSS Buyer LLC | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [12],[16],[23] 9,337  
Fair value at ending balance $ 4,230 [14],[18],[22] $ 9,337 [12],[16],[23]
Basis spread on variable rate 4.50% [14],[18],[22] 4.50% [12],[16],[23]
Interest rate, cash 8.10% [14],[18],[22] 8.20% [12],[16],[23]
Investment, Identifier [Axis]: FSS Buyer LLC | LP Interest    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [10],[12] $ 18  
Fair value at ending balance $ 14 [8],[14] $ 18 [10],[12]
Investment owned, balance (in shares) 1,160.9 [8],[14] 1,160.9 [10],[12]
Investment, Identifier [Axis]: FSS Buyer LLC | LP Units    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [10],[12] $ 78  
Fair value at ending balance $ 63 [8],[14] $ 78 [10],[12]
Investment owned, balance (in shares) 5,104.3 [8],[14] 5,104.3 [10],[12]
Investment, Identifier [Axis]: FSS Buyer LLC | Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [14],[18],[19],[22] $ 0  
Basis spread on variable rate [14],[18],[19],[22] 4.50%  
Interest rate, cash [14],[18],[19],[22] 8.10%  
Investment, Identifier [Axis]: Faraday | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[12],[16],[20] $ 1,787  
Fair value at ending balance $ 1,741 [3],[14],[18],[21] $ 1,787 [7],[12],[16],[20]
Basis spread on variable rate 6.10% [3],[14],[18],[21] 5.85% [7],[12],[16],[20]
Interest rate, cash 8.40% [3],[14],[18],[21] 7.90% [7],[12],[16],[20]
Investment, Identifier [Axis]: Featherstone Bidco Limited | First Lien Senior Secured Term Loan 1    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[12],[15],[16] $ 1,009  
Fair value at ending balance $ 1,009 [3],[14],[17],[18] $ 1,009 [7],[12],[15],[16]
Basis spread on variable rate 6.00% [3],[14],[17],[18] 6.00% [7],[12],[15],[16]
Interest rate, cash 9.60% [3],[14],[17],[18] 9.90% [7],[12],[15],[16]
Investment, Identifier [Axis]: Featherstone Bidco Limited | First Lien Senior Secured Term Loan 2    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[12],[16],[31] $ 1,307  
Fair value at ending balance $ 1,289 [3],[14],[18],[32] $ 1,307 [7],[12],[16],[31]
Basis spread on variable rate 6.00% [3],[14],[18],[32] 6.00% [7],[12],[16],[31]
Interest rate, cash 9.70% [3],[14],[18],[32] 9.80% [7],[12],[16],[31]
Investment, Identifier [Axis]: Ferrellgas L.P. | Opco Preferred Units    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [12] $ 3,030  
Fair value at ending balance $ 3,030 [14] $ 3,030 [12]
Investment owned, balance (in shares) 2,886 [14] 2,886 [12]
Investment, Identifier [Axis]: FinThrive Software Intermediate Holdings Inc. | Preferred Stock    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [12] $ 5,896  
Fair value at ending balance $ 485 [8],[14] $ 5,896 [12]
Investment, interest rate, paid in kind [12]   11.00%
Investment owned, balance (in shares) 6,582.7 [8],[14] 6,582.7 [12]
Investment, Identifier [Axis]: Finaxy Holding | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[12],[16],[27] $ 4,369  
Fair value at ending balance $ 4,263 [3],[14],[18],[28] $ 4,369 [7],[12],[16],[27]
Basis spread on variable rate 4.50% [3],[14],[18],[28] 4.50% [7],[12],[16],[27]
Interest rate, cash 7.10% [3],[14],[18],[28] 6.60% [7],[12],[16],[27]
Investment, Identifier [Axis]: Finexvet | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[12],[16],[27] $ 5,077  
Fair value at ending balance $ 4,894 [3],[14],[18],[28] $ 5,077 [7],[12],[16],[27]
Basis spread on variable rate 4.00% [3],[14],[18],[28] 4.00% [7],[12],[16],[27]
Investment, interest rate, paid in kind [7],[12],[16],[27]   3.30%
Interest rate, cash 6.60% [3],[14],[18],[28] 6.10% [7],[12],[16],[27]
Investment, Identifier [Axis]: FitzMark Buyer, LLC | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [12],[16],[23] $ 3,994  
Fair value at ending balance $ 3,994 [14],[18],[22] $ 3,994 [12],[16],[23]
Basis spread on variable rate 4.50% [14],[18],[22] 4.50% [12],[16],[23]
Interest rate, cash 8.20% [14],[18],[22] 8.30% [12],[16],[23]
Investment, Identifier [Axis]: Five Star Holding LLC | LLC Units    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [10],[12] $ 784  
Fair value at ending balance $ 720 [8],[14] $ 784 [10],[12]
Investment owned, balance (in shares) 966.99 [8],[14] 966.99 [10],[12]
Investment, Identifier [Axis]: Five Star Holding LLC | Second Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [12],[15],[16] $ 13,692  
Fair value at ending balance $ 13,692 [14],[17],[18] $ 13,692 [12],[15],[16]
Basis spread on variable rate 7.25% [14],[17],[18] 7.25% [12],[15],[16]
Interest rate, cash 10.90% [14],[17],[18] 11.10% [12],[15],[16]
Investment, Identifier [Axis]: Flywheel Holdings Segregated Portfolio 2025-2 | LP Interest    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[10],[12] $ 2,861  
Fair value at ending balance $ 4,004 [3],[8],[14] $ 2,861 [7],[10],[12]
Investment owned, balance (in shares) 3,422,190 [3],[8],[14] 2,777,264 [7],[10],[12]
Investment, Identifier [Axis]: Flywheel Re Segregated Portfolio 2022-4 | Preferred Stock    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[12] $ 2,970  
Fair value at ending balance $ 1,527 [3],[14] $ 2,970 [7],[12]
Investment owned, balance (in shares) 2,828,286 [3],[14] 2,828,286 [7],[12]
Investment, Identifier [Axis]: Footco 40 Limited | First Lien Senior Secured Term Loan 1    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[12],[16],[20] $ 247  
Fair value at ending balance $ 232 [3],[14],[18],[21] $ 247 [7],[12],[16],[20]
Basis spread on variable rate 6.00% [3],[14],[18],[21] 6.50% [7],[12],[16],[20]
Interest rate, cash 8.50% [3],[14],[18],[21] 8.50% [7],[12],[16],[20]
Investment, Identifier [Axis]: Footco 40 Limited | First Lien Senior Secured Term Loan 2    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[12],[16],[30] $ 1,714  
Fair value at ending balance $ 1,634 [3],[14],[18],[26] $ 1,714 [7],[12],[16],[30]
Basis spread on variable rate 6.00% [3],[14],[18],[26] 6.50% [7],[12],[16],[30]
Interest rate, cash 9.70% [3],[14],[18],[26] 10.20% [7],[12],[16],[30]
Investment, Identifier [Axis]: Forest Buyer, LLC | Class A LLC Units    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [12] $ 140  
Fair value at ending balance $ 124 [14] $ 140 [12]
Investment owned, balance (in shares) 122 [14] 122 [12]
Investment, Identifier [Axis]: Forest Buyer, LLC | Class B LLC Units    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [10],[12] $ 61  
Fair value at ending balance $ 54 [8],[14] $ 61 [10],[12]
Investment owned, balance (in shares) 122 [8],[14] 122 [10],[12]
Investment, Identifier [Axis]: Forest Buyer, LLC | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [12],[15],[16] $ 6,054  
Fair value at ending balance $ 5,648 [14],[17],[18] $ 6,054 [12],[15],[16]
Basis spread on variable rate 5.00% [14],[17],[18] 5.00% [12],[15],[16]
Interest rate, cash 8.70% [14],[17],[18] 8.70% [12],[15],[16]
Investment, Identifier [Axis]: Forest Buyer, LLC | Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[12],[15],[16] $ (2)  
Fair value at ending balance $ (20) [14],[17],[18],[19] $ (2) [5],[12],[15],[16]
Basis spread on variable rate 5.00% [14],[17],[18],[19] 5.00% [5],[12],[15],[16]
Interest rate, cash 8.70% [14],[17],[18],[19] 8.70% [5],[12],[15],[16]
Investment, Identifier [Axis]: Forge Borrower, LLC | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [14],[17],[18],[19] $ 1,236  
Basis spread on variable rate [14],[17],[18],[19] 4.50%  
Interest rate, cash [14],[17],[18],[19] 8.20%  
Investment, Identifier [Axis]: Forge Borrower, LLC | Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [14],[17],[18],[19] $ (7)  
Basis spread on variable rate [14],[17],[18],[19] 4.50%  
Interest rate, cash [14],[17],[18],[19] 8.20%  
Investment, Identifier [Axis]: FragilePak LLC | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [12],[15],[16] $ 4,496  
Fair value at ending balance $ 4,473 [14],[17],[18] $ 4,496 [12],[15],[16]
Basis spread on variable rate 5.75% [14],[17],[18] 5.75% [12],[15],[16]
Interest rate, cash 9.60% [14],[17],[18] 9.60% [12],[15],[16]
Investment, Identifier [Axis]: FragilePak LLC | Partnership Units    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [10],[12] $ 666  
Fair value at ending balance $ 676 [8],[14] $ 666 [10],[12]
Investment owned, balance (in shares) 937.5 [8],[14] 937.5 [10],[12]
Investment, Identifier [Axis]: G 3 Chickadee Purchaser, LLC | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [14],[17],[18] $ 11,547  
Basis spread on variable rate [14],[17],[18] 5.75%  
Interest rate, cash [14],[17],[18] 9.40%  
Investment, Identifier [Axis]: G-3 Chickadee Purchaser, LLC | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [12],[15],[16] $ 11,667  
Fair value at ending balance [12],[15],[16]   $ 11,667
Basis spread on variable rate [12],[15],[16]   5.75%
Interest rate, cash [12],[15],[16]   9.60%
Investment, Identifier [Axis]: GB Eagle Buyer, Inc. | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [12],[15],[16] 8,382  
Fair value at ending balance $ 7,048 [14],[17],[18] $ 8,382 [12],[15],[16]
Basis spread on variable rate 4.75% [14],[17],[18] 4.50% [12],[15],[16]
Interest rate, cash 8.50% [14],[17],[18] 8.20% [12],[15],[16]
Investment, Identifier [Axis]: GB Eagle Buyer, Inc. | Partnership Units    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [10],[12] $ 2,025  
Fair value at ending balance $ 6,371 [8],[14] $ 2,025 [10],[12]
Investment owned, balance (in shares) 687 [8],[14] 687 [10],[12]
Investment, Identifier [Axis]: GB Eagle Buyer, Inc. | Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[12],[15],[16] $ (23)  
Fair value at ending balance $ 0 [14],[17],[18],[19] $ (23) [5],[12],[15],[16]
Basis spread on variable rate 4.75% [14],[17],[18],[19] 4.50% [5],[12],[15],[16]
Interest rate, cash 8.50% [14],[17],[18],[19] 8.20% [5],[12],[15],[16]
Investment, Identifier [Axis]: GCDL LLC | Common Stock    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [12] $ 355  
Fair value at ending balance $ 306 [14] $ 355 [12]
Investment owned, balance (in shares) 243,243.24 [14] 243,243.24 [12]
Investment, Identifier [Axis]: GCDL LLC | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[12],[15],[16] $ 501  
Fair value at ending balance $ 612 [14],[17],[18] $ 501 [5],[12],[15],[16]
Basis spread on variable rate 6.00% [14],[17],[18] 6.00% [5],[12],[15],[16]
Interest rate, cash 9.70% [14],[17],[18] 9.60% [5],[12],[15],[16]
Investment, Identifier [Axis]: GCDL LLC | Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[12],[15],[16] $ (1)  
Fair value at ending balance $ 0 [14],[17],[18],[19] $ (1) [5],[12],[15],[16]
Basis spread on variable rate 6.00% [14],[17],[18],[19] 6.00% [5],[12],[15],[16]
Interest rate, cash 9.70% [14],[17],[18],[19] 9.60% [5],[12],[15],[16]
Investment, Identifier [Axis]: GMES LLC | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[12],[15],[16] $ 7,609  
Fair value at ending balance $ 8,298 [14],[17],[18],[19] $ 7,609 [5],[12],[15],[16]
Basis spread on variable rate 5.25% [14],[17],[18],[19] 5.25% [5],[12],[15],[16]
Interest rate, cash 9.00% [14],[17],[18],[19] 8.90% [5],[12],[15],[16]
Investment, Identifier [Axis]: GMES LLC | Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[12],[15],[16] $ 90  
Fair value at ending balance $ 194 [14],[17],[18],[19] $ 90 [5],[12],[15],[16]
Basis spread on variable rate 5.25% [14],[17],[18],[19] 5.25% [5],[12],[15],[16]
Interest rate, cash 9.00% [14],[17],[18],[19] 8.90% [5],[12],[15],[16]
Investment, Identifier [Axis]: GMF Parent, Inc. | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[12],[15],[16] $ 2,200  
Fair value at ending balance $ 2,205 [14],[17],[18],[19] $ 2,200 [5],[12],[15],[16]
Basis spread on variable rate 4.50% [14],[17],[18],[19] 4.50% [5],[12],[15],[16]
Interest rate, cash 8.20% [14],[17],[18],[19] 8.20% [5],[12],[15],[16]
Investment, Identifier [Axis]: GMF Parent, Inc. | LLC Units    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [10],[12] $ 138  
Fair value at ending balance $ 113 [8],[14] $ 138 [10],[12]
Investment owned, balance (in shares) 138 [8],[14] 138 [10],[12]
Investment, Identifier [Axis]: GMF Parent, Inc. | Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[12],[15],[16] $ (5)  
Fair value at ending balance $ 39 [14],[17],[18],[19] $ (5) [5],[12],[15],[16]
Basis spread on variable rate 4.50% [14],[17],[18],[19] 4.50% [5],[12],[15],[16]
Interest rate, cash 8.20% [14],[17],[18],[19] 8.20% [5],[12],[15],[16]
Investment, Identifier [Axis]: GPNZ II GmbH | Common Stock    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[10],[12] $ 0  
Fair value at ending balance $ 0 [3],[8],[14] $ 0 [7],[10],[12]
Investment owned, balance (in shares) 5,785 [3],[8],[14] 5,785 [7],[10],[12]
Investment, Identifier [Axis]: GPNZ II GmbH | First Lien Senior Secured Term Loan 1    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[7],[12] $ 239  
Fair value at ending balance $ 0 [3],[14],[18],[25],[38] $ 239 [5],[7],[12]
Basis spread on variable rate [3],[14],[18],[25],[38] 6.00%  
Investment, interest rate, paid in kind 8.90% [3],[14],[18],[25],[38] 10.00% [5],[7],[12]
Investment, Identifier [Axis]: GPNZ II GmbH | First Lien Senior Secured Term Loan 2    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[12],[16],[24],[37] $ 0  
Fair value at ending balance $ 14 [3],[14],[19] $ 0 [7],[12],[16],[24],[37]
Basis spread on variable rate [7],[12],[16],[24],[37]   6.00%
Investment, interest rate, paid in kind 10.00% [3],[14],[19] 8.00% [7],[12],[16],[24],[37]
Investment, Identifier [Axis]: Global Academic Group Limited | First Lien Senior Secured Term Loan 1    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[12],[16],[34] $ 2,697  
Fair value at ending balance $ 2,802 [3],[14],[18],[35] $ 2,697 [7],[12],[16],[34]
Basis spread on variable rate 4.91% [3],[14],[18],[35] 4.91% [7],[12],[16],[34]
Interest rate, cash 9.20% [3],[14],[18],[35] 8.60% [7],[12],[16],[34]
Investment, Identifier [Axis]: Global Academic Group Limited | First Lien Senior Secured Term Loan 2    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[12],[16],[53] $ 632  
Fair value at ending balance $ 625 [3],[14],[18],[54] $ 632 [7],[12],[16],[53]
Basis spread on variable rate 4.91% [3],[14],[18],[54] 4.91% [7],[12],[16],[53]
Interest rate, cash 7.50% [3],[14],[18],[54] 7.50% [7],[12],[16],[53]
Investment, Identifier [Axis]: Gojo Industries, Inc. | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [12],[15],[16] $ 12,474  
Fair value at ending balance [12],[15],[16]   $ 12,474
Basis spread on variable rate [12],[15],[16]   8.75%
Interest rate, cash [12],[15],[16]   12.60%
Investment, Identifier [Axis]: Greenhill II BV | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[7],[12],[16],[20] 1,762  
Fair value at ending balance $ 1,711 [3],[14],[18],[19],[21] $ 1,762 [5],[7],[12],[16],[20]
Basis spread on variable rate 4.85% [3],[14],[18],[19],[21] 5.35% [5],[7],[12],[16],[20]
Interest rate, cash 7.10% [3],[14],[18],[19],[21] 7.40% [5],[7],[12],[16],[20]
Investment, Identifier [Axis]: Groupe Guemas | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[12],[16],[27] $ 5,434  
Fair value at ending balance $ 5,136 [3],[14],[18],[28] $ 5,434 [7],[12],[16],[27]
Basis spread on variable rate 6.75% [3],[14],[18],[28] 6.50% [7],[12],[16],[27]
Interest rate, cash 9.30% [3],[14],[18],[28] 8.80% [7],[12],[16],[27]
Investment, Identifier [Axis]: Groupe Product Life | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[7],[12],[16],[20] $ 447  
Fair value at ending balance $ 410 [3],[14],[18],[19],[21] $ 447 [5],[7],[12],[16],[20]
Basis spread on variable rate 5.75% [3],[14],[18],[19],[21] 6.00% [5],[7],[12],[16],[20]
Interest rate, cash 8.00% [3],[14],[18],[19],[21] 8.00% [5],[7],[12],[16],[20]
Investment, Identifier [Axis]: HEKA Invest | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[12],[16],[20] $ 5,501  
Fair value at ending balance $ 5,136 [3],[14],[18],[21] $ 5,501 [7],[12],[16],[20]
Basis spread on variable rate 6.20% [3],[14],[18],[21] 6.20% [7],[12],[16],[20]
Interest rate, cash 8.30% [3],[14],[18],[21] 8.20% [7],[12],[16],[20]
Investment, Identifier [Axis]: HS Advisory Buyer LLC | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[12],[15],[16] $ 2,231  
Fair value at ending balance $ 2,321 [14],[17],[18],[19] $ 2,231 [5],[12],[15],[16]
Basis spread on variable rate 4.75% [14],[17],[18],[19] 4.50% [5],[12],[15],[16]
Interest rate, cash 8.50% [14],[17],[18],[19] 8.20% [5],[12],[15],[16]
Investment, Identifier [Axis]: HS Advisory Buyer LLC | Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[12],[15],[16] $ (6)  
Fair value at ending balance $ 274 [14],[17],[18],[19] $ (6) [5],[12],[15],[16]
Basis spread on variable rate 4.75% [14],[17],[18],[19] 4.50% [5],[12],[15],[16]
Interest rate, cash 8.50% [14],[17],[18],[19] 8.20% [5],[12],[15],[16]
Investment, Identifier [Axis]: HSL Compliance | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[7],[12],[16],[30] $ 3,061  
Fair value at ending balance $ 3,360 [3],[14],[18],[19],[26] $ 3,061 [5],[7],[12],[16],[30]
Basis spread on variable rate 5.25% [3],[14],[18],[19],[26] 5.25% [5],[7],[12],[16],[30]
Interest rate, cash 9.00% [3],[14],[18],[19],[26] 9.00% [5],[7],[12],[16],[30]
Investment, Identifier [Axis]: HTI Technology & Industries | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[12],[15],[16] $ 10,394  
Fair value at ending balance $ 10,959 [14],[17],[18],[19] $ 10,394 [5],[12],[15],[16]
Basis spread on variable rate 8.50% [14],[17],[18],[19] 8.50% [5],[12],[15],[16]
Interest rate, cash 12.40% [14],[17],[18],[19] 12.50% [5],[12],[15],[16]
Investment, Identifier [Axis]: HTI Technology & Industries | Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[12],[15],[16] $ (72)  
Fair value at ending balance $ (8) [14],[17],[18],[19] $ (72) [5],[12],[15],[16]
Basis spread on variable rate 8.50% [14],[17],[18],[19] 8.50% [5],[12],[15],[16]
Interest rate, cash 12.40% [14],[17],[18],[19] 12.50% [5],[12],[15],[16]
Investment, Identifier [Axis]: HW Holdco, LLC (Hanley Wood LLC) | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [12],[15],[16] $ 10,132  
Fair value at ending balance $ 10,019 [14],[17],[18] $ 10,132 [12],[15],[16]
Basis spread on variable rate 5.75% [14],[17],[18] 5.75% [12],[15],[16]
Interest rate, cash 9.50% [14],[17],[18] 9.80% [12],[15],[16]
Investment, Identifier [Axis]: Haystack Holdings LLC | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[12],[16],[33] $ 6,566  
Fair value at ending balance $ 8,777 [14],[18],[19],[29] $ 6,566 [5],[12],[16],[33]
Basis spread on variable rate 4.75% [14],[18],[19],[29] 4.75% [5],[12],[16],[33]
Interest rate, cash 8.40% [14],[18],[19],[29] 8.40% [5],[12],[16],[33]
Investment, Identifier [Axis]: Haystack Holdings LLC | Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[12],[16],[33] $ (1)  
Fair value at ending balance $ (8) [14],[18],[19],[29] $ (1) [5],[12],[16],[33]
Basis spread on variable rate 4.75% [14],[18],[19],[29] 4.75% [5],[12],[16],[33]
Interest rate, cash 8.40% [14],[18],[19],[29] 8.40% [5],[12],[16],[33]
Investment, Identifier [Axis]: HeartHealth Bidco Pty Ltd | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[7],[12],[16],[34] $ 714  
Fair value at ending balance $ 870 [3],[14],[18],[19],[35] $ 714 [5],[7],[12],[16],[34]
Basis spread on variable rate 5.00% [3],[14],[18],[19],[35] 5.25% [5],[7],[12],[16],[34]
Interest rate, cash 9.50% [3],[14],[18],[19],[35] 8.90% [5],[7],[12],[16],[34]
Investment, Identifier [Axis]: Heartland Veterinary Partners, LLC | Subordinated Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [12] $ 14,690  
Fair value at ending balance $ 15,745 [14] $ 14,690 [12]
Investment, interest rate, paid in kind 11.00% [14] 11.00% [12]
Investment, Identifier [Axis]: Heavy Construction Systems Specialists, LLC | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [12],[15],[16] $ 7,147  
Fair value at ending balance $ 7,110 [14],[17],[18] $ 7,147 [12],[15],[16]
Basis spread on variable rate 6.75% [14],[17],[18] 4.75% [12],[15],[16]
Interest rate, cash 10.50% [14],[17],[18] 8.40% [12],[15],[16]
Investment, Identifier [Axis]: Heavy Construction Systems Specialists, LLC | Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[12],[15],[16] $ 0  
Fair value at ending balance $ 0 [14],[17],[18],[19] $ 0 [5],[12],[15],[16]
Basis spread on variable rate 6.75% [14],[17],[18],[19] 4.75% [5],[12],[15],[16]
Interest rate, cash 10.50% [14],[17],[18],[19] 8.40% [5],[12],[15],[16]
Investment, Identifier [Axis]: Heilbron (f/k/a Sucsez (Bolt Bidco B.V.)) | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[12],[16],[27] $ 3,521  
Fair value at ending balance $ 3,436 [3],[14],[18],[38] $ 3,521 [7],[12],[16],[27]
Basis spread on variable rate 4.75% [3],[14],[18],[38] 5.75% [7],[12],[16],[27]
Interest rate, cash 6.90% [3],[14],[18],[38] 7.80% [7],[12],[16],[27]
Investment, Identifier [Axis]: HemaSource, Inc. | Common Stock    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [10],[12] $ 141  
Fair value at ending balance $ 156 [8],[14] $ 141 [10],[12]
Investment owned, balance (in shares) 101,080 [8],[14] 101,080 [10],[12]
Investment, Identifier [Axis]: HemaSource, Inc. | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[12],[16],[23] $ 2,467  
Fair value at ending balance $ 2,616 [14],[18],[19],[22] $ 2,467 [5],[12],[16],[23]
Basis spread on variable rate 4.50% [14],[18],[19],[22] 4.50% [5],[12],[16],[23]
Interest rate, cash 8.10% [14],[18],[19],[22] 8.20% [5],[12],[16],[23]
Investment, Identifier [Axis]: HemaSource, Inc. | Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[12],[16],[23] $ (18)  
Fair value at ending balance $ 135 [14],[18],[19],[22] $ (18) [5],[12],[16],[23]
Basis spread on variable rate 4.50% [14],[18],[19],[22] 4.50% [5],[12],[16],[23]
Interest rate, cash 8.10% [14],[18],[19],[22] 8.20% [5],[12],[16],[23]
Investment, Identifier [Axis]: Herbalife Ltd. | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[16],[23] $ 3,209  
Fair value at ending balance [7],[16],[23]   $ 3,209
Basis spread on variable rate [7],[16],[23]   6.75%
Interest rate, cash [7],[16],[23]   10.50%
Investment, Identifier [Axis]: High Street Buyer Inc. | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[12],[15],[16] 188  
Fair value at ending balance $ 290 [14],[17],[18],[19] $ 188 [5],[12],[15],[16]
Basis spread on variable rate 4.25% [14],[17],[18],[19] 4.50% [5],[12],[15],[16]
Interest rate, cash 8.00% [14],[17],[18],[19] 8.20% [5],[12],[15],[16]
Investment, Identifier [Axis]: Home Care Assistance, LLC | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [12],[15],[16] $ 3,225  
Fair value at ending balance $ 3,160 [14],[17],[18] $ 3,225 [12],[15],[16]
Basis spread on variable rate 5.00% [14],[17],[18] 5.00% [12],[15],[16]
Investment, interest rate, paid in kind 1.00% [14],[17],[18] 1.00% [12],[15],[16]
Interest rate, cash 8.70% [14],[17],[18] 8.90% [12],[15],[16]
Investment, Identifier [Axis]: HomeX Services Group LLC | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [12],[16] $ 1,899  
Fair value at ending balance $ 2,070 [14],[18],[22] $ 1,899 [12],[16]
Basis spread on variable rate 4.50% [14],[18],[22] 4.50% [12],[16]
Interest rate, cash 8.10% [14],[18],[22] 8.20% [12],[16]
Investment, Identifier [Axis]: HomeX Services Group LLC | Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[12],[16],[23] $ 32  
Fair value at ending balance $ 64 [14],[18],[19],[22] $ 32 [5],[12],[16],[23]
Basis spread on variable rate 4.50% [14],[18],[19],[22] 4.50% [5],[12],[16],[23]
Interest rate, cash 8.10% [14],[18],[19],[22] 8.20% [5],[12],[16],[23]
Investment, Identifier [Axis]: Honour Lane Logistics Holdings Limited | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[12],[15],[16] $ 6,667  
Fair value at ending balance $ 6,393 [3],[14],[17],[18] $ 6,667 [7],[12],[15],[16]
Basis spread on variable rate 5.35% [3],[14],[17],[18] 4.85% [7],[12],[15],[16]
Interest rate, cash 9.00% [3],[14],[17],[18] 8.70% [7],[12],[15],[16]
Investment, Identifier [Axis]: Hydratech Holdings, Inc. | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[12],[15],[16] $ 8,922  
Fair value at ending balance $ 8,895 [14],[17],[18],[19] $ 8,922 [5],[12],[15],[16]
Basis spread on variable rate 5.25% [14],[17],[18],[19] 5.25% [5],[12],[15],[16]
Interest rate, cash 9.00% [14],[17],[18],[19] 8.90% [5],[12],[15],[16]
Investment, Identifier [Axis]: Hydratech Holdings, Inc. | Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[12],[15],[16] $ 671  
Fair value at ending balance $ 794 [14],[17],[18],[19] $ 671 [5],[12],[15],[16]
Basis spread on variable rate 5.25% [14],[17],[18],[19] 5.25% [5],[12],[15],[16]
Interest rate, cash 9.00% [14],[17],[18],[19] 8.90% [5],[12],[15],[16]
Investment, Identifier [Axis]: ICREDITWORKS LLC | Preferred Stock    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [12] $ 10,842  
Fair value at ending balance $ 11,504 [14] $ 10,842 [12]
Investment, interest rate, paid in kind 17.50% [14] 7.50% [12]
Investment owned, balance (in shares) 59,462.7 [14] 59,462.7 [12]
Interest rate, cash [12]   10.00%
Investment, Identifier [Axis]: ICREDITWORKS LLC | Warrants    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [10],[12] $ 0  
Fair value at ending balance $ 0 [8],[14] $ 0 [10],[12]
Investment owned, balance (in shares) 23,692.2 [8],[14] 23,692.2 [10],[12]
Investment, Identifier [Axis]: IM Square | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[12],[16],[20] $ 2,916  
Fair value at ending balance [7],[12],[16],[20]   $ 2,916
Basis spread on variable rate [7],[12],[16],[20]   5.55%
Interest rate, cash [7],[12],[16],[20]   7.60%
Investment, Identifier [Axis]: IM Square | First Lien Senior Secured Term Loan 1    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [3],[14],[18],[21] $ 1,811  
Basis spread on variable rate [3],[14],[18],[21] 6.00%  
Interest rate, cash [3],[14],[18],[21] 8.30%  
Investment, Identifier [Axis]: IM Square | First Lien Senior Secured Term Loan 2    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [3],[14],[18],[19],[21] $ (51)  
Basis spread on variable rate [3],[14],[18],[19],[21] 6.00%  
Interest rate, cash [3],[14],[18],[19],[21] 8.30%  
Investment, Identifier [Axis]: IMS Services Enterprises, LLC | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [14],[18],[19],[22] $ 7,563  
Basis spread on variable rate [14],[18],[19],[22] 4.75%  
Interest rate, cash [14],[18],[19],[22] 8.40%  
Investment, Identifier [Axis]: IMS Services Enterprises, LLC | LLC Units    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [8],[14] $ 295  
