v3.26.1
Consolidated Schedule of Investments (unaudited) (Parenthetical) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended 12 Months Ended
Jun. 30, 2026
Jun. 30, 2026
Sep. 30, 2025
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1]   $ 8,555,251  
Net realized gain (loss) on investment transactions $ (22,391) (19,836)  
Fair value, beginning balance 9,616,525 [2] 9,616,525 [2] $ 8,555,251 [1]
Non-controlled affiliate company investments      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance   0  
Gross additions   2,744  
Gross reductions   0  
Net change in unrealized appreciation (depreciation)   (113)  
Net realized gain (loss) on investment transactions   0  
Fair value, beginning balance 2,631 [2] 2,631 [2] 0
Interest, dividend and fee income   5  
Investment, Identifier [Axis]: AAL Delaware | Senior secured      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[3],[4],[5]   5,005  
Fair value, beginning balance [1],[3],[4],[5]     5,005
Investment, Identifier [Axis]: ABC Legal Holdings, LLC | One stop 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6]   26,524  
Fair value, beginning balance 26,108 [2],[7],[8] 26,108 [2],[7],[8] 26,524 [1],[6]
Investment, Identifier [Axis]: ABC Legal Holdings, LLC | One stop 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6],[9]   (52)  
Fair value, beginning balance (107) [2],[8],[10] (107) [2],[8],[10] (52) [1],[6],[9]
Investment, Identifier [Axis]: ABC Legal Holdings, LLC | One stop 3      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6],[9]   (80)  
Fair value, beginning balance (165) [2],[8],[10] (165) [2],[8],[10] (80) [1],[6],[9]
Investment, Identifier [Axis]: ACP Ulysses Buyer, Inc. | One stop 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[8] 5,875 5,875  
Investment, Identifier [Axis]: ACP Ulysses Buyer, Inc. | One stop 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[8] 495 495  
Investment, Identifier [Axis]: AGL CLO 20 Ltd. | Structured Finance Note      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[4],[11],[12]   1,509  
Fair value, beginning balance 1,463 [2],[13],[14],[15] 1,463 [2],[13],[14],[15] 1,509 [1],[4],[11],[12]
Investment, Identifier [Axis]: AGL CLO 45, Ltd. | Structured Finance Note      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[14],[15],[16] 2,500 2,500  
Investment, Identifier [Axis]: AGL CLO 46, Ltd. | Structured Finance Note      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[14],[15],[16] 3,002 3,002  
Investment, Identifier [Axis]: AGL CLO 5, Ltd. | Structured Finance Note      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[14],[15],[16] 2,917 2,917  
Investment, Identifier [Axis]: AHP Health Partners, Inc. | Senior secured      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[4],[5],[6]   2,851  
Fair value, beginning balance [1],[4],[5],[6]     2,851
Investment, Identifier [Axis]: AI Titan Parent, Inc. | One stop 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6]   9,302  
Fair value, beginning balance 9,023 [2],[7],[8] 9,023 [2],[7],[8] 9,302 [1],[6]
Investment, Identifier [Axis]: AI Titan Parent, Inc. | One stop 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6],[9]   0  
Fair value, beginning balance 363 [2],[8] 363 [2],[8] 0 [1],[6],[9]
Investment, Identifier [Axis]: AI Titan Parent, Inc. | One stop 3      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6],[9]   0  
Fair value, beginning balance (35) [2],[8],[10] (35) [2],[8],[10] 0 [1],[6],[9]
Investment, Identifier [Axis]: AIMCO CLO 20, Ltd. | Structured Finance Note      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[13],[14],[15] 3,749 3,749  
Investment, Identifier [Axis]: AMBA Buyer, Inc. | One stop 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[17]   7,680  
Fair value, beginning balance 7,619 [2],[7] 7,619 [2],[7] 7,680 [1],[17]
Investment, Identifier [Axis]: AMBA Buyer, Inc. | One stop 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[17]   3,488  
Fair value, beginning balance 3,460 [2],[7] 3,460 [2],[7] 3,488 [1],[17]
Investment, Identifier [Axis]: AMBA Buyer, Inc. | One stop 3      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[17]   3,079  
Fair value, beginning balance 3,054 [2],[7] 3,054 [2],[7] 3,079 [1],[17]
Investment, Identifier [Axis]: AOT Packaging Products Acquisitionco, LLC | Senior secured      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[3],[5],[6]   17,899  
Fair value, beginning balance 16,721 [2],[8],[18],[19],[20] 16,721 [2],[8],[18],[19],[20] 17,899 [1],[3],[5],[6]
Investment, Identifier [Axis]: AP Adhesives Holdings, LLC | One stop 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6],[9]   0  
Fair value, beginning balance (158) [2],[8],[10] (158) [2],[8],[10] 0 [1],[6],[9]
Investment, Identifier [Axis]: AP Adhesives Holdings, LLC | One stop 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6],[9]   0  
Fair value, beginning balance (76) [2],[8],[10] (76) [2],[8],[10] 0 [1],[6],[9]
Investment, Identifier [Axis]: AP Adhesives Holdings, LLC | One stop 3      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6]   55,067  
Fair value, beginning balance 54,183 [2],[7],[8] 54,183 [2],[7],[8] 55,067 [1],[6]
Investment, Identifier [Axis]: API Holdings III, LLC | One stop 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[8] 389 389  
Investment, Identifier [Axis]: API Holdings III, LLC | One stop 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[8] 0 0  
Investment, Identifier [Axis]: API Holdings III, LLC | One stop 3      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[8] 0 0  
Investment, Identifier [Axis]: AQA Acquisition Holding, Inc. | Senior secured      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[3],[5],[6]   25,277  
Fair value, beginning balance 18,220 [2],[8],[18],[19],[20] 18,220 [2],[8],[18],[19],[20] 25,277 [1],[3],[5],[6]
Investment, Identifier [Axis]: AVG Intermediate Holdings AVG Subsidiary Holdings LLC | One stop      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6],[17]   11,578  
Fair value, beginning balance [1],[6],[17]     11,578
Investment, Identifier [Axis]: AVG Intermediate Holdings, LLC | One stop 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[8] 496 496  
Investment, Identifier [Axis]: AVG Intermediate Holdings, LLC | One stop 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[7],[21] 11,424 11,424  
Investment, Identifier [Axis]: Accelya Lux Finco S.A.R.L. | One stop      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[4],[17],[22],[23]   1,586  
Fair value, beginning balance [1],[4],[17],[22],[23]     1,586
Investment, Identifier [Axis]: Acquia, Inc. | One stop      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6]   9,956  
Fair value, beginning balance 9,857 [2],[8] 9,857 [2],[8] 9,956 [1],[6]
Investment, Identifier [Axis]: Acrisure, LLC | Senior secured 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[3],[5],[6]   25,758  
Fair value, beginning balance 22,659 [2],[8],[19],[20] 22,659 [2],[8],[19],[20] 25,758 [1],[3],[5],[6]
Investment, Identifier [Axis]: Acrisure, LLC | Senior secured 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[3],[5]   4,992  
Fair value, beginning balance 4,488 [2],[18],[20] 4,488 [2],[18],[20] 4,992 [1],[3],[5]
Investment, Identifier [Axis]: Action Termite Control, LLC | Common stock      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2] 71 71  
Investment, Identifier [Axis]: Action Termite Control, LLC | Preferred stock      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2] 377 377  
Investment, Identifier [Axis]: Action Termite Control, LLC | Senior secured 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[8] 60 60  
Investment, Identifier [Axis]: Action Termite Control, LLC | Senior secured 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[8] 2,132 2,132  
Investment, Identifier [Axis]: Action Termite Control, LLC | Senior secured 3      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[8],[10] 0 0  
Investment, Identifier [Axis]: Active Day, Inc. | One stop 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[7] 5,374 5,374  
Investment, Identifier [Axis]: Active Day, Inc. | One stop 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[8],[10] (5) (5)  
Investment, Identifier [Axis]: Active Day, Inc. | One stop 3      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[8] 1,837 1,837  
Investment, Identifier [Axis]: Acuity Eyecare Holdings, LLC | One stop      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[8] 10,343 10,343  
Investment, Identifier [Axis]: Advanced Cooling Technologies, Inc. | One stop 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[8] 416 416  
Investment, Identifier [Axis]: Advanced Cooling Technologies, Inc. | One stop 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[8] 0 0  
Investment, Identifier [Axis]: Aegion Corporation | Senior secured 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[3],[5],[6]   12,380  
Fair value, beginning balance [1],[3],[5],[6]     12,380
Investment, Identifier [Axis]: Aegion Corporation | Senior secured 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[3],[5]   1  
Fair value, beginning balance [1],[3],[5]     1
Investment, Identifier [Axis]: Agiliti Health, Inc. | Senior secured      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[5],[6]   9,487  
Fair value, beginning balance 9,471 [2],[8],[18],[20] 9,471 [2],[8],[18],[20] 9,487 [1],[5],[6]
Investment, Identifier [Axis]: Alera Group, Inc. | Senior secured      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[3],[5]   15,073  
Fair value, beginning balance 9,433 [2],[18],[19],[20] 9,433 [2],[18],[19],[20] 15,073 [1],[3],[5]
Investment, Identifier [Axis]: Amberfield Acquisition Co. | LLC interest      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2] 618 618  
Investment, Identifier [Axis]: Amberfield Acquisition Co. | One stop 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[17]   2,180  
Fair value, beginning balance 2,173 [2],[7] 2,173 [2],[7] 2,180 [1],[17]
Investment, Identifier [Axis]: Amberfield Acquisition Co. | One stop 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6]   54  
Fair value, beginning balance 235 [2],[8] 235 [2],[8] 54 [1],[6]
Investment, Identifier [Axis]: Amberfield Acquisition Co. | One stop 3      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6]   69  
Fair value, beginning balance 69 [2],[8] 69 [2],[8] 69 [1],[6]
Investment, Identifier [Axis]: Amberfield Acquisition Co. | One stop 4      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[8],[15],[18],[20] 12,553 12,553  
Investment, Identifier [Axis]: Amberfield Acquisition Co. | Preferred stock      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1]   536  
Fair value, beginning balance [1]     536
Investment, Identifier [Axis]: Anaplan, Inc. | One stop      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6]   9,925  
Fair value, beginning balance 9,604 [2],[7] 9,604 [2],[7] 9,925 [1],[6]
Investment, Identifier [Axis]: Anova Buyer, Inc. | One stop 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[8] 5,976 5,976  