Investment owned, balance (in shares) [8],[14] 294  
Investment, Identifier [Axis]: IMS Services Enterprises, LLC | Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [14],[18],[19],[22] $ 104  
Basis spread on variable rate [14],[18],[19],[22] 4.75%  
Interest rate, cash [14],[18],[19],[22] 8.40%  
Investment, Identifier [Axis]: ITI Intermodal, Inc. | Common Stock    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [10],[12] $ 961  
Fair value at ending balance $ 947 [8],[14] $ 961 [10],[12]
Investment owned, balance (in shares) 7,500.4 [8],[14] 7,500.4 [10],[12]
Investment, Identifier [Axis]: ITI Intermodal, Inc. | First Lien Senior Secured Term Loan 1    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [12],[15],[16] $ 11,955  
Fair value at ending balance $ 11,801 [14],[17],[18] $ 11,955 [12],[15],[16]
Basis spread on variable rate 6.50% [14],[17],[18] 6.50% [12],[15],[16]
Interest rate, cash 10.30% [14],[17],[18] 10.20% [12],[15],[16]
Investment, Identifier [Axis]: ITI Intermodal, Inc. | First Lien Senior Secured Term Loan 2    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [12],[15],[16] $ 793  
Fair value at ending balance $ 782 [14],[17],[18] $ 793 [12],[15],[16]
Basis spread on variable rate 6.25% [14],[17],[18] 6.25% [12],[15],[16]
Interest rate, cash 10.10% [14],[17],[18] 10.00% [12],[15],[16]
Investment, Identifier [Axis]: ITI Intermodal, Inc. | Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[12],[15],[16] $ 226  
Fair value at ending balance $ 226 [14],[17],[18],[19] $ 226 [5],[12],[15],[16]
Basis spread on variable rate 6.50% [14],[17],[18],[19] 6.50% [5],[12],[15],[16]
Interest rate, cash 10.30% [14],[17],[18],[19] 10.20% [5],[12],[15],[16]
Investment, Identifier [Axis]: Ice House America, L.L.C. | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[12],[15],[16] $ 4,312  
Fair value at ending balance $ 4,409 [14],[17],[18],[19] $ 4,312 [5],[12],[15],[16]
Basis spread on variable rate 6.00% [14],[17],[18],[19] 6.00% [5],[12],[15],[16]
Interest rate, cash 9.70% [14],[17],[18],[19] 9.90% [5],[12],[15],[16]
Investment, Identifier [Axis]: Ice House America, L.L.C. | LLC Units    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [10],[12] $ 174  
Fair value at ending balance $ 195 [8],[14] $ 174 [10],[12]
Investment owned, balance (in shares) 2,892.5 [8],[14] 2,893 [10],[12]
Investment, Identifier [Axis]: Ice House America, L.L.C. | Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[12],[15],[16] $ 356  
Fair value at ending balance $ 364 [14],[17],[18],[19] $ 356 [5],[12],[15],[16]
Basis spread on variable rate 6.00% [14],[17],[18],[19] 6.00% [5],[12],[15],[16]
Interest rate, cash 9.70% [14],[17],[18],[19] 9.90% [5],[12],[15],[16]
Investment, Identifier [Axis]: Infoniqa Holdings GmbH | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[12],[16],[27] $ 3,086  
Fair value at ending balance $ 2,962 [3],[14],[18],[28] $ 3,086 [7],[12],[16],[27]
Basis spread on variable rate 4.75% [3],[14],[18],[28] 4.75% [7],[12],[16],[27]
Interest rate, cash 7.00% [3],[14],[18],[28] 6.80% [7],[12],[16],[27]
Investment, Identifier [Axis]: Innovad Group II BV | First Lien Senior Secured Term Loan 1    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[12],[16],[20] $ 7,239  
Fair value at ending balance [7],[12],[16],[20]   $ 7,239
Basis spread on variable rate [7],[12],[16],[20]   4.75%
Interest rate, cash [7],[12],[16],[20]   6.70%
Investment, Identifier [Axis]: Innovad Group II BV | First Lien Senior Secured Term Loan 2    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[12],[16],[55] 1,157  
Fair value at ending balance [7],[12],[16],[55]   $ 1,157
Basis spread on variable rate [7],[12],[16],[55]   4.75%
Interest rate, cash [7],[12],[16],[55]   4.80%
Investment, Identifier [Axis]: Integrated Precision Systems, LLC | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [14],[18],[19],[22] $ 6,826  
Basis spread on variable rate [14],[18],[19],[22] 4.75%  
Interest rate, cash [14],[18],[19],[22] 8.40%  
Investment, Identifier [Axis]: Integrated Precision Systems, LLC | Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [14],[18],[19],[22] $ 358  
Basis spread on variable rate [14],[18],[19],[22] 4.75%  
Interest rate, cash [14],[18],[19],[22] 8.40%  
Investment, Identifier [Axis]: International Fleet Financing No.2 B.V. | Class C Senior Secured Note    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[7],[12] $ 8,275  
Fair value at ending balance [5],[7],[12]   $ 8,275
Interest rate, cash [5],[7],[12]   10.50%
Investment, Identifier [Axis]: International Fleet Financing No.2 B.V. | Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [3],[14],[19] $ 8,813  
Interest rate, cash [3],[14],[19] 10.50%  
Investment, Identifier [Axis]: Interstellar Group B.V. | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[7],[12],[16],[20] $ 1,637  
Fair value at ending balance $ 1,675 [3],[14],[18],[19],[21] $ 1,637 [5],[7],[12],[16],[20]
Basis spread on variable rate 6.20% [3],[14],[18],[19],[21] 6.25% [5],[7],[12],[16],[20]
Interest rate, cash 8.40% [3],[14],[18],[19],[21] 8.30% [5],[7],[12],[16],[20]
Investment, Identifier [Axis]: InvoCare Limited | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[7],[12],[16],[34] $ 2,159  
Fair value at ending balance $ 2,233 [3],[14],[18],[19],[35] $ 2,159 [5],[7],[12],[16],[34]
Basis spread on variable rate 5.00% [3],[14],[18],[19],[35] 5.00% [5],[7],[12],[16],[34]
Interest rate, cash 9.50% [3],[14],[18],[19],[35] 8.70% [5],[7],[12],[16],[34]
Investment, Identifier [Axis]: Isolstar Holding NV (IPCOM) | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[12],[16],[20] $ 5,788  
Fair value at ending balance $ 5,661 [3],[14],[18],[21] $ 5,788 [7],[12],[16],[20]
Basis spread on variable rate 5.50% [3],[14],[18],[21] 5.25% [7],[12],[16],[20]
Interest rate, cash 7.50% [3],[14],[18],[21] 7.30% [7],[12],[16],[20]
Investment, Identifier [Axis]: Jade Bidco Limited (Jane's) | First Lien Senior Secured Term Loan 1    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[12],[16],[27] $ 1,263  
Fair value at ending balance [7],[12],[16],[27]   $ 1,263
Basis spread on variable rate [7],[12],[16],[27]   5.25%
Interest rate, cash [7],[12],[16],[27]   7.40%
Investment, Identifier [Axis]: Jade Bidco Limited (Jane's) | First Lien Senior Secured Term Loan 2    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[12],[16],[33] 6,526  
Fair value at ending balance [7],[12],[16],[33]   $ 6,526
Basis spread on variable rate [7],[12],[16],[33]   5.25%
Interest rate, cash [7],[12],[16],[33]   9.30%
Investment, Identifier [Axis]: Jocassee Partners LLC | 9.1% Member Interest    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [4],[5],[6],[7] 37,986  
Gross Additions [40] 0  
Gross Reductions [41] 0  
Amount of Realized Gain (Loss) 0  
Amount of Unrealized Gain (Loss) (4,806)  
Fair value at ending balance 33,180 [1],[2],[3] $ 37,986 [4],[5],[6],[7]
Amount of Interest or Dividends Credited to Income [42] 5,709  
Investment, Identifier [Axis]: Jocassee Partners LLC, Member Interest    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance 37,986 40,761
Gross Additions [44]   0
Gross Reductions [45]   0
Amount of Realized Gain (Loss)   0
Amount of Unrealized Gain (Loss)   (2,775)
Fair value at ending balance   37,986
Amount of Interest or Dividends Credited to Income [46]   5,709
Investment, Identifier [Axis]: Jon Bidco Limited | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[7],[12],[16],[53] 1,533  
Fair value at ending balance $ 1,965 [3],[14],[18],[19],[54] $ 1,533 [5],[7],[12],[16],[53]
Basis spread on variable rate 4.00% [3],[14],[18],[19],[54] 4.00% [5],[7],[12],[16],[53]
Interest rate, cash 6.80% [3],[14],[18],[19],[54] 6.50% [5],[7],[12],[16],[53]
Investment, Identifier [Axis]: KAMC Holdings Inc. | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [12],[15],[16] $ 5,364  
Fair value at ending balance $ 5,202 [14],[17],[18] $ 5,364 [12],[15],[16]
Basis spread on variable rate 5.25% [14],[17],[18] 5.25% [12],[15],[16]
Interest rate, cash 8.90% [14],[17],[18] 9.10% [12],[15],[16]
Investment, Identifier [Axis]: KAMC Holdings Inc. | Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[12],[15],[16] $ 157  
Fair value at ending balance $ 140 [14],[17],[18],[19] $ 157 [5],[12],[15],[16]
Basis spread on variable rate 5.25% [14],[17],[18],[19] 5.25% [5],[12],[15],[16]
Interest rate, cash 8.90% [14],[17],[18],[19] 9.10% [5],[12],[15],[16]
Investment, Identifier [Axis]: Kanawha Scales & Systems, LLC | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[12],[15],[16] $ 415  
Fair value at ending balance $ 445 [14],[17],[18],[19] $ 415 [5],[12],[15],[16]
Basis spread on variable rate 4.25% [14],[17],[18],[19] 4.25% [5],[12],[15],[16]
Interest rate, cash 7.90% [14],[17],[18],[19] 8.10% [5],[12],[15],[16]
Investment, Identifier [Axis]: Kanawha Scales & Systems, LLC | Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[12],[15],[16] $ 24  
Fair value at ending balance $ 34 [14],[17],[18],[19] $ 24 [5],[12],[15],[16]
Basis spread on variable rate 4.25% [14],[17],[18],[19] 4.25% [5],[12],[15],[16]
Interest rate, cash 7.90% [14],[17],[18],[19] 8.10% [5],[12],[15],[16]
Investment, Identifier [Axis]: Keystone Bidco B.V. | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[7],[12],[16],[27] $ 931  
Fair value at ending balance $ 898 [3],[14],[18],[19],[28] $ 931 [5],[7],[12],[16],[27]
Basis spread on variable rate 5.25% [3],[14],[18],[19],[28] 5.25% [5],[7],[12],[16],[27]
Interest rate, cash 7.80% [3],[14],[18],[19],[28] 7.40% [5],[7],[12],[16],[27]
Investment, Identifier [Axis]: Keystone Bidco B.V. | Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[7],[12],[16],[27] $ 11  
Fair value at ending balance [5],[7],[12],[16],[27]   $ 11
Basis spread on variable rate [5],[7],[12],[16],[27]   5.25%
Interest rate, cash [5],[7],[12],[16],[27]   7.40%
Investment, Identifier [Axis]: Kid Distro Holdings, LLC | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [12],[16],[33] 13,020  
Fair value at ending balance $ 12,952 [14],[17],[18] $ 13,020 [12],[16],[33]
Basis spread on variable rate 4.25% [14],[17],[18] 4.75% [12],[16],[33]
Interest rate, cash 7.90% [14],[17],[18] 9.20% [12],[16],[33]
Investment, Identifier [Axis]: Kid Distro Holdings, LLC | LLC Units    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [10],[12] $ 791  
Fair value at ending balance $ 861 [8],[14] $ 791 [10],[12]
Investment owned, balance (in shares) 637,677.11 [8],[14] 637,677.11 [10],[12]
Investment, Identifier [Axis]: Kite Topco Ltd | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [3],[14],[18],[19],[32] $ 2,667  
Basis spread on variable rate [3],[14],[18],[19],[32] 5.25%  
Interest rate, cash [3],[14],[18],[19],[32] 9.00%  
Investment, Identifier [Axis]: L.A. Specialty Produce Co., LLC | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [14],[17],[18],[19] $ 6,258  
Basis spread on variable rate [14],[17],[18],[19] 4.50%  
Interest rate, cash [14],[17],[18],[19] 8.20%  
Investment, Identifier [Axis]: L.A. Specialty Produce Co., LLC | Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [14],[17],[18],[19] $ (10)  
Basis spread on variable rate [14],[17],[18],[19] 4.50%  
Interest rate, cash [14],[17],[18],[19] 8.20%  
Investment, Identifier [Axis]: LHS Borrower, LLC | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [12],[16],[23] $ 9,019  
Fair value at ending balance $ 8,837 [14],[18],[22] $ 9,019 [12],[16],[23]
Basis spread on variable rate 5.25% [14],[18],[22] 5.25% [12],[16],[23]
Interest rate, cash 8.90% [14],[18],[22] 9.20% [12],[16],[23]
Investment, Identifier [Axis]: LHS Borrower, LLC | Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[12],[16],[23] $ 88  
Fair value at ending balance $ 193 [14],[18],[19],[22] $ 88 [5],[12],[16],[23]
Basis spread on variable rate 5.25% [14],[18],[19],[22] 5.25% [5],[12],[16],[23]
Interest rate, cash 8.90% [14],[18],[19],[22] 9.20% [5],[12],[16],[23]
Investment, Identifier [Axis]: Lambir Bidco Limited | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[7],[12],[16],[27] $ 2,327  
Fair value at ending balance [5],[7],[12],[16],[27]   $ 2,327
Basis spread on variable rate [5],[7],[12],[16],[27]   6.00%
Interest rate, cash [5],[7],[12],[16],[27]   8.10%
Investment, Identifier [Axis]: Lambir Bidco Limited | First Lien Senior Secured Term Loan 1    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [3],[14],[18],[21] $ 382  
Basis spread on variable rate [3],[14],[18],[21] 6.25%  
Interest rate, cash [3],[14],[18],[21] 8.50%  
Investment, Identifier [Axis]: Lambir Bidco Limited | First Lien Senior Secured Term Loan 2    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [3],[14],[18],[28] $ 1,849  
Basis spread on variable rate [3],[14],[18],[28] 6.50%  
Interest rate, cash [3],[14],[18],[28] 9.10%  
Investment, Identifier [Axis]: Lambir Bidco Limited | Second Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[12] $ 2,164  
Fair value at ending balance $ 2,176 [3],[14] $ 2,164 [7],[12]
Investment, interest rate, paid in kind 12.00% [3],[14] 12.00% [7],[12]
Investment, Identifier [Axis]: Lattice Group Holdings Bidco Limited | First Lien Senior Secured Term Loan 1    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[7],[12],[16],[33] $ 731  
Fair value at ending balance $ 680 [3],[14],[18],[19],[29] $ 731 [5],[7],[12],[16],[33]
Basis spread on variable rate 5.25% [3],[14],[18],[19],[29] 5.50% [5],[7],[12],[16],[33]
Interest rate, cash 8.90% [3],[14],[18],[19],[29] 9.50% [5],[7],[12],[16],[33]
Investment, Identifier [Axis]: Lattice Group Holdings Bidco Limited | First Lien Senior Secured Term Loan 2    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[12],[16],[31] $ 154  
Fair value at ending balance $ 205 [3],[14],[18],[32] $ 154 [7],[12],[16],[31]
Basis spread on variable rate 5.75% [3],[14],[18],[32] 5.50% [7],[12],[16],[31]
Interest rate, cash 9.50% [3],[14],[18],[32] 9.50% [7],[12],[16],[31]
Investment, Identifier [Axis]: Lattice Group Holdings Bidco Limited | Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[7],[12],[16],[33] $ 18  
Fair value at ending balance $ 34 [3],[14],[18],[29] $ 18 [5],[7],[12],[16],[33]
Basis spread on variable rate 5.25% [3],[14],[18],[29] 5.50% [5],[7],[12],[16],[33]
Interest rate, cash 8.90% [3],[14],[18],[29] 9.50% [5],[7],[12],[16],[33]
Investment, Identifier [Axis]: LeadsOnline, LLC | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [12],[15],[16] $ 9,915  
Fair value at ending balance $ 9,868 [14],[17],[18] $ 9,915 [12],[15],[16]
Basis spread on variable rate 4.50% [14],[17],[18] 4.50% [12],[15],[16]
Interest rate, cash 8.20% [14],[17],[18] 8.20% [12],[15],[16]
Investment, Identifier [Axis]: LeadsOnline, LLC | LLC Units    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [12] $ 216  
Fair value at ending balance $ 177 [14] $ 216 [12]
Investment owned, balance (in shares) 81,739 [14] 81,739 [12]
Investment, Identifier [Axis]: LeadsOnline, LLC | Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[12],[15],[16] $ (13)  
Fair value at ending balance $ (12) [14],[17],[18],[19] $ (13) [5],[12],[15],[16]
Basis spread on variable rate 4.50% [14],[17],[18],[19] 4.50% [5],[12],[15],[16]
Interest rate, cash 8.20% [14],[17],[18],[19] 8.20% [5],[12],[15],[16]
Investment, Identifier [Axis]: Lido Purchaser, Inc. | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [14],[17],[18],[19] $ 4,240  
Basis spread on variable rate [14],[17],[18],[19] 4.75%  
Interest rate, cash [14],[17],[18],[19] 8.40%  
Investment, Identifier [Axis]: Lifestyle Intermediate II, LLC | Class A Common Units    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [9],[10],[12] $ 0  
Fair value at ending balance $ 0 [8],[14],[56] $ 0 [9],[10],[12]
Investment owned, balance (in shares) 16,173 [8],[14],[56] 16,173 [9],[10],[12]
Investment, Identifier [Axis]: Lifestyle Intermediate II, LLC | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [9],[12],[15],[16] $ 2,094  
Fair value at ending balance $ 1,812 [14],[17],[18],[56] $ 2,094 [9],[12],[15],[16]
Basis spread on variable rate 7.00% [14],[17],[18],[56] 7.00% [9],[12],[15],[16]
Interest rate, cash 11.00% [14],[17],[18],[56] 10.90% [9],[12],[15],[16]
Investment, Identifier [Axis]: Lighthouse Finco SARL | First Lien Senior Secured Term Loan 1    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [3],[14],[18],[21] $ 699  
Basis spread on variable rate [3],[14],[18],[21] 4.75%  
Interest rate, cash [3],[14],[18],[21] 6.90%  
Investment, Identifier [Axis]: Lighthouse Finco SARL | First Lien Senior Secured Term Loan 2    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [3],[14],[18],[19],[26] $ 1,632  
Basis spread on variable rate [3],[14],[18],[19],[26] 4.75%  
Interest rate, cash [3],[14],[18],[19],[26] 8.50%  
Investment, Identifier [Axis]: Lockmasters Security Intermediate, Inc. | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[12],[15],[16] $ 3,199  
Fair value at ending balance $ 3,215 [14],[17],[18],[19] $ 3,199 [5],[12],[15],[16]
Basis spread on variable rate 5.00% [14],[17],[18],[19] 5.00% [5],[12],[15],[16]
Interest rate, cash 8.70% [14],[17],[18],[19] 8.60% [5],[12],[15],[16]
Investment, Identifier [Axis]: Lockmasters Security Intermediate, Inc. | Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[12],[15],[16] $ (5)  
Fair value at ending balance $ (2) [14],[17],[18],[19] $ (5) [5],[12],[15],[16]
Basis spread on variable rate 5.00% [14],[17],[18],[19] 5.00% [5],[12],[15],[16]
Interest rate, cash 8.70% [14],[17],[18],[19] 8.60% [5],[12],[15],[16]
Investment, Identifier [Axis]: London Buyer, LLC | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [14],[17],[18],[19] $ 11,360  
Basis spread on variable rate [14],[17],[18],[19] 5.00%  
Interest rate, cash [14],[17],[18],[19] 8.70%  
Investment, Identifier [Axis]: London Buyer, LLC | Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [14],[17],[18],[19] $ (22)  
Basis spread on variable rate [14],[17],[18],[19] 5.00%  
Interest rate, cash [14],[17],[18],[19] 8.70%  
Investment, Identifier [Axis]: Long Term Care Group, Inc. | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [12],[15],[16] $ 8,464  
Fair value at ending balance $ 8,268 [14],[17],[18] $ 8,464 [12],[15],[16]
Basis spread on variable rate 6.00% [14],[17],[18] 6.00% [12],[15],[16]
Interest rate, cash 9.90% [14],[17],[18] 10.10% [12],[15],[16]
Investment, Identifier [Axis]: M-Personal Protection Management GmbH | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[12],[16],[20] $ 4,139  
Fair value at ending balance $ 4,029 [3],[14],[18],[21] $ 4,139 [7],[12],[16],[20]
Basis spread on variable rate 5.00% [3],[14],[18],[21] 5.00% [7],[12],[16],[20]
Interest rate, cash 7.30% [3],[14],[18],[21] 7.00% [7],[12],[16],[20]
Investment, Identifier [Axis]: MB Purchaser, LLC | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[12],[16],[23] $ 3,771  
Fair value at ending balance $ 3,763 [14],[18],[19],[22] $ 3,771 [5],[12],[16],[23]
Basis spread on variable rate 4.75% [14],[18],[19],[22] 4.75% [5],[12],[16],[23]
Interest rate, cash 8.40% [14],[18],[19],[22] 8.50% [5],[12],[16],[23]
Investment, Identifier [Axis]: MB Purchaser, LLC | LLC Units    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [10],[12] $ 78  
Fair value at ending balance $ 85 [8],[14] $ 78 [10],[12]
Investment owned, balance (in shares) 66 [8],[14] 66 [10],[12]
Investment, Identifier [Axis]: MB Purchaser, LLC | Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[12],[16],[23] $ (8)  
Fair value at ending balance $ (6) [14],[18],[19],[22] $ (8) [5],[12],[16],[23]
Basis spread on variable rate 4.75% [14],[18],[19],[22] 4.75% [5],[12],[16],[23]
Interest rate, cash 8.40% [14],[18],[19],[22] 8.50% [5],[12],[16],[23]
Investment, Identifier [Axis]: MC Group Ventures Corporation | First Lien Senior Secured Term Loan 1    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[12],[15],[16] $ 4,829  
Fair value at ending balance $ 5,296 [14],[17],[18] $ 4,829 [5],[12],[15],[16]
Basis spread on variable rate 5.25% [14],[17],[18] 5.25% [5],[12],[15],[16]
Interest rate, cash 9.00% [14],[17],[18] 9.20% [5],[12],[15],[16]
Investment, Identifier [Axis]: MC Group Ventures Corporation | First Lien Senior Secured Term Loan 2    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[12],[15],[16] $ 4,236  
Fair value at ending balance $ 4,025 [14],[17],[18] $ 4,236 [5],[12],[15],[16]
Basis spread on variable rate 5.50% [14],[17],[18] 5.50% [5],[12],[15],[16]
Interest rate, cash 9.30% [14],[17],[18] 9.40% [5],[12],[15],[16]
Investment, Identifier [Axis]: MC Group Ventures Corporation | Partnership Units    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [10],[12] $ 706  
Fair value at ending balance $ 435 [8],[14] $ 706 [10],[12]
Investment owned, balance (in shares) 746.66 [8],[14] 746.66 [10],[12]
Investment, Identifier [Axis]: MIV Buyer, LLC | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[12],[15],[16] $ 3,024  
Fair value at ending balance $ 3,279 [14],[17],[18],[19] $ 3,024 [5],[12],[15],[16]
Basis spread on variable rate 4.75% [14],[17],[18],[19] 4.75% [5],[12],[15],[16]
Interest rate, cash 8.50% [14],[17],[18],[19] 8.40% [5],[12],[15],[16]
Investment, Identifier [Axis]: MIV Buyer, LLC | LLC Units    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [10],[12] $ 102  
Fair value at ending balance $ 96 [8],[14] $ 102 [10],[12]
Investment owned, balance (in shares) 1,007.4 [8],[14] 1,007.4 [10],[12]
Investment, Identifier [Axis]: MIV Buyer, LLC | Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[12],[15],[16] $ 174  
Fair value at ending balance $ (5) [14],[17],[18],[19] $ 174 [5],[12],[15],[16]
Basis spread on variable rate 4.75% [14],[17],[18],[19] 4.75% [5],[12],[15],[16]
Interest rate, cash 8.50% [14],[17],[18],[19] 8.40% [5],[12],[15],[16]
Investment, Identifier [Axis]: MNS Buyer, Inc. | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [12],[16],[23] $ 268  
Fair value at ending balance [12],[16],[23]   $ 268
Basis spread on variable rate [12],[16],[23]   5.00%
Interest rate, cash [12],[16],[23]   8.80%
Investment, Identifier [Axis]: MNS Buyer, Inc. | Partnership Units    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [10],[12] 186  
Fair value at ending balance [10],[12]   $ 186
Investment owned, balance (in shares) [10],[12]   76,923
Investment, Identifier [Axis]: MSI Express Inc. | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [12],[16],[23] 2,205  
Fair value at ending balance $ 2,135 [14],[18],[22] $ 2,205 [12],[16],[23]
Basis spread on variable rate 5.00% [14],[18],[22] 4.75% [12],[16],[23]
Interest rate, cash 8.70% [14],[18],[22] 8.50% [12],[16],[23]
Investment, Identifier [Axis]: MSI Express Inc. | Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[12],[15],[16] $ 1,291  
Fair value at ending balance $ 1,264 [14],[17],[18],[19] $ 1,291 [5],[12],[15],[16]
Basis spread on variable rate 3.75% [14],[17],[18],[19] 3.75% [5],[12],[15],[16]
Interest rate, cash 7.50% [14],[17],[18],[19] 7.40% [5],[12],[15],[16]
Investment, Identifier [Axis]: MVC Automotive Group GmbH | Common Equity Interest    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance $ 14,143 [7],[10],[12],[57],[58] $ 13,741
Gross Additions 0 [59] 4,000 [48]
Gross Reductions 0 [60] 0 [49]
Amount of Realized Gain (Loss) 0 0
Amount of Unrealized Gain (Loss) (5,696) (3,598)
Fair value at ending balance 8,447 [3],[8],[14] 14,143 [7],[10],[12],[57],[58]
Amount of Interest or Dividends Credited to Income $ 0 [61] $ 0 [50]
Investment owned, balance (in shares) 25,404 [3],[8],[14] 18,000 [7],[10],[12],[57],[58]
Investment, Identifier [Axis]: MVC Automotive Group GmbH | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance $ 0 $ 0
Gross Additions [48]   2,338
Gross Reductions [49]   (2,341)
Amount of Realized Gain (Loss)   3
Amount of Unrealized Gain (Loss)   0
Fair value at ending balance   0
Amount of Interest or Dividends Credited to Income [50]   $ 85
Interest rate, cash   7.00%
Investment, Identifier [Axis]: MVC Automotive Group GmbH | First Lien Senior Secured Term Loan 1    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance 0  
Gross Additions [59] 3,100  
Gross Reductions [60] 0  
Amount of Realized Gain (Loss) 0  
Amount of Unrealized Gain (Loss) (13)  
Fair value at ending balance 3,087 [3],[14],[62] $ 0
Amount of Interest or Dividends Credited to Income [61] $ 27  
Interest rate, cash [3],[14],[62] 7.70%  
Investment, Identifier [Axis]: MVC Automotive Group GmbH | First Lien Senior Secured Term Loan 2    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance $ 0  
Gross Additions [59] 5,582  
Gross Reductions [60] (3,733)  
Amount of Realized Gain (Loss) (63)  
Amount of Unrealized Gain (Loss) (70)  
Fair value at ending balance 1,716 [3],[14],[18],[21],[62] 0
Amount of Interest or Dividends Credited to Income [61] $ 155  
Basis spread on variable rate [3],[14],[18],[21],[62] 7.65%  
Interest rate, cash [3],[14],[18],[21],[62] 9.90%  
Investment, Identifier [Axis]: MVC Private Equity Fund LP | General Partnership Interest(1,831.4 units)    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance $ 0 0
Gross Additions [48]   0
Gross Reductions [49]   0
Amount of Realized Gain (Loss)   (183)
Amount of Unrealized Gain (Loss)   183
Fair value at ending balance   0
Amount of Interest or Dividends Credited to Income [50]   $ 0
Investment owned, balance (in shares)   1,831.4
Investment, Identifier [Axis]: MVC Private Equity Fund LP | Limited Partnership Interest (71,790.4 units)    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance 0 $ 11
Gross Additions [48]   0
Gross Reductions [49]   (116)
Amount of Realized Gain (Loss)   (7,166)
Amount of Unrealized Gain (Loss)   7,271
Fair value at ending balance   0
Amount of Interest or Dividends Credited to Income [50]   $ 0
Investment owned, balance (in shares)   71,790.4
Investment, Identifier [Axis]: Magnetite XIX, Limited | Subordinated Notes    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[15],[16] 5,043  
Fair value at ending balance $ 4,766 [3],[17],[18] $ 5,043 [7],[15],[16]
Basis spread on variable rate 8.00% [3],[17],[18] 8.00% [7],[15],[16]
Interest rate, cash 11.70% [3],[17],[18] 11.90% [7],[15],[16]
Investment, Identifier [Axis]: Maia Bidco Limited | First Lien Senior Secured Term Loan 1    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[12],[15],[16] $ 2,464  
Fair value at ending balance $ 2,473 [3],[14],[17],[18] $ 2,464 [7],[12],[15],[16]
Basis spread on variable rate 5.25% [3],[14],[17],[18] 5.25% [7],[12],[15],[16]
Interest rate, cash 8.90% [3],[14],[17],[18] 9.00% [7],[12],[15],[16]
Investment, Identifier [Axis]: Maia Bidco Limited | First Lien Senior Secured Term Loan 2    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[7],[12],[16],[30] $ 846  
Fair value at ending balance $ 831 [3],[14],[18],[19],[26] $ 846 [5],[7],[12],[16],[30]
Basis spread on variable rate 5.25% [3],[14],[18],[19],[26] 5.25% [5],[7],[12],[16],[30]
Interest rate, cash 9.00% [3],[14],[18],[19],[26] 9.20% [5],[7],[12],[16],[30]
Investment, Identifier [Axis]: Maia Bidco Limited | Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[7],[12],[16],[30] $ 0  
Fair value at ending balance $ (5) [3],[14],[18],[19],[26] $ 0 [5],[7],[12],[16],[30]
Basis spread on variable rate 5.25% [3],[14],[18],[19],[26] 5.25% [5],[7],[12],[16],[30]
Interest rate, cash 9.00% [3],[14],[18],[19],[26] 9.20% [5],[7],[12],[16],[30]
Investment, Identifier [Axis]: Main Line Commercial Pools LLC | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [14],[17],[18],[19] $ 1,992  
Basis spread on variable rate [14],[17],[18],[19] 5.25%  
Interest rate, cash [14],[17],[18],[19] 8.90%  
Investment, Identifier [Axis]: Main Line Commercial Pools LLC | Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [14],[17],[18],[19] $ (7)  
Basis spread on variable rate [14],[17],[18],[19] 5.25%  
Interest rate, cash [14],[17],[18],[19] 8.90%  
Investment, Identifier [Axis]: Markerstudy Group Limited | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [3],[14],[18],[26] $ 4,866  
Basis spread on variable rate [3],[14],[18],[26] 5.68%  
Interest rate, cash [3],[14],[18],[26] 9.40%  
Investment, Identifier [Axis]: Marmoutier Holding B.V. | Common Stock    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[10],[12] $ 0  
Fair value at ending balance $ 0 [3],[8],[14] $ 0 [7],[10],[12]
Investment owned, balance (in shares) 2,600,592 [3],[8],[14] 2,600,592 [7],[10],[12]
Investment, Identifier [Axis]: Marmoutier Holding B.V. | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[7],[12],[16],[27] $ 63  
Fair value at ending balance $ 169 [3],[14],[18],[19],[28] $ 63 [5],[7],[12],[16],[27]
Basis spread on variable rate 6.75% [3],[14],[18],[19],[28] 6.50% [5],[7],[12],[16],[27]
Interest rate, cash 9.10% [3],[14],[18],[19],[28] 8.60% [5],[7],[12],[16],[27]
Investment, Identifier [Axis]: Marmoutier Holding B.V. | Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[12],[16],[20] $ 146  
Fair value at ending balance $ 80 [3],[14],[18],[28] $ 146 [7],[12],[16],[20]
Basis spread on variable rate 5.50% [3],[14],[18],[28] 5.50% [7],[12],[16],[20]
Interest rate, cash 8.10% [3],[14],[18],[28] 7.60% [7],[12],[16],[20]
Investment, Identifier [Axis]: Marmoutier Holding B.V. | Super Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[12],[16],[20] $ 166  
Fair value at ending balance $ 84 [3],[14],[18],[21] $ 166 [7],[12],[16],[20]
Basis spread on variable rate 6.00% [3],[14],[18],[21] 6.25% [7],[12],[16],[20]
Interest rate, cash 8.30% [3],[14],[18],[21] 8.40% [7],[12],[16],[20]
Investment, Identifier [Axis]: Matrix Buyer, LLC | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [14],[17],[18],[19] $ 1,765  
Basis spread on variable rate [14],[17],[18],[19] 4.75%  
Interest rate, cash [14],[17],[18],[19] 8.50%  
Investment, Identifier [Axis]: Matrix Buyer, LLC | Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [14],[17],[18],[19] $ 49  
Basis spread on variable rate [14],[17],[18],[19] 4.75%  
Interest rate, cash [14],[17],[18],[19] 8.50%  
Investment, Identifier [Axis]: Media Recovery, Inc. (SpotSee) | First Lien Senior Secured Term Loan 1    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [12],[16],[30] $ 3,468  
Fair value at ending balance $ 1,703 [14],[17],[18] $ 3,468 [12],[16],[30]
Basis spread on variable rate 4.50% [14],[17],[18] 4.50% [12],[16],[30]
Interest rate, cash 8.20% [14],[17],[18] 8.20% [12],[16],[30]
Investment, Identifier [Axis]: Media Recovery, Inc. (SpotSee) | First Lien Senior Secured Term Loan 2    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [12],[15],[16] $ 1,771  
Fair value at ending balance $ 3,533 [14],[18],[26] $ 1,771 [12],[15],[16]
Basis spread on variable rate 4.50% [14],[18],[26] 4.50% [12],[15],[16]
Interest rate, cash 8.20% [14],[18],[26] 8.20% [12],[15],[16]
Investment, Identifier [Axis]: Media Recovery, Inc. (SpotSee) | Revolver 1    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[12],[15],[16] $ 0  
Fair value at ending balance $ 0 [14],[17],[18],[19] $ 0 [5],[12],[15],[16]
Basis spread on variable rate 4.50% [14],[17],[18],[19] 4.50% [5],[12],[15],[16]
Interest rate, cash 8.20% [14],[17],[18],[19] 8.20% [5],[12],[15],[16]
Investment, Identifier [Axis]: Media Recovery, Inc. (SpotSee) | Revolver 2    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[12],[16],[30] $ 0  
Fair value at ending balance $ 0 [14],[18],[19],[26] $ 0 [5],[12],[16],[30]
Basis spread on variable rate 4.50% [14],[18],[19],[26] 4.50% [5],[12],[16],[30]
Interest rate, cash 8.20% [14],[18],[19],[26] 8.20% [5],[12],[16],[30]
Investment, Identifier [Axis]: Median B.V. | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[16],[30] $ 9,763  
Fair value at ending balance [7],[16],[30]   $ 9,763
Basis spread on variable rate [7],[16],[30]   5.93%
Interest rate, cash [7],[16],[30]   9.80%
Investment, Identifier [Axis]: Medical Solutions Parent Holdings, Inc. | Second Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [15],[16] 897  
Fair value at ending balance [15],[16]   $ 897
Basis spread on variable rate [15],[16]   7.00%
Interest rate, cash [15],[16]   10.90%
Investment, Identifier [Axis]: Medical Solutions Parent Holdings, Inc. | Second Out Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [18],[22] $ 237  
Basis spread on variable rate [18],[22] 3.50%  
Interest rate, cash [18],[22] 7.10%  
Investment, Identifier [Axis]: Medical Solutions Parent Holdings, Inc. | Third Out Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [18],[22] $ 212  
Basis spread on variable rate [18],[22] 7.00%  
Interest rate, cash [18],[22] 10.80%  
Investment, Identifier [Axis]: Megawatt Acquisitionco, Inc. | Common Stock    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [10],[12] $ 0  
Fair value at ending balance $ 0 [8],[14] $ 0 [10],[12]
Investment owned, balance (in shares) 205 [8],[14] 205 [10],[12]
Investment, Identifier [Axis]: Megawatt Acquisitionco, Inc. | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [12],[15],[16] $ 4,023  
Fair value at ending balance $ 4,004 [14],[17],[18] $ 4,023 [12],[15],[16]
Basis spread on variable rate 5.25% [14],[17],[18] 5.50% [12],[15],[16]
Interest rate, cash 9.00% [14],[17],[18] 9.20% [12],[15],[16]
Investment, Identifier [Axis]: Megawatt Acquisitionco, Inc. | Preferred Stock    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [10],[12] $ 153  
Fair value at ending balance $ 201 [8],[14] $ 153 [10],[12]
Investment owned, balance (in shares) 1,842 [8],[14] 1,842 [10],[12]
Investment, Identifier [Axis]: Megawatt Acquisitionco, Inc. | Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[12],[15],[16] $ (15)  
Fair value at ending balance $ 150 [14],[17],[18],[19] $ (15) [5],[12],[15],[16]
Basis spread on variable rate 5.25% [14],[17],[18],[19] 5.50% [5],[12],[15],[16]
Interest rate, cash 9.00% [14],[17],[18],[19] 9.20% [5],[12],[15],[16]
Investment, Identifier [Axis]: Mercell Holding AS | Class A Units    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[10],[12] $ 123  
Fair value at ending balance $ 73 [3],[8],[14] $ 123 [7],[10],[12]
Investment owned, balance (in shares) 114.4 [3],[8],[14] 114.4 [7],[10],[12]
Investment, Identifier [Axis]: Mercell Holding AS | Class B Units    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[10],[12] $ 0  
Fair value at ending balance $ 0 [3],[8],[14] $ 0 [7],[10],[12]
Investment owned, balance (in shares) 28,943.8 [3],[8],[14] 28,943.8 [7],[10],[12]
Investment, Identifier [Axis]: Mercell Holding AS | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[7],[12],[16],[63] $ 3,098  
Fair value at ending balance $ 2,991 [3],[14],[18],[19],[64] $ 3,098 [5],[7],[12],[16],[63]
Basis spread on variable rate 5.25% [3],[14],[18],[19],[64] 5.00% [5],[7],[12],[16],[63]
Interest rate, cash 9.60% [3],[14],[18],[19],[64] 8.90% [5],[7],[12],[16],[63]
Investment, Identifier [Axis]: Modern Star Holdings Bidco Pty Limited | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[7],[12],[16],[65] $ 7,420  
Fair value at ending balance [5],[7],[12],[16],[65]   $ 7,420
Basis spread on variable rate [5],[7],[12],[16],[65]   6.00%
Interest rate, cash [5],[7],[12],[16],[65]   9.90%
Investment, Identifier [Axis]: Momentum Textiles, LLC | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [12],[15],[16] 7,218  
Fair value at ending balance $ 7,180 [14],[17],[18] $ 7,218 [12],[15],[16]
Basis spread on variable rate 5.50% [14],[17],[18] 5.50% [12],[15],[16]
Interest rate, cash 9.20% [14],[17],[18] 9.20% [12],[15],[16]
Investment, Identifier [Axis]: Momentum Textiles, LLC | Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[12],[15],[16] $ (9)  
Fair value at ending balance $ (7) [14],[17],[18],[19] $ (9) [5],[12],[15],[16]
Basis spread on variable rate 5.50% [14],[17],[18],[19] 5.50% [5],[12],[15],[16]
Interest rate, cash 9.20% [14],[17],[18],[19] 9.20% [5],[12],[15],[16]
Investment, Identifier [Axis]: Moonlight Bidco Limited | Common Stock    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[10],[12] $ 202  
Fair value at ending balance $ 204 [3],[8],[14] $ 202 [7],[10],[12]
Investment owned, balance (in shares) 10,590 [3],[8],[14] 10,590 [7],[10],[12]
Investment, Identifier [Axis]: Moonlight Bidco Limited | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[7],[12],[16],[30] $ 1,998  
Fair value at ending balance $ 2,259 [3],[14],[18],[19],[26] $ 1,998 [5],[7],[12],[16],[30]
Basis spread on variable rate 5.10% [3],[14],[18],[19],[26] 5.10% [5],[7],[12],[16],[30]
Interest rate, cash 8.80% [3],[14],[18],[19],[26] 8.80% [5],[7],[12],[16],[30]
Investment, Identifier [Axis]: Murphy Midco Limited | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[12],[16],[31] $ 1,570  
Fair value at ending balance $ 1,450 [3],[14],[18],[32] $ 1,570 [7],[12],[16],[31]
Basis spread on variable rate 6.25% [3],[14],[18],[32] 5.75% [7],[12],[16],[31]
Interest rate, cash 10.30% [3],[14],[18],[32] 10.00% [7],[12],[16],[31]
Investment, Identifier [Axis]: Music Reports, Inc. | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [12],[15],[16] $ 6,791  
Fair value at ending balance $ 6,812 [14],[17],[18] $ 6,791 [12],[15],[16]
Basis spread on variable rate 6.00% [14],[17],[18] 6.25% [12],[15],[16]
Interest rate, cash 9.80% [14],[17],[18] 10.30% [12],[15],[16]
Investment, Identifier [Axis]: NAW Buyer LLC | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[12],[15],[16] $ 12,816  
Fair value at ending balance $ 14,822 [14],[17],[18],[19] $ 12,816 [5],[12],[15],[16]
Basis spread on variable rate 4.75% [14],[17],[18],[19] 4.75% [5],[12],[15],[16]
Interest rate, cash 8.40% [14],[17],[18],[19] 8.40% [5],[12],[15],[16]
Investment, Identifier [Axis]: NAW Buyer LLC | LLC Units    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [12] $ 595  
Fair value at ending balance $ 666 [8],[14] $ 595 [12]
Investment owned, balance (in shares) 472,512 [8],[14] 472,512 [12]
Investment, Identifier [Axis]: NAW Buyer LLC | Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[12],[15],[16] $ (9)  
Fair value at ending balance $ (3) [14],[17],[18],[19] $ (9) [5],[12],[15],[16]
Basis spread on variable rate 4.75% [14],[17],[18],[19] 4.75% [5],[12],[15],[16]
Interest rate, cash 8.40% [14],[17],[18],[19] 8.40% [5],[12],[15],[16]
Investment, Identifier [Axis]: NF Holdco, LLC | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [12],[15],[16] $ 5,921  
Fair value at ending balance $ 5,713 [14],[17],[18] $ 5,921 [12],[15],[16]
Basis spread on variable rate 6.50% [14],[17],[18] 6.50% [12],[15],[16]
Interest rate, cash 10.20% [14],[17],[18] 10.20% [12],[15],[16]
Investment, Identifier [Axis]: NF Holdco, LLC | LLC Units    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [10],[12] $ 224  
Fair value at ending balance $ 115 [8],[14] $ 224 [10],[12]
Investment owned, balance (in shares) 639,510 [8],[14] 639,510 [10],[12]
Investment, Identifier [Axis]: NF Holdco, LLC | Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[12],[15],[16] $ 422  
Fair value at ending balance $ 786 [14],[17],[18],[19] $ 422 [5],[12],[15],[16]
Basis spread on variable rate 6.50% [14],[17],[18],[19] 6.50% [5],[12],[15],[16]
Interest rate, cash 10.20% [14],[17],[18],[19] 10.20% [5],[12],[15],[16]
Investment, Identifier [Axis]: NPM Investments 28 B.V. | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[7],[12],[16],[20] $ 2,393  
Fair value at ending balance $ 2,329 [3],[14],[18],[19],[21] $ 2,393 [5],[7],[12],[16],[20]
Basis spread on variable rate 5.45% [3],[14],[18],[19],[21] 5.18% [5],[7],[12],[16],[20]
Interest rate, cash 7.70% [3],[14],[18],[19],[21] 7.20% [5],[7],[12],[16],[20]
Investment, Identifier [Axis]: Napa Bidco Pty Ltd | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[12],[16],[34] $ 13,420  
Fair value at ending balance $ 13,942 [3],[14],[18],[35] $ 13,420 [7],[12],[16],[34]
Basis spread on variable rate 5.00% [3],[14],[18],[35] 5.00% [7],[12],[16],[34]
Interest rate, cash 9.50% [3],[14],[18],[35] 8.70% [7],[12],[16],[34]
Investment, Identifier [Axis]: Nationwide Legal Services, LLC | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [14],[17],[18],[19] $ 7,881  
Basis spread on variable rate [14],[17],[18],[19] 4.50%  
Interest rate, cash [14],[17],[18],[19] 8.10%  
Investment, Identifier [Axis]: Nationwide Legal Services, LLC | Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [14],[17],[18],[19] $ (15)  
Basis spread on variable rate [14],[17],[18],[19] 4.50%  
Interest rate, cash [14],[17],[18],[19] 8.10%  
Investment, Identifier [Axis]: NeoxCo | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[12],[16],[27] $ 2,808  
Fair value at ending balance $ 2,734 [3],[14],[18],[28] $ 2,808 [7],[12],[16],[27]
Basis spread on variable rate 6.50% [3],[14],[18],[28] 6.50% [7],[12],[16],[27]
Interest rate, cash 8.80% [3],[14],[18],[28] 9.10% [7],[12],[16],[27]
Investment, Identifier [Axis]: Next Holdco, LLC | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [12],[15],[16] $ 22,055  
Fair value at ending balance $ 21,998 [14],[17],[18] $ 22,055 [12],[15],[16]
Basis spread on variable rate 5.25% [14],[17],[18] 5.25% [12],[15],[16]
Interest rate, cash 8.90% [14],[17],[18] 9.10% [12],[15],[16]
Investment, Identifier [Axis]: Next Holdco, LLC | Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[12],[15],[16] $ (3)  
Fair value at ending balance $ (1) [14],[17],[18],[19] $ (3) [5],[12],[15],[16]
Basis spread on variable rate 5.25% [14],[17],[18],[19] 5.25% [5],[12],[15],[16]
Interest rate, cash 8.90% [14],[17],[18],[19] 9.10% [5],[12],[15],[16]
Investment, Identifier [Axis]: Northstar Recycling, LLC | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [12],[15],[16] $ 12,490  
Fair value at ending balance $ 12,542 [14],[17],[18] $ 12,490 [12],[15],[16]
Basis spread on variable rate 4.40% [14],[17],[18] 4.65% [12],[15],[16]
Interest rate, cash 8.10% [14],[17],[18] 8.30% [12],[15],[16]
Investment, Identifier [Axis]: Northstar Recycling, LLC | Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[12],[15],[16] $ (32)  
Fair value at ending balance $ 0 [14],[17],[18],[19] $ (32) [5],[12],[15],[16]
Basis spread on variable rate 4.40% [14],[17],[18],[19] 4.65% [5],[12],[15],[16]
Interest rate, cash 8.10% [14],[17],[18],[19] 8.30% [5],[12],[15],[16]
Investment, Identifier [Axis]: OAC Holdings I Corp | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [12],[15],[16] $ 3,285  
Fair value at ending balance $ 3,276 [14],[17],[18] $ 3,285 [12],[15],[16]
Basis spread on variable rate 5.00% [14],[17],[18] 5.00% [12],[15],[16]
Interest rate, cash 8.80% [14],[17],[18] 9.00% [12],[15],[16]
Investment, Identifier [Axis]: OAC Holdings I Corp | Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[12],[15],[16] $ 0  
Fair value at ending balance $ 783 [14],[17],[18],[19] $ 0 [5],[12],[15],[16]
Basis spread on variable rate 5.00% [14],[17],[18],[19] 5.00% [5],[12],[15],[16]
Interest rate, cash 8.80% [14],[17],[18],[19] 9.00% [5],[12],[15],[16]
Investment, Identifier [Axis]: OG III B.V. | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[12],[16],[20] $ 3,589  
Fair value at ending balance $ 3,464 [3],[14],[18],[21] $ 3,589 [7],[12],[16],[20]
Basis spread on variable rate 5.65% [3],[14],[18],[21] 5.75% [7],[12],[16],[20]
Interest rate, cash 7.90% [3],[14],[18],[21] 7.70% [7],[12],[16],[20]
Investment, Identifier [Axis]: ORS Buyer, Inc. | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [12],[15],[16] $ 4,905  
Fair value at ending balance $ 6,299 [14],[17],[18] $ 4,905 [12],[15],[16]
Basis spread on variable rate 4.75% [14],[17],[18] 5.00% [12],[15],[16]
Interest rate, cash 8.50% [14],[17],[18] 8.70% [12],[15],[16]
Investment, Identifier [Axis]: ORS Buyer, Inc. | Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [14],[17],[18],[19] $ 410  
Basis spread on variable rate [14],[17],[18],[19] 4.75%  
Interest rate, cash [14],[17],[18],[19] 8.50%  
Investment, Identifier [Axis]: ORTEC International Newco B.V. | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[12],[16],[20] $ 1,074  
Fair value at ending balance $ 1,045 [3],[14],[18],[21] $ 1,074 [7],[12],[16],[20]
Basis spread on variable rate 5.25% [3],[14],[18],[21] 5.25% [7],[12],[16],[20]
Interest rate, cash 7.60% [3],[14],[18],[21] 7.30% [7],[12],[16],[20]
Investment, Identifier [Axis]: OSP AFS Buyer, LLC | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[12],[16],[23] $ 2,883  
Fair value at ending balance $ 2,893 [14],[17],[18],[19] $ 2,883 [5],[12],[16],[23]
Basis spread on variable rate 4.50% [14],[17],[18],[19] 5.00% [5],[12],[16],[23]
Interest rate, cash 8.20% [14],[17],[18],[19] 8.70% [5],[12],[16],[23]
Investment, Identifier [Axis]: OSP AFS Buyer, LLC | Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[12],[16],[23] $ (16)  
Fair value at ending balance $ (13) [14],[17],[18],[19] $ (16) [5],[12],[16],[23]
Basis spread on variable rate 4.50% [14],[17],[18],[19] 5.00% [5],[12],[16],[23]
Interest rate, cash 8.20% [14],[17],[18],[19] 8.70% [5],[12],[16],[23]
Investment, Identifier [Axis]: OSP Hamilton Purchaser, LLC | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [12],[15],[16] $ 18,094  
Fair value at ending balance $ 17,971 [14],[17],[18] $ 18,094 [12],[15],[16]
Basis spread on variable rate 4.25% [14],[17],[18] 5.25% [12],[15],[16]
Interest rate, cash 7.90% [14],[17],[18] 9.10% [12],[15],[16]
Investment, Identifier [Axis]: OSP Hamilton Purchaser, LLC | LP Units    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [10],[12] $ 182  
Fair value at ending balance $ 184 [8],[14] $ 182 [10],[12]
Investment owned, balance (in shares) 173,749 [8],[14] 173,749 [10],[12]
Investment, Identifier [Axis]: OSP Hamilton Purchaser, LLC | Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[12],[15],[16] $ 672  
Fair value at ending balance $ 669 [14],[17],[18],[19] $ 672 [5],[12],[15],[16]
Basis spread on variable rate 4.25% [14],[17],[18],[19] 5.25% [5],[12],[15],[16]
Interest rate, cash 7.90% [14],[17],[18],[19] 9.10% [5],[12],[15],[16]
Investment, Identifier [Axis]: OSP Lakeside Intermediate Holdings 2, LLC | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [12],[16],[23] $ 4,201  
Fair value at ending balance $ 3,972 [14],[18],[22] $ 4,201 [12],[16],[23]
Basis spread on variable rate 5.50% [14],[18],[22] 5.50% [12],[16],[23]
Interest rate, cash 9.10% [14],[18],[22] 9.20% [12],[16],[23]
Investment, Identifier [Axis]: OSP Lakeside Intermediate Holdings 2, LLC | Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[12],[16],[23] $ (11)  
Fair value at ending balance $ (47) [14],[18],[19],[22] $ (11) [5],[12],[16],[23]
Basis spread on variable rate 5.50% [14],[18],[19],[22] 5.50% [5],[12],[16],[23]
Interest rate, cash 9.10% [14],[18],[19],[22] 9.20% [5],[12],[16],[23]
Investment, Identifier [Axis]: Ocelot Holdco LLC | Common Stock    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [10],[12] $ 2,831  
Fair value at ending balance [10],[12]   $ 2,831
Investment owned, balance (in shares) [10],[12]   186.67
Investment, Identifier [Axis]: Ocelot Holdco LLC | Preferred Stock    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [12] 2,438  
Fair value at ending balance [12]   $ 2,438
Investment, interest rate, paid in kind [12]   15.00%
Investment owned, balance (in shares) [12]   243.81
Investment, Identifier [Axis]: Ocelot Holdco LLC | Takeback Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [12] 2,933  
Fair value at ending balance [12]   $ 2,933
Interest rate, cash [12]   10.00%
Investment, Identifier [Axis]: Ocular Therapeutix, Inc. | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[12],[16],[23] 4,826  
Fair value at ending balance $ 4,625 [3],[14],[18],[22] $ 4,826 [7],[12],[16],[23]
Basis spread on variable rate 6.75% [3],[14],[18],[22] 6.75% [7],[12],[16],[23]
Interest rate, cash 10.40% [3],[14],[18],[22] 10.60% [7],[12],[16],[23]
Investment, Identifier [Axis]: Oracle Vision Bidco Limited | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[12],[16],[31] $ 2,925  
Fair value at ending balance $ 2,774 [3],[14],[18],[32] $ 2,925 [7],[12],[16],[31]
Basis spread on variable rate 5.20% [3],[14],[18],[32] 5.00% [7],[12],[16],[31]
Interest rate, cash 8.90% [3],[14],[18],[32] 9.00% [7],[12],[16],[31]
Investment, Identifier [Axis]: Origin Bidco Limited | First Lien Senior Secured Term Loan 1    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[12],[16],[20] $ 345  
Fair value at ending balance $ 339 [3],[14],[18],[21] $ 345 [7],[12],[16],[20]
Basis spread on variable rate 5.00% [3],[14],[18],[21] 5.00% [7],[12],[16],[20]
Interest rate, cash 7.40% [3],[14],[18],[21] 7.10% [7],[12],[16],[20]
Investment, Identifier [Axis]: Origin Bidco Limited | First Lien Senior Secured Term Loan 2    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[12],[15],[16] $ 529  
Fair value at ending balance $ 533 [3],[14],[17],[18] $ 529 [7],[12],[15],[16]
Basis spread on variable rate 5.00% [3],[14],[17],[18] 5.00% [7],[12],[15],[16]
Interest rate, cash 8.80% [3],[14],[17],[18] 9.10% [7],[12],[15],[16]
Investment, Identifier [Axis]: Owl Intermediate Holdings, LLC | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[12],[15],[16] $ 2,345  
Fair value at ending balance $ 2,156 [14],[17],[18],[19] $ 2,345 [5],[12],[15],[16]
Basis spread on variable rate 4.75% [14],[17],[18],[19] 4.75% [5],[12],[15],[16]
Interest rate, cash 8.40% [14],[17],[18],[19] 8.70% [5],[12],[15],[16]
Investment, Identifier [Axis]: Owl Intermediate Holdings, LLC | Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[12],[15],[16] $ (86)  
Fair value at ending balance $ 170 [14],[17],[18],[19] $ (86) [5],[12],[15],[16]
Basis spread on variable rate 4.75% [14],[17],[18],[19] 4.75% [5],[12],[15],[16]
Interest rate, cash 8.40% [14],[17],[18],[19] 8.70% [5],[12],[15],[16]
Investment, Identifier [Axis]: PAS Chassis Holdco LLC | Second Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [14],[17],[18] $ 14,163  
Basis spread on variable rate [14],[17],[18] 5.50%  
Interest rate, cash [14],[17],[18] 9.20%  
Investment, Identifier [Axis]: PDQ.Com Corporation | Class A-2 Partnership Units    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [10],[12] $ 39  
Fair value at ending balance $ 28 [8],[14] $ 39 [10],[12]
Investment owned, balance (in shares) 13.9 [8],[14] 13.9 [10],[12]
Investment, Identifier [Axis]: PDQ.Com Corporation | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [12],[15],[16] $ 13,253  
Fair value at ending balance $ 13,049 [14],[17],[18] $ 13,253 [12],[15],[16]
Basis spread on variable rate 4.50% [14],[17],[18] 4.75% [12],[15],[16]
Interest rate, cash 8.20% [14],[17],[18] 8.40% [12],[15],[16]
Investment, Identifier [Axis]: PSP Intermediate 4, LLC | First Lien Senior Secured Term Loan 1    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[12],[16],[20] $ 960  
Fair value at ending balance $ 930 [3],[14],[18],[21] $ 960 [7],[12],[16],[20]
Basis spread on variable rate 4.75% [3],[14],[18],[21] 5.25% [7],[12],[16],[20]
Interest rate, cash 7.00% [3],[14],[18],[21] 7.30% [7],[12],[16],[20]
Investment, Identifier [Axis]: PSP Intermediate 4, LLC | First Lien Senior Secured Term Loan 2    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[12],[15],[16] $ 1,411  
Fair value at ending balance $ 1,404 [3],[14],[17],[18] $ 1,411 [7],[12],[15],[16]
Basis spread on variable rate 4.75% [3],[14],[17],[18] 5.25% [7],[12],[15],[16]
Interest rate, cash 8.50% [3],[14],[17],[18] 9.40% [7],[12],[15],[16]
Investment, Identifier [Axis]: Panoche Energy Center LLC | First Lien Senior Secured Bond    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [12] $ 3,058  
Fair value at ending balance $ 2,709 [14] $ 3,058 [12]
Interest rate, cash 6.90% [14] 6.90% [12]
Investment, Identifier [Axis]: Panther Bidco Pty Ltd | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [3],[14],[18],[19],[35] $ 4,070  
Basis spread on variable rate [3],[14],[18],[19],[35] 5.00%  
Interest rate, cash [3],[14],[18],[19],[35] 9.40%  
Investment, Identifier [Axis]: Pare SAS (SAS Maurice MARLE) | First Lien Senior Secured Term Loan 1    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[12],[16],[20] $ 2,537  
Fair value at ending balance $ 2,587 [3],[14],[18],[21] $ 2,537 [7],[12],[16],[20]
Basis spread on variable rate 5.15% [3],[14],[18],[21] 5.15% [7],[12],[16],[20]
Interest rate, cash 7.40% [3],[14],[18],[21] 7.20% [7],[12],[16],[20]
Investment, Identifier [Axis]: Pare SAS (SAS Maurice MARLE) | First Lien Senior Secured Term Loan 2    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[12],[15],[16] $ 1,200  
Fair value at ending balance $ 1,300 [3],[14],[17],[18] $ 1,200 [7],[12],[15],[16]
Basis spread on variable rate 5.25% [3],[14],[17],[18] 5.25% [7],[12],[15],[16]
Interest rate, cash 9.30% [3],[14],[17],[18] 9.70% [7],[12],[15],[16]
Investment, Identifier [Axis]: Parkview Dental Holdings LLC | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [14],[18],[22] $ 623  
Basis spread on variable rate [14],[18],[22] 8.30%  
Interest rate, cash [14],[18],[22] 11.80%  
Investment, Identifier [Axis]: Parkview Dental Holdings LLC | First Lien Senior Secured Term Loan 1    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [12],[16],[23] $ 29  