Investment, Identifier [Axis]: Anova Buyer, Inc. | One stop 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[8] 212 212  
Investment, Identifier [Axis]: Anova Buyer, Inc. | One stop 3      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[8] 112 112  
Investment, Identifier [Axis]: Any Hour, LLC | One stop 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6]   29,072  
Fair value, beginning balance 28,825 [2],[7],[8],[24] 28,825 [2],[7],[8],[24] 29,072 [1],[6]
Investment, Identifier [Axis]: Any Hour, LLC | One stop 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6],[22]   5,239  
Fair value, beginning balance 4,497 [2],[8],[24] 4,497 [2],[8],[24] 5,239 [1],[6],[22]
Investment, Identifier [Axis]: Any Hour, LLC | One stop 3      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6]   2,592  
Fair value, beginning balance 3,999 [2],[8],[24] 3,999 [2],[8],[24] 2,592 [1],[6]
Investment, Identifier [Axis]: Any Hour, LLC | One stop 4      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6]   500  
Fair value, beginning balance 816 [2],[8],[24] 816 [2],[8],[24] 500 [1],[6]
Investment, Identifier [Axis]: Apex Group Treasury, LLC | Senior secured      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[4],[5],[6],[25]   10,701  
Fair value, beginning balance 10,293 [2],[8],[15],[18],[20],[26] 10,293 [2],[8],[15],[18],[20],[26] 10,701 [1],[4],[5],[6],[25]
Investment, Identifier [Axis]: Apex Service Partners, LLC | One stop 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6],[17]   17,890  
Fair value, beginning balance 17,543 [2],[7],[8] 17,543 [2],[7],[8] 17,890 [1],[6],[17]
Investment, Identifier [Axis]: Apex Service Partners, LLC | One stop 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6]   13,240  
Fair value, beginning balance 12,984 [2],[8] 12,984 [2],[8] 13,240 [1],[6]
Investment, Identifier [Axis]: Apex Service Partners, LLC | One stop 3      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6]   4,258  
Fair value, beginning balance 4,175 [2],[8] 4,175 [2],[8] 4,258 [1],[6]
Investment, Identifier [Axis]: Apex Service Partners, LLC | One stop 4      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6],[9]   0  
Fair value, beginning balance 598 [2],[8] 598 [2],[8] 0 [1],[6],[9]
Investment, Identifier [Axis]: Apex Service Partners, LLC | One stop 5      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6]   7,666  
Fair value, beginning balance 7,518 [2],[8] 7,518 [2],[8] 7,666 [1],[6]
Investment, Identifier [Axis]: Apex Service Partners, LLC | One stop 6      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6]   12,842  
Fair value, beginning balance 22,278 [2],[8] 22,278 [2],[8] 12,842 [1],[6]
Investment, Identifier [Axis]: Apidos CLO LIII | Structured Finance Note      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[14],[15],[16] 2,391 2,391  
Investment, Identifier [Axis]: Apidos CLO LIII | Structured Finance Note 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[4],[12],[27]   2,037  
Fair value, beginning balance [1],[4],[12],[27]     2,037
Investment, Identifier [Axis]: Apidos CLO LIII | Structured Finance Note 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[4],[12],[27]   2,417  
Fair value, beginning balance [1],[4],[12],[27]     2,417
Investment, Identifier [Axis]: Apidos CLO XXVIII | Structured Finance Note      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[4],[12],[27]   4,552  
Fair value, beginning balance 4,440 [2],[14],[15],[16] 4,440 [2],[14],[15],[16] 4,552 [1],[4],[12],[27]
Investment, Identifier [Axis]: Appfire Technologies, LLC | One stop      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[7],[8] 9,964 9,964  
Investment, Identifier [Axis]: Appfire Technologies, LLC | One stop 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[17]   9,974  
Fair value, beginning balance [1],[17]     9,974
Investment, Identifier [Axis]: Appfire Technologies, LLC | One stop 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6],[9]   (225)  
Fair value, beginning balance [1],[6],[9]     (225)
Investment, Identifier [Axis]: Aptive Environmental, LLC | One stop 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[7],[8],[21] 73,125 73,125  
Investment, Identifier [Axis]: Aptive Environmental, LLC | One stop 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[8] 1,029 1,029  
Investment, Identifier [Axis]: Aptive Environmental, LLC | One stop 3      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[8],[10] 0 0  
Investment, Identifier [Axis]: Apttus Corporation | Senior secured      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[3],[6]   16,245  
Fair value, beginning balance 13,897 [2],[8],[19] 13,897 [2],[8],[19] 16,245 [1],[3],[6]
Investment, Identifier [Axis]: Arch Global CCT Holdings Corp. | Senior secured 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[17]   6,588  
Fair value, beginning balance 6,094 [2],[7] 6,094 [2],[7] 6,588 [1],[17]
Investment, Identifier [Axis]: Arch Global CCT Holdings Corp. | Senior secured 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[17]   4,283  
Fair value, beginning balance 3,962 [2],[7] 3,962 [2],[7] 4,283 [1],[17]
Investment, Identifier [Axis]: Ares LVII CLO, Ltd. | Structured Finance Note      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[14],[15],[16] 2,933 2,933  
Investment, Identifier [Axis]: Ares LXIII CLO, Ltd. | Structured Finance Note      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[4],[12],[27]   3,538  
Fair value, beginning balance 3,395 [2],[14],[15],[16] 3,395 [2],[14],[15],[16] 3,538 [1],[4],[12],[27]
Investment, Identifier [Axis]: Ares LXXVIII CLO, Ltd. | Structured Finance Note      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[14],[15],[16] 5,015 5,015  
Investment, Identifier [Axis]: Arnott, LLC | One stop 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6]   4,750  
Fair value, beginning balance 4,600 [2],[7] 4,600 [2],[7] 4,750 [1],[6]
Investment, Identifier [Axis]: Arnott, LLC | One stop 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6]   345  
Fair value, beginning balance 570 [2],[8] 570 [2],[8] 345 [1],[6]
Investment, Identifier [Axis]: Artifact Bidco, Inc. | One stop 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6]   5,024  
Fair value, beginning balance 5,024 [2],[7],[8] 5,024 [2],[7],[8] 5,024 [1],[6]
Investment, Identifier [Axis]: Artifact Bidco, Inc. | One stop 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6],[9]   0  
Fair value, beginning balance 0 [2],[8],[10] 0 [2],[8],[10] 0 [1],[6],[9]
Investment, Identifier [Axis]: Artifact Bidco, Inc. | One stop 3      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6],[9]   0  
Fair value, beginning balance 0 [2],[8],[10] 0 [2],[8],[10] 0 [1],[6],[9]
Investment, Identifier [Axis]: Artifact Bidco, Inc. | One stop 4      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6],[9]   0  
Fair value, beginning balance 0 [2],[8],[10] 0 [2],[8],[10] 0 [1],[6],[9]
Investment, Identifier [Axis]: Ascend Learning, LLC | Senior secured      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[3],[5],[6]   22,491  
Fair value, beginning balance 21,811 [2],[8],[18],[19],[20] 21,811 [2],[8],[18],[19],[20] 22,491 [1],[3],[5],[6]
Investment, Identifier [Axis]: Ashco, LLC | Senior secured      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[3],[5]   37,685  
Fair value, beginning balance 22,508 [2],[18],[19],[20] 22,508 [2],[18],[19],[20] 37,685 [1],[3],[5]
Investment, Identifier [Axis]: Aspire Bakeries Holdings, LLC | Senior secured      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[3],[6]   7,299  
Fair value, beginning balance 2,562 [2],[18] 2,562 [2],[18] 7,299 [1],[3],[6]
Investment, Identifier [Axis]: Athenahealth, Inc. | Senior secured      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[4],[5],[6]   12,723  
Fair value, beginning balance [1],[4],[5],[6]     12,723
Investment, Identifier [Axis]: Atlas Bidco Pty Ltd | One stop 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[8],[15],[28],[29] 217 217  
Investment, Identifier [Axis]: Atlas Bidco Pty Ltd | One stop 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[8],[15],[28],[29] 0 0  
Investment, Identifier [Axis]: Atlas Bidco Pty Ltd | One stop 3      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[8],[10],[15],[28],[29] (2) (2)  
Investment, Identifier [Axis]: Audax Senior Debt CLO 6, LLC | Structured Finance Note      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[15] 2,475 2,475  
Investment, Identifier [Axis]: Avalara, Inc. | Senior secured      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[8],[18],[19],[20] 15,155 15,155  
Investment, Identifier [Axis]: Avalara, Inc. | Senior secured 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[3],[5]   500  
Fair value, beginning balance [1],[3],[5]     500
Investment, Identifier [Axis]: Avalara, Inc. | Senior secured 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[5],[6]   11,988  
Fair value, beginning balance [1],[5],[6]     11,988
Investment, Identifier [Axis]: Ave Holdings III Corp. | One stop      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[7],[21] 12,808 12,808  
Investment, Identifier [Axis]: Ave Holdings III, Corp | One stop      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[17],[30]   12,976  
Fair value, beginning balance [1],[17],[30]     12,976
Investment, Identifier [Axis]: Azul Systems, Inc. | Senior secured      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[17]   3,000  
Fair value, beginning balance [1],[17]     3,000
Investment, Identifier [Axis]: Azurite Intermediate Holdings, Inc. | One stop 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6]   17,541  
Fair value, beginning balance 17,235 [2],[8] 17,235 [2],[8] 17,541 [1],[6]
Investment, Identifier [Axis]: Azurite Intermediate Holdings, Inc. | One stop 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[17]   7,718  
Fair value, beginning balance 7,583 [2],[7] 7,583 [2],[7] 7,718 [1],[17]
Investment, Identifier [Axis]: Azurite Intermediate Holdings, Inc. | One stop 3      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6],[9]   0  
Fair value, beginning balance (42) [2],[8],[10] (42) [2],[8],[10] 0 [1],[6],[9]
Investment, Identifier [Axis]: BCC Middle Market CLO 2023-2, LLC | Structured Finance Note      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[14],[15] 12,750 12,750  
Investment, Identifier [Axis]: BCPE Pequod Buyer | Senior secured      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[3],[5],[6]   13,636  
Fair value, beginning balance 16,504 [2],[8],[18],[19],[20] 16,504 [2],[8],[18],[19],[20] 13,636 [1],[3],[5],[6]
Investment, Identifier [Axis]: BECO Holding Company, Inc. | One stop 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[30]   1,427  
Fair value, beginning balance 2,105 [2],[8],[21] 2,105 [2],[8],[21] 1,427 [1],[30]
Investment, Identifier [Axis]: BECO Holding Company, Inc. | One stop 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6],[9]   0  
Fair value, beginning balance (11) [2],[8],[10] (11) [2],[8],[10] 0 [1],[6],[9]