Fair value at ending balance [12],[16],[23]   $ 29
Basis spread on variable rate [12],[16],[23]   8.25%
Interest rate, cash [12],[16],[23]   12.00%
Investment, Identifier [Axis]: Parkview Dental Holdings LLC | First Lien Senior Secured Term Loan 2    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [12],[16],[23] 592  
Fair value at ending balance [12],[16],[23]   $ 592
Basis spread on variable rate [12],[16],[23]   8.30%
Interest rate, cash [12],[16],[23]   12.00%
Investment, Identifier [Axis]: Parkview Dental Holdings LLC | LLC Units    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [10],[12] 227  
Fair value at ending balance $ 205 [8],[14] $ 227 [10],[12]
Investment owned, balance (in shares) 29,762 [8],[14] 29,762 [10],[12]
Investment, Identifier [Axis]: Parkview Dental Holdings LLC | Preferred Stock    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [12] $ 38  
Fair value at ending balance $ 39 [14] $ 38 [12]
Investment, interest rate, paid in kind 10.00% [14] 10.00% [12]
Investment owned, balance (in shares) 1,229.1 [14] 1,229.1 [12]
Investment, Identifier [Axis]: Patriot New Midco 1 Limited (Forensic Risk Alliance) | First Lien Senior Secured Term Loan 1    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[12],[16],[20] $ 2,115  
Fair value at ending balance [7],[12],[16],[20]   $ 2,115
Basis spread on variable rate [7],[12],[16],[20]   5.50%
Interest rate, cash [7],[12],[16],[20]   7.60%
Investment, Identifier [Axis]: Patriot New Midco 1 Limited (Forensic Risk Alliance) | First Lien Senior Secured Term Loan 2    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[12],[15],[16] 2,397  
Fair value at ending balance [7],[12],[15],[16]   $ 2,397
Basis spread on variable rate [7],[12],[15],[16]   5.30%
Interest rate, cash [7],[12],[15],[16]   9.50%
Investment, Identifier [Axis]: Pepper Bidco Pty Ltd | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [3],[14],[18],[19],[35] $ 1,699  
Basis spread on variable rate [3],[14],[18],[19],[35] 4.75%  
Interest rate, cash [3],[14],[18],[19],[35] 9.30%  
Investment, Identifier [Axis]: Perimeter Master Note Business Trust | Structured Secured Note - Class A    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[12] $ 181  
Fair value at ending balance $ 180 [3],[14] $ 181 [7],[12]
Interest rate, cash 4.70% [3],[14] 4.70% [7],[12]
Investment, Identifier [Axis]: Perimeter Master Note Business Trust | Structured Secured Note - Class B    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[12] $ 181  
Fair value at ending balance $ 181 [3],[14] $ 181 [7],[12]
Interest rate, cash 5.40% [3],[14] 5.40% [7],[12]
Investment, Identifier [Axis]: Perimeter Master Note Business Trust | Structured Secured Note - Class C    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[12] $ 181  
Fair value at ending balance $ 181 [3],[14] $ 181 [7],[12]
Interest rate, cash 5.90% [3],[14] 5.90% [7],[12]
Investment, Identifier [Axis]: Perimeter Master Note Business Trust | Structured Secured Note - Class D    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[12] $ 181  
Fair value at ending balance $ 181 [3],[14] $ 181 [7],[12]
Interest rate, cash 8.50% [3],[14] 8.50% [7],[12]
Investment, Identifier [Axis]: Perimeter Master Note Business Trust | Structured Secured Note - Class E    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[12] $ 9,132  
Fair value at ending balance $ 9,137 [3],[14] $ 9,132 [7],[12]
Interest rate, cash 11.40% [3],[14] 11.40% [7],[12]
Investment, Identifier [Axis]: Permaconn BidCo Pty Ltd | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[12],[16],[34] $ 2,732  
Fair value at ending balance $ 2,839 [3],[14],[18],[35] $ 2,732 [7],[12],[16],[34]
Basis spread on variable rate 4.75% [3],[14],[18],[35] 4.75% [7],[12],[16],[34]
Interest rate, cash 9.30% [3],[14],[18],[35] 8.50% [7],[12],[16],[34]
Investment, Identifier [Axis]: Pinion Holdings Limited | Preferred Stock    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [3],[14] $ 289  
Investment, interest rate, paid in kind [3],[14] 10.00%  
Investment owned, balance (in shares) [3],[14] 288,816.1  
Investment, Identifier [Axis]: Polara Enterprises, L.L.C. | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [12],[15],[16] $ 944  
Fair value at ending balance $ 938 [14],[17],[18] $ 944 [12],[15],[16]
Basis spread on variable rate 4.50% [14],[17],[18] 4.50% [12],[15],[16]
Interest rate, cash 8.40% [14],[17],[18] 8.30% [12],[15],[16]
Investment, Identifier [Axis]: Polara Enterprises, L.L.C. | Partnership Units    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [12] $ 1,974  
Fair value at ending balance $ 1,938 [14] $ 1,974 [12]
Investment owned, balance (in shares) 7,409 [14] 7,409 [12]
Investment, Identifier [Axis]: Polara Enterprises, L.L.C. | Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[12],[15],[16] $ 316  
Fair value at ending balance $ 0 [14],[17],[18],[19] $ 316 [5],[12],[15],[16]
Basis spread on variable rate 4.50% [14],[17],[18],[19] 4.50% [5],[12],[15],[16]
Interest rate, cash 8.40% [14],[17],[18],[19] 8.30% [5],[12],[15],[16]
Investment, Identifier [Axis]: Policy Services Company, LLC | Class A Units    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance $ 0  
Gross Additions [40] 0  
Gross Reductions [41] 0  
Amount of Realized Gain (Loss) 0  
Amount of Unrealized Gain (Loss) 0  
Fair value at ending balance 0 [2],[8],[14] $ 0
Amount of Interest or Dividends Credited to Income [42] $ 0  
Investment owned, balance (in shares) [2],[8],[14] 251.4  
Investment, Identifier [Axis]: Policy Services Company, LLC | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [12],[15],[16] $ 48,065  
Gross Additions [40] 50,122  
Gross Reductions [41] 0  
Amount of Realized Gain (Loss) 0  
Amount of Unrealized Gain (Loss) (226)  
Fair value at ending balance 49,896 [2],[14],[17],[18] $ 48,065 [12],[15],[16]
Amount of Interest or Dividends Credited to Income [42] $ 1,995  
Basis spread on variable rate 6.00% [2],[14],[17],[18] 6.00% [12],[15],[16]
Investment, interest rate, paid in kind 4.00% [2],[14],[17],[18] 4.00% [12],[15],[16]
Interest rate, cash 9.90% [2],[14],[17],[18] 10.50% [12],[15],[16]
Investment, Identifier [Axis]: Policy Services Company, LLC | Warrants - Class A    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [10],[12] $ 0  
Gross Additions [40] 0  
Gross Reductions [41] 0  
Amount of Realized Gain (Loss) 0  
Amount of Unrealized Gain (Loss) 0  
Fair value at ending balance 0 [2],[8],[14] $ 0 [10],[12]
Amount of Interest or Dividends Credited to Income [42] $ 0  
Investment owned, balance (in shares) 2.5582 [2],[8],[14] 2.5582 [10],[12]
Investment, Identifier [Axis]: Policy Services Company, LLC | Warrants - Class B    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [10],[12] $ 0  
Gross Additions [40] 0  
Gross Reductions [41] 0  
Amount of Realized Gain (Loss) 0  
Amount of Unrealized Gain (Loss) 0  
Fair value at ending balance 0 [2],[8],[14] $ 0 [10],[12]
Amount of Interest or Dividends Credited to Income [42] $ 0  
Investment owned, balance (in shares) 0.8634 [2],[8],[14] 0.8634 [10],[12]
Investment, Identifier [Axis]: Policy Services Company, LLC | Warrants - Class CC    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [10],[12] $ 0  
Gross Additions [40] 0  
Gross Reductions [41] 0  
Amount of Realized Gain (Loss) 0  
Amount of Unrealized Gain (Loss) 0  
Fair value at ending balance 0 [2],[8],[14] $ 0 [10],[12]
Amount of Interest or Dividends Credited to Income [42] $ 0  
Investment owned, balance (in shares) 0.0888 [2],[8],[14] 0.0888 [10],[12]
Investment, Identifier [Axis]: Policy Services Company, LLC | Warrants - Class D    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [10],[12] $ 0  
Gross Additions [40]  
Gross Reductions [41] 0  
Amount of Realized Gain (Loss) 0  
Amount of Unrealized Gain (Loss) 0  
Fair value at ending balance 0 [2],[8],[14] $ 0 [10],[12]
Amount of Interest or Dividends Credited to Income [42] $ 0  
Investment owned, balance (in shares) 0.2471 [2],[8],[14] 0.2471 [10],[12]
Investment, Identifier [Axis]: Polymer Solutions Group Holdings, LLC | Common Stock    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[9],[10],[12] $ 0  
Fair value at ending balance $ 0 [8],[14] $ 0 [7],[9],[10],[12]
Investment owned, balance (in shares) 74 [8],[14] 74 [7],[9],[10],[12]
Investment, Identifier [Axis]: Polymer Solutions Group Holdings, LLC | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [9],[12],[15],[16],[24] $ 364  
Fair value at ending balance $ 314 [14],[17],[18],[25] $ 364 [9],[12],[15],[16],[24]
Basis spread on variable rate 7.00% [14],[17],[18],[25] 7.00% [9],[12],[15],[16],[24]
Investment, interest rate, paid in kind 11.40% [14],[17],[18],[25] 11.40% [9],[12],[15],[16],[24]
Investment, Identifier [Axis]: PowerGEM Buyer, Inc. | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[12],[15],[16] $ 4,867  
Fair value at ending balance $ 5,625 [14],[17],[18],[19] $ 4,867 [5],[12],[15],[16]
Basis spread on variable rate 4.75% [14],[17],[18],[19] 5.00% [5],[12],[15],[16]
Interest rate, cash 8.40% [14],[17],[18],[19] 8.80% [5],[12],[15],[16]
Investment, Identifier [Axis]: PowerGEM Buyer, Inc. | Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[12],[15],[16] $ (4)  
Fair value at ending balance $ (12) [14],[17],[18],[19] $ (4) [5],[12],[15],[16]
Basis spread on variable rate 4.75% [14],[17],[18],[19] 5.00% [5],[12],[15],[16]
Interest rate, cash 8.40% [14],[17],[18],[19] 8.80% [5],[12],[15],[16]
Investment, Identifier [Axis]: Premium Franchise Brands, LLC | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [12],[16],[33] $ 10,012  
Fair value at ending balance $ 9,991 [14],[17],[18] $ 10,012 [12],[16],[33]
Basis spread on variable rate 5.75% [14],[17],[18] 5.75% [12],[16],[33]
Interest rate, cash 9.60% [14],[17],[18] 9.60% [12],[16],[33]
Investment, Identifier [Axis]: Premium Invest | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[7],[12],[16],[20] $ 9,842  
Fair value at ending balance $ 9,661 [3],[14],[18],[19],[21] $ 9,842 [5],[7],[12],[16],[20]
Basis spread on variable rate 5.75% [3],[14],[18],[19],[21] 5.75% [5],[7],[12],[16],[20]
Interest rate, cash 8.00% [3],[14],[18],[19],[21] 7.80% [5],[7],[12],[16],[20]
Investment, Identifier [Axis]: Prime Power Solutions, LLC | Second Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [14],[17],[18] $ 14,700  
Basis spread on variable rate [14],[17],[18] 5.50%  
Interest rate, cash [14],[17],[18] 9.20%  
Investment, Identifier [Axis]: Pro-Vision Solutions Holdings, LLC | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [12],[16],[23] $ 7,678  
Fair value at ending balance $ 7,640 [14],[18],[22] $ 7,678 [12],[16],[23]
Basis spread on variable rate 4.25% [14],[18],[22] 4.50% [12],[16],[23]
Interest rate, cash 7.90% [14],[18],[22] 8.20% [12],[16],[23]
Investment, Identifier [Axis]: Pro-Vision Solutions Holdings, LLC | LLC Units    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [10],[12] $ 249  
Fair value at ending balance $ 331 [8],[14] $ 249 [10],[12]
Investment owned, balance (in shares) 2,357.5 [8],[14] 2,357.5 [10],[12]
Investment, Identifier [Axis]: Pro-Vision Solutions Holdings, LLC | Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[12],[16],[23] $ 137  
Fair value at ending balance $ 199 [14],[18],[19],[22] $ 137 [5],[12],[16],[23]
Basis spread on variable rate 4.25% [14],[18],[19],[22] 4.50% [5],[12],[16],[23]
Interest rate, cash 7.90% [14],[18],[19],[22] 8.20% [5],[12],[16],[23]
Investment, Identifier [Axis]: Proceed Legal Inc. | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [14],[17],[18],[19] $ 9,762  
Basis spread on variable rate [14],[17],[18],[19] 4.50%  
Interest rate, cash [14],[17],[18],[19] 8.20%  
Investment, Identifier [Axis]: Proceed Legal Inc. | Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [14],[17],[18],[19] $ (4)  
Basis spread on variable rate [14],[17],[18],[19] 4.50%  
Interest rate, cash [14],[17],[18],[19] 8.20%  
Investment, Identifier [Axis]: Process Equipment, Inc. (ProcessBarron) | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [12],[16],[33] $ 5,254  
Fair value at ending balance $ 5,253 [14],[18],[29] $ 5,254 [12],[16],[33]
Basis spread on variable rate 5.25% [14],[18],[29] 5.25% [12],[16],[33]
Interest rate, cash 9.20% [14],[18],[29] 9.10% [12],[16],[33]
Investment, Identifier [Axis]: Process Insights Acquisition, Inc. | Class A Preferred Stock    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [14] $ 17  
Investment, interest rate, paid in kind [14] 12.00%  
Investment owned, balance (in shares) [14] 28.84  
Investment, Identifier [Axis]: Process Insights Acquisition, Inc. | Common Stock    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [10],[12] $ 72  
Fair value at ending balance $ 0 [8],[14] $ 72 [10],[12]
Investment owned, balance (in shares) 281 [8],[14] 281 [10],[12]
Investment, Identifier [Axis]: Process Insights Acquisition, Inc. | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [12],[15],[16] $ 5,022  
Fair value at ending balance $ 4,797 [14],[17],[18] $ 5,022 [12],[15],[16]
Basis spread on variable rate 1.25% [14],[17],[18] 6.25% [12],[15],[16]
Investment, interest rate, paid in kind [14],[17],[18] 4.60%  
Interest rate, cash 5.30% [14],[17],[18] 10.10% [12],[15],[16]
Investment, Identifier [Axis]: Process Insights Acquisition, Inc. | Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [12],[15],[16] $ 896  
Fair value at ending balance $ 351 [14],[17],[18],[19] $ 896 [12],[15],[16]
Basis spread on variable rate 1.25% [14],[17],[18],[19] 6.25% [12],[15],[16]
Investment, interest rate, paid in kind [14],[17],[18],[19] 4.60%  
Interest rate, cash 5.30% [14],[17],[18],[19] 10.10% [12],[15],[16]
Investment, Identifier [Axis]: ProfitOptics, LLC | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [12],[16],[23] $ 1,595  
Fair value at ending balance $ 1,577 [14],[18],[22] $ 1,595 [12],[16],[23]
Basis spread on variable rate 5.00% [14],[18],[22] 5.75% [12],[16],[23]
Interest rate, cash 8.70% [14],[18],[22] 9.60% [12],[16],[23]
Investment, Identifier [Axis]: ProfitOptics, LLC | LLC Units    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [10],[12] $ 423  
Fair value at ending balance $ 448 [8],[14] $ 423 [10],[12]
Investment owned, balance (in shares) 241,935.48 [8],[14] 241,935.48 [10],[12]
Investment, Identifier [Axis]: ProfitOptics, LLC | Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[12],[16],[23] $ 0  
Fair value at ending balance $ (3) [14],[18],[19],[22] $ 0 [5],[12],[16],[23]
Basis spread on variable rate 5.00% [14],[18],[19],[22] 5.75% [5],[12],[16],[23]
Interest rate, cash 8.70% [14],[18],[19],[22] 9.60% [5],[12],[16],[23]
Investment, Identifier [Axis]: ProfitOptics, LLC | Senior Subordinated Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [12] $ 78  
Fair value at ending balance $ 78 [14] $ 78 [12]
Interest rate, cash 8.00% [14] 8.00% [12]
Investment, Identifier [Axis]: Protego Bidco B.V. | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [3],[14],[18],[21] $ 1,867  
Basis spread on variable rate [3],[14],[18],[21] 6.00%  
Interest rate, cash [3],[14],[18],[21] 8.30%  
Investment, Identifier [Axis]: Protego Bidco B.V. | First Lien Senior Secured Term Loan 1    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[12],[16],[27] $ 1,599  
Fair value at ending balance [7],[12],[16],[27]   $ 1,599
Basis spread on variable rate [7],[12],[16],[27]   6.00%
Interest rate, cash [7],[12],[16],[27]   8.10%
Investment, Identifier [Axis]: Protego Bidco B.V. | First Lien Senior Secured Term Loan 2    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[12],[16],[27] 320  
Fair value at ending balance [7],[12],[16],[27]   $ 320
Basis spread on variable rate [7],[12],[16],[27]   6.50%
Interest rate, cash [7],[12],[16],[27]   8.60%
Investment, Identifier [Axis]: Protego Bidco B.V. | Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[12],[16],[27] 2,300  
Fair value at ending balance $ 2,239 [3],[14],[18],[21] $ 2,300 [7],[12],[16],[27]
Basis spread on variable rate 6.50% [3],[14],[18],[21] 6.50% [7],[12],[16],[27]
Interest rate, cash 8.80% [3],[14],[18],[21] 8.60% [7],[12],[16],[27]
Investment, Identifier [Axis]: Protego Bidco B.V. | Super Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [3],[14],[18],[21] $ 1,457  
Basis spread on variable rate [3],[14],[18],[21] 6.00%  
Interest rate, cash [3],[14],[18],[21] 8.30%  
Investment, Identifier [Axis]: QPE7 SPV1 BidCo Pty Ltd | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[12],[16],[66] $ 1,829  
Fair value at ending balance $ 1,674 [3],[14],[18],[67] $ 1,829 [7],[12],[16],[66]
Basis spread on variable rate 5.75% [3],[14],[18],[67] 5.00% [7],[12],[16],[66]
Interest rate, cash 10.10% [3],[14],[18],[67] 8.60% [7],[12],[16],[66]
Investment, Identifier [Axis]: Qima Finance LTD | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[7],[12],[15],[16] $ 2,799  
Fair value at ending balance [5],[7],[12],[15],[16]   $ 2,799
Basis spread on variable rate [5],[7],[12],[15],[16]   5.50%
Interest rate, cash [5],[7],[12],[15],[16]   9.40%
Investment, Identifier [Axis]: Qima Finance LTD | First Lien Senior Secured Term Loan 1    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [3],[14],[18],[21] $ 183  
Basis spread on variable rate [3],[14],[18],[21] 5.25%  
Interest rate, cash [3],[14],[18],[21] 7.40%  
Investment, Identifier [Axis]: Qima Finance LTD | First Lien Senior Secured Term Loan 2    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [3],[14],[17],[18],[19] $ 2,792  
Basis spread on variable rate [3],[14],[17],[18],[19] 5.25%  
Interest rate, cash [3],[14],[17],[18],[19] 8.90%  
Investment, Identifier [Axis]: R1 Holdings, LLC | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [12],[16],[33] $ 5,879  
Fair value at ending balance $ 5,711 [14],[17],[18] $ 5,879 [12],[16],[33]
Basis spread on variable rate 6.75% [14],[17],[18] 6.25% [12],[16],[33]
Interest rate, cash 10.40% [14],[17],[18] 9.90% [12],[16],[33]
Investment, Identifier [Axis]: R1 Holdings, LLC | Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[12],[16],[33] $ 1,796  
Fair value at ending balance $ 1,748 [14],[17],[18],[19] $ 1,796 [5],[12],[16],[33]
Basis spread on variable rate 6.75% [14],[17],[18],[19] 6.25% [5],[12],[16],[33]
Interest rate, cash 10.40% [14],[17],[18],[19] 9.90% [5],[12],[16],[33]
Investment, Identifier [Axis]: RA Outdoors, LLC | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [9],[12],[16],[24],[33] $ 9,785  
Fair value at ending balance $ 7,828 [14],[18],[25],[29],[56] $ 9,785 [9],[12],[16],[24],[33]
Basis spread on variable rate 6.75% [14],[18],[25],[29],[56] 6.75% [9],[12],[16],[24],[33]
Investment, interest rate, paid in kind 10.60% [14],[18],[25],[29],[56] 11.10% [9],[12],[16],[24],[33]
Investment, Identifier [Axis]: RA Outdoors, LLC | Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [9],[12],[16],[24],[33] $ 919  
Fair value at ending balance $ 749 [14],[18],[25],[29],[56] $ 919 [9],[12],[16],[24],[33]
Basis spread on variable rate 6.75% [14],[18],[25],[29],[56] 6.75% [9],[12],[16],[24],[33]
Investment, interest rate, paid in kind 10.60% [14],[18],[25],[29],[56] 11.10% [9],[12],[16],[24],[33]
Investment, Identifier [Axis]: REP SEKO MERGER SUB LLC | Common Stock    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [10],[12] $ 0  
Fair value at ending balance $ 0 [8],[14] $ 0 [10],[12]
Investment owned, balance (in shares) 1,231 [8],[14] 1,231 [10],[12]
Investment, Identifier [Axis]: REP SEKO MERGER SUB LLC | First Lien Senior Secured Term Loan 1    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [12],[15],[16] $ 2,081  
Fair value at ending balance $ 1,791 [14],[17],[18] $ 2,081 [12],[15],[16]
Basis spread on variable rate 7.00% [14],[17],[18] 7.00% [12],[15],[16]
Investment, interest rate, paid in kind [14],[17],[18] 10.70%  
Interest rate, cash [12],[15],[16]   10.80%
Investment, Identifier [Axis]: REP SEKO MERGER SUB LLC | First Lien Senior Secured Term Loan 2    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[12],[15],[16] $ 258  
Fair value at ending balance $ 385 [14],[17],[18],[19] $ 258 [5],[12],[15],[16]
Basis spread on variable rate 10.50% [14],[17],[18],[19] 10.50% [5],[12],[15],[16]
Investment, interest rate, paid in kind [14],[17],[18],[19] 9.50%  
Interest rate, cash 4.70% [14],[17],[18],[19] 14.40% [5],[12],[15],[16]
Investment, Identifier [Axis]: REP SEKO MERGER SUB LLC | First Out Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [12],[15],[16] $ 1,112  
Fair value at ending balance $ 1,190 [14],[17],[18] $ 1,112 [12],[15],[16]
Basis spread on variable rate 10.00% [14],[17],[18] 10.00% [12],[15],[16]
Investment, interest rate, paid in kind [14],[17],[18] 13.70%  
Interest rate, cash [12],[15],[16]   13.90%
Investment, Identifier [Axis]: RKD Group, LLC | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[12],[15],[16] $ 12,039  
Fair value at ending balance $ 12,400 [14],[17],[18],[19] $ 12,039 [5],[12],[15],[16]
Basis spread on variable rate 5.25% [14],[17],[18],[19] 5.50% [5],[12],[15],[16]
Interest rate, cash 8.90% [14],[17],[18],[19] 9.40% [5],[12],[15],[16]
Investment, Identifier [Axis]: RKD Group, LLC | Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[12],[15],[16] $ (10)  
Fair value at ending balance $ (8) [14],[17],[18],[19] $ (10) [5],[12],[15],[16]
Basis spread on variable rate 5.25% [14],[17],[18],[19] 5.50% [5],[12],[15],[16]
Interest rate, cash 8.90% [14],[17],[18],[19] 9.40% [5],[12],[15],[16]
Investment, Identifier [Axis]: ROI Solutions LLC | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[12],[15],[16] $ 9,078  
Fair value at ending balance $ 8,122 [14],[17],[18],[19] $ 9,078 [5],[12],[15],[16]
Basis spread on variable rate 5.25% [14],[17],[18],[19] 5.00% [5],[12],[15],[16]
Interest rate, cash 9.00% [14],[17],[18],[19] 8.70% [5],[12],[15],[16]
Investment, Identifier [Axis]: ROI Solutions LLC | Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[12],[15],[16] $ (32)  
Fair value at ending balance $ (260) [14],[17],[18],[19] $ (32) [5],[12],[15],[16]
Basis spread on variable rate 5.25% [14],[17],[18],[19] 5.00% [5],[12],[15],[16]
Interest rate, cash 9.00% [14],[17],[18],[19] 8.70% [5],[12],[15],[16]
Investment, Identifier [Axis]: RPX Corporation | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [12],[16],[23] $ 21,484  
Fair value at ending balance $ 15,489 [14],[18],[22] $ 21,484 [12],[16],[23]
Basis spread on variable rate 5.50% [14],[18],[22] 5.50% [12],[16],[23]
Interest rate, cash 9.10% [14],[18],[22] 9.30% [12],[16],[23]
Investment, Identifier [Axis]: RPX Corporation | Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[12],[16],[23] $ (30)  
Fair value at ending balance $ (15) [14],[18],[19],[22] $ (30) [5],[12],[16],[23]
Basis spread on variable rate 5.50% [14],[18],[19],[22] 5.50% [5],[12],[16],[23]
Interest rate, cash 9.10% [14],[18],[19],[22] 9.30% [5],[12],[16],[23]
Investment, Identifier [Axis]: RTIC Subsidiary Holdings, LLC | Class A Preferred Stock    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [9],[10],[12] $ 0  
Fair value at ending balance $ 0 [8],[14] $ 0 [9],[10],[12]
Investment owned, balance (in shares) 145.347 [8],[14] 145.347 [9],[10],[12]
Investment, Identifier [Axis]: RTIC Subsidiary Holdings, LLC | Class B Preferred Stock    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [9],[10],[12] $ 0  
Fair value at ending balance $ 0 [8],[14] $ 0 [9],[10],[12]
Investment owned, balance (in shares) 145.347 [8],[14] 145.347 [9],[10],[12]
Investment, Identifier [Axis]: RTIC Subsidiary Holdings, LLC | Class C Preferred Stock    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [9],[10],[12] $ 36  
Fair value at ending balance $ 24 [8],[14] $ 36 [9],[10],[12]
Investment owned, balance (in shares) 7,844.03 [8],[14] 7,844.03 [9],[10],[12]
Investment, Identifier [Axis]: RTIC Subsidiary Holdings, LLC | Common Stock    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [9],[10],[12] $ 0  
Fair value at ending balance $ 0 [8],[14] $ 0 [9],[10],[12]
Investment owned, balance (in shares) 153 [8],[14] 153 [9],[10],[12]
Investment, Identifier [Axis]: Randys Holdings, Inc. | Common Stock    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [10],[12] $ 690  
Fair value at ending balance $ 654 [8],[14] $ 690 [10],[12]
Investment owned, balance (in shares) 5,333 [8],[14] 5,333 [10],[12]
Investment, Identifier [Axis]: Randys Holdings, Inc. | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[12],[16],[23] $ 12,552  
Fair value at ending balance $ 13,123 [14],[18],[19],[22] $ 12,552 [5],[12],[16],[23]
Basis spread on variable rate 5.00% [14],[18],[19],[22] 5.00% [5],[12],[16],[23]
Interest rate, cash 8.60% [14],[18],[19],[22] 8.70% [5],[12],[16],[23]
Investment, Identifier [Axis]: Randys Holdings, Inc. | Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[12],[16],[23] $ (19)  
Fair value at ending balance $ 194 [14],[18],[19],[22] $ (19) [5],[12],[16],[23]
Basis spread on variable rate 5.00% [14],[18],[19],[22] 5.00% [5],[12],[16],[23]
Interest rate, cash 8.60% [14],[18],[19],[22] 8.70% [5],[12],[16],[23]
Investment, Identifier [Axis]: Rapid Buyer LLC | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[12],[16],[33] $ 4,897  
Fair value at ending balance $ 5,330 [14],[18],[19],[29] $ 4,897 [5],[12],[16],[33]
Basis spread on variable rate 4.75% [14],[18],[19],[29] 4.75% [5],[12],[16],[33]
Interest rate, cash 8.40% [14],[18],[19],[29] 8.50% [5],[12],[16],[33]
Investment, Identifier [Axis]: Rapid Buyer LLC | LLC Units    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [10],[12] $ 377  
Fair value at ending balance $ 530 [8],[14] $ 377 [10],[12]
Investment owned, balance (in shares) 533 [8],[14] 533 [10],[12]
Investment, Identifier [Axis]: Rapid Buyer LLC | Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[12],[16],[33] $ (93)  
Fair value at ending balance $ (10) [14],[18],[19],[29] $ (93) [5],[12],[16],[33]
Basis spread on variable rate 4.75% [14],[18],[19],[29] 4.75% [5],[12],[16],[33]
Interest rate, cash 8.40% [14],[18],[19],[29] 8.50% [5],[12],[16],[33]
Investment, Identifier [Axis]: Real Chemistry Intermediate III, Inc. | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[12],[15],[16] $ 4,058  
Fair value at ending balance $ 4,331 [14],[17],[18],[19] $ 4,058 [5],[12],[15],[16]
Basis spread on variable rate 4.50% [14],[17],[18],[19] 4.50% [5],[12],[15],[16]
Interest rate, cash 8.20% [14],[17],[18],[19] 8.20% [5],[12],[15],[16]
Investment, Identifier [Axis]: Real Chemistry Intermediate III, Inc. | Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[12],[15],[16] $ (4)  
Fair value at ending balance $ (10) [14],[17],[18],[19] $ (4) [5],[12],[15],[16]
Basis spread on variable rate 4.50% [14],[17],[18],[19] 4.50% [5],[12],[15],[16]
Interest rate, cash 8.20% [14],[17],[18],[19] 8.20% [5],[12],[15],[16]
Investment, Identifier [Axis]: Recon Buyer LLC | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[12],[15],[16] $ 1,874  
Fair value at ending balance $ 1,513 [14],[17],[18],[19] $ 1,874 [5],[12],[15],[16]
Basis spread on variable rate 4.50% [14],[17],[18],[19] 4.75% [5],[12],[15],[16]
Interest rate, cash 8.20% [14],[17],[18],[19] 8.60% [5],[12],[15],[16]
Investment, Identifier [Axis]: Recon Buyer LLC | LLC Units    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [10],[12] $ 116  
Fair value at ending balance $ 123 [8],[14] $ 116 [10],[12]
Investment owned, balance (in shares) 116.2 [8],[14] 116.2 [10],[12]
Investment, Identifier [Axis]: Recon Buyer LLC | Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[12],[15],[16] $ (8)  
Fair value at ending balance $ (6) [14],[17],[18],[19] $ (8) [5],[12],[15],[16]
Basis spread on variable rate 4.50% [14],[17],[18],[19] 4.75% [5],[12],[15],[16]
Interest rate, cash 8.20% [14],[17],[18],[19] 8.60% [5],[12],[15],[16]
Investment, Identifier [Axis]: Recovery Point Systems, Inc. | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [12],[16],[33] $ 11,176  
Fair value at ending balance $ 11,118 [14],[18],[29] $ 11,176 [12],[16],[33]
Basis spread on variable rate 5.75% [14],[18],[29] 5.75% [12],[16],[33]
Interest rate, cash 9.60% [14],[18],[29] 9.80% [12],[16],[33]
Investment, Identifier [Axis]: Recovery Point Systems, Inc. | Partnership Equity    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [10],[12] $ 103  
Fair value at ending balance $ 112 [8],[14] $ 103 [10],[12]
Investment owned, balance (in shares) 187,235 [8],[14] 187,235 [10],[12]
Investment, Identifier [Axis]: Renovation Parent Holdings, LLC | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [12],[15],[16] $ 4,609  
Fair value at ending balance $ 4,648 [14],[17],[18] $ 4,609 [12],[15],[16]
Basis spread on variable rate 5.00% [14],[17],[18] 5.00% [12],[15],[16]
Interest rate, cash 8.80% [14],[17],[18] 9.00% [12],[15],[16]
Investment, Identifier [Axis]: Renovation Parent Holdings, LLC | Partnership Equity    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [10],[12] $ 160  
Fair value at ending balance $ 229 [8],[14] $ 160 [10],[12]
Investment owned, balance (in shares) 202,393.6 [8],[14] 202,393.6 [10],[12]
Investment, Identifier [Axis]: Resolute Investment Managers, Inc. | Common Stock    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [9],[10],[12] $ 0  
Fair value at ending balance $ 0 [8],[14] $ 0 [9],[10],[12]
Investment owned, balance (in shares) 51,428 [8],[14] 38,571 [9],[10],[12]
Investment, Identifier [Axis]: Riedel Beheer B.V. | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[12],[16],[20] $ 2,146  
Fair value at ending balance $ 2,371 [3],[14],[18],[21] $ 2,146 [7],[12],[16],[20]
Basis spread on variable rate 6.00% [3],[14],[18],[21] 6.25% [7],[12],[16],[20]
Interest rate, cash 8.30% [3],[14],[18],[21] 8.30% [7],[12],[16],[20]
Investment, Identifier [Axis]: Rocade Holdings LLC | Common LP Units    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance $ 3,596 [6],[12] $ 243
Gross Additions 0 [40] 0 [44]
Gross Reductions 0 [41] 0 [45]
Amount of Realized Gain (Loss) 0 0
Amount of Unrealized Gain (Loss) 1,091 3,353
Fair value at ending balance 4,687 [2],[14] 3,596 [6],[12]
Amount of Interest or Dividends Credited to Income $ 1,236 [42] $ 308 [46]
Investment owned, balance (in shares) 23.8 [2],[14] 23.8 [6],[12]
Investment, Identifier [Axis]: Rocade Holdings LLC | Preferred LP Units    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance $ 89,450 [5],[6],[12],[15] $ 83,000
Gross Additions 4,270 [40] 8,818 [44]
Gross Reductions (4,681) [41] (2,355) [45]
Amount of Realized Gain (Loss) 0 0
Amount of Unrealized Gain (Loss) 2 (13)
Fair value at ending balance 89,041 [2],[14],[17] 89,450 [5],[6],[12],[15]
Amount of Interest or Dividends Credited to Income $ 4,270 [42] $ 8,818 [46]
Basis spread on variable rate 6.00% [2],[14],[17] 6.00% [5],[6],[12],[15]
Investment, interest rate, paid in kind [5],[6],[12],[15]   9.90%
Investment owned, balance (in shares) 71,000 [2],[14],[17] 71,000 [5],[6],[12],[15]
Interest rate, cash [2],[14],[17] 9.70%  
Investment, Identifier [Axis]: Rocade Holdings LLC | Second Lien Secured Loan | Funded    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance $ 2,900  
Fair value at ending balance 12,200 $ 2,900
Investment, Identifier [Axis]: Rocade Holdings LLC | Second Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance 2,667 [5],[6],[12],[15],[16] 0
Gross Additions 9,282 [40] 2,671 [44]
Gross Reductions 0 [41] 0 [45]
Amount of Realized Gain (Loss) 0 0
Amount of Unrealized Gain (Loss) (19) (4)
Fair value at ending balance 11,930 [2],[14],[17],[18],[19] 2,667 [5],[6],[12],[15],[16]
Amount of Interest or Dividends Credited to Income $ 329 [42] $ 38 [46]
Basis spread on variable rate 8.00% [2],[14],[17],[18],[19] 8.00% [5],[6],[12],[15],[16]
Interest rate, cash 11.70% [2],[14],[17],[18],[19] 11.90% [5],[6],[12],[15],[16]
Investment, Identifier [Axis]: Rock Labor LLC | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [12],[16],[23] $ 6,471  
Fair value at ending balance $ 6,438 [14],[18],[22] $ 6,471 [12],[16],[23]
Basis spread on variable rate 5.50% [14],[18],[22] 5.50% [12],[16],[23]
Interest rate, cash 9.20% [14],[18],[22] 9.20% [12],[16],[23]
Investment, Identifier [Axis]: Rock Labor LLC | LLC Units    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [10],[12] $ 1,380  
Fair value at ending balance $ 1,057 [8],[14] $ 1,380 [10],[12]
Investment owned, balance (in shares) 233,871 [8],[14] 233,871 [10],[12]
Investment, Identifier [Axis]: Rock Labor LLC | Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[12],[16],[23] $ 0  
Fair value at ending balance $ 0 [14],[18],[19],[22] $ 0 [5],[12],[16],[23]
Basis spread on variable rate 5.50% [14],[18],[19],[22] 5.50% [5],[12],[16],[23]
Interest rate, cash 9.20% [14],[18],[19],[22] 9.20% [5],[12],[16],[23]
Investment, Identifier [Axis]: Ruby Bidco Pty Ltd | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[7],[12],[16],[34] $ 1,654  
Fair value at ending balance $ 1,729 [3],[14],[18],[19],[35] $ 1,654 [5],[7],[12],[16],[34]
Basis spread on variable rate 5.25% [3],[14],[18],[19],[35] 5.25% [5],[7],[12],[16],[34]
Interest rate, cash 9.80% [3],[14],[18],[19],[35] 9.00% [5],[7],[12],[16],[34]
Investment, Identifier [Axis]: SBP Holdings LP | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[12],[16],[23] $ 8,615  
Fair value at ending balance $ 8,584 [14],[18],[19],[22] $ 8,615 [5],[12],[16],[23]
Basis spread on variable rate 5.00% [14],[18],[19],[22] 5.00% [5],[12],[16],[23]
Interest rate, cash 8.60% [14],[18],[19],[22] 8.70% [5],[12],[16],[23]
Investment, Identifier [Axis]: SBP Holdings LP | Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[12],[16],[23] $ (3)  
Fair value at ending balance $ 0 [14],[18],[19],[22] $ (3) [5],[12],[16],[23]
Basis spread on variable rate 5.00% [14],[18],[19],[22] 5.00% [5],[12],[16],[23]
Interest rate, cash 8.60% [14],[18],[19],[22] 8.70% [5],[12],[16],[23]
Investment, Identifier [Axis]: SCP CDH Buyer, Inc. | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[12],[15],[16] $ 6,885  
Fair value at ending balance $ 8,295 [14],[17],[18],[19] $ 6,885 [5],[12],[15],[16]
Basis spread on variable rate 4.50% [14],[17],[18],[19] 4.50% [5],[12],[15],[16]
Interest rate, cash 8.20% [14],[17],[18],[19] 8.20% [5],[12],[15],[16]
Investment, Identifier [Axis]: SCP CDH Buyer, Inc. | Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[12],[15],[16] $ (10)  
Fair value at ending balance $ (8) [14],[17],[18],[19] $ (10) [5],[12],[15],[16]
Basis spread on variable rate 4.50% [14],[17],[18],[19] 4.50% [5],[12],[15],[16]
Interest rate, cash 8.20% [14],[17],[18],[19] 8.20% [5],[12],[15],[16]
Investment, Identifier [Axis]: SCP Medical Products, LLC. | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [12],[15],[16] $ 2,022  
Fair value at ending balance $ 2,007 [14],[17],[18] $ 2,022 [12],[15],[16]
Basis spread on variable rate 4.75% [14],[17],[18] 4.75% [12],[15],[16]
Interest rate, cash 8.50% [14],[17],[18] 8.40% [12],[15],[16]
Investment, Identifier [Axis]: SCP Medical Products, LLC. | LLC Units    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [10],[12] $ 53  
Fair value at ending balance $ 44 [8],[14] $ 53 [10],[12]
Investment owned, balance (in shares) 393.3 [8],[14] 393.3 [10],[12]
Investment, Identifier [Axis]: SCP Medical Products, LLC. | Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[12],[15],[16] $ (1)  
Fair value at ending balance $ 84 [14],[17],[18],[19] $ (1) [5],[12],[15],[16]
Basis spread on variable rate 4.75% [14],[17],[18],[19] 4.75% [5],[12],[15],[16]
Interest rate, cash 8.50% [14],[17],[18],[19] 8.40% [5],[12],[15],[16]
Investment, Identifier [Axis]: SPATCO Energy Solutions, LLC | Common Stock    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [10],[12] $ 309  
Fair value at ending balance $ 249 [8],[14] $ 309 [10],[12]
Investment owned, balance (in shares) 285,839 [8],[14] 280,957 [10],[12]
Investment, Identifier [Axis]: SPATCO Energy Solutions, LLC | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[12],[15],[16] $ 7,374  
Fair value at ending balance $ 7,423 [14],[17],[18],[19] $ 7,374 [5],[12],[15],[16]
Basis spread on variable rate 5.00% [14],[17],[18],[19] 5.00% [5],[12],[15],[16]
Interest rate, cash 8.70% [14],[17],[18],[19] 8.90% [5],[12],[15],[16]
Investment, Identifier [Axis]: SPATCO Energy Solutions, LLC | Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[12],[15],[16] $ (12)  
Fair value at ending balance $ 263 [14],[17],[18],[19] $ (12) [5],[12],[15],[16]
Basis spread on variable rate 5.00% [14],[17],[18],[19] 5.00% [5],[12],[15],[16]
Interest rate, cash 8.70% [14],[17],[18],[19] 8.90% [5],[12],[15],[16]
Investment, Identifier [Axis]: SRS Acquiom Holdings LLC | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [14],[17],[18] $ 4,400  
Basis spread on variable rate [14],[17],[18] 4.75%  
Interest rate, cash [14],[17],[18] 8.40%  
Investment, Identifier [Axis]: SRS Acquiom Holdings LLC | Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [14],[17],[18],[19] $ (8)  
Basis spread on variable rate [14],[17],[18],[19] 4.75%  
Interest rate, cash [14],[17],[18],[19] 8.40%  
Investment, Identifier [Axis]: SSCP Pegasus Midco Limited | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[12],[16],[30] $ 7,081  
Fair value at ending balance $ 1,715 [3],[14],[18],[19],[26] $ 7,081 [7],[12],[16],[30]
Basis spread on variable rate 5.25% [3],[14],[18],[19],[26] 6.00% [7],[12],[16],[30]
Interest rate, cash 9.00% [3],[14],[18],[19],[26] 10.10% [7],[12],[16],[30]
Investment, Identifier [Axis]: SSCP Spring Bidco 3 Limited | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[12],[16],[31] $ 1,028  
Fair value at ending balance $ 1,013 [3],[14],[18],[32] $ 1,028 [7],[12],[16],[31]
Basis spread on variable rate 6.45% [3],[14],[18],[32] 6.45% [7],[12],[16],[31]
Interest rate, cash 10.20% [3],[14],[18],[32] 10.40% [7],[12],[16],[31]
Investment, Identifier [Axis]: SVI International LLC | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [12],[15],[16] $ 639  
Fair value at ending balance [12],[15],[16]   $ 639
Basis spread on variable rate [12],[15],[16]   6.75%
Interest rate, cash [12],[15],[16]   10.70%
Investment, Identifier [Axis]: SVI International LLC | LLC Units    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [12] 378  
Fair value at ending balance $ 356 [14] $ 378 [12]
Investment owned, balance (in shares) 207,921 [14] 207,921 [12]
Investment, Identifier [Axis]: SVI International LLC | Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[12],[15],[16] $ 0  
Fair value at ending balance [5],[12],[15],[16]   $ 0
Basis spread on variable rate [5],[12],[15],[16]   6.75%
Interest rate, cash [5],[12],[15],[16]   10.70%
Investment, Identifier [Axis]: Saab Purchaser, Inc. | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [12],[15],[16] 13,505  
Fair value at ending balance $ 13,423 [14],[17],[18] $ 13,505 [12],[15],[16]
Basis spread on variable rate 4.50% [14],[17],[18] 4.75% [12],[15],[16]
Interest rate, cash 8.20% [14],[17],[18] 8.40% [12],[15],[16]
Investment, Identifier [Axis]: Saab Purchaser, Inc. | Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[12],[15],[16] $ (22)  
Fair value at ending balance $ (24) [14],[17],[18],[19] $ (22) [5],[12],[15],[16]
Basis spread on variable rate 4.50% [14],[17],[18],[19] 4.75% [5],[12],[15],[16]
Interest rate, cash 8.20% [14],[17],[18],[19] 8.40% [5],[12],[15],[16]
Investment, Identifier [Axis]: Safety Products Holdings, LLC | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [12],[15],[16] $ 9,422  
Fair value at ending balance $ 8,709 [14],[17],[18] $ 9,422 [12],[15],[16]
Basis spread on variable rate 4.50% [14],[17],[18] 4.75% [12],[15],[16]
Interest rate, cash 8.20% [14],[17],[18] 8.60% [12],[15],[16]
Investment, Identifier [Axis]: Safety Products Holdings, LLC | Preferred Stock    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [10],[12] $ 500  
Fair value at ending balance $ 602 [8],[14] $ 500 [10],[12]
Investment owned, balance (in shares) 378.7 [8],[14] 378.7 [10],[12]
Investment, Identifier [Axis]: Sanoptis S.A.R.L. | First Lien Senior Secured Term Loan 1    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[7],[12],[16],[20] $ 4,258  
Fair value at ending balance $ 5,624 [3],[14],[18],[19],[21] $ 4,258 [5],[7],[12],[16],[20]
Basis spread on variable rate 4.75% [3],[14],[18],[19],[21] 5.00% [5],[7],[12],[16],[20]
Interest rate, cash 6.80% [3],[14],[18],[19],[21] 7.00% [5],[7],[12],[16],[20]
Investment, Identifier [Axis]: Sanoptis S.A.R.L. | First Lien Senior Secured Term Loan 2    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[12],[16],[68] $ 3,275  
Fair value at ending balance $ 3,902 [3],[14],[18],[69] $ 3,275 [7],[12],[16],[68]
Basis spread on variable rate 4.75% [3],[14],[18],[69] 5.00% [7],[12],[16],[68]
Interest rate, cash 4.80% [3],[14],[18],[69] 5.00% [7],[12],[16],[68]
Investment, Identifier [Axis]: Sansidor BV | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[12],[16],[20] $ 1,059  
Fair value at ending balance $ 1,048 [3],[14],[18],[21] $ 1,059 [7],[12],[16],[20]
Basis spread on variable rate 5.25% [3],[14],[18],[21] 5.00% [7],[12],[16],[20]
Interest rate, cash 7.50% [3],[14],[18],[21] 7.00% [7],[12],[16],[20]
Investment, Identifier [Axis]: Sapphire Bidco S.A.R.L. | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[7],[12],[16],[20] $ 1,793  
Fair value at ending balance [5],[7],[12],[16],[20]   $ 1,793
Basis spread on variable rate [5],[7],[12],[16],[20]   5.00%
Interest rate, cash [5],[7],[12],[16],[20]   7.00%
Investment, Identifier [Axis]: Sapphire Bidco S.A.R.L. | First Lien Senior Secured Term Loan 1    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [3],[14],[18],[19],[21] $ 1,767  
Basis spread on variable rate [3],[14],[18],[19],[21] 5.00%  
Interest rate, cash [3],[14],[18],[19],[21] 7.20%  
Investment, Identifier [Axis]: Sapphire Bidco S.A.R.L. | First Lien Senior Secured Term Loan 2    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [3],[14],[17],[18] $ 44  
Basis spread on variable rate [3],[14],[17],[18] 5.00%  
Interest rate, cash [3],[14],[17],[18] 8.70%  
Investment, Identifier [Axis]: Scaled Agile, Inc. | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [12],[15],[16] $ 1,558  
Fair value at ending balance $ 796 [14],[18],[25],[29] $ 1,558 [12],[15],[16]
Basis spread on variable rate 5.50% [14],[18],[25],[29] 2.25% [12],[15],[16]
Investment, interest rate, paid in kind 9.30% [14],[18],[25],[29] 3.80% [12],[15],[16]
Interest rate, cash [12],[15],[16]   6.00%
Investment, Identifier [Axis]: Scaled Agile, Inc. | Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [12],[15],[16] $ 294  
Fair value at ending balance $ 152 [14],[18],[25],[29] $ 294 [12],[15],[16]
Basis spread on variable rate 5.50% [14],[18],[25],[29] 2.25% [12],[15],[16]
Investment, interest rate, paid in kind 9.30% [14],[18],[25],[29] 3.80% [12],[15],[16]
Interest rate, cash [12],[15],[16]   6.00%
Investment, Identifier [Axis]: Scout Bidco B.V. | First Lien Senior Secured Term Loan 1    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[12],[16],[27] $ 3,456  
Fair value at ending balance $ 3,525 [3],[14],[18],[28] $ 3,456 [7],[12],[16],[27]
Basis spread on variable rate 5.75% [3],[14],[18],[28] 5.75% [7],[12],[16],[27]
Interest rate, cash 8.00% [3],[14],[18],[28] 7.80% [7],[12],[16],[27]
Investment, Identifier [Axis]: Scout Bidco B.V. | First Lien Senior Secured Term Loan 2    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[12],[16],[33] $ 408  
Fair value at ending balance $ 428 [3],[14],[18],[29] $ 408 [7],[12],[16],[33]
Basis spread on variable rate 5.75% [3],[14],[18],[29] 5.75% [7],[12],[16],[33]
Interest rate, cash 9.30% [3],[14],[18],[29] 10.00% [7],[12],[16],[33]
Investment, Identifier [Axis]: Scout Bidco B.V. | Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[7],[12],[16],[27] $ 364  
Fair value at ending balance $ 403 [3],[14],[18],[19],[21] $ 364 [5],[7],[12],[16],[27]
Basis spread on variable rate 5.50% [3],[14],[18],[19],[21] 5.50% [5],[7],[12],[16],[27]
Interest rate, cash 7.80% [3],[14],[18],[19],[21] 7.50% [5],[7],[12],[16],[27]
Investment, Identifier [Axis]: Screenvision, LLC | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [12],[15],[16] $ 5,095  
Fair value at ending balance $ 5,079 [14],[17],[18] $ 5,095 [12],[15],[16]
Basis spread on variable rate 5.00% [14],[17],[18] 5.00% [12],[15],[16]
Interest rate, cash 8.70% [14],[17],[18] 8.90% [12],[15],[16]
Investment, Identifier [Axis]: Screenvision, LLC | Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[12],[15],[16] $ (11)  
Fair value at ending balance $ (9) [14],[17],[18],[19] $ (11) [5],[12],[15],[16]
Basis spread on variable rate 5.00% [14],[17],[18],[19] 5.00% [5],[12],[15],[16]
Interest rate, cash 8.70% [14],[17],[18],[19] 8.90% [5],[12],[15],[16]
Investment, Identifier [Axis]: Screenvision, LLC | Second Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [12],[15],[16] $ 32,534  
Fair value at ending balance $ 32,502 [14],[17],[18] $ 32,534 [12],[15],[16]
Basis spread on variable rate 8.50% [14],[17],[18] 8.50% [12],[15],[16]
Interest rate, cash 12.20% [14],[17],[18] 12.40% [12],[15],[16]
Investment, Identifier [Axis]: Security Holdings B.V | Bridge Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance $ 6,997 $ 6,655
Gross Additions [48]   342
Gross Reductions [49]   0
Amount of Realized Gain (Loss)   0
Amount of Unrealized Gain (Loss)   0
Fair value at ending balance   6,997
Amount of Interest or Dividends Credited to Income [50]   $ 342
Investment, interest rate, paid in kind   5.00%
Investment, Identifier [Axis]: Security Holdings B.V | Common Stock Series A    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance 436 $ 399
Gross Additions [48]   0
Gross Reductions [49]   0
Amount of Realized Gain (Loss)   0
Amount of Unrealized Gain (Loss)   37
Fair value at ending balance   436
Amount of Interest or Dividends Credited to Income [50]   $ 0
Investment owned, balance (in shares)   17,100
Investment, Identifier [Axis]: Security Holdings B.V | Common Stock Series B    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance 40,702 $ 37,296
Gross Additions [48]   0
Gross Reductions [49]   0
Amount of Realized Gain (Loss)   0
Amount of Unrealized Gain (Loss)   3,406
Fair value at ending balance   40,702
Amount of Interest or Dividends Credited to Income [50]   $ 2,817
Investment owned, balance (in shares)   1,236
Investment, Identifier [Axis]: Security Holdings B.V | Senior Unsecured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance 2,909 $ 2,293
Gross Additions [48]   299
Gross Reductions [49]   0
Amount of Realized Gain (Loss)   0
Amount of Unrealized Gain (Loss)   317
Fair value at ending balance   2,909
Amount of Interest or Dividends Credited to Income [50]   $ 474
Investment, interest rate, paid in kind   9.00%
Interest rate, cash   6.00%
Investment, Identifier [Axis]: Security Holdings B.V | Senior Unsecured Term Loan 2    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance 11,565 $ 11,191
Gross Additions [48]   374
Gross Reductions [49]   0
Amount of Realized Gain (Loss)   0
Amount of Unrealized Gain (Loss)   0
Fair value at ending balance   11,565
Amount of Interest or Dividends Credited to Income [50]   $ 360
Investment, interest rate, paid in kind   3.10%
Investment, Identifier [Axis]: Security Holdings B.V. | Bridge Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[12],[57],[58] 6,997  
Gross Additions [59] 176  
Gross Reductions [60] 0  
Amount of Realized Gain (Loss) 0  
Amount of Unrealized Gain (Loss) 0  
Fair value at ending balance 7,173 [3],[14],[62] $ 6,997 [7],[12],[57],[58]
Amount of Interest or Dividends Credited to Income [61] $ 176  
Investment, interest rate, paid in kind 5.00% [3],[14],[62] 5.00% [7],[12],[57],[58]
Investment, Identifier [Axis]: Security Holdings B.V. | Common Stock Series A    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[10],[12],[57],[58] $ 436  
Gross Additions [59] 0  
Gross Reductions [60] 0  
Amount of Realized Gain (Loss) 0  
Amount of Unrealized Gain (Loss) 11  
Fair value at ending balance 447 [3],[8],[14] $ 436 [7],[10],[12],[57],[58]
Amount of Interest or Dividends Credited to Income [61] $ 0  
Investment owned, balance (in shares) 17,100 [3],[8],[14] 17,100 [7],[10],[12],[57],[58]
Investment, Identifier [Axis]: Security Holdings B.V. | Common Stock Series B    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[12],[57],[58] $ 40,702  
Gross Additions [59] 0  
Gross Reductions [60] 0  
Amount of Realized Gain (Loss) 0  
Amount of Unrealized Gain (Loss) 1,039  
Fair value at ending balance 41,741 [3],[8],[14] $ 40,702 [7],[12],[57],[58]
Amount of Interest or Dividends Credited to Income [61] $ 0  
Investment owned, balance (in shares) 1,236 [3],[8],[14] 1,236 [7],[12],[57],[58]
Investment, Identifier [Axis]: Security Holdings B.V. | Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[7],[12],[57],[58] $ 6,225  
Gross Additions [59] 5,179  
Gross Reductions [60] 0  
Amount of Realized Gain (Loss) (6)  
Amount of Unrealized Gain (Loss) (414)  
Fair value at ending balance 10,984 [3],[14],[19],[62] $ 6,225 [5],[7],[12],[57],[58]
Amount of Interest or Dividends Credited to Income [61] $ 279  
Investment, interest rate, paid in kind [3],[14],[19],[62] 6.00%  
Interest rate, cash [5],[7],[12],[57],[58]   6.00%
Investment, Identifier [Axis]: Security Holdings B.V. | Senior Subordinated Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[12],[57],[58] $ 11,565  
Gross Additions [59] 182  
Gross Reductions [60] 0  
Amount of Realized Gain (Loss) 0  
Amount of Unrealized Gain (Loss) 0  
Fair value at ending balance 11,747 [3],[14],[62] $ 11,565 [7],[12],[57],[58]
Amount of Interest or Dividends Credited to Income [61] $ 182  
Investment, interest rate, paid in kind 3.10% [3],[14],[62] 3.10% [7],[12],[57],[58]
Investment, Identifier [Axis]: Security Holdings B.V. | Senior Unsecured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[12],[57],[58] $ 2,909  
Gross Additions [59] 218  
Gross Reductions [60] 0  
Amount of Realized Gain (Loss) 0  
Amount of Unrealized Gain (Loss) (78)  
Fair value at ending balance 3,049 [3],[14],[62] $ 2,909 [7],[12],[57],[58]
Amount of Interest or Dividends Credited to Income [61] $ 226  
Investment, interest rate, paid in kind 15.00% [3],[14],[62] 9.00% [7],[12],[57],[58]
Interest rate, cash [7],[12],[57],[58]   6.00%
Investment, Identifier [Axis]: Security Holdings B.V| Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance $ 6,225 $ 5,333
Gross Additions [48]   165
Gross Reductions [49]   (3)
Amount of Realized Gain (Loss)   2
Amount of Unrealized Gain (Loss)   728
Fair value at ending balance   6,225
Amount of Interest or Dividends Credited to Income [50]   $ 379
Interest rate, cash   6.00%
Investment, Identifier [Axis]: Selenium Designated Activity Company | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[12],[16],[20] 3,163  
Fair value at ending balance $ 3,121 [3],[14],[18],[28] $ 3,163 [7],[12],[16],[20]
Basis spread on variable rate 5.13% [3],[14],[18],[28] 5.13% [7],[12],[16],[20]
Interest rate, cash 7.30% [3],[14],[18],[28] 7.20% [7],[12],[16],[20]
Investment, Identifier [Axis]: Serta Simmons Bedding LLC | Common Stock    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [10] $ 1,009  
Fair value at ending balance $ 855 [8] $ 1,009 [10]
Investment owned, balance (in shares) 109,127 [8] 109,127 [10]
Investment, Identifier [Axis]: Shelf Bidco Ltd | Common Stock    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[9],[10],[12] $ 4,704  
Fair value at ending balance $ 4,692 [3],[8],[14] $ 4,704 [7],[9],[10],[12]
Investment owned, balance (in shares) 1,200,000 [3],[8],[14] 1,200,000 [7],[9],[10],[12]
Investment, Identifier [Axis]: Shelf Bidco Ltd | Second Out Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[12],[15],[16] $ 12,042  
Fair value at ending balance $ 11,986 [3],[14],[17],[18] $ 12,042 [7],[12],[15],[16]
Basis spread on variable rate 4.75% [3],[14],[17],[18] 5.00% [7],[12],[15],[16]
Interest rate, cash 8.40% [3],[14],[17],[18] 8.90% [7],[12],[15],[16]
Investment, Identifier [Axis]: Sierra Senior Loan Strategy JV I LLC | 89.01% Member Interest    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [4],[6],[7],[9] $ 16,404  
Gross Additions [40] 0  
Gross Reductions [41] (16,437)  
Amount of Realized Gain (Loss) 0  
Amount of Unrealized Gain (Loss) 33  
Fair value at ending balance 0 [1],[2],[3],[8] $ 16,404 [4],[6],[7],[9]
Amount of Interest or Dividends Credited to Income [42] 223  
Investment, Identifier [Axis]: Sierra Senior Loan Strategy JV I LLC, Member Interest    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance 16,404 41,453
Gross Additions [44]   0
Gross Reductions [45]   (20,472)
Amount of Realized Gain (Loss)   0
Amount of Unrealized Gain (Loss)   (4,577)
Fair value at ending balance   16,404
Amount of Interest or Dividends Credited to Income [46]   7,121