Investment, Identifier [Axis]: BHG Holdings, LLC | One stop 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6],[30]   103,236  
Fair value, beginning balance 101,683 [2],[7],[8],[21] 101,683 [2],[7],[8],[21] 103,236 [1],[6],[30]
Investment, Identifier [Axis]: BHG Holdings, LLC | One stop 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6],[9]   0  
Fair value, beginning balance (98) [2],[8],[10] (98) [2],[8],[10] 0 [1],[6],[9]
Investment, Identifier [Axis]: BHG Holdings, LLC | One stop 3      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6],[9]   0  
Fair value, beginning balance (224) [2],[8],[10] (224) [2],[8],[10] 0 [1],[6],[9]
Investment, Identifier [Axis]: BJH Holdings III Corp. | One stop 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[17]   9,748  
Fair value, beginning balance 9,673 [2],[7] 9,673 [2],[7] 9,748 [1],[17]
Investment, Identifier [Axis]: BJH Holdings III Corp. | One stop 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[30]   5,301  
Fair value, beginning balance 5,261 [2],[21] 5,261 [2],[21] 5,301 [1],[30]
Investment, Identifier [Axis]: Bain Capital Credit CLO 2022-1, Ltd. | Structured Finance Note      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[14],[15],[16] 8,747 8,747  
Investment, Identifier [Axis]: Bain Capital Credit CLO 2023-4, Ltd. | Structured Finance Note      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[14],[15],[16] 7,643 7,643  
Investment, Identifier [Axis]: Bain Capital Credit CLO 2025-3, Limited | Structured Finance Note      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[4],[12],[27]   4,039  
Fair value, beginning balance 3,920 [2],[14],[15],[16] 3,920 [2],[14],[15],[16] 4,039 [1],[4],[12],[27]
Investment, Identifier [Axis]: Bain Capital Credit CLO 2025-4, Limited | Structured Finance Note      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[4],[27]   2,000  
Fair value, beginning balance 1,995 [2],[14],[15],[16] 1,995 [2],[14],[15],[16] 2,000 [1],[4],[27]
Investment, Identifier [Axis]: Bain Capital Credit CLO 2025-5, Ltd. | Structured Finance Note      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[14],[15],[16] 1,997 1,997  
Investment, Identifier [Axis]: Baker Tilly Advisory Group, LP | One stop 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6]   19,434  
Fair value, beginning balance 19,431 [2],[7],[8] 19,431 [2],[7],[8] 19,434 [1],[6]
Investment, Identifier [Axis]: Baker Tilly Advisory Group, LP | One stop 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6],[9]   0  
Fair value, beginning balance (21) [2],[8],[10] (21) [2],[8],[10] 0 [1],[6],[9]
Investment, Identifier [Axis]: Baker Tilly Advisory Group, LP | One stop 3      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6]   13,369  
Fair value, beginning balance 15,176 [2],[8] 15,176 [2],[8] 13,369 [1],[6]
Investment, Identifier [Axis]: Baker Tilly Advisory Group, LP | One stop 4      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6],[9]   0  
Fair value, beginning balance 2,656 [2],[8] 2,656 [2],[8] 0 [1],[6],[9]
Investment, Identifier [Axis]: Balboa Bay Loan Funding 2025-2, Ltd. | Structured Finance Note      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[14],[15],[16] 4,017 4,017  
Investment, Identifier [Axis]: Ballyrock CLO 30, Ltd. | Structured Finance Note      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[4],[27]   3,030  
Fair value, beginning balance 3,011 [2],[14],[15],[16] 3,011 [2],[14],[15],[16] 3,030 [1],[4],[27]
Investment, Identifier [Axis]: Ballyrock CLO 32, Ltd. | Structured Finance Note      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[14],[15],[16] 5,000 5,000  
Investment, Identifier [Axis]: Bamboo US Bidco LLC | One stop 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[17]   8,006  
Fair value, beginning balance [1],[17]     8,006
Investment, Identifier [Axis]: Bamboo US Bidco LLC | One stop 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6],[31]   5,846  
Fair value, beginning balance [1],[6],[31]     5,846
Investment, Identifier [Axis]: Bamboo US Bidco LLC | One stop 3      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6]   1,225  
Fair value, beginning balance [1],[6]     1,225
Investment, Identifier [Axis]: Bamboo US Bidco LLC | One stop 4      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6]   1,202  
Fair value, beginning balance [1],[6]     1,202
Investment, Identifier [Axis]: Bamboo US Bidco LLC | One stop 5      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6]   0  
Fair value, beginning balance [1],[6]     0
Investment, Identifier [Axis]: Bamboo US Bidco LLC | One stop 6      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6],[9]   0  
Fair value, beginning balance [1],[6],[9]     0
Investment, Identifier [Axis]: Bamboo US Bidco, LLC | One stop 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[7] 7,872 7,872  
Investment, Identifier [Axis]: Bamboo US Bidco, LLC | One stop 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[8],[29] 5,596 5,596  
Investment, Identifier [Axis]: Bamboo US Bidco, LLC | One stop 3      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[8] 1,204 1,204  
Investment, Identifier [Axis]: Bamboo US Bidco, LLC | One stop 4      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[8] 1,281 1,281  
Investment, Identifier [Axis]: Bamboo US Bidco, LLC | One stop 5      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[8] 1,287 1,287  
Investment, Identifier [Axis]: Bamboo US Bidco, LLC | One stop 6      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[8] 573 573  
Investment, Identifier [Axis]: Banker's Toolbox, Inc. | One stop 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[8] 6,744 6,744  
Investment, Identifier [Axis]: Banker's Toolbox, Inc. | One stop 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[8],[10] (11) (11)  
Investment, Identifier [Axis]: Baxter Planning Systems, LLC | One stop 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6],[22]   12,035  
Fair value, beginning balance 11,790 [2],[8],[24] 11,790 [2],[8],[24] 12,035 [1],[6],[22]
Investment, Identifier [Axis]: Baxter Planning Systems, LLC | One stop 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6],[9]   0  
Fair value, beginning balance (109) [2],[8],[10] (109) [2],[8],[10] 0 [1],[6],[9]
Investment, Identifier [Axis]: Baxter Planning Systems, LLC | One stop 3      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6],[9]   0  
Fair value, beginning balance [1],[6],[9]     0
Investment, Identifier [Axis]: Bayou Intermediate II, LLC | One stop 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6],[9]   (48)  
Fair value, beginning balance 2,276 [2],[8] 2,276 [2],[8] (48) [1],[6],[9]
Investment, Identifier [Axis]: Bayou Intermediate II, LLC | One stop 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6]   32,382  
Fair value, beginning balance 32,413 [2],[8] 32,413 [2],[8] 32,382 [1],[6]
Investment, Identifier [Axis]: Bayou Intermediate II, LLC | One stop 3      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6],[9]   (89)  
Fair value, beginning balance 6,877 [2],[8] 6,877 [2],[8] (89) [1],[6],[9]
Investment, Identifier [Axis]: Beacon Roofing Supply, Inc. | Senior secured      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[4],[5],[6]   1,907  
Fair value, beginning balance [1],[4],[5],[6]     1,907
Investment, Identifier [Axis]: Belfor USA Group Inc. | Senior secured      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6]   9,713  
Fair value, beginning balance [1],[6]     9,713
Investment, Identifier [Axis]: Bellwether Buyer, LLC | One stop 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6]   2,488  
Fair value, beginning balance (43) [2],[8],[10] (43) [2],[8],[10] 2,488 [1],[6]
Investment, Identifier [Axis]: Bellwether Buyer, LLC | One stop 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6],[30]   47,769  
Fair value, beginning balance 47,564 [2],[8],[21] 47,564 [2],[8],[21] 47,769 [1],[6],[30]
Investment, Identifier [Axis]: Bellwether Buyer, LLC | One stop 3      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6],[9]   0  
Fair value, beginning balance 3,376 [2],[8] 3,376 [2],[8] 0 [1],[6],[9]
Investment, Identifier [Axis]: Belron Finance US, LLC | Senior secured      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[4],[5],[6]   5,006  
Fair value, beginning balance [1],[4],[5],[6]     5,006
Investment, Identifier [Axis]: Ben Nevis Midco Limited | One stop 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[4],[6],[25]   7,826  
Fair value, beginning balance 7,788 [2],[8],[15],[26] 7,788 [2],[8],[15],[26] 7,826 [1],[4],[6],[25]
Investment, Identifier [Axis]: Ben Nevis Midco Limited | One stop 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[4],[6],[25]   5,262  
Fair value, beginning balance 5,237 [2],[8],[15],[26] 5,237 [2],[8],[15],[26] 5,262 [1],[4],[6],[25]
Investment, Identifier [Axis]: Ben Nevis Midco Limited | One stop 3      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[4],[6],[25]   6,477  
Fair value, beginning balance 6,446 [2],[8],[15],[26] 6,446 [2],[8],[15],[26] 6,477 [1],[4],[6],[25]
Investment, Identifier [Axis]: Ben Nevis Midco Limited | One stop 4      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[4],[6],[25]   1,349  
Fair value, beginning balance 1,343 [2],[8],[15],[26] 1,343 [2],[8],[15],[26] 1,349 [1],[4],[6],[25]
Investment, Identifier [Axis]: Benefit Plan Administrators of Eau Claire, LLC | One stop 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6],[17],[30]   58,776  
Fair value, beginning balance 58,039 [2],[7],[8],[21] 58,039 [2],[7],[8],[21] 58,776 [1],[6],[17],[30]
Investment, Identifier [Axis]: Benefit Plan Administrators of Eau Claire, LLC | One stop 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6]   13,143  
Fair value, beginning balance 12,978 [2],[8] 12,978 [2],[8] 13,143 [1],[6]
Investment, Identifier [Axis]: Benefit Plan Administrators of Eau Claire, LLC | One stop 3      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6],[9]   0  
Fair value, beginning balance (11) [2],[8],[10] (11) [2],[8],[10] 0 [1],[6],[9]
Investment, Identifier [Axis]: Benefit Plan Administrators of Eau Claire, LLC | One stop 4      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6],[9]   0  
Fair value, beginning balance 3,075 [2],[8] 3,075 [2],[8] 0 [1],[6],[9]
Investment, Identifier [Axis]: Berlin Packaging, LLC | Senior secured      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[18],[20] 3,965 3,965  
Investment, Identifier [Axis]: BestPass, Inc. | One stop 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6],[17],[30]   36,234  
Fair value, beginning balance 35,241 [2],[7],[8],[21] 35,241 [2],[7],[8],[21] 36,234 [1],[6],[17],[30]
Investment, Identifier [Axis]: BestPass, Inc. | One stop 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6],[9]   0  
Fair value, beginning balance (72) [2],[8],[10] (72) [2],[8],[10] 0 [1],[6],[9]
Investment, Identifier [Axis]: BestPass, Inc. | One stop 3      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6],[9]   0  
Fair value, beginning balance 4,680 [2],[8] 4,680 [2],[8] 0 [1],[6],[9]