Investment, Identifier [Axis]: Sinari Invest | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[7],[12],[16],[20] 1,872  
Fair value at ending balance $ 1,717 [3],[14],[18],[19],[21] $ 1,872 [5],[7],[12],[16],[20]
Basis spread on variable rate 6.50% [3],[14],[18],[19],[21] 6.50% [5],[7],[12],[16],[20]
Interest rate, cash 9.10% [3],[14],[18],[19],[21] 8.50% [5],[7],[12],[16],[20]
Investment, Identifier [Axis]: Sisu Acquisitionco., Inc. | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [12],[15],[16] $ 7,176  
Fair value at ending balance $ 7,117 [14],[17],[18] $ 7,176 [12],[15],[16]
Basis spread on variable rate 5.00% [14],[17],[18] 5.25% [12],[15],[16]
Interest rate, cash 8.80% [14],[17],[18] 9.00% [12],[15],[16]
Investment, Identifier [Axis]: Skyvault Holdings LLC | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance $ 16,020 [5],[6],[12] $ 3,586
Gross Additions 123 [40] 12,615 [44]
Gross Reductions 0 [41] (181) [45]
Amount of Realized Gain (Loss) 0 0
Amount of Unrealized Gain (Loss) 0 0
Fair value at ending balance 16,143 [2],[14] 16,020 [5],[6],[12]
Amount of Interest or Dividends Credited to Income $ 971 [42] $ 1,409 [46]
Investment, interest rate, paid in kind   12.00%
Interest rate, cash 12.00% [2],[14] 12.00% [5],[6],[12]
Investment, Identifier [Axis]: Skyvault Holdings LLC | LLC Units    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance $ 5,339 [5],[6],[10],[12] $ 1,195
Gross Additions 41 [40] 4,153 [44]
Gross Reductions (2,140) [41] 0 [45]
Amount of Realized Gain (Loss) 0 0
Amount of Unrealized Gain (Loss) 1,763 (9)
Fair value at ending balance 5,003 [2],[8],[14] 5,339 [5],[6],[10],[12]
Amount of Interest or Dividends Credited to Income $ 1,899 [42] $ 0 [46]
Investment owned, balance (in shares) 5,381,304.8 [2],[8],[14] 5,340,186.4 [5],[6],[10],[12]
Investment, Identifier [Axis]: SmartShift Group, Inc. | Common Stock    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [10],[12] $ 594  
Fair value at ending balance $ 562 [8],[14] $ 594 [10],[12]
Investment owned, balance (in shares) 275 [8],[14] 275 [10],[12]
Investment, Identifier [Axis]: SmartShift Group, Inc. | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [12],[16],[33] $ 12,814  
Fair value at ending balance $ 12,781 [14],[18],[29] $ 12,814 [12],[16],[33]
Basis spread on variable rate 5.00% [14],[18],[29] 5.00% [12],[16],[33]
Interest rate, cash 8.70% [14],[18],[29] 8.60% [12],[16],[33]
Investment, Identifier [Axis]: SmartShift Group, Inc. | Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[12],[16],[33] $ 0  
Fair value at ending balance $ 0 [14],[18],[19],[29] $ 0 [5],[12],[16],[33]
Basis spread on variable rate 5.00% [14],[18],[19],[29] 5.00% [5],[12],[16],[33]
Interest rate, cash 8.70% [14],[18],[19],[29] 8.60% [5],[12],[16],[33]
Investment, Identifier [Axis]: Smile Brands Group Inc. | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [12],[15],[16] $ 4,577  
Fair value at ending balance $ 4,193 [14],[17],[18] $ 4,577 [12],[15],[16]
Basis spread on variable rate 6.00% [14],[17],[18] 6.00% [12],[15],[16]
Investment, interest rate, paid in kind [14],[17],[18] 1.50%  
Interest rate, cash 8.30% [14],[17],[18] 9.90% [12],[15],[16]
Investment, Identifier [Axis]: Solo Buyer, L.P. | Common Equity    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [10],[12] $ 269  
Fair value at ending balance $ 248 [8],[14] $ 269 [10],[12]
Investment owned, balance (in shares) 516,399 [8],[14] 516,399 [10],[12]
Investment, Identifier [Axis]: Solo Buyer, L.P. | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [12],[15],[16] $ 14,798  
Fair value at ending balance $ 14,601 [14],[17],[18] $ 14,798 [12],[15],[16]
Basis spread on variable rate 6.25% [14],[17],[18] 6.25% [12],[15],[16]
Interest rate, cash 9.90% [14],[17],[18] 10.00% [12],[15],[16]
Investment, Identifier [Axis]: Solo Buyer, L.P. | Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[12],[15],[16] $ 814  
Fair value at ending balance $ 765 [14],[17],[18],[19] $ 814 [5],[12],[15],[16]
Basis spread on variable rate 6.25% [14],[17],[18],[19] 6.25% [5],[12],[15],[16]
Interest rate, cash 9.90% [14],[17],[18],[19] 10.00% [5],[12],[15],[16]
Investment, Identifier [Axis]: Sonicwall US Holdings Inc | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [15],[16] $ 1,844  
Fair value at ending balance [15],[16]   $ 1,844
Basis spread on variable rate [15],[16]   5.50%
Interest rate, cash [15],[16]   9.20%
Investment, Identifier [Axis]: Sonicwall US Holdings Inc | First Lien Senior Secured Term Loan 1    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [17],[18] $ 783  
Basis spread on variable rate [17],[18] 5.00%  
Interest rate, cash [17],[18] 8.70%  
Investment, Identifier [Axis]: Sonicwall US Holdings Inc | First Lien Senior Secured Term Loan 2    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [17],[18] $ 1,101  
Basis spread on variable rate [17],[18] 5.50%  
Interest rate, cash [17],[18] 9.20%  
Investment, Identifier [Axis]: Sound Point CLO XX, Ltd. | Subordinated Structured Notes    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[9],[10] $ 21  
Fair value at ending balance [7],[9],[10]   $ 21
Investment, Identifier [Axis]: Sparus Holdings, LLC (f/k/a Sparus Holdings, Inc.) | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [12],[15],[16] 2,655  
Fair value at ending balance $ 2,618 [14],[17],[18] $ 2,655 [12],[15],[16]
Basis spread on variable rate 4.50% [14],[17],[18] 4.75% [12],[15],[16]
Interest rate, cash 8.20% [14],[17],[18] 8.40% [12],[15],[16]
Investment, Identifier [Axis]: Sparus Holdings, LLC (f/k/a Sparus Holdings, Inc.) | Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[12],[15],[16] $ (1)  
Fair value at ending balance $ 0 [14],[17],[18],[19] $ (1) [5],[12],[15],[16]
Basis spread on variable rate 4.50% [14],[17],[18],[19] 4.75% [5],[12],[15],[16]
Interest rate, cash 8.20% [14],[17],[18],[19] 8.40% [5],[12],[15],[16]
Investment, Identifier [Axis]: Spatial Business Systems LLC | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [12],[15],[16] $ 7,218  
Fair value at ending balance [12],[15],[16]   $ 7,218
Basis spread on variable rate [12],[15],[16]   4.75%
Interest rate, cash [12],[15],[16]   8.40%
Investment, Identifier [Axis]: Spatial Business Systems LLC | Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[12],[15],[16] (4)  
Fair value at ending balance [5],[12],[15],[16]   $ (4)
Basis spread on variable rate [5],[12],[15],[16]   4.75%
Interest rate, cash [5],[12],[15],[16]   8.40%
Investment, Identifier [Axis]: Stage 3 Holdco LLC | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [14],[18],[19],[22] $ 2,886  
Basis spread on variable rate [14],[18],[19],[22] 5.50%  
Interest rate, cash [14],[18],[19],[22] 9.10%  
Investment, Identifier [Axis]: Stage 3 Holdco LLC | Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [14],[18],[19],[22] $ (7)  
Basis spread on variable rate [14],[18],[19],[22] 5.50%  
Interest rate, cash [14],[18],[19],[22] 9.10%  
Investment, Identifier [Axis]: Starnmeer B.V. | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[12],[16],[33] $ 2,475  
Fair value at ending balance $ 2,480 [3],[14],[18],[29] $ 2,475 [7],[12],[16],[33]
Basis spread on variable rate 5.25% [3],[14],[18],[29] 5.25% [7],[12],[16],[33]
Interest rate, cash 9.00% [3],[14],[18],[29] 9.40% [7],[12],[16],[33]
Investment, Identifier [Axis]: Sunrise Acquisition Bidco Limited | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[7],[12],[16],[30] $ 1,875  
Fair value at ending balance $ 2,598 [3],[14],[18],[19],[26] $ 1,875 [5],[7],[12],[16],[30]
Basis spread on variable rate 5.25% [3],[14],[18],[19],[26] 5.25% [5],[7],[12],[16],[30]
Interest rate, cash 9.00% [3],[14],[18],[19],[26] 9.20% [5],[7],[12],[16],[30]
Investment, Identifier [Axis]: Superjet Buyer, LLC | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[12],[15],[16] $ 4,249  
Fair value at ending balance $ 4,505 [14],[17],[18] $ 4,249 [5],[12],[15],[16]
Basis spread on variable rate 5.05% [14],[17],[18] 5.00% [5],[12],[15],[16]
Interest rate, cash 8.70% [14],[17],[18] 8.80% [5],[12],[15],[16]
Investment, Identifier [Axis]: Superjet Buyer, LLC | Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[12],[15],[16] $ (13)  
Fair value at ending balance $ (22) [14],[17],[18],[19] $ (13) [5],[12],[15],[16]
Basis spread on variable rate 5.05% [14],[17],[18],[19] 5.00% [5],[12],[15],[16]
Interest rate, cash 8.70% [14],[17],[18],[19] 8.80% [5],[12],[15],[16]
Investment, Identifier [Axis]: Surface Finishing Technologies Inc. | Common Stock    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [8],[14] $ 192  
Investment owned, balance (in shares) [8],[14] 192,455  
Investment, Identifier [Axis]: Surface Finishing Technologies Inc. | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [14],[18],[19],[29] $ 7,100  
Basis spread on variable rate [14],[18],[19],[29] 4.75%  
Interest rate, cash [14],[18],[19],[29] 8.50%  
Investment, Identifier [Axis]: Surface Finishing Technologies Inc. | Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [14],[18],[19],[29] $ (18)  
Basis spread on variable rate [14],[18],[19],[29] 4.75%  
Interest rate, cash [14],[18],[19],[29] 8.50%  
Investment, Identifier [Axis]: Swoop Intermediate III, Inc. | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[12],[16],[23] $ 1,977  
Fair value at ending balance $ 4,280 [14],[18],[19],[22] $ 1,977 [5],[12],[16],[23]
Basis spread on variable rate 4.50% [14],[18],[19],[22] 4.50% [5],[12],[16],[23]
Interest rate, cash 8.20% [14],[18],[19],[22] 8.20% [5],[12],[16],[23]
Investment, Identifier [Axis]: Swoop Intermediate III, Inc. | Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[12],[16],[23] $ 0  
Fair value at ending balance $ 0 [14],[18],[19],[22] $ 0 [5],[12],[16],[23]
Basis spread on variable rate 4.50% [14],[18],[19],[22] 4.50% [5],[12],[16],[23]
Interest rate, cash 8.20% [14],[18],[19],[22] 8.20% [5],[12],[16],[23]
Investment, Identifier [Axis]: Syniverse Holdings, Inc. | Series A Preferred Equity    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [12] $ 11,439  
Fair value at ending balance $ 10,303 [14] $ 11,439 [12]
Investment, interest rate, paid in kind 12.50% [14] 12.50% [12]
Investment owned, balance (in shares) 7,575,758 [14] 7,575,758 [12]
Investment, Identifier [Axis]: Syntax Midco 2 Inc. | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[12],[16],[23] $ 2,599  
Fair value at ending balance $ 2,602 [14],[18],[19],[22] $ 2,599 [5],[12],[16],[23]
Basis spread on variable rate 4.50% [14],[18],[19],[22] 4.75% [5],[12],[16],[23]
Interest rate, cash 8.10% [14],[18],[19],[22] 8.50% [5],[12],[16],[23]
Investment, Identifier [Axis]: Syntax Midco 2 Inc. | Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[12],[16],[23] $ 797  
Fair value at ending balance $ 493 [14],[18],[19],[22] $ 797 [5],[12],[16],[23]
Basis spread on variable rate 4.50% [14],[18],[19],[22] 4.75% [5],[12],[16],[23]
Interest rate, cash 8.10% [14],[18],[19],[22] 8.50% [5],[12],[16],[23]
Investment, Identifier [Axis]: TA KHP Aggregator, L.P. | Common Stock    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [10],[12] $ 56  
Fair value at ending balance $ 78 [8],[14] $ 56 [10],[12]
Investment owned, balance (in shares) 47,209.6 [8],[14] 47,209.6 [10],[12]
Investment, Identifier [Axis]: TA KHP Aggregator, L.P. | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[12],[15],[16] $ 1,012  
Fair value at ending balance $ 1,011 [14],[17],[18],[19] $ 1,012 [5],[12],[15],[16]
Basis spread on variable rate 4.25% [14],[17],[18],[19] 4.25% [5],[12],[15],[16]
Interest rate, cash 8.00% [14],[17],[18],[19] 7.90% [5],[12],[15],[16]
Investment, Identifier [Axis]: TA KHP Aggregator, L.P. | Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[12],[15],[16] $ (4)  
Fair value at ending balance $ (3) [14],[17],[18],[19] $ (4) [5],[12],[15],[16]
Basis spread on variable rate 4.25% [14],[17],[18],[19] 4.25% [5],[12],[15],[16]
Interest rate, cash 8.00% [14],[17],[18],[19] 7.90% [5],[12],[15],[16]
Investment, Identifier [Axis]: TA KHP Aggregator, L.P. | Subordinated Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [12] $ 2,226  
Fair value at ending balance $ 2,518 [14] $ 2,226 [12]
Investment, interest rate, paid in kind [14] 12.30%  
Interest rate, cash [12]   12.50%
Investment, Identifier [Axis]: TA SL Cayman Aggregator Corp. | Common Stock    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [10],[12] $ 93  
Fair value at ending balance $ 78 [8],[14] $ 93 [10],[12]
Investment owned, balance (in shares) 1,589 [8],[14] 1,589 [10],[12]
Investment, Identifier [Axis]: TA SL Cayman Aggregator Corp. | Subordinated Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [12],[33] $ 3,148  
Fair value at ending balance $ 3,339 [14],[18],[29] $ 3,148 [12],[33]
Basis spread on variable rate 7.75% [14],[18],[29] 7.75% [12],[33]
Investment, interest rate, paid in kind 11.40% [14],[18],[29] 11.90% [12],[33]
Investment, Identifier [Axis]: TAPCO Buyer LLC | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [12],[16],[23] $ 9,492  
Fair value at ending balance $ 9,485 [14],[18],[22] $ 9,492 [12],[16],[23]
Basis spread on variable rate 5.00% [14],[18],[22] 4.50% [12],[16],[23]
Interest rate, cash 8.70% [14],[18],[22] 8.20% [12],[16],[23]
Investment, Identifier [Axis]: TAPCO Buyer LLC | LLC Units    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [10],[12] $ 523  
Fair value at ending balance $ 438 [14] $ 523 [10],[12]
Investment owned, balance (in shares) 339 [14] 339 [10],[12]
Investment, Identifier [Axis]: TAPCO Buyer LLC | Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[12],[16],[23] $ (16)  
Fair value at ending balance $ 198 [14],[18],[19],[22] $ (16) [5],[12],[16],[23]
Basis spread on variable rate 5.00% [14],[18],[19],[22] 4.50% [5],[12],[16],[23]
Interest rate, cash 8.70% [14],[18],[19],[22] 8.20% [5],[12],[16],[23]
Investment, Identifier [Axis]: THG Acquisition, LLC | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[12],[16],[23] $ 5,401  
Fair value at ending balance $ 6,419 [14],[18],[19],[22] $ 5,401 [5],[12],[16],[23]
Basis spread on variable rate 4.75% [14],[18],[19],[22] 4.75% [5],[12],[16],[23]
Interest rate, cash 8.40% [14],[18],[19],[22] 8.50% [5],[12],[16],[23]
Investment, Identifier [Axis]: THG Acquisition, LLC | Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[12],[16],[23] $ 190  
Fair value at ending balance $ 365 [14],[18],[19],[22] $ 190 [5],[12],[16],[23]
Basis spread on variable rate 4.75% [14],[18],[19],[22] 4.75% [5],[12],[16],[23]
Interest rate, cash 8.40% [14],[18],[19],[22] 8.50% [5],[12],[16],[23]
Investment, Identifier [Axis]: TSYL Corporate Buyer, Inc. | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[12],[15],[16] $ 16,833  
Fair value at ending balance $ 20,112 [14],[17],[18],[19] $ 16,833 [5],[12],[15],[16]
Basis spread on variable rate 4.50% [14],[17],[18],[19] 4.50% [5],[12],[15],[16]
Interest rate, cash 8.20% [14],[17],[18],[19] 8.30% [5],[12],[15],[16]
Investment, Identifier [Axis]: TSYL Corporate Buyer, Inc. | Partnership Units    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [10],[12] $ 36  
Fair value at ending balance $ 40 [8],[14] $ 36 [10],[12]
Investment owned, balance (in shares) 4,673 [8],[14] 4,673 [10],[12]
Investment, Identifier [Axis]: TSYL Corporate Buyer, Inc. | Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[12],[15],[16] $ 0  
Fair value at ending balance $ (1) [14],[17],[18],[19] $ 0 [5],[12],[15],[16]
Basis spread on variable rate 4.50% [14],[17],[18],[19] 4.50% [5],[12],[15],[16]
Interest rate, cash 8.20% [14],[17],[18],[19] 8.30% [5],[12],[15],[16]
Investment, Identifier [Axis]: Tallman Equipment Co., Inc. | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [14],[17],[18],[19] $ 6,360  
Basis spread on variable rate [14],[17],[18],[19] 4.50%  
Interest rate, cash [14],[17],[18],[19] 8.20%  
Investment, Identifier [Axis]: Tallman Equipment Co., Inc. | Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [14],[17],[18],[19] $ (15)  
Basis spread on variable rate [14],[17],[18],[19] 4.50%  
Interest rate, cash [14],[17],[18],[19] 8.20%  
Investment, Identifier [Axis]: Tank Holding Corp | First Lien Senior Secured Term Loan 1    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [12],[16],[23] $ 7,743  
Fair value at ending balance $ 7,337 [14],[18],[22] $ 7,743 [12],[16],[23]
Basis spread on variable rate 5.75% [14],[18],[22] 5.75% [12],[16],[23]
Interest rate, cash 9.50% [14],[18],[22] 9.60% [12],[16],[23]
Investment, Identifier [Axis]: Tank Holding Corp | First Lien Senior Secured Term Loan 2    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [12],[16],[23] $ 2,985  
Fair value at ending balance $ 2,835 [14],[18],[22] $ 2,985 [12],[16],[23]
Basis spread on variable rate 6.00% [14],[18],[22] 6.00% [12],[16],[23]
Interest rate, cash 9.70% [14],[18],[22] 9.80% [12],[16],[23]
Investment, Identifier [Axis]: Tank Holding Corp | Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[12],[16],[23] $ (9)  
Fair value at ending balance $ 52 [14],[18],[19],[22] $ (9) [5],[12],[16],[23]
Basis spread on variable rate 5.75% [14],[18],[19],[22] 5.75% [5],[12],[16],[23]
Interest rate, cash 9.50% [14],[18],[19],[22] 9.60% [5],[12],[16],[23]
Investment, Identifier [Axis]: Tanqueray Bidco Limited | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[7],[12],[16],[30] $ 1,779  
Fair value at ending balance $ 1,780 [3],[14],[18],[26] $ 1,779 [5],[7],[12],[16],[30]
Basis spread on variable rate 5.00% [3],[14],[18],[26] 5.25% [5],[7],[12],[16],[30]
Interest rate, cash 8.70% [3],[14],[18],[26] 9.20% [5],[7],[12],[16],[30]
Investment, Identifier [Axis]: Team Air Distributing, LLC | Partnership Equity    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [10],[12] $ 212  
Fair value at ending balance $ 0 [8],[14] $ 212 [10],[12]
Investment owned, balance (in shares) 526,326.5 [8],[14] 516,640.2 [10],[12]
Investment, Identifier [Axis]: Team Air Distributing, LLC | Preferred Stock 1    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [8],[14] $ 48  
Investment owned, balance (in shares) [8],[14] 48,431.3  
Investment, Identifier [Axis]: Team Air Distributing, LLC | Preferred Stock 2    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [8],[14] $ 0  
Investment owned, balance (in shares) [8],[14] 88,888.9  
Investment, Identifier [Axis]: Team Air Distributing, LLC | Subordinated Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [12] $ 717  
Fair value at ending balance $ 737 [14],[25] $ 717 [12]
Investment, interest rate, paid in kind [14],[25] 14.00%  
Interest rate, cash [12]   14.00%
Investment, Identifier [Axis]: Technology Service Stream BidCo Pty Ltd | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[7],[12],[16],[34] $ 821  
Fair value at ending balance $ 993 [3],[14],[18],[19],[35] $ 821 [5],[7],[12],[16],[34]
Basis spread on variable rate 5.00% [3],[14],[18],[19],[35] 5.00% [5],[7],[12],[16],[34]
Interest rate, cash 9.50% [3],[14],[18],[19],[35] 8.80% [5],[7],[12],[16],[34]
Investment, Identifier [Axis]: Techone B.V. | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[12],[16],[20] $ 4,114  
Fair value at ending balance [7],[12],[16],[20]   $ 4,114
Basis spread on variable rate [7],[12],[16],[20]   5.40%
Interest rate, cash [7],[12],[16],[20]   7.40%
Investment, Identifier [Axis]: Techone B.V. | Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[7],[12],[16],[20] (2)  
Fair value at ending balance [5],[7],[12],[16],[20]   $ (2)
Basis spread on variable rate [5],[7],[12],[16],[20]   5.40%
Interest rate, cash [5],[7],[12],[16],[20]   7.40%
Investment, Identifier [Axis]: Tencarva Machinery Company, LLC | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[12],[15],[16] 7,507  
Fair value at ending balance $ 9,139 [14],[17],[18],[19] $ 7,507 [5],[12],[15],[16]
Basis spread on variable rate 4.75% [14],[17],[18],[19] 4.75% [5],[12],[15],[16]
Interest rate, cash 8.60% [14],[17],[18],[19] 8.60% [5],[12],[15],[16]
Investment, Identifier [Axis]: Tencarva Machinery Company, LLC | Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[12],[15],[16] $ (17)  
Fair value at ending balance $ (16) [14],[17],[18],[19] $ (17) [5],[12],[15],[16]
Basis spread on variable rate 4.75% [14],[17],[18],[19] 4.75% [5],[12],[15],[16]
Interest rate, cash 8.60% [14],[17],[18],[19] 8.60% [5],[12],[15],[16]
Investment, Identifier [Axis]: Terrybear, Inc. | Partnership Equity    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [10],[12] $ 0  
Fair value at ending balance $ 0 [8],[14] $ 0 [10],[12]
Investment owned, balance (in shares) 24,358.97 [8],[14] 24,358.97 [10],[12]
Investment, Identifier [Axis]: Terrybear, Inc. | Subordinated Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [12] $ 269  
Fair value at ending balance $ 166 [14],[25] $ 269 [12]
Investment, interest rate, paid in kind 14.00% [14],[25] 4.00% [12]
Interest rate, cash [12]   10.00%
Investment, Identifier [Axis]: The Caprock Group, Inc. (aka TA/TCG Holdings, LLC) | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[12],[16],[23] $ 7,768  
Fair value at ending balance $ 8,130 [14],[18],[19],[22] $ 7,768 [5],[12],[16],[23]
Basis spread on variable rate 4.50% [14],[18],[19],[22] 4.75% [5],[12],[16],[23]
Interest rate, cash 8.10% [14],[18],[19],[22] 8.50% [5],[12],[16],[23]
Investment, Identifier [Axis]: The Caprock Group, Inc. (aka TA/TCG Holdings, LLC) | Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[12],[16],[23] $ (18)  
Fair value at ending balance $ (14) [14],[18],[19],[22] $ (18) [5],[12],[16],[23]
Basis spread on variable rate 4.50% [14],[18],[19],[22] 4.75% [5],[12],[16],[23]
Interest rate, cash 8.10% [14],[18],[19],[22] 8.50% [5],[12],[16],[23]
Investment, Identifier [Axis]: The Octave Music Group, Inc. | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [15],[16] $ 58  
Fair value at ending balance $ 53 [17],[18] $ 58 [15],[16]
Basis spread on variable rate 4.75% [17],[18] 4.75% [15],[16]
Interest rate, cash 8.50% [17],[18] 8.40% [15],[16]
Investment, Identifier [Axis]: The Octave Music Group, Inc. | Partnership Equity    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [10],[12] $ 1,956  
Fair value at ending balance $ 1,597 [8],[14] $ 1,956 [10],[12]
Investment owned, balance (in shares) 676,881 [8],[14] 676,881 [10],[12]
Investment, Identifier [Axis]: Thompson Rivers LLC | 16.0% Member Interest    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [4],[6],[10] $ 4,271  
Gross Additions [40] 0  
Gross Reductions [41] (1,598)  
Amount of Realized Gain (Loss) 0  
Amount of Unrealized Gain (Loss) 37  
Fair value at ending balance 2,710 [1],[2],[8] $ 4,271 [4],[6],[10]
Amount of Interest or Dividends Credited to Income [42] 0  
Investment, Identifier [Axis]: Thompson Rivers LLC | Member Interest    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance 4,271 7,208
Gross Additions [44]   0
Gross Reductions [45]   (2,876)
Amount of Realized Gain (Loss)   0
Amount of Unrealized Gain (Loss)   (61)
Fair value at ending balance   4,271
Amount of Interest or Dividends Credited to Income [46]   0
Investment, Identifier [Axis]: Transportation Insight, LLC | Class A Common Units    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [8],[14] $ 0  
Investment owned, balance (in shares) [8],[14] 14.51  
Investment, Identifier [Axis]: Transportation Insight, LLC | Class A Preferred Units    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [8],[14] $ 3,688  
Investment owned, balance (in shares) [8],[14] 20.04  
Investment, Identifier [Axis]: Transportation Insight, LLC | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [14],[17],[18] $ 4,105  
Basis spread on variable rate [14],[17],[18] 7.00%  
Investment, interest rate, paid in kind [14],[17],[18] 7.00%  
Interest rate, cash [14],[17],[18] 10.70%  
Investment, Identifier [Axis]: Transportation Insight, LLC | First Lien Senior Secured Term Loan 1    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [12],[16],[23] $ 6,876  
Fair value at ending balance [12],[16],[23]   $ 6,876
Basis spread on variable rate [12],[16],[23]   4.50%
Investment, interest rate, paid in kind [12],[16],[23]   1.00%
Interest rate, cash [12],[16],[23]   8.30%
Investment, Identifier [Axis]: Transportation Insight, LLC | First Lien Senior Secured Term Loan 2    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [12],[16],[23] 26  
Fair value at ending balance [12],[16],[23]   $ 26
Basis spread on variable rate [12],[16],[23]   4.50%
Investment, interest rate, paid in kind [12],[16],[23]   1.00%
Interest rate, cash [12],[16],[23]   8.30%
Investment, Identifier [Axis]: Transportation Insight, LLC | Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[12],[16],[23] 0  
Fair value at ending balance $ 641 [14],[17],[18],[19] $ 0 [5],[12],[16],[23]
Basis spread on variable rate 5.50% [14],[17],[18],[19] 4.50% [5],[12],[16],[23]
Investment, interest rate, paid in kind [5],[12],[16],[23]   1.00%
Interest rate, cash 9.20% [14],[17],[18],[19] 8.30% [5],[12],[16],[23]
Investment, Identifier [Axis]: Trident Maritime Systems, Inc. | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [12],[15],[16] $ 12,583  
Fair value at ending balance $ 10,519 [14],[17],[18] $ 12,583 [12],[15],[16]
Basis spread on variable rate 5.50% [14],[17],[18] 1.00% [12],[15],[16]
Investment, interest rate, paid in kind 2.00% [14],[17],[18] 6.80% [12],[15],[16]
Interest rate, cash 9.30% [14],[17],[18] 4.80% [12],[15],[16]
Investment, Identifier [Axis]: Trintech, Inc. | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [12],[16],[23] $ 6,798  
Fair value at ending balance [12],[16],[23]   $ 6,798
Basis spread on variable rate [12],[16],[23]   5.50%
Interest rate, cash [12],[16],[23]   9.20%
Investment, Identifier [Axis]: Trintech, Inc. | Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[12],[16],[23] 151  
Fair value at ending balance [5],[12],[16],[23]   $ 151
Basis spread on variable rate [5],[12],[16],[23]   5.50%
Interest rate, cash [5],[12],[16],[23]   9.20%
Investment, Identifier [Axis]: Turbo Buyer, Inc. | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [12],[15],[16] 8,008  
Fair value at ending balance [12],[15],[16]   $ 8,008
Basis spread on variable rate [12],[15],[16]   6.00%
Interest rate, cash [12],[15],[16]   9.80%
Investment, Identifier [Axis]: Turnberry Solutions, Inc. | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [12],[16],[23] 4,824  
Fair value at ending balance $ 4,717 [14],[18],[22] $ 4,824 [12],[16],[23]
Basis spread on variable rate 6.00% [14],[18],[22] 5.75% [12],[16],[23]