Investment, Identifier [Axis]: Biscuit Parent, LLC | One stop 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6],[30]   35,995  
Fair value, beginning balance 41,926 [2],[7],[8],[21] 41,926 [2],[7],[8],[21] 35,995 [1],[6],[30]
Investment, Identifier [Axis]: Biscuit Parent, LLC | One stop 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6],[9]   0  
Fair value, beginning balance 0 [2],[8],[10] 0 [2],[8],[10] 0 [1],[6],[9]
Investment, Identifier [Axis]: Biscuit Parent, LLC | One stop 3      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6]   261  
Fair value, beginning balance 0 [2],[8],[10] 0 [2],[8],[10] 261 [1],[6]
Investment, Identifier [Axis]: Blackbird Purchaser, Inc. | One stop 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6],[17]   17,950  
Fair value, beginning balance 19,972 [2],[7],[8],[21] 19,972 [2],[7],[8],[21] 17,950 [1],[6],[17]
Investment, Identifier [Axis]: Blackbird Purchaser, Inc. | One stop 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6]   2,108  
Fair value, beginning balance (9) [2],[8],[10] (9) [2],[8],[10] 2,108 [1],[6]
Investment, Identifier [Axis]: Blackbird Purchaser, Inc. | One stop 3      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6]   1,690  
Fair value, beginning balance 1,433 [2],[8] 1,433 [2],[8] 1,690 [1],[6]
Investment, Identifier [Axis]: Blades Buyer, Inc. | Senior secured 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[8],[10] (5) (5)  
Investment, Identifier [Axis]: Blades Buyer, Inc. | Senior secured 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[8] 5,026 5,026  
Investment, Identifier [Axis]: Blast Bidco Inc. | One stop 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[30]   15,054  
Fair value, beginning balance [1],[30]     15,054
Investment, Identifier [Axis]: Blast Bidco Inc. | One stop 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6],[9]   0  
Fair value, beginning balance [1],[6],[9]     0
Investment, Identifier [Axis]: Blast Bidco, Inc. | One stop 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[21] 14,939 14,939  
Investment, Identifier [Axis]: Blast Bidco, Inc. | One stop 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[8],[10] 0 0  
Investment, Identifier [Axis]: Bleriot US Bidco Inc. | Senior secured      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[4],[5],[6]   15,148  
Fair value, beginning balance [1],[4],[5],[6]     15,148
Investment, Identifier [Axis]: Bleriot US Bidco, Inc. | Senior secured      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[15],[18],[20] 2,987 2,987  
Investment, Identifier [Axis]: Blinqx B.V. | One stop 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[8],[10],[15],[29],[32] (5) (5)  
Investment, Identifier [Axis]: Blinqx B.V. | One stop 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[8],[15],[29],[32] 9,761 9,761  
Investment, Identifier [Axis]: Blinqx B.V. | One stop 3      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[8],[15],[29],[32] 10,658 10,658  
Investment, Identifier [Axis]: Bloomerang, LLC | One stop 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6],[22]   10,189  
Fair value, beginning balance 5,326 [2],[8],[24] 5,326 [2],[8],[24] 10,189 [1],[6],[22]
Investment, Identifier [Axis]: Bloomerang, LLC | One stop 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6],[22]   1,019  
Fair value, beginning balance (20) [2],[8],[10],[24] (20) [2],[8],[10],[24] 1,019 [1],[6],[22]
Investment, Identifier [Axis]: Bloomerang, LLC | One stop 3      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6]   1,140  
Fair value, beginning balance (23) [2],[8],[10] (23) [2],[8],[10] 1,140 [1],[6]
Investment, Identifier [Axis]: Bloomerang, LLC | One stop 4      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[8],[24] 11,364 11,364  
Investment, Identifier [Axis]: Blue Bidco Limited | One stop 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[4],[6],[25],[31]   13,167  
Fair value, beginning balance 12,622 [2],[8],[15],[26],[29] 12,622 [2],[8],[15],[26],[29] 13,167 [1],[4],[6],[25],[31]
Investment, Identifier [Axis]: Blue Bidco Limited | One stop 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[4],[6],[25],[31]   22,852  
Fair value, beginning balance 22,310 [2],[8],[15],[26],[29] 22,310 [2],[8],[15],[26],[29] 22,852 [1],[4],[6],[25],[31]
Investment, Identifier [Axis]: Blue Bidco Limited | One stop 3      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[4],[6],[25],[31]   0  
Fair value, beginning balance 939 [2],[8],[15],[26],[29] 939 [2],[8],[15],[26],[29] 0 [1],[4],[6],[25],[31]
Investment, Identifier [Axis]: Blue Bidco Limited | One stop 4      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[4],[6],[25]   3,300  
Fair value, beginning balance 3,250 [2],[8],[15],[26] 3,250 [2],[8],[15],[26] 3,300 [1],[4],[6],[25]
Investment, Identifier [Axis]: Blue Bidco Limited | One stop 5      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[4],[6],[25]   6,778  
Fair value, beginning balance 8,179 [2],[8],[15],[26] 8,179 [2],[8],[15],[26] 6,778 [1],[4],[6],[25]
Investment, Identifier [Axis]: Blue River Pet Care, LLC | One stop 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[17]   11,425  
Fair value, beginning balance 8,217 [2],[7] 8,217 [2],[7] 11,425 [1],[17]
Investment, Identifier [Axis]: Blue River Pet Care, LLC | One stop 10      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6]   1,384  
Fair value, beginning balance 1,368 [2],[8] 1,368 [2],[8] 1,384 [1],[6]
Investment, Identifier [Axis]: Blue River Pet Care, LLC | One stop 11      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6]   3,752  
Fair value, beginning balance 3,708 [2],[8] 3,708 [2],[8] 3,752 [1],[6]
Investment, Identifier [Axis]: Blue River Pet Care, LLC | One stop 12      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6]   1,414  
Fair value, beginning balance 1,397 [2],[8] 1,397 [2],[8] 1,414 [1],[6]
Investment, Identifier [Axis]: Blue River Pet Care, LLC | One stop 13      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[8] 3,005 3,005  
Investment, Identifier [Axis]: Blue River Pet Care, LLC | One stop 14      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[8] 5,092 5,092  
Investment, Identifier [Axis]: Blue River Pet Care, LLC | One stop 15      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[8] 1,833 1,833  
Investment, Identifier [Axis]: Blue River Pet Care, LLC | One stop 16      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[8] 2,164 2,164  
Investment, Identifier [Axis]: Blue River Pet Care, LLC | One stop 17      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[8] 4,150 4,150  
Investment, Identifier [Axis]: Blue River Pet Care, LLC | One stop 18      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[8] 1,024 1,024  
Investment, Identifier [Axis]: Blue River Pet Care, LLC | One stop 19      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[8] 1,327 1,327  
Investment, Identifier [Axis]: Blue River Pet Care, LLC | One stop 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6]   7,713  
Fair value, beginning balance 7,621 [2],[8] 7,621 [2],[8] 7,713 [1],[6]
Investment, Identifier [Axis]: Blue River Pet Care, LLC | One stop 3      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[17]   3,686  
Fair value, beginning balance 3,642 [2],[7] 3,642 [2],[7] 3,686 [1],[17]
Investment, Identifier [Axis]: Blue River Pet Care, LLC | One stop 4      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[30]   5,454  
Fair value, beginning balance 5,389 [2],[21] 5,389 [2],[21] 5,454 [1],[30]
Investment, Identifier [Axis]: Blue River Pet Care, LLC | One stop 5      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6]   5,541  
Fair value, beginning balance 5,476 [2],[7],[21] 5,476 [2],[7],[21] 5,541 [1],[6]
Investment, Identifier [Axis]: Blue River Pet Care, LLC | One stop 6      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6]   4,775  
Fair value, beginning balance 4,719 [2],[8] 4,719 [2],[8] 4,775 [1],[6]
Investment, Identifier [Axis]: Blue River Pet Care, LLC | One stop 7      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[30]   4,212  
Fair value, beginning balance 4,162 [2],[21] 4,162 [2],[21] 4,212 [1],[30]
Investment, Identifier [Axis]: Blue River Pet Care, LLC | One stop 8      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[30]   12,530  
Fair value, beginning balance 12,382 [2],[21] 12,382 [2],[21] 12,530 [1],[30]
Investment, Identifier [Axis]: Blue River Pet Care, LLC | One stop 9      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6],[9]   0  
Fair value, beginning balance (58) [2],[8],[10] (58) [2],[8],[10] 0 [1],[6],[9]
Investment, Identifier [Axis]: BlueMatrix Holdings, LLC | One stop 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6],[30]   23,855  
Fair value, beginning balance 23,319 [2],[7],[21] 23,319 [2],[7],[21] 23,855 [1],[6],[30]
Investment, Identifier [Axis]: BlueMatrix Holdings, LLC | One stop 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[17]   10,582  
Fair value, beginning balance 10,344 [2],[7] 10,344 [2],[7] 10,582 [1],[17]
Investment, Identifier [Axis]: BlueMatrix Holdings, LLC | One stop 3      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6]   700  
Fair value, beginning balance 2,748 [2],[8] 2,748 [2],[8] 700 [1],[6]
Investment, Identifier [Axis]: BlueMatrix Holdings, LLC | One stop 4      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6]   3,560  
Fair value, beginning balance 3,480 [2],[8] 3,480 [2],[8] 3,560 [1],[6]
Investment, Identifier [Axis]: BlueMatrix Holdings, LLC | One stop 5      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6]   5,184  
Fair value, beginning balance 5,068 [2],[21] 5,068 [2],[21] 5,184 [1],[6]
Investment, Identifier [Axis]: Bolt Purchaser, LLC | LP interest      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2] 85 85  
Investment, Identifier [Axis]: Bolt Purchaser, LLC | One stop 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[8] 453 453  
Investment, Identifier [Axis]: Bolt Purchaser, LLC | One stop 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[8] 0 0  
Investment, Identifier [Axis]: Bottomline Technologies, Inc. | One stop      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[17]   4,875  
Fair value, beginning balance 4,814 [2],[7] 4,814 [2],[7] 4,875 [1],[17]
Investment, Identifier [Axis]: BradyIFS Holdings, LLC | One stop 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6]   16,007  
Fair value, beginning balance [1],[6]     16,007
Investment, Identifier [Axis]: BradyIFS Holdings, LLC | One stop 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6]   155  
Fair value, beginning balance [1],[6]     155
Investment, Identifier [Axis]: BradyPLUS Holdings | Senior secured      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[19],[20] 6,910 6,910  
Investment, Identifier [Axis]: Bridge Growth Partners Seasmoke, LP | LP interest      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[15],[33] 14,751 14,751  
Investment, Identifier [Axis]: Brown Group Holding, LLC | Senior secured      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[15],[18],[20],[26] 3,003 3,003  
Investment, Identifier [Axis]: Brown Group Holding, LLC | Senior secured 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[3],[4],[5],[6],[25]   7,958  
Fair value, beginning balance [1],[3],[4],[5],[6],[25]     7,958
Investment, Identifier [Axis]: Brown Group Holding, LLC | Senior secured 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[4],[5],[6],[25]   1,799  
Fair value, beginning balance [1],[4],[5],[6],[25]     1,799
Investment, Identifier [Axis]: Bullhorn, Inc. | One stop 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[17]   3,959  
Fair value, beginning balance 3,860 [2],[7] 3,860 [2],[7] 3,959 [1],[17]
Investment, Identifier [Axis]: Bullhorn, Inc. | One stop 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[17]   3,959  
Fair value, beginning balance 3,860 [2],[7] 3,860 [2],[7] 3,959 [1],[17]
Investment, Identifier [Axis]: CAP-KSI Holdings, LLC | Common stock      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1]   296  
Fair value, beginning balance [1]     296
Investment, Identifier [Axis]: CAP-KSI Holdings, LLC | LP interest 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2] 959 959  
Investment, Identifier [Axis]: CAP-KSI Holdings, LLC | LP interest 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2] 0 0  
Investment, Identifier [Axis]: CAP-KSI Holdings, LLC | One stop 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6],[17]   34,759  
Fair value, beginning balance 34,049 [2],[7],[8] 34,049 [2],[7],[8] 34,759 [1],[6],[17]
Investment, Identifier [Axis]: CAP-KSI Holdings, LLC | One stop 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6]   1,408  
Fair value, beginning balance 3,053 [2],[8] 3,053 [2],[8] 1,408 [1],[6]
Investment, Identifier [Axis]: CAP-KSI Holdings, LLC | Preferred stock      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1]   1,274  
Fair value, beginning balance [1]     1,274
Investment, Identifier [Axis]: CB Buyer, Inc. | One stop 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6],[30]   37,391  
Fair value, beginning balance [1],[6],[30]     37,391
Investment, Identifier [Axis]: CB Buyer, Inc. | One stop 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6],[9]   0  
Fair value, beginning balance [1],[6],[9]     0
Investment, Identifier [Axis]: CB Buyer, Inc. | One stop 3      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6]   409  
Fair value, beginning balance [1],[6]     409
Investment, Identifier [Axis]: CB Buyer, Inc. | Preferred stock      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1]   285  
Fair value, beginning balance [1]     285
Investment, Identifier [Axis]: CB Sports Holdings Bidco, LLC | One stop 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[8],[10] (5) (5)  
Investment, Identifier [Axis]: CB Sports Holdings Bidco, LLC | One stop 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[8] 3,672 3,672  
Investment, Identifier [Axis]: CB Sports Holdings Bidco, LLC | One stop 3      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[8] 1 1  
Investment, Identifier [Axis]: CB Sports Holdings Bidco, LLC | One stop 4      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[8] 2,511 2,511  
Investment, Identifier [Axis]: CB Sports Holdings Bidco, LLC | One stop 5      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[8] 1,694 1,694  
Investment, Identifier [Axis]: CB Sports Holdings Bidco, LLC | One stop 6      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[8] 1,130 1,130  
Investment, Identifier [Axis]: CB Sports Holdings Bidco, LLC | One stop 7      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[8] 115 115  
Investment, Identifier [Axis]: CB Sports Holdings Bidco, LLC | One stop 8      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[8] 9 9  
Investment, Identifier [Axis]: CBAMR 2018-5, Ltd. | Structured Finance Note      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[4],[12],[27]   4,045  
Fair value, beginning balance 3,912 [2],[14],[15],[16] 3,912 [2],[14],[15],[16] 4,045 [1],[4],[12],[27]
Investment, Identifier [Axis]: CBAMR 2019-11R, Ltd. | Structured Finance Note      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[14],[15],[16],[20] 4,435 4,435  
Investment, Identifier [Axis]: CCSL Holdings, LLC | One stop 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[17],[30]   11,604  
Fair value, beginning balance 11,508 [2],[7],[21] 11,508 [2],[7],[21] 11,604 [1],[17],[30]
Investment, Identifier [Axis]: CCSL Holdings, LLC | One stop 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6],[31]   28,262  
Fair value, beginning balance 27,286 [2],[8],[29] 27,286 [2],[8],[29] 28,262 [1],[6],[31]
Investment, Identifier [Axis]: CCSL Holdings, LLC | One stop 3      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6],[31]   5,536  
Fair value, beginning balance 5,345 [2],[8],[29] 5,345 [2],[8],[29] 5,536 [1],[6],[31]
Investment, Identifier [Axis]: CCSL Holdings, LLC | One stop 4      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6]   6,822  
Fair value, beginning balance 6,768 [2],[8],[21] 6,768 [2],[8],[21] 6,822 [1],[6]
Investment, Identifier [Axis]: CCSL Holdings, LLC | One stop 5      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[30]   5,429  
Fair value, beginning balance 5,385 [2],[21] 5,385 [2],[21] 5,429 [1],[30]
Investment, Identifier [Axis]: CCSL Holdings, LLC | One stop 6      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[8] 3,412 3,412  
Investment, Identifier [Axis]: CE Intermediate I, LLC | Senior secured      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[3],[6]   12,690  
Fair value, beginning balance [1],[3],[6]     12,690
Investment, Identifier [Axis]: CG Group Holdings, LLC | LP interest      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2] 90 90  
Investment, Identifier [Axis]: CG Group Holdings, LLC | One stop 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[8] 429 429  
Investment, Identifier [Axis]: CG Group Holdings, LLC | One stop 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[8],[10] (1) (1)  
Investment, Identifier [Axis]: CHA Vision Holdings, Inc. | One stop 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6],[17]   18,102  
Fair value, beginning balance 17,975 [2],[7],[8] 17,975 [2],[7],[8] 18,102 [1],[6],[17]
Investment, Identifier [Axis]: CHA Vision Holdings, Inc. | One stop 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6]   5,893  
Fair value, beginning balance 5,852 [2],[8] 5,852 [2],[8] 5,893 [1],[6]
Investment, Identifier [Axis]: CHA Vision Holdings, Inc. | One stop 3      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6],[9]   (8)  
Fair value, beginning balance 145 [2],[8] 145 [2],[8] (8) [1],[6],[9]
Investment, Identifier [Axis]: CHA Vision Holdings, Inc. | One stop 4      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6]   2,763  
Fair value, beginning balance 2,744 [2],[8] 2,744 [2],[8] 2,763 [1],[6]
Investment, Identifier [Axis]: CHA Vision Holdings, Inc. | One stop 5      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6],[9]   (32)  
Fair value, beginning balance 762 [2],[8] 762 [2],[8] (32) [1],[6],[9]
Investment, Identifier [Axis]: CHVAC Services Investment, LLC | LLC interest      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2] 372 372  
Investment, Identifier [Axis]: CHVAC Services Investment, LLC | One stop 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[30]   1,941  
Fair value, beginning balance 1,903 [2],[21] 1,903 [2],[21] 1,941 [1],[30]
Investment, Identifier [Axis]: CHVAC Services Investment, LLC | One stop 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6]   505  
Fair value, beginning balance 495 [2],[8] 495 [2],[8] 505 [1],[6]
Investment, Identifier [Axis]: CHVAC Services Investment, LLC | One stop 3      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6],[9]   0  
Fair value, beginning balance 66 [2],[8] 66 [2],[8] 0 [1],[6],[9]
Investment, Identifier [Axis]: CHVAC Services Investment, LLC | One stop 4      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6]   252  
Fair value, beginning balance 2,233 [2],[8] 2,233 [2],[8] 252 [1],[6]
Investment, Identifier [Axis]: CHVAC Services Investment, LLC | Preferred stock      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1]   698  
Fair value, beginning balance [1]     698
Investment, Identifier [Axis]: CIFC Funding 2018-III, Ltd. | Structured Finance Note      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[4],[27]   3,512  
Fair value, beginning balance [1],[4],[27]     3,512
Investment, Identifier [Axis]: CIFC Funding 2019-II, Ltd. | Structured Finance Note      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[4],[27]   5,058  
Fair value, beginning balance 980 [2],[14],[15],[16],[20] 980 [2],[14],[15],[16],[20] 5,058 [1],[4],[27]
Investment, Identifier [Axis]: CIFC Funding 2019-V, Ltd. | Structured Finance Note      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[4],[27]   3,034  
Fair value, beginning balance 2,941 [2],[14],[15],[16],[20] 2,941 [2],[14],[15],[16],[20] 3,034 [1],[4],[27]
Investment, Identifier [Axis]: CIFC Funding 2020-III, Ltd. | Structured Finance Note      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[14],[15],[16] 4,968 4,968  
Investment, Identifier [Axis]: CIFC Funding 2021-III, Ltd. | Structured Finance Note      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[14],[15],[16] 2,981 2,981  
Investment, Identifier [Axis]: CIFC Funding 2025-IV, Ltd. | Structured Finance Note      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[4],[12],[27]   2,525  
Fair value, beginning balance 2,508 [2],[14],[15],[16] 2,508 [2],[14],[15],[16] 2,525 [1],[4],[12],[27]
Investment, Identifier [Axis]: CIFC Funding 2025-V, Ltd. | Structured Finance Note      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[4],[27]   5,048  
Fair value, beginning balance 5,017 [2],[14],[15],[16] 5,017 [2],[14],[15],[16] 5,048 [1],[4],[27]
Investment, Identifier [Axis]: CMI Parent Inc. | One stop 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[17],[30]   18,218  
Fair value, beginning balance (55) [2],[8],[10] (55) [2],[8],[10] 18,218 [1],[17],[30]
Investment, Identifier [Axis]: CMI Parent Inc. | One stop 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[17]   6,686  
Fair value, beginning balance 107,123 [2],[8] 107,123 [2],[8] 6,686 [1],[17]
Investment, Identifier [Axis]: CMI Parent Inc. | One stop 3      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[8],[10] (165) (165)  
Investment, Identifier [Axis]: CPM Holdings, Inc. | Senior secured      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[3],[5],[6]   6,978  
Fair value, beginning balance [1],[3],[5],[6]     6,978
Investment, Identifier [Axis]: CR Fitness Holdings, LLC | Senior secured 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[8] 1,155 1,155  
Investment, Identifier [Axis]: CR Fitness Holdings, LLC | Senior secured 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[8] 103,710 103,710  
Investment, Identifier [Axis]: CR Fitness Holdings, LLC | Senior secured 3      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[8],[10] 0 0  
Investment, Identifier [Axis]: CRC Insurance Group, LLC | Senior secured      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[15],[18],[19],[20] 8,415 8,415  
Investment, Identifier [Axis]: CVP Holdco, Inc. | One stop 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6]   32,806  
Fair value, beginning balance 32,431 [2],[7],[8] 32,431 [2],[7],[8] 32,806 [1],[6]
Investment, Identifier [Axis]: CVP Holdco, Inc. | One stop 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6],[9]   0  
Fair value, beginning balance (25) [2],[8],[10] (25) [2],[8],[10] 0 [1],[6],[9]
Investment, Identifier [Axis]: CVP Holdco, Inc. | One stop 3      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6]   1,881  
Fair value, beginning balance 4,892 [2],[8] 4,892 [2],[8] 1,881 [1],[6]
Investment, Identifier [Axis]: Caerus Midco 3 S.A.R.L. | One stop      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[7] 18,960 18,960  
Investment, Identifier [Axis]: Caerus Midco S.A.R.L. | One stop      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[4],[17]   19,497  
Fair value, beginning balance [1],[4],[17]     19,497
Investment, Identifier [Axis]: Camelia Bidco Limited | One stop 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[4],[6],[25],[31]   4,818  
Fair value, beginning balance 4,680 [2],[8],[15],[26],[29] 4,680 [2],[8],[15],[26],[29] 4,818 [1],[4],[6],[25],[31]
Investment, Identifier [Axis]: Camelia Bidco Limited | One stop 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[4],[6],[25],[31]   943  
Fair value, beginning balance 900 [2],[8],[15],[26],[29] 900 [2],[8],[15],[26],[29] 943 [1],[4],[6],[25],[31]
Investment, Identifier [Axis]: Camelia Bidco Limited | One stop 3      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[4],[6],[25],[31]   293  
Fair value, beginning balance 302 [2],[8],[15],[26],[29] 302 [2],[8],[15],[26],[29] 293 [1],[4],[6],[25],[31]
Investment, Identifier [Axis]: Camelia Bidco Limited | One stop 4      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[4],[6],[9],[25],[31]   0  
Fair value, beginning balance (41) [2],[8],[10],[15],[26],[29] (41) [2],[8],[10],[15],[26],[29] 0 [1],[4],[6],[9],[25],[31]
Investment, Identifier [Axis]: Capstone Borrower | Senior secured      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[3],[4],[5],[6]   12,593  
Fair value, beginning balance 15,746 [2],[8],[15],[18],[19],[20] 15,746 [2],[8],[15],[18],[19],[20] 12,593 [1],[3],[4],[5],[6]
Investment, Identifier [Axis]: Captive Resources Midco, LLC | One stop 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6],[30]   16,788  
Fair value, beginning balance 16,788 [2],[7],[21] 16,788 [2],[7],[21] 16,788 [1],[6],[30]
Investment, Identifier [Axis]: Captive Resources Midco, LLC | One stop 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6]   0  
Fair value, beginning balance 0 [2],[8] 0 [2],[8] 0 [1],[6]
Investment, Identifier [Axis]: Carlyle US CLO 2023-3, Ltd. | Structured Finance Note      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[4],[27]   5,000  
Fair value, beginning balance 4,889 [2],[14],[15],[16] 4,889 [2],[14],[15],[16] 5,000 [1],[4],[27]
Investment, Identifier [Axis]: Carlyle US CLO 2025-2, Ltd. | Structured Finance Note      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[4],[12],[27]   9,157  
Fair value, beginning balance [1],[4],[12],[27]     9,157
Investment, Identifier [Axis]: Cascade Acquiror, Inc. | One stop 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[8] 447 447  
Investment, Identifier [Axis]: Cascade Acquiror, Inc. | One stop 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[8] 0 0  
Investment, Identifier [Axis]: Cast & Crew Payroll, LLC | Senior secured      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[8],[20],[34] 945 945  
Investment, Identifier [Axis]: Cast Crew Payroll, LLC | Senior secured      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[5],[6]   4,928  
Fair value, beginning balance [1],[5],[6]     4,928
Investment, Identifier [Axis]: Cavender Stores L.P. | Senior secured      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[17],[30]   23,949  
Fair value, beginning balance 23,828 [2],[7],[21] 23,828 [2],[7],[21] 23,949 [1],[17],[30]
Investment, Identifier [Axis]: Centegix Intermediate II, LLC | LLC interest      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2] 4,068 4,068  
Investment, Identifier [Axis]: Centegix Intermediate II, LLC | One stop 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6]   49,253  
Fair value, beginning balance 56,809 [2],[8],[24] 56,809 [2],[8],[24] 49,253 [1],[6]
Investment, Identifier [Axis]: Centegix Intermediate II, LLC | One stop 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6],[9]   (44)  
Fair value, beginning balance 5,199 [2],[8] 5,199 [2],[8] (44) [1],[6],[9]
Investment, Identifier [Axis]: Centegix Intermediate II, LLC | One stop 3      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6],[9]   (73)  
Fair value, beginning balance 8,201 [2],[8],[24] 8,201 [2],[8],[24] (73) [1],[6],[9]
Investment, Identifier [Axis]: Centegix Intermediate II, LLC | One stop 4      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[8],[24] 85 85  
Investment, Identifier [Axis]: Centegix Intermediate II, LLC | One stop 5      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[8],[10] (2) (2)  
Investment, Identifier [Axis]: Centegix Intermediate II, LLC | Preferred stock      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1]   3,651  
Fair value, beginning balance [1]     3,651
Investment, Identifier [Axis]: Ceres Groupe SAS & Ceres PikCo | One stop 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[8],[15],[29],[35] 13,656 13,656  
Investment, Identifier [Axis]: Ceres Groupe SAS & Ceres PikCo | One stop 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[8],[15],[29],[35] 1,935 1,935  
Investment, Identifier [Axis]: Ceres Groupe SAS & Ceres PikCo | One stop 3      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[8],[10],[15],[29],[35] (29) (29)  
Investment, Identifier [Axis]: Ceres Groupe SAS & Ceres PikCo | One stop 4      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[8],[15],[29],[35] 19,283 19,283  
Investment, Identifier [Axis]: Ceres Groupe SAS & Ceres PikCo | Subordinated debt      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[8],[15],[24],[29],[35] 4,246 4,246  
Investment, Identifier [Axis]: Ceres Groupe SAS Ceres PikCo | One stop 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[4],[6],[31],[36]   14,246  
Fair value, beginning balance [1],[4],[6],[31],[36]     14,246
Investment, Identifier [Axis]: Ceres Groupe SAS Ceres PikCo | One stop 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[4],[6],[31],[36]   2,018  
Fair value, beginning balance [1],[4],[6],[31],[36]     2,018
Investment, Identifier [Axis]: Ceres Groupe SAS Ceres PikCo | One stop 3      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[4],[6],[31],[36]   0  
Fair value, beginning balance [1],[4],[6],[31],[36]     0
Investment, Identifier [Axis]: Ceres Groupe SAS Ceres PikCo | Subordinated debt      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[4],[6],[22],[31],[36]   4,333  
Fair value, beginning balance [1],[4],[6],[22],[31],[36]     4,333
Investment, Identifier [Axis]: Certara Holdco, Inc | Senior secured      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[8],[15],[18],[20] 10,858 10,858  
Investment, Identifier [Axis]: Certara Holdco, Inc. and Certara USA, Inc. | Senior secured      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[4],[6]   10,996  
Fair value, beginning balance [1],[4],[6]     10,996
Investment, Identifier [Axis]: Certus Pest, Inc. | One stop 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[30]   3,304  
Fair value, beginning balance 3,271 [2],[21] 3,271 [2],[21] 3,304 [1],[30]
Investment, Identifier [Axis]: Certus Pest, Inc. | One stop 10      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[30]   1,654  
Fair value, beginning balance 1,621 [2],[21] 1,621 [2],[21] 1,654 [1],[30]
Investment, Identifier [Axis]: Certus Pest, Inc. | One stop 11      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6]   792  
Fair value, beginning balance 779 [2],[8] 779 [2],[8] 792 [1],[6]
Investment, Identifier [Axis]: Certus Pest, Inc. | One stop 12      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6]   792  
Fair value, beginning balance 779 [2],[8] 779 [2],[8] 792 [1],[6]
Investment, Identifier [Axis]: Certus Pest, Inc. | One stop 13      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[8] 509 509  
Investment, Identifier [Axis]: Certus Pest, Inc. | One stop 14      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[7] 3,089 3,089  
Investment, Identifier [Axis]: Certus Pest, Inc. | One stop 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[17]   3,091  
Fair value, beginning balance 3,060 [2],[7] 3,060 [2],[7] 3,091 [1],[17]
Investment, Identifier [Axis]: Certus Pest, Inc. | One stop 3      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[17]   2,597  
Fair value, beginning balance 2,571 [2],[7] 2,571 [2],[7] 2,597 [1],[17]
Investment, Identifier [Axis]: Certus Pest, Inc. | One stop 4      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[17]   2,359  
Fair value, beginning balance 2,336 [2],[7] 2,336 [2],[7] 2,359 [1],[17]
Investment, Identifier [Axis]: Certus Pest, Inc. | One stop 5      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[17]   1,427  
Fair value, beginning balance 1,412 [2],[7] 1,412 [2],[7] 1,427 [1],[17]
Investment, Identifier [Axis]: Certus Pest, Inc. | One stop 6      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[17]   1,133  
Fair value, beginning balance 1,122 [2],[7] 1,122 [2],[7] 1,133 [1],[17]
Investment, Identifier [Axis]: Certus Pest, Inc. | One stop 7      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6]   448  
Fair value, beginning balance 438 [2],[8] 438 [2],[8] 448 [1],[6]
Investment, Identifier [Axis]: Certus Pest, Inc. | One stop 8      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6],[9]   0  
Fair value, beginning balance 927 [2],[8] 927 [2],[8] 0 [1],[6],[9]
Investment, Identifier [Axis]: Certus Pest, Inc. | One stop 9      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[30]   2,653  
Fair value, beginning balance 2,600 [2],[21] 2,600 [2],[21] 2,653 [1],[30]
Investment, Identifier [Axis]: Chariot Buyer, LLC | Senior secured      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[3],[5]   9,997  
Fair value, beginning balance 2,990 [2],[18],[20] 2,990 [2],[18],[20] 9,997 [1],[3],[5]
Investment, Identifier [Axis]: Chase Intermediate | One stop 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[17],[30]   14,572  
Fair value, beginning balance 14,170 [2],[7],[21] 14,170 [2],[7],[21] 14,572 [1],[17],[30]
Investment, Identifier [Axis]: Chase Intermediate | One stop 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6]   3,440  
Fair value, beginning balance 9,568 [2],[8] 9,568 [2],[8] 3,440 [1],[6]