Interest rate, cash 9.80% [14],[18],[22] 9.60% [12],[16],[23]
Investment, Identifier [Axis]: UBC Ledgers Holding AB | First Lien Senior Secured Term Loan 1    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[12],[16],[20] $ 769  
Fair value at ending balance $ 749 [3],[14],[18],[21] $ 769 [7],[12],[16],[20]
Basis spread on variable rate 5.25% [3],[14],[18],[21] 5.25% [7],[12],[16],[20]
Interest rate, cash 7.50% [3],[14],[18],[21] 7.30% [7],[12],[16],[20]
Investment, Identifier [Axis]: UBC Ledgers Holding AB | First Lien Senior Secured Term Loan 2    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[7],[12],[16],[70] $ 1,738  
Fair value at ending balance $ 1,656 [3],[14],[18],[19],[71] $ 1,738 [5],[7],[12],[16],[70]
Basis spread on variable rate 5.25% [3],[14],[18],[19],[71] 5.25% [5],[7],[12],[16],[70]
Interest rate, cash 7.30% [3],[14],[18],[19],[71] 7.10% [5],[7],[12],[16],[70]
Investment, Identifier [Axis]: UHY Advisors, Inc. | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[12],[15],[16] $ 8,295  
Fair value at ending balance $ 13,297 [14],[17],[18],[19] $ 8,295 [5],[12],[15],[16]
Basis spread on variable rate 4.75% [14],[17],[18],[19] 4.75% [5],[12],[15],[16]
Interest rate, cash 8.40% [14],[17],[18],[19] 8.60% [5],[12],[15],[16]
Investment, Identifier [Axis]: UHY Advisors, Inc. | Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[12],[15],[16] $ 1,013  
Fair value at ending balance $ 740 [14],[17],[18],[19] $ 1,013 [5],[12],[15],[16]
Basis spread on variable rate 4.75% [14],[17],[18],[19] 4.75% [5],[12],[15],[16]
Interest rate, cash 8.40% [14],[17],[18],[19] 8.60% [5],[12],[15],[16]
Investment, Identifier [Axis]: UKFast Leaders Limited | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[12],[16],[30] $ 12,323  
Fair value at ending balance $ 11,949 [3],[14],[18],[26] $ 12,323 [7],[12],[16],[30]
Basis spread on variable rate 7.25% [3],[14],[18],[26] 7.25% [7],[12],[16],[30]
Interest rate, cash 11.30% [3],[14],[18],[26] 11.10% [7],[12],[16],[30]
Investment, Identifier [Axis]: UNA 658 Equity Management GmbH | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [3],[14],[18],[19],[21] $ 1,281  
Basis spread on variable rate [3],[14],[18],[19],[21] 5.25%  
Interest rate, cash [3],[14],[18],[19],[21] 7.60%  
Investment, Identifier [Axis]: US Bank National Association Series 2025-1 | Structured Note - Class R    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[12],[15],[16] $ 4,965  
Fair value at ending balance $ 3,428 [3],[14],[17],[18] $ 4,965 [7],[12],[15],[16]
Basis spread on variable rate 7.50% [3],[14],[17],[18] 7.50% [7],[12],[15],[16]
Interest rate, cash 11.40% [3],[14],[17],[18] 11.40% [7],[12],[15],[16]
Investment, Identifier [Axis]: US Bank National Association Series 2025-2 | Structured Note - Class R    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[16],[23] $ 4,594  
Fair value at ending balance $ 3,462 [3],[18],[22] $ 4,594 [7],[16],[23]
Basis spread on variable rate 7.00% [3],[18],[22] 7.00% [7],[16],[23]
Interest rate, cash 10.90% [3],[18],[22] 10.90% [7],[16],[23]
Investment, Identifier [Axis]: USLS Acquisition, Inc. (f/k/a US Legal Support, Inc.) | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [12],[16],[23] $ 17,906  
Fair value at ending balance $ 17,745 [14],[18],[22] $ 17,906 [12],[16],[23]
Basis spread on variable rate 5.25% [14],[18],[22] 5.50% [12],[16],[23]
Interest rate, cash 9.10% [14],[18],[22] 9.30% [12],[16],[23]
Investment, Identifier [Axis]: Union Bidco Limited | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[12],[16],[31] $ 1,049  
Fair value at ending balance $ 1,053 [3],[14],[18],[32] $ 1,049 [7],[12],[16],[31]
Basis spread on variable rate 4.30% [3],[14],[18],[32] 4.30% [7],[12],[16],[31]
Interest rate, cash 8.00% [3],[14],[18],[32] 8.50% [7],[12],[16],[31]
Investment, Identifier [Axis]: Unither (Uniholding) | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[7],[12],[16],[20] $ 471  
Fair value at ending balance $ 648 [3],[14],[18],[19],[21] $ 471 [5],[7],[12],[16],[20]
Basis spread on variable rate 4.95% [3],[14],[18],[19],[21] 4.70% [5],[7],[12],[16],[20]
Interest rate, cash 7.20% [3],[14],[18],[19],[21] 6.70% [5],[7],[12],[16],[20]
Investment, Identifier [Axis]: Unosquare, LLC | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[12],[16],[23] $ 2,362  
Fair value at ending balance $ 2,175 [14],[18],[19],[22] $ 2,362 [5],[12],[16],[23]
Basis spread on variable rate 4.75% [14],[18],[19],[22] 4.75% [5],[12],[16],[23]
Interest rate, cash 8.40% [14],[18],[19],[22] 8.50% [5],[12],[16],[23]
Investment, Identifier [Axis]: Unosquare, LLC | LLC Units    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [10],[12] $ 216  
Fair value at ending balance $ 143 [8],[14] $ 216 [10],[12]
Investment owned, balance (in shares) 260,817.7 [8],[14] 260,817.7 [10],[12]
Investment, Identifier [Axis]: Unosquare, LLC | Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[12],[16],[23] $ (8)  
Fair value at ending balance $ (34) [14],[18],[19],[22] $ (8) [5],[12],[16],[23]
Basis spread on variable rate 4.75% [14],[18],[19],[22] 4.75% [5],[12],[16],[23]
Interest rate, cash 8.40% [14],[18],[19],[22] 8.50% [5],[12],[16],[23]
Investment, Identifier [Axis]: Utac Ceram | First Lien Senior Secured Term Loan 1    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[12],[16],[20] $ 1,837  
Fair value at ending balance $ 1,788 [3],[14],[18],[21] $ 1,837 [7],[12],[16],[20]
Basis spread on variable rate 5.90% [3],[14],[18],[21] 6.00% [7],[12],[16],[20]
Investment, interest rate, paid in kind [7],[12],[16],[20]   2.40%
Interest rate, cash 8.20% [3],[14],[18],[21] 7.90% [7],[12],[16],[20]
Investment, Identifier [Axis]: Utac Ceram | First Lien Senior Secured Term Loan 2    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[12],[15],[16] $ 3,668  
Fair value at ending balance $ 3,668 [3],[14],[17],[18] $ 3,668 [7],[12],[15],[16]
Basis spread on variable rate 5.90% [3],[14],[17],[18] 4.00% [7],[12],[15],[16]
Investment, interest rate, paid in kind [7],[12],[15],[16]   2.40%
Interest rate, cash 9.60% [3],[14],[17],[18] 7.70% [7],[12],[15],[16]
Investment, Identifier [Axis]: VB Spine Intermediary II LLC | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [12],[15],[16] $ 44,443  
Fair value at ending balance $ 45,393 [14],[17],[18] $ 44,443 [12],[15],[16]
Basis spread on variable rate 5.00% [14],[17],[18] 5.00% [12],[15],[16]
Investment, interest rate, paid in kind 4.40% [14],[17],[18] 4.40% [12],[15],[16]
Interest rate, cash 8.70% [14],[17],[18] 8.70% [12],[15],[16]
Investment, Identifier [Axis]: VB Spine Intermediary II LLC | LLC Units    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [10],[12] $ 0  
Fair value at ending balance $ 0 [8],[14] $ 0 [10],[12]
Investment owned, balance (in shares) 767,670.7 [8],[14] 767,670.7 [10],[12]
Investment, Identifier [Axis]: VOYA CLO 2015-2, LTD. | Subordinated Structured Notes    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[9],[10] $ 41  
Fair value at ending balance [7],[9],[10]   $ 41
Investment, Identifier [Axis]: VOYA CLO 2016-2, LTD. | Subordinated Structured Notes    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[9],[10] 1  
Fair value at ending balance [7],[9],[10]   1
Investment, Identifier [Axis]: Velocity Pooling Vehicle, LLC | Common Stock    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [9],[10],[12] 2  
Fair value at ending balance $ 2 [8],[14] $ 2 [9],[10],[12]
Investment owned, balance (in shares) 4,676 [8],[14] 4,676 [9],[10],[12]
Investment, Identifier [Axis]: Velocity Pooling Vehicle, LLC | Warrants    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [9],[10],[12] $ 3  
Fair value at ending balance $ 3 [8],[14] $ 3 [9],[10],[12]
Investment owned, balance (in shares) 5,591 [8],[14] 5,591 [9],[10],[12]
Investment, Identifier [Axis]: Victoria Bidco Limited | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[12],[16],[31] $ 4,013  
Fair value at ending balance $ 3,960 [3],[14],[18],[32] $ 4,013 [7],[12],[16],[31]
Basis spread on variable rate 6.50% [3],[14],[18],[32] 6.50% [7],[12],[16],[31]
Interest rate, cash 10.20% [3],[14],[18],[32] 10.70% [7],[12],[16],[31]
Investment, Identifier [Axis]: Vista Acquisition, LLC | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [14],[18],[19],[22] $ 8,669  
Basis spread on variable rate [14],[18],[19],[22] 5.00%  
Interest rate, cash [14],[18],[19],[22] 8.60%  
Investment, Identifier [Axis]: Vista Acquisition, LLC | Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at ending balance [14],[18],[19],[22] $ (9)  
Basis spread on variable rate [14],[18],[19],[22] 5.00%  
Interest rate, cash [14],[18],[19],[22] 8.60%  
Investment, Identifier [Axis]: Vista Global Holding Ltd | Structured Secured Note - Class C    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7] $ 482  
Fair value at ending balance $ 469 [3] $ 482 [7]
Interest rate, cash 9.50% [3] 9.50% [7]
Investment, Identifier [Axis]: Vital Buyer, LLC | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [12],[15],[16] $ 13,232  
Fair value at ending balance $ 13,124 [14],[17],[18] $ 13,232 [12],[15],[16]
Basis spread on variable rate 4.50% [14],[17],[18] 4.50% [12],[15],[16]
Interest rate, cash 8.20% [14],[17],[18] 8.30% [12],[15],[16]
Investment, Identifier [Axis]: Vital Buyer, LLC | Partnership Units    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [12] $ 566  
Fair value at ending balance $ 594 [8],[14] $ 566 [12]
Investment owned, balance (in shares) 16,442.9 [8],[14] 16,442.9 [12]
Investment, Identifier [Axis]: WEST-NR ACQUISITIONCO, LLC | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[12],[15],[16] $ 10,900  
Fair value at ending balance $ 13,193 [14],[17],[18],[19] $ 10,900 [5],[12],[15],[16]
Basis spread on variable rate 5.00% [14],[17],[18],[19] 5.00% [5],[12],[15],[16]
Interest rate, cash 8.80% [14],[17],[18],[19] 8.80% [5],[12],[15],[16]
Investment, Identifier [Axis]: WWEC Holdings III Corp | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [12],[15],[16] $ 12,049  
Fair value at ending balance $ 11,986 [14],[17],[18] $ 12,049 [12],[15],[16]
Basis spread on variable rate 5.25% [14],[17],[18] 5.00% [12],[15],[16]
Interest rate, cash 9.00% [14],[17],[18] 8.70% [12],[15],[16]
Investment, Identifier [Axis]: WWEC Holdings III Corp | Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[12],[15],[16] $ (15)  
Fair value at ending balance $ (10) [14],[17],[18],[19] $ (15) [5],[12],[15],[16]
Basis spread on variable rate 5.25% [14],[17],[18],[19] 5.00% [5],[12],[15],[16]
Interest rate, cash 9.00% [14],[17],[18],[19] 8.70% [5],[12],[15],[16]
Investment, Identifier [Axis]: Waccamaw River LLC | 20% Member Interest    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [4],[6],[7] $ 4,489  
Gross Additions [40] 0  
Gross Reductions [41] (4,406)  
Amount of Realized Gain (Loss) 0  
Amount of Unrealized Gain (Loss) (7)  
Fair value at ending balance 76 [1],[2],[3],[8] $ 4,489 [4],[6],[7]
Amount of Interest or Dividends Credited to Income [42] 161  
Investment, Identifier [Axis]: Waccamaw River LLC | Member Interest    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance 4,489 10,730
Gross Additions [44]   0
Gross Reductions [45]   (5,843)
Amount of Realized Gain (Loss)   0
Amount of Unrealized Gain (Loss)   (398)
Fair value at ending balance   4,489
Amount of Interest or Dividends Credited to Income [46]   907
Investment, Identifier [Axis]: Whitcraft Holdings, Inc. | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[12],[15],[16] 12,845  
Fair value at ending balance $ 13,018 [14],[17],[18] $ 12,845 [5],[12],[15],[16]
Basis spread on variable rate 5.00% [14],[17],[18] 5.00% [5],[12],[15],[16]
Interest rate, cash 8.70% [14],[17],[18] 8.70% [5],[12],[15],[16]
Investment, Identifier [Axis]: Whitcraft Holdings, Inc. | LP Units    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [10],[12] $ 1,164  
Fair value at ending balance $ 1,527 [8],[14] $ 1,164 [10],[12]
Investment owned, balance (in shares) 63,087.1 [8],[14] 63,087.1 [10],[12]
Investment, Identifier [Axis]: Whitcraft Holdings, Inc. | Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[12],[15],[16] $ (17)  
Fair value at ending balance $ 709 [14],[17],[18],[19] $ (17) [5],[12],[15],[16]
Basis spread on variable rate 5.00% [14],[17],[18],[19] 5.00% [5],[12],[15],[16]
Interest rate, cash 8.70% [14],[17],[18],[19] 8.70% [5],[12],[15],[16]
Investment, Identifier [Axis]: White Bidco Limited | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[12],[15],[16] $ 2,247  
Fair value at ending balance $ 2,257 [3],[14],[17],[18] $ 2,247 [7],[12],[15],[16]
Basis spread on variable rate 4.50% [3],[14],[17],[18] 4.75% [7],[12],[15],[16]
Interest rate, cash 8.20% [3],[14],[17],[18] 8.60% [7],[12],[15],[16]
Investment, Identifier [Axis]: Woodland Foods, LLC | Common Stock    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [10],[12] $ 1,815  
Fair value at ending balance $ 1,962 [8],[14] $ 1,815 [10],[12]
Investment owned, balance (in shares) 1,663.3 [8],[14] 1,663.3 [10],[12]
Investment, Identifier [Axis]: Woodland Foods, LLC | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [12],[16] $ 17,036  
Fair value at ending balance $ 17,032 [14],[17],[18] $ 17,036 [12],[16]
Basis spread on variable rate 5.25% [14],[17],[18] 5.25% [12],[16]
Interest rate, cash 9.10% [14],[17],[18] 9.20% [12],[16]
Investment, Identifier [Axis]: Woodland Foods, LLC | Preferred Stock 1    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [12] $ 551  
Fair value at ending balance $ 664 [14] $ 551 [12]
Investment, interest rate, paid in kind 20.00% [14] 20.00% [12]
Investment owned, balance (in shares) 364.00 [14] 364.00 [12]
Investment, Identifier [Axis]: Woodland Foods, LLC | Preferred Stock 2    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [12] $ 145  
Fair value at ending balance $ 158 [14] $ 145 [12]
Investment, interest rate, paid in kind 20.00% [14] 20.00% [12]
Investment owned, balance (in shares) 94.60 [14] 94.60 [12]
Investment, Identifier [Axis]: Woodland Foods, LLC | Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[12],[15],[16] $ (28)  
Fair value at ending balance $ 1,375 [14],[17],[18],[19] $ (28) [5],[12],[15],[16]
Basis spread on variable rate 5.25% [14],[17],[18],[19] 5.25% [5],[12],[15],[16]
Interest rate, cash 9.10% [14],[17],[18],[19] 9.20% [5],[12],[15],[16]
Investment, Identifier [Axis]: World 50, Inc. | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [12],[16],[33] $ 13,757  
Fair value at ending balance $ 13,637 [14],[18],[29] $ 13,757 [12],[16],[33]
Basis spread on variable rate 4.50% [14],[18],[29] 4.50% [12],[16],[33]
Interest rate, cash 8.20% [14],[18],[29] 8.70% [12],[16],[33]
Investment, Identifier [Axis]: World 50, Inc. | Revolver    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[12],[16],[33] $ 0  
Fair value at ending balance $ 0 [14],[18],[19],[29] $ 0 [5],[12],[16],[33]
Basis spread on variable rate 4.50% [14],[18],[19],[29] 4.50% [5],[12],[16],[33]
Interest rate, cash 8.20% [14],[18],[19],[29] 8.70% [5],[12],[16],[33]
Investment, Identifier [Axis]: Xeinadin Bidco Limited | Common Stock    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[10],[12] $ 1,228  
Fair value at ending balance $ 1,212 [3],[8],[14] $ 1,228 [7],[10],[12]
Investment owned, balance (in shares) 45,665,825 [3],[8],[14] 45,665,825 [7],[10],[12]
Investment, Identifier [Axis]: Xeinadin Bidco Limited | First Lien Senior Secured Term Loan 1    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[12],[16],[27] $ 329  
Fair value at ending balance $ 320 [3],[14],[18],[28] $ 329 [7],[12],[16],[27]
Basis spread on variable rate 6.25% [3],[14],[18],[28] 5.50% [7],[12],[16],[27]
Interest rate, cash 8.80% [3],[14],[18],[28] 7.60% [7],[12],[16],[27]
Investment, Identifier [Axis]: Xeinadin Bidco Limited | First Lien Senior Secured Term Loan 2    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[12],[16],[31] $ 9,465  
Fair value at ending balance $ 9,340 [3],[14],[18],[32] $ 9,465 [7],[12],[16],[31]
Basis spread on variable rate 6.25% [3],[14],[18],[32] 5.50% [7],[12],[16],[31]
Interest rate, cash 10.00% [3],[14],[18],[32] 9.50% [7],[12],[16],[31]
Investment, Identifier [Axis]: Xeinadin Bidco Limited | Subordinated Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [7],[12],[31] $ 4,431  
Fair value at ending balance $ 4,727 [3],[14],[18],[32] $ 4,431 [7],[12],[31]
Basis spread on variable rate 11.00% [3],[14],[18],[32] 11.00% [7],[12],[31]
Investment, interest rate, paid in kind 14.70% [3],[14],[18] 15.00% [7],[12],[31]
Investment, Identifier [Axis]: Zelda Luxco S.A.S | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [5],[7],[12],[16],[27] $ 1,707  
Fair value at ending balance $ 1,671 [3],[14],[18],[19],[28] $ 1,707 [5],[7],[12],[16],[27]
Basis spread on variable rate 5.25% [3],[14],[18],[19],[28] 5.25% [5],[7],[12],[16],[27]
Interest rate, cash 7.40% [3],[14],[18],[19],[28] 7.20% [5],[7],[12],[16],[27]
Investment, Identifier [Axis]: Zeppelin Bidco Limited | First Lien Senior Secured Term Loan    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance $ 2,565 [6],[7],[12],[16],[31] $ 0
Gross Additions 140 [40] 2,826 [44]
Gross Reductions 0 [41] (13) [45]
Amount of Realized Gain (Loss) 0 (4,835)
Amount of Unrealized Gain (Loss) (42) 4,587
Fair value at ending balance 2,663 [2],[3],[14],[18],[32] 2,565 [6],[7],[12],[16],[31]
Amount of Interest or Dividends Credited to Income $ 139 [42] $ 111 [46]
Basis spread on variable rate 6.50% [2],[3],[14],[18],[32] 6.50% [6],[7],[12],[16],[31]
Interest rate, cash 10.20% [2],[3],[14],[18],[32] 10.50% [6],[7],[12],[16],[31]
Investment, Identifier [Axis]: Zeppelin Bidco Limited | Ordinary Shares    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [6],[7],[10],[12] $ 82  
Gross Additions [40] 0  
Gross Reductions [41] 0  
Amount of Realized Gain (Loss) 0  
Amount of Unrealized Gain (Loss) (82)  
Fair value at ending balance 0 [2],[3],[8],[14] $ 82 [6],[7],[10],[12]
Amount of Interest or Dividends Credited to Income [42] $ 0  
Investment owned, balance (in shares) 879 [2],[3],[8],[14] 879 [6],[7],[10],[12]
Investment, Identifier [Axis]: Zeppelin Bidco Limited | Ordinary Shares(879 shares)    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance $ 82 $ 0
Gross Additions [44]   0
Gross Reductions [45]   0
Amount of Realized Gain (Loss)   0
Amount of Unrealized Gain (Loss)   82
Fair value at ending balance   82
Amount of Interest or Dividends Credited to Income [46]   $ 0
Investment owned, balance (in shares)   879
Affiliate investments    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance 399,183 $ 397,236
Gross Additions 105,279 [40] 43,428 [44]
Gross Reductions (54,146) [41] (40,688) [45]
Amount of Realized Gain (Loss) 0 (4,791)
Amount of Unrealized Gain (Loss) (548) 3,998
Fair value at ending balance 449,768 399,183
Amount of Interest or Dividends Credited to Income 27,320 [42] 45,484 [46]
Affiliate investments | Biolam Group    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance 1,731 [72] 0 [73]
Gross Additions 0 [40],[72] 1,258 [44],[73]
Gross Reductions 0 [41],[72] (128) [45],[73]
Amount of Realized Gain (Loss) 0 [72] 44 [73]
Amount of Unrealized Gain (Loss) (419) [72] 557 [73]
Fair value at ending balance [72] 1,312 1,731
Amount of Interest or Dividends Credited to Income 0 [42],[72] (27) [46],[73]
Affiliate investments | Celebration Bidco, LLC    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance 17,388 [72] 17,676 [73]
Gross Additions 43 [40],[72] 2,266 [44],[73]
Gross Reductions 0 [41],[72] 0 [45],[73]
Amount of Realized Gain (Loss) 0 [72] 0 [73]
Amount of Unrealized Gain (Loss) 1,502 [72] (2,554) [73]
Fair value at ending balance [72] 18,933 17,388
Amount of Interest or Dividends Credited to Income 512 [42],[72] 987 [46],[73]
Affiliate investments | Coastal Marina Holdings, LLC    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [73] 43,201 39,893
Gross Additions 75 [40],[72] 141 [44],[73]
Gross Reductions 0 [41],[72] 0 [45],[73]
Amount of Realized Gain (Loss) 0 [72] 0 [73]
Amount of Unrealized Gain (Loss) 648 [72] 3,167 [73]
Fair value at ending balance 43,924 [72] 43,201 [73]
Amount of Interest or Dividends Credited to Income 1,038 [42],[72] 2,082 [46],[73]
Affiliate investments | Eclipse Business Capital, LLC    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [73] 153,994 151,491
Gross Additions 31,073 [40],[72] 8,680 [44],[73]
Gross Reductions (24,757) [41],[72] (8,820) [45],[73]
Amount of Realized Gain (Loss) 0 [72] 0 [73]
Amount of Unrealized Gain (Loss) (13) [72] 2,643 [73]
Fair value at ending balance 160,297 [72] 153,994 [73]
Amount of Interest or Dividends Credited to Income 8,777 [42],[72] 18,021 [46],[73]
Affiliate investments | EMI Porta Holdco LLC    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [72] 0  
Gross Additions [40],[72] 10,110  
Gross Reductions [41],[72] (127)  
Amount of Realized Gain (Loss) [72] 0  
Amount of Unrealized Gain (Loss) [72] (10)  
Fair value at ending balance [72] 9,973 0
Amount of Interest or Dividends Credited to Income [42],[72] 61  
Affiliate investments | Jocassee Partners LLC    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance 37,986 40,761
Gross Additions 0 [40] 0 [44]
Gross Reductions 0 [41] 0 [45]
Amount of Realized Gain (Loss) 0 0
Amount of Unrealized Gain (Loss) (4,806) (2,775)
Fair value at ending balance 33,180 37,986
Amount of Interest or Dividends Credited to Income 5,709 [42] 5,709 [46]
Affiliate investments | Policy Services Company, LLC    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [72] 0  
Gross Additions [40],[72] 50,122  
Gross Reductions [41],[72] 0  
Amount of Realized Gain (Loss) [72] 0  
Amount of Unrealized Gain (Loss) [72] (226)  
Fair value at ending balance [72] 49,896 0
Amount of Interest or Dividends Credited to Income [42],[72] 1,995  
Affiliate investments | Rocade Holdings LLC    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance 95,713 [72] 83,243 [73]
Gross Additions 13,552 [40],[72] 11,489 [44],[73]
Gross Reductions (4,681) [41],[72] (2,355) [45],[73]
Amount of Realized Gain (Loss) 0 [72] 0 [73]
Amount of Unrealized Gain (Loss) 1,074 [72] 3,336 [73]
Fair value at ending balance [72] 105,658 95,713
Amount of Interest or Dividends Credited to Income 5,835 [42],[72] 9,164 [46],[73]
Affiliate investments | Sierra Senior Loan Strategy JV I LLC    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance 16,404 41,453
Gross Additions 0 [40] 0 [44]
Gross Reductions (16,437) [41] (20,472) [45]
Amount of Realized Gain (Loss) 0 0
Amount of Unrealized Gain (Loss) 33 (4,577)
Fair value at ending balance 0 16,404
Amount of Interest or Dividends Credited to Income 223 [42] 7,121 [46]
Affiliate investments | Skyvault Holdings LLC    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [73] 21,359 4,781
Gross Additions 164 [40],[72] 16,768 [44],[73]
Gross Reductions (2,140) [41],[72] (181) [45],[73]
Amount of Realized Gain (Loss) 0 [72] 0 [73]
Amount of Unrealized Gain (Loss) 1,763 [72] (9) [73]
Fair value at ending balance 21,146 [72] 21,359 [73]
Amount of Interest or Dividends Credited to Income 2,870 [42],[72] 1,409 [46],[73]
Affiliate investments | Thompson Rivers LLC    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance 4,271 7,208
Gross Additions 0 [40] 0 [44]
Gross Reductions (1,598) [41] (2,876) [45]
Amount of Realized Gain (Loss) 0 0
Amount of Unrealized Gain (Loss) 37 (61)
Fair value at ending balance 2,710 4,271
Amount of Interest or Dividends Credited to Income 0 [42] 0 [46]
Affiliate investments | Waccamaw River, LLC    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance 4,489 10,730
Gross Additions 0 [40] 0 [44]
Gross Reductions (4,406) [41] (5,843) [45]
Amount of Realized Gain (Loss) 0 0
Amount of Unrealized Gain (Loss) (7) (398)
Fair value at ending balance 76 4,489
Amount of Interest or Dividends Credited to Income 161 [42] 907 [46]
Affiliate investments | Zeppelin Bidco Limited    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance 2,647 [72] 0 [73]
Gross Additions 140 [40],[72] 2,826 [44],[73]
Gross Reductions 0 [41],[72] (13) [45],[73]
Amount of Realized Gain (Loss) 0 [72] (4,835) [73]
Amount of Unrealized Gain (Loss) (124) [72] 4,669 [73]
Fair value at ending balance [72] 2,663 2,647
Amount of Interest or Dividends Credited to Income 139 [42],[72] 111 [46],[73]
Control investments    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance 82,977 [58] 79,663
Gross Additions 14,437 [59] 7,518 [48]
Gross Reductions (3,733) [60] (3,070) [49]
Amount of Realized Gain (Loss) (69) (24,453)
Amount of Unrealized Gain (Loss) (5,221) 23,319
Fair value at ending balance 88,391 82,977 [58]
Amount of Interest or Dividends Credited to Income 1,045 [61] 4,451 [50]
Control investments | Black Angus Steakhouses, LLC    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance [74] 0 2,744
Gross Additions [48],[74]   0
Gross Reductions [49],[74]   (610)
Amount of Realized Gain (Loss) [74]   (17,109)
Amount of Unrealized Gain (Loss) [74]   14,975
Fair value at ending balance [74]   0
Amount of Interest or Dividends Credited to Income [50],[74]   (6)
Control investments | MVC Automotive Group GmbH    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance 14,143 [75] 13,741 [74]
Gross Additions 8,682 [59],[75] 6,338 [48],[74]
Gross Reductions (3,733) [60],[75] (2,341) [49],[74]
Amount of Realized Gain (Loss) (63) [75] 3 [74]
Amount of Unrealized Gain (Loss) (5,779) [75] (3,598) [74]
Fair value at ending balance [75] 13,250 14,143
Amount of Interest or Dividends Credited to Income 182 [61],[75] 85 [50],[74]
Control investments | MVC Private Equity Fund LP    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance 0 11
Gross Additions [48]   0
Gross Reductions [49]   (116)
Amount of Realized Gain (Loss)   (7,349)
Amount of Unrealized Gain (Loss)   7,454
Fair value at ending balance   0
Amount of Interest or Dividends Credited to Income [50]   0
Control investments | Security Holdings B.V.    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Fair value at beginning balance 68,834 [75] 63,167 [74]
Gross Additions 5,755 [59],[75] 1,180 [48],[74]
Gross Reductions 0 [60],[75] (3) [49],[74]
Amount of Realized Gain (Loss) (6) [75] 2 [74]
Amount of Unrealized Gain (Loss) 558 [75] 4,488 [74]
Fair value at ending balance [75] 75,141 68,834
Amount of Interest or Dividends Credited to Income $ 863 [61],[75] $ 4,372 [50],[74]
[1] Portfolio company does not issue shares or units; member interest is based on commitments.