Investment, Identifier [Axis]: Citrin Cooperman Advisors LLC | Senior secured 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[3],[5],[6]   14,027  
Fair value, beginning balance [1],[3],[5],[6]     14,027
Investment, Identifier [Axis]: Citrin Cooperman Advisors LLC | Senior secured 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[3],[5],[6],[9]   (3)  
Fair value, beginning balance [1],[3],[5],[6],[9]     (3)
Investment, Identifier [Axis]: Citrin Cooperman Advisors, LLC | Senior secured 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[8],[18],[19],[20] 15,648 15,648  
Investment, Identifier [Axis]: Citrin Cooperman Advisors, LLC | Senior secured 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[10],[19] (35) (35)  
Investment, Identifier [Axis]: CivicPlus, LLC | One stop 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[8],[10] (16) (16)  
Investment, Identifier [Axis]: CivicPlus, LLC | One stop 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[8],[10] (131) (131)  
Investment, Identifier [Axis]: Claroty, Ltd. | Preferred stock      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[15],[37] 12,562 12,562  
Investment, Identifier [Axis]: Clearwater Analytics Holdings, Inc. | LP interest      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2] 85 85  
Investment, Identifier [Axis]: Clearwater Analytics Holdings, Inc. | One stop 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[8] 381 381  
Investment, Identifier [Axis]: Clearwater Analytics Holdings, Inc. | One stop 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[8] 0 0  
Investment, Identifier [Axis]: Clearwater Analytics Holdings, Inc. | One stop 3      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[8] 0 0  
Investment, Identifier [Axis]: Cloud Software Group | Senior secured 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[3],[4],[5]   14,150  
Fair value, beginning balance 12,145 [2],[15],[18],[19],[20] 12,145 [2],[15],[18],[19],[20] 14,150 [1],[3],[4],[5]
Investment, Identifier [Axis]: Cloud Software Group | Senior secured 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[3],[4],[5]   1,005  
Fair value, beginning balance 3,494 [2],[15],[19],[20] 3,494 [2],[15],[19],[20] 1,005 [1],[3],[4],[5]
Investment, Identifier [Axis]: Collision SP Subco, LLC | One stop 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[17],[30]   16,034  
Fair value, beginning balance 15,912 [2],[7],[21] 15,912 [2],[7],[21] 16,034 [1],[17],[30]
Investment, Identifier [Axis]: Collision SP Subco, LLC | One stop 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6]   8,556  
Fair value, beginning balance 9,288 [2],[21] 9,288 [2],[21] 8,556 [1],[6]
Investment, Identifier [Axis]: Collision SP Subco, LLC | One stop 3      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6]   381  
Fair value, beginning balance 0 [2],[8],[10] 0 [2],[8],[10] 381 [1],[6]
Investment, Identifier [Axis]: Collision SP Subco, LLC | One stop 4      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[30]   1,213  
Fair value, beginning balance 1,204 [2],[21] 1,204 [2],[21] 1,213 [1],[30]
Investment, Identifier [Axis]: Collision SP Subco, LLC | One stop 5      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6],[9]   0  
Fair value, beginning balance 3,050 [2],[8] 3,050 [2],[8] 0 [1],[6],[9]
Investment, Identifier [Axis]: Confluent Medical Technologies, Inc. | Senior secured      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6]   6,437  
Fair value, beginning balance 2,503 [2],[18],[20] 2,503 [2],[18],[20] 6,437 [1],[6]
Investment, Identifier [Axis]: ConnectWise, LLC | Senior secured      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[3],[5],[6]   28,631  
Fair value, beginning balance 26,155 [2],[8],[18],[20] 26,155 [2],[8],[18],[20] 28,631 [1],[3],[5],[6]
Investment, Identifier [Axis]: Conservice Midco, LLC | Senior secured      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[3],[5],[6]   16,043  
Fair value, beginning balance [1],[3],[5],[6]     16,043
Investment, Identifier [Axis]: Consilio Midco Limited | Senior secured 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[4],[6],[25],[31]   38,032  
Fair value, beginning balance 36,088 [2],[8],[15],[26],[29] 36,088 [2],[8],[15],[26],[29] 38,032 [1],[4],[6],[25],[31]
Investment, Identifier [Axis]: Consilio Midco Limited | Senior secured 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[4],[6],[25]   30,962  
Fair value, beginning balance 30,188 [2],[8],[15],[26] 30,188 [2],[8],[15],[26] 30,962 [1],[4],[6],[25]
Investment, Identifier [Axis]: Consilio Midco Limited | Senior secured 3      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[4],[6],[25]   19,084  
Fair value, beginning balance 18,607 [2],[8],[15],[26] 18,607 [2],[8],[15],[26] 19,084 [1],[4],[6],[25]
Investment, Identifier [Axis]: Consilio Midco Limited | Senior secured 4      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[4],[6],[25]   0  
Fair value, beginning balance 1,170 [2],[8],[15],[26] 1,170 [2],[8],[15],[26] 0 [1],[4],[6],[25]
Investment, Identifier [Axis]: Consilio Midco Limited | Senior secured 5      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[4],[6],[25]   0  
Fair value, beginning balance (180) [2],[8],[10],[15],[26] (180) [2],[8],[10],[15],[26] 0 [1],[4],[6],[25]
Investment, Identifier [Axis]: Consilio Midco Limited | Subordinated debt 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[4],[6],[22],[25],[31]   4,253  
Fair value, beginning balance 4,440 [2],[8],[15],[24],[26],[29] 4,440 [2],[8],[15],[24],[26],[29] 4,253 [1],[4],[6],[22],[25],[31]
Investment, Identifier [Axis]: Consilio Midco Limited | Subordinated debt 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[4],[6],[22],[25]   5,314  
Fair value, beginning balance 5,800 [2],[8],[15],[24],[26] 5,800 [2],[8],[15],[24],[26] 5,314 [1],[4],[6],[22],[25]
Investment, Identifier [Axis]: Consilio Midco Limited | Subordinated debt 3      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[4],[6],[22],[25]   3  
Fair value, beginning balance (48) [2],[8],[10],[15],[24],[26] (48) [2],[8],[10],[15],[24],[26] 3 [1],[4],[6],[22],[25]
Investment, Identifier [Axis]: Consor Intermediate II, LLC | One stop 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6],[17]   1,645  
Fair value, beginning balance 1,671 [2],[7],[8] 1,671 [2],[7],[8] 1,645 [1],[6],[17]
Investment, Identifier [Axis]: Consor Intermediate II, LLC | One stop 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6],[9]   0  
Fair value, beginning balance (5) [2],[8],[10] (5) [2],[8],[10] 0 [1],[6],[9]
Investment, Identifier [Axis]: Consor Intermediate II, LLC | One stop 3      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6],[9]   0  
Fair value, beginning balance 71 [2],[8] 71 [2],[8] 0 [1],[6],[9]
Investment, Identifier [Axis]: ContractPod Technologies, Ltd. | One stop 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[4],[6],[22],[25]   3,428  
Fair value, beginning balance 3,443 [2],[8],[15],[24],[26] 3,443 [2],[8],[15],[24],[26] 3,428 [1],[4],[6],[22],[25]
Investment, Identifier [Axis]: ContractPod Technologies, Ltd. | One stop 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[4],[6],[9],[25]   0  
Fair value, beginning balance 1,689 [2],[8],[15],[24],[26] 1,689 [2],[8],[15],[24],[26] 0 [1],[4],[6],[9],[25]
Investment, Identifier [Axis]: ContractPod Technologies, Ltd. | One stop 3      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[4],[6],[9],[25]   0  
Fair value, beginning balance 221 [2],[8],[15],[24],[26] 221 [2],[8],[15],[24],[26] 0 [1],[4],[6],[9],[25]
Investment, Identifier [Axis]: Corelogic, Inc. | Senior secured      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[3],[4],[5],[6]   16,925  
Fair value, beginning balance 13,633 [2],[8],[15],[18],[20] 13,633 [2],[8],[15],[18],[20] 16,925 [1],[3],[4],[5],[6]
Investment, Identifier [Axis]: Cornerstone OnDemand, Inc. | Senior secured      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[5],[6]   9,089  
Fair value, beginning balance 5,990 [2],[8],[18],[20] 5,990 [2],[8],[18],[20] 9,089 [1],[5],[6]
Investment, Identifier [Axis]: Corsair Blade IV S.A R.L. | One stop 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[4],[6],[22],[38]   4,417  
Fair value, beginning balance 4,418 [2],[8],[15],[24],[39] 4,418 [2],[8],[15],[24],[39] 4,417 [1],[4],[6],[22],[38]
Investment, Identifier [Axis]: Corsair Blade IV S.A R.L. | One stop 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[4],[6],[22],[31],[38]   1,422  
Fair value, beginning balance 719 [2],[8],[15],[24],[29],[39] 719 [2],[8],[15],[24],[29],[39] 1,422 [1],[4],[6],[22],[31],[38]
Investment, Identifier [Axis]: Cotiviti | Senior secured 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[5],[6]   12,130  
Fair value, beginning balance 11,219 [2],[8],[18],[20] 11,219 [2],[8],[18],[20] 12,130 [1],[5],[6]
Investment, Identifier [Axis]: Cotiviti | Senior secured 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[3],[5]   7,850  
Fair value, beginning balance 7,210 [2],[19],[20] 7,210 [2],[19],[20] 7,850 [1],[3],[5]
Investment, Identifier [Axis]: Creek Parent, Inc. | One stop 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6]   79,597  
Fair value, beginning balance 77,828 [2],[7],[8] 77,828 [2],[7],[8] 79,597 [1],[6]
Investment, Identifier [Axis]: Creek Parent, Inc. | One stop 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6],[9]   0  
Fair value, beginning balance (170) [2],[8],[10] (170) [2],[8],[10] 0 [1],[6],[9]
Investment, Identifier [Axis]: Crewline Buyer, Inc. | One stop 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6]   28,617  
Fair value, beginning balance 28,044 [2],[8] 28,044 [2],[8] 28,617 [1],[6]
Investment, Identifier [Axis]: Crewline Buyer, Inc. | One stop 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6],[9]   0  
Fair value, beginning balance (51) [2],[8],[10] (51) [2],[8],[10] 0 [1],[6],[9]
Investment, Identifier [Axis]: Crumbl Enterprises, LLC | One stop 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6],[30]   115,489  
Fair value, beginning balance 114,621 [2],[8],[21] 114,621 [2],[8],[21] 115,489 [1],[6],[30]
Investment, Identifier [Axis]: Crumbl Enterprises, LLC | One stop 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6]   1,505  
Fair value, beginning balance 0 [2],[8],[10] 0 [2],[8],[10] 1,505 [1],[6]
Investment, Identifier [Axis]: Crunch Holdings, LLC | One stop 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[17],[30]   17,647  
Fair value, beginning balance 17,515 [2],[7],[21] 17,515 [2],[7],[21] 17,647 [1],[17],[30]
Investment, Identifier [Axis]: Crunch Holdings, LLC | One stop 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6],[9]   0  
Fair value, beginning balance 0 [2],[8],[10] 0 [2],[8],[10] 0 [1],[6],[9]
Investment, Identifier [Axis]: Cyberswift | Senior secured      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[3],[4],[40]   7,004  
Fair value, beginning balance 6,974 [2],[15],[18],[19],[32] 6,974 [2],[15],[18],[19],[32] 7,004 [1],[3],[4],[40]
Investment, Identifier [Axis]: Cycle Gear, Inc. | LLC interest      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2] 32 32  
Investment, Identifier [Axis]: Cycle Gear, Inc. | Warrant      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2] 6 6  
Investment, Identifier [Axis]: DCCM, LLC | One stop 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[30]   4,030  
Fair value, beginning balance 4,000 [2],[21] 4,000 [2],[21] 4,030 [1],[30]
Investment, Identifier [Axis]: DCCM, LLC | One stop 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6],[9]   0  
Fair value, beginning balance 0 [2],[8],[10] 0 [2],[8],[10] 0 [1],[6],[9]
Investment, Identifier [Axis]: DCCM, LLC | One stop 3      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6],[9]   0  
Fair value, beginning balance 59 [2],[8] 59 [2],[8] 0 [1],[6],[9]
Investment, Identifier [Axis]: DISA Holdings Corp. | Senior secured      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[8] 236 236  
Investment, Identifier [Axis]: Datix Bidco Limited and RL Datix Holdings, Inc. | One stop 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[4],[6],[25]   23,296  
Fair value, beginning balance 22,947 [2],[8],[15],[26] 22,947 [2],[8],[15],[26] 23,296 [1],[4],[6],[25]
Investment, Identifier [Axis]: Datix Bidco Limited and RL Datix Holdings, Inc. | One stop 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[4],[6],[25],[31]   14,506  
Fair value, beginning balance 14,090 [2],[8],[15],[26],[29] 14,090 [2],[8],[15],[26],[29] 14,506 [1],[4],[6],[25],[31]
Investment, Identifier [Axis]: Datix Bidco Limited and RL Datix Holdings, Inc. | One stop 3      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[4],[6],[9],[25]   0  
Fair value, beginning balance (79) [2],[8],[10],[15],[26] (79) [2],[8],[10],[15],[26] 0 [1],[4],[6],[9],[25]
Investment, Identifier [Axis]: Datix Bidco Limited and RL Datix Holdings, Inc. | One stop 4      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[4],[6],[9],[25]   0  
Fair value, beginning balance (69) [2],[8],[10],[15],[26] (69) [2],[8],[10],[15],[26] 0 [1],[4],[6],[9],[25]
Investment, Identifier [Axis]: Davis Park CLO, Ltd. | Structured Finance Note      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[4],[11],[12]   5,031  
Fair value, beginning balance 4,843 [2],[13],[14],[15] 4,843 [2],[13],[14],[15] 5,031 [1],[4],[11],[12]
Investment, Identifier [Axis]: Dawn Bidco, LLC | Senior secured      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[19],[20] 11,434 11,434  
Investment, Identifier [Axis]: Daxko Acquisition Corporation | One stop 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[17]   11,574  
Fair value, beginning balance 11,852 [2],[7],[8] 11,852 [2],[7],[8] 11,574 [1],[17]
Investment, Identifier [Axis]: Daxko Acquisition Corporation | One stop 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6]   472  
Fair value, beginning balance 5,364 [2],[8] 5,364 [2],[8] 472 [1],[6]
Investment, Identifier [Axis]: Daxko Acquisition Corporation | One stop 3      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6],[9]   0  
Fair value, beginning balance (12) [2],[8],[10] (12) [2],[8],[10] 0 [1],[6],[9]
Investment, Identifier [Axis]: Daxko Acquisition Corporation | One stop 4      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[8] 36 36  
Investment, Identifier [Axis]: Daxko Acquisition Corporation | One stop 5      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[8] 2 2  
Investment, Identifier [Axis]: Deerfield Dakota Holding, LLC | One stop 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6],[9]   (82)  
Fair value, beginning balance 2,929 [2],[8] 2,929 [2],[8] (82) [1],[6],[9]
Investment, Identifier [Axis]: Deerfield Dakota Holding, LLC | One stop 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6],[22]   86,465  
Fair value, beginning balance 87,837 [2],[8],[24] 87,837 [2],[8],[24] 86,465 [1],[6],[22]
Investment, Identifier [Axis]: Delinea Inc. | One stop 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6],[30]   32,672  
Fair value, beginning balance 91,228 [2],[7],[8],[21] 91,228 [2],[7],[8],[21] 32,672 [1],[6],[30]
Investment, Identifier [Axis]: Delinea Inc. | One stop 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[17]   8,770  
Fair value, beginning balance (89) [2],[8],[10] (89) [2],[8],[10] 8,770 [1],[17]
Investment, Identifier [Axis]: Delinea Inc. | One stop 3      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[17]   4,795  
Fair value, beginning balance [1],[17]     4,795
Investment, Identifier [Axis]: Denali Bidco Limited | LP interest      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[15],[26] 161 161  
Investment, Identifier [Axis]: Denali Bidco Limited | LP units      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[4],[25]   128  
Fair value, beginning balance [1],[4],[25]     128
Investment, Identifier [Axis]: Denali Bidco Limited | One stop 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[4],[6],[25],[31]   28,778  
Fair value, beginning balance 28,236 [2],[8],[15],[26],[29] 28,236 [2],[8],[15],[26],[29] 28,778 [1],[4],[6],[25],[31]
Investment, Identifier [Axis]: Denali Bidco Limited | One stop 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[4],[6],[25],[31]   55,950  
Fair value, beginning balance 54,178 [2],[8],[15],[26],[29] 54,178 [2],[8],[15],[26],[29] 55,950 [1],[4],[6],[25],[31]
Investment, Identifier [Axis]: Denali Bidco Limited | One stop 3      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[4],[6],[9],[25],[31]   (21)  
Fair value, beginning balance (42) [2],[8],[10],[15],[26],[29] (42) [2],[8],[10],[15],[26],[29] (21) [1],[4],[6],[9],[25],[31]
Investment, Identifier [Axis]: Denali Bidco Limited | Subordinated debt 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[4],[6],[22],[25],[31]   26,296  
Fair value, beginning balance 27,584 [2],[8],[15],[24],[26],[29] 27,584 [2],[8],[15],[24],[26],[29] 26,296 [1],[4],[6],[22],[25],[31]
Investment, Identifier [Axis]: Denali Bidco Limited | Subordinated debt 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[4],[6],[22],[25],[31]   17,344  
Fair value, beginning balance 18,739 [2],[8],[15],[24],[26],[29] 18,739 [2],[8],[15],[24],[26],[29] 17,344 [1],[4],[6],[22],[25],[31]
Investment, Identifier [Axis]: Denali Intermediate Holdings, Inc. | One stop 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6],[9]   (146)  
Fair value, beginning balance 2,505 [2],[8] 2,505 [2],[8] (146) [1],[6],[9]
Investment, Identifier [Axis]: Denali Intermediate Holdings, Inc. | One stop 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6]   144,990  
Fair value, beginning balance 144,414 [2],[8] 144,414 [2],[8] 144,990 [1],[6]
Investment, Identifier [Axis]: Denali Midco , LLC | One stop      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[17],[30]   16,886  
Fair value, beginning balance [1],[17],[30]     16,886
Investment, Identifier [Axis]: Denali Midco , LLC | Second lien      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6],[22]   25,829  
Fair value, beginning balance [1],[6],[22]     25,829
Investment, Identifier [Axis]: Denali Midco 2, LLC | One stop      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[7],[21] 16,886 16,886  
Investment, Identifier [Axis]: Denali Midco 2, LLC | Second lien      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[8],[24] 28,205 28,205  
Investment, Identifier [Axis]: Diamondback Acquisition, Inc. | One stop 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6]   33,709  
Fair value, beginning balance 32,448 [2],[8] 32,448 [2],[8] 33,709 [1],[6]
Investment, Identifier [Axis]: Diamondback Acquisition, Inc. | One stop 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6],[9]   (34)  
Fair value, beginning balance (241) [2],[8],[10] (241) [2],[8],[10] (34) [1],[6],[9]
Investment, Identifier [Axis]: Diamondback Acquisition, Inc. | One stop 3      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6]   863  
Fair value, beginning balance 1,357 [2],[8] 1,357 [2],[8] 863 [1],[6]
Investment, Identifier [Axis]: Disco Parent | Senior secured      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[3]   6,784  
Fair value, beginning balance 14,851 [2],[18],[19],[20] 14,851 [2],[18],[19],[20] 6,784 [1],[3]
Investment, Identifier [Axis]: Dispatch Acquisition Holdings, LLC | One stop 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[8],[21] 122,918 122,918  
Investment, Identifier [Axis]: Dispatch Acquisition Holdings, LLC | One stop 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[8] 8,732 8,732  
Investment, Identifier [Axis]: Dispatch Acquisition Holdings, LLC | One stop 3      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[8],[10] (21) (21)  
Investment, Identifier [Axis]: Doxa Insurance Holdings LLC | One stop 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6]   10,621  
Fair value, beginning balance 12,230 [2],[7],[8] 12,230 [2],[7],[8] 10,621 [1],[6]
Investment, Identifier [Axis]: Doxa Insurance Holdings LLC | One stop 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6]   10,005  
Fair value, beginning balance 11,632 [2],[8] 11,632 [2],[8] 10,005 [1],[6]
Investment, Identifier [Axis]: Doxa Insurance Holdings LLC | One stop 3      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6]   278  
Fair value, beginning balance 722 [2],[8] 722 [2],[8] 278 [1],[6]
Investment, Identifier [Axis]: Doxa Insurance Holdings LLC | One stop 4      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6],[9]   0  
Fair value, beginning balance 22,166 [2],[8] 22,166 [2],[8] 0 [1],[6],[9]
Investment, Identifier [Axis]: Doxa Insurance Holdings LLC | One stop 5      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[8],[10] (100) (100)  
Investment, Identifier [Axis]: Doxa Insurance Holdings LLC | One stop 6      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[8],[10] (4) (4)  
Investment, Identifier [Axis]: Dryden 40 Senior Loan Fund | Structured Finance Note      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[4],[12],[27]   5,528  
Fair value, beginning balance [1],[4],[12],[27]     5,528
Investment, Identifier [Axis]: EAB Global, Inc. | Senior secured      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[3],[5]   13,184  
Fair value, beginning balance 12,105 [2],[18],[19],[20] 12,105 [2],[18],[19],[20] 13,184 [1],[3],[5]
Investment, Identifier [Axis]: ECI Macola/Max Holding, LLC | Senior secured      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[3],[5],[6]   23,357  
Fair value, beginning balance 22,071 [2],[8],[15],[18],[19],[20] 22,071 [2],[8],[15],[18],[19],[20] 23,357 [1],[3],[5],[6]
Investment, Identifier [Axis]: EP Purchaser, LLC | Senior secured      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[5],[6]   4,627  
Fair value, beginning balance 3,166 [2],[8] 3,166 [2],[8] 4,627 [1],[5],[6]
Investment, Identifier [Axis]: ESO Solution, Inc. | One stop      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6]   5,250  
Fair value, beginning balance 5,224 [2],[8] 5,224 [2],[8] 5,250 [1],[6]
Investment, Identifier [Axis]: Eagle Family Foods Group, LLC | One stop 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6]   10,577  
Fair value, beginning balance 9,777 [2],[7] 9,777 [2],[7] 10,577 [1],[6]
Investment, Identifier