[2] In accordance with the 1940 Act, the Company is deemed to be an “affiliated person” of the portfolio company as the Company owns at least 5% but not more than 25% of the portfolio company’s outstanding voting securities and does not otherwise control (“non-controlled affiliate”). Transactions related to investments in non-controlled “Affiliate Investments” for the six months ended June 30, 2026 were as follows:
December 31, 2025
Value		Gross Additions
(a)		Gross Reductions (b)Amount of Realized Gain (Loss)Amount of Unrealized Gain (Loss)June 30,
2026
Value		Amount of Interest or Dividends Credited to Income(c)
Portfolio CompanyType of Investment
Biolam(d)
First Lien Senior Secured Term Loan (EURIBOR + 4.50%, 6.6% PIK)(e)
$1,731 $— $— $— $(419)$1,312 $— 
Ordinary Shares
(42,639,498 shares)
— — — — — — — 
1,731 — — — (419)1,312 — 
Celebration Bidco, LLC(d)
First Lien Senior Secured Term Loan (SOFR + 8.00%, 11.7% Cash)
8,463 43 — — 72 8,578 512 
Common Stock
(1,243,071 shares)
8,925 — — — 1,430 10,355 — 
17,388 43 — — 1,502 18,933 512 
Coastal Marina Holdings, LLC(d)
Subordinated Term Loan
(8.0% Cash)
15,891 55 — — 55 16,001 714 
Subordinated Term Loan
(8.0% Cash)
7,327 20 — — 30 7,377 324 
LLC Units (3,518,097 units)
19,983 — — — 563 20,546 — 
43,201 75 — — 648 43,924 1,038 
December 31, 2025
Value		Gross Additions
(a)		Gross Reductions (b)Amount of Realized Gain (Loss)Amount of Unrealized Gain (Loss)June 30,
2026
Value		Amount of Interest or Dividends Credited to Income(c)
Portfolio CompanyType of Investment
Eclipse Business Capital, LLC(d)
First Lien Senior Secured Term Loan (SOFR + 6.60%, 10.2% Cash)
$— $3,333 $— $— $— $3,333 $33 
Revolver (SOFR + 6.60%, 10.2% Cash)
9,909 27,736 (24,757)— (9)12,879 501 
Second Lien Senior Secured Term Loan (7.5% Cash)
4,546 4 — — (4)4,546 176 
LLC units (89,447,396 units)
139,539 — — — — 139,539 8,067 
153,994 31,073 (24,757)— (13)160,297 8,777 
EMI Porta Holdco LLC(d)
First Lien Senior Secured Term Loan (SOFR + 5.50%, 9.1% Cash)
— 4,656 — — — 4,656 59 
Revolver (SOFR + 5.50%, 9.1% Cash)
— 127 (127)— — — 2 
Preferred Stock
(2,322,860 shares)
(12.0% PIK)
— 2,323 — — 46 2,369 — 
Common Stock
(6,017,772 shares)
— 3,004 — — (56)2,948 — 
— 10,110 (127)— (10)9,973 61 
Jocassee Partners LLC
9.1% Member Interest
37,986 — — — (4,806)33,180 5,709 
37,986 — — — (4,806)33,180 5,709 
Policy Services(d)
First Lien Senior Secured Term Loan (SOFR + 6.00%, 9.9% Cash, 4.0% PIK)
— 50,122 — — (226)49,896 1,995 
Class A Units
(251.4 units)
— — — — — — — 
Warrants - Class A
(2.5582 units)
— — — — — — — 
Warrants - Class B
(0.8634 units)
— — — — — — — 
Warrants - Class CC
(0.0888 units)
— — — — — — — 
Warrants - Class D
(0.2471 units)
— — — — — — 
— 50,122 — — (226)49,896 1,995 
Rocade Holdings LLC(d)
Second Lien Senior Secured Term Loan (SOFR + 8.00%, 11.7% Cash)
2,667 9,282 — — (19)11,930 329 
Preferred LP Units (71,000 units) (SOFR + 6.00%, 9.7% Cash)
89,450 4,270 (4,681)— 2 89,041 4,270 
Common LP Units (23.8 units)
3,596 — — — 1,091 4,687 1,236 
95,713 13,552 (4,681)— 1,074 105,658 5,835 
Sierra Senior Loan Strategy JV I LLC
89.01% Member Interest
16,404 — (16,437)— 33 — 223 
16,404 — (16,437)— 33 — 223 
Skyvault Holdings LLC(d)
First Lien Senior Secured Term Loan (12.0% Cash)
16,020 123 — — — 16,143 971 
LLC Units (5,381,304.8 units)
5,339 41 (2,140)— 1,763 5,003 1,899 
21,359 164 (2,140)— 1,763 21,146 2,870 
Thompson Rivers LLC
16.0% Member Interest
4,271 — (1,598)— 37 2,710 — 
4,271 — (1,598)— 37 2,710 — 
Waccamaw River LLC
20% Member Interest
4,489 — (4,406)— (7)76 161 
4,489 — (4,406)— (7)76 161 
December 31, 2025
Value		Gross Additions
(a)		Gross Reductions (b)Amount of Realized Gain (Loss)Amount of Unrealized Gain (Loss)June 30,
2026
Value		Amount of Interest or Dividends Credited to Income(c)
Portfolio CompanyType of Investment
Zeppelin Bidco Limited(d)
First Lien Senior Secured Term Loan (SONIA + 6.50%, 10.2% Cash)
$2,565 $140 $— $— $(42)$2,663 $139 
Ordinary Shares (879 shares)
82 — — — (82)— — 
2,647 140 — — (124)2,663 139 
Total Affiliate Investments$399,183 $105,279 $(54,146)$— $(548)$449,768 $27,320 
(a)     Gross additions include increases in the cost basis of investments resulting from new investments, follow-on investments, payment-in-kind interest or dividends, the amortization of any unearned income or discounts on debt investments, as applicable.
(b)    Gross reductions include decreases in the total cost basis of investments resulting from principal repayments, sales and return of capital.
(c) Represents the total amount of interest, fees or dividends credited to income for the portion of the year an investment was included in the Affiliate category.
(d) The fair value of the investment was determined using significant unobservable inputs.
(e) Non-accrual investment
[3] Investment is not a qualifying investment as defined under Section 55(a) of the 1940 Act. Non-qualifying assets represent 22.1% of total investments at fair value as of June 30, 2026. Qualifying assets must represent at least 70% of total assets at the time of acquisition of any additional non-qualifying assets. If at any time qualifying assets do not represent at least 70% of the Company’s total assets, the Company will be precluded from acquiring any additional non-qualifying asset until such time as it complies with the requirements of Section 55(a).
[4] Portfolio company does not issue shares or units, member interest is based on commitments.
[5] Position or portion thereof is an unfunded loan or equity commitment.
[6] In accordance with the 1940 Act, the Company is deemed to be an “affiliated person” of the portfolio company as the Company owns at least 5% but not more than 25% of the portfolio company’s outstanding voting securities and does not otherwise control (“non-controlled affiliate”). Transactions related to investments in non-controlled “Affiliate Investments” for the year ended December 31, 2025 were as follows:
December 31, 2024
Value		Gross Additions
(a)		Gross Reductions (b)Amount of Realized Gain (Loss)Amount of Unrealized Gain (Loss)December 31,
2025
 Value		Amount of Interest or Dividends Credited to Income(c)
Portfolio CompanyType of Investment
Biolam(d)
First Lien Senior Secured Term Loan (EURIBOR + 4.50%, 6.5% PIK)(e)
$— $1,258 $(128)$44 $557 $1,731 $(27)
Ordinary Shares
(42,639,498 shares)
— — — — — — — 
— 1,258 (128)44 557 1,731 (27)
Celebration Bidco, LLC(d)
First Lien Senior Secured Term Loan (SOFR + 8.00%, 11.7% PIK)
6,414 2,266 — — (217)8,463 987 
Common Stock
(1,243,071 shares)
11,262 — — — (2,337)8,925 — 
17,676 2,266 — — (2,554)17,388 987 
Coastal Marina Holdings, LLC(d)
Subordinated Term Loan
(8.0% Cash)
15,770 103 — — 18 15,891 1,432 
Subordinated Term Loan
(8.0% Cash)
7,271 38 — — 18 7,327 650 
LLC Units (3,518,097 units)
16,852 — — — 3,131 19,983 — 
39,893 141 — — 3,167 43,201 2,082 
Eclipse Business Capital, LLC(d)
Revolver (SOFR + 6.50%, 10.3% Cash)
10,091 8,650 (8,820)— (12)9,909 1,116 
Second Lien Senior Secured Term Loan (7.5% Cash)
4,545 7 — — (6)4,546 354 
LLC units (89,447,396 units)
136,855 23 — — 2,661 139,539 16,551 
151,491 8,680 (8,820)— 2,643 153,994 18,021 
December 31, 2024
Value		Gross Additions
(a)		Gross Reductions (b)Amount of Realized Gain (Loss)Amount of Unrealized Gain (Loss)December 31,
2025
 Value		Amount of Interest or Dividends Credited to Income(c)
Portfolio CompanyType of Investment
Jocassee Partners LLC
9.1% Member Interest
$40,761 $— $— $— $(2,775)$37,986 $5,709 
40,761 — — — (2,775)37,986 5,709 
Rocade Holdings LLC(d)
Second Lien Senior Secured Term Loan (SOFR + 8.00%, 11.9% Cash)
— 2,671 — — (4)2,667 38 
Preferred LP Units (71,000 units) (SOFR + 6.00%, 9.9% PIK)
83,000 8,818 (2,355)— (13)89,450 8,818 
Common LP Units (23.8 units)
243 — — — 3,353 3,596 308 
83,243 11,489 (2,355)— 3,336 95,713 9,164 
Sierra Senior Loan Strategy JV I LLC
89.01% Member Interest
41,453 — (20,472)— (4,577)16,404 7,121 
41,453 — (20,472)— (4,577)16,404 7,121 
Skyvault Holdings LLC(d)
First Lien Senior Secured Term Loan (12.0% Cash)
3,586 12,615 (181)— — 16,020 1,409 
LLC Units (5,340,186.4 units)
1,195 4,153 — — (9)5,339 — 
4,781 16,768 (181)— (9)21,359 1,409 
Thompson Rivers LLC
16.0% Member Interest
7,208 — (2,876)— (61)4,271 — 
7,208 — (2,876)— (61)4,271 — 
Waccamaw River LLC
20% Member Interest
10,730 — (5,843)— (398)4,489 907 
10,730 — (5,843)— (398)4,489 907 
Zeppelin Bidco Limited(d)
First Lien Senior Secured Term Loan (SONIA + 6.50%, 10.5% Cash)
— 2,826 (13)(4,835)4,587 2,565 111 
Ordinary Shares
(879 shares)
— — — — 82 82 — 
— 2,826 (13)(4,835)4,669 2,647 111 
Total Affiliate Investments$397,236 $43,428 $(40,688)$(4,791)$3,998 $399,183 $45,484 

(a)     Gross additions include increases in the cost basis of investments resulting from new investments, follow-on investments, payment-in-kind interest or dividends, the amortization of any unearned income or discounts on debt investments, as applicable.
(b)    Gross reductions include decreases in the total cost basis of investments resulting from principal repayments, sales and return of capital.
(c) Represents the total amount of interest, fees or dividends credited to income for the portion of the year an investment was included in the Affiliate category.
(d) The fair value of the investment was determined using significant unobservable inputs.
(e) Non-accrual investment
[7] Investment is not a qualifying investment as defined under Section 55(a) of the 1940 Act. Non-qualifying assets represent 24.0% of total investments at fair value as of December 31, 2025. Qualifying assets must represent at least 70% of total assets at the time of acquisition of any additional non-qualifying assets. If at any time qualifying assets do not represent at least 70% of the Company’s total assets, the Company will be precluded from acquiring any additional non-qualifying asset until such time as it complies with the requirements of Section 55(a).
[8] Investment is non-income producing.
[9] Investment was purchased as part of the Sierra Merger and is part of the Prior Sierra Reference Portfolio for purposes of the Prior Sierra Credit Support Agreement.
[10] Investment is non-income producing.
[11] PIK non-accrual investment.
[12] The fair value of the investment was determined using significant unobservable inputs.
[13] Payment-in-kind (“PIK”) non-accrual investment..
[14] The fair value of the investment was determined using significant unobservable inputs.
[15] The interest rate on these loans is subject to 3 Month SOFR, which as of December 31, 2025 was 3.65166%.
[16] Debt investment includes interest rate floor feature.
[17] The interest rate on these loans is subject to 3 Month SOFR, which as of June 30, 2026 was 3.73372%.
[18] Debt investment includes interest rate floor feature.
[19] Position or portion thereof is an unfunded loan or equity commitment.
[20] The interest rate on these loans is subject to 3 Month EURIBOR, which as of December 31, 2025 was 2.02600%.
[21] The interest rate on these loans is subject to 3 Month EURIBOR, which as of June 30, 2026 was 2.32400%.
[22] The interest rate on these loans is subject to 1 Month SOFR, which as of June 30, 2026 was 3.65197%.
[23] The interest rate on these loans is subject to 1 Month SOFR, which as of December 31, 2025 was 3.68751%.
[24] Non-accrual investment.
[25] Non-accrual investment.
[26] The interest rate on these loans is subject to 3 Month SONIA, which as of June 30, 2026 was 3.74700%.
[27] The interest rate on these loans is subject to 6 Month EURIBOR, which as of December 31, 2025 was 2.10700%.
[28] The interest rate on these loans is subject to 6 Month EURIBOR, which as of June 30, 2026 was 2.56800%.
[29] The interest rate on these loans is subject to 6 Month SOFR, which as of June 30, 2026 was 3.84940%.
[30] The interest rate on these loans is subject to 3 Month SONIA, which as of December 31, 2025 was 3.71660%.
[31] The interest rate on these loans is subject to 6 Month SONIA, which as of December 31, 2025 was 3.64430%.
[32] The interest rate on these loans is subject to 6 Month SONIA, which as of June 30, 2026 was 3.76300%.
[33] The interest rate on these loans is subject to 6 Month SOFR, which as of December 31, 2025 was 3.57418%.
[34] The interest rate on these loans is subject to 3 Month BBSY, which as of December 31, 2025 was 3.73750%.
[35] The interest rate on these loans is subject to 3 Month BBSY, which as of June 30, 2026 was 4.46150%.
[36] The interest rate on these loans is subject to 1 Month CORRA, which as of June 30, 2026 was 2.27952%.
[37] The interest rate on these loans is subject to 1 Month EURIBOR, which as of December 31, 2025 was 1.93900%.
[38] The interest rate on these loans is subject to 1 Month EURIBOR, which as of June 30, 2026 was 2.20100%.
[39] Non-accrual investment
[40] Gross additions include increases in the cost basis of investments resulting from new investments, follow-on investments, payment-in-kind interest or dividends, the amortization of any unearned income or discounts on debt investments, as applicable.
[41] Gross reductions include decreases in the total cost basis of investments resulting from principal repayments, sales and return of capital.
[42] Represents the total amount of interest, fees or dividends credited to income for the portion of the year an investment was included in the Affiliate category.
[43] Non-accrual investment
[44] Gross additions include increases in the cost basis of investments resulting from new investments, follow-on investments, payment-in-kind interest or dividends, the amortization of any unearned income or discounts on debt investments, as applicable.
[45] Gross reductions include decreases in the total cost basis of investments resulting from principal repayments, sales and return of capital.
[46] Represents the total amount of interest, fees or dividends credited to income for the portion of the year an investment was included in the Affiliate category.
[47] Non-accrual investment.
[48] Gross additions include increases in the cost basis of investments resulting from new investments, follow-on investments, payment-in-kind interest or dividends, the amortization of any unearned income or discounts on debt investments, as applicable.
[49] Gross reductions include decreases in the total cost basis of investments resulting from principal repayments, sales and return of capital.
[50] Represents the total amount of interest, fees or dividends credited to income for the portion of the year an investment was included in the Control category.
[51] The interest rate on these loans is subject to 3 Month CORRA, which as of December 31, 2025 was 2.30000%.
[52] The interest rate on these loans is subject to 3 Month CORRA, which as of June 30, 2026 was 2.34000%.
[53] The interest rate on these loans is subject to 3 Month BKBM, which as of December 31, 2025 was 2.49000%.
[54] The interest rate on these loans is subject to 3 Month BKBM, which as of June 30, 2026 was 2.68000%.
[55] The interest rate on these loans is subject to 1 Month SARON, which as of December 31, 2025 was -0.04570%.
[56] Investment was purchased as part of the Sierra Merger and is part of the New Sierra Reference Portfolio for purposes of the New Sierra Credit Support Agreement.
[57] Investment was purchased from MVC Capital, Inc. (“MVC”) in connection with the MVC Acquisition (as defined in “Note 2. Agreements and Related Party Transactions”).
[58] As defined in the 1940 Act, the Company is deemed to be both an “affiliated person” and “control” the portfolio company because it owns more than 25% of the portfolio company’s outstanding voting securities or it has the power to exercise control over the management or policies of such portfolio company (including through a management agreement). Transactions as of and during the year ended December 31, 2025 in which the portfolio company is deemed to be a “Control Investment” of the Company were as follows:
December 31, 2024
Value		Gross Additions
(a)		Gross Reductions (b)Amount of Realized Gain (Loss)Amount of Unrealized Gain (Loss)December 31, 2025
Value		Amount of Interest or Dividends Credited to Income(c)
Portfolio CompanyType of Investment
Black Angus Steakhouses, LLC(d)
First Lien Senior Secured Term Loan (14.4% PIK)(e)
$2,744 $— $(610)$(7,481)$5,347 $— $(6)
First Lien Senior Secured Term Loan (10.0% PIK)(e)
— — — (9,628)9,628 — — 
LLC Units (44.6 units)
— — — — — — — 
2,744 — (610)(17,109)14,975 — (6)
MVC Automotive Group GmbH(d)
First Lien Senior Secured Term Loan (7.0% Cash)
— 2,338 (2,341)3 — — 85 
Common Equity Interest (18,000 Shares)
13,741 4,000 — — (3,598)14,143 — 
13,741 6,338 (2,341)3 (3,598)14,143 85 
MVC Private Equity Fund LP
General Partnership Interest
(1,831.4 units)
— — — (183)183 — — 
Limited Partnership Interest
(71,790.4 units)
11 — (116)(7,166)7,271 — — 
11 — (116)(7,349)7,454 — — 
Security Holdings B.V(d)
Bridge Loan (5.0% PIK)
6,655 342 — — — 6,997 342 
Revolver (6.0% Cash)
5,333 165 (3)2 728 6,225 379 
Senior Unsecured Term Loan (6.0% Cash, 9.0% PIK)
2,293 299 — — 317 2,909 474 
Senior Subordinated Term Loan (3.1% PIK)
11,191 374 — — — 11,565 360 
Common Stock Series A (17,100 shares)
399 — — — 37 436 — 
Common Stock Series B (1,236 shares)
37,296 — — — 3,406 40,702 2,817 
63,167 1,180 (3)2 4,488 68,834 4,372 
Total Control Investments$79,663 $7,518 $(3,070)$(24,453)$23,319 $82,977 $4,451 
(a) Gross additions include increases in the cost basis of investments resulting from new investments, follow-on investments, payment-in-kind interest or dividends, the amortization of any unearned income or discounts on debt investments, as applicable.
(b)     Gross reductions include decreases in the total cost basis of investments resulting from principal repayments, sales and return of capital.
(c)    Represents the total amount of interest, fees or dividends credited to income for the portion of the year an investment was included in the Control category.
(d) The fair value of the investment was determined using significant unobservable inputs.
(e) Non-accrual investment.
[59] Gross additions include increases in the cost basis of investments resulting from new investments, follow-on investments, payment-in-kind interest or dividends, the amortization of any unearned income or discounts on debt investments, as applicable.
[60] Gross reductions include decreases in the total cost basis of investments resulting from principal repayments, sales and return of capital.
[61] Represents the total amount of interest, fees or dividends credited to income for the portion of the year an investment was included in the Control category.
[62] As defined in the 1940 Act, the Company is deemed to be both an “affiliated person” and “control” the portfolio company because it owns more than 25% of the portfolio company’s outstanding voting securities or it has the power to exercise control over the management or policies of such portfolio company (including through a management agreement). Transactions as of and during the six months ended June 30, 2026 in which the portfolio company is deemed to be a “Control Investment” of the Company were as follows:
December 31, 2025
Value		Gross Additions
(a)		Gross Reductions (b)Amount of Realized Gain (Loss)Amount of Unrealized Gain (Loss)June 30,
2026
Value		Amount of Interest or Dividends Credited to Income(c)
Portfolio CompanyType of Investment
MVC Automotive Group GmbH(d)
First Lien Senior Secured Term Loan (EURIBOR + 7.65%, 9.9% Cash)
$— $5,582 $(3,733)$(63)$(70)$1,716 $155 
First Lien Senior Secured Term Loan (7.7% Cash)
— 3,100 — — (13)3,087 27 
Common Equity Interest (25,404 Shares)
14,143 — — — (5,696)8,447 — 
14,143 8,682 (3,733)(63)(5,779)13,250 182 
Security Holdings B.V(d)
Bridge Loan (5.0% PIK)
6,997 176 — — — 7,173 176 
Revolver (6.0% PIK)
6,225 5,179 — (6)(414)10,984 279 
Senior Subordinated Term Loan (3.1% PIK)
11,565 182 — — — 11,747 182 
Senior Unsecured Term Loan (15.0% PIK)
2,909 218 — — (78)3,049 226 
Common Stock Series A (17,100 shares)
436 — — — 11 447 — 
Common Stock Series B (1,236 shares)
40,702 — — — 1,039 41,741 — 
68,834 5,755 — (6)558 75,141 863 
Total Control Investments$82,977 $14,437 $(3,733)$(69)$(5,221)$88,391 $1,045 
(a) Gross additions include increases in the cost basis of investments resulting from new investments, follow-on investments, payment-in-kind interest or dividends, the amortization of any unearned income or discounts on debt investments, as applicable.
(b)     Gross reductions include decreases in the total cost basis of investments resulting from principal repayments, sales and return of capital.
(c)    Represents the total amount of interest, fees or dividends credited to income for the portion of the year an investment was included in the Control category.
(d) The fair value of the investment was determined using significant unobservable inputs.
[63] The interest rate on these loans is subject to 1 Month NIBOR, which as of December 31, 2025 was 3.89000%.
[64] The interest rate on these loans is subject to 1 Month NIBOR, which as of June 30, 2026 was 4.36000%.
[65] The interest rate on these loans is subject to 6 Month BBSY, which as of December 31, 2025 was 4.12100%.
[66] The interest rate on these loans is subject to 1 Month BBSY, which as of December 31, 2025 was 3.55000%.
[67] The interest rate on these loans is subject to 1 Month BBSY, which as of June 30, 2026 was 4.31030%.
[68] The interest rate on these loans is subject to 3 Month SARON, which as of December 31, 2025 was -0.04360%.
[69] The interest rate on these loans is subject to 3 Month SARON, which as of June 30, 2026 was -0.04220%
[70] The interest rate on these loans is subject to 3 Month STIBOR, which as of December 31, 2025 was 1.95800%.
[71] The interest rate on these loans is subject to 3 Month STIBOR, which as of June 30, 2026 was 1.97200%.
[72] The fair value of the investment was determined using significant unobservable inputs.
[73] The fair value of the investment was determined using significant unobservable inputs.
[74] The fair value of the investment was determined using significant unobservable inputs.
[75] The fair value of the investment was determined using significant unobservable inputs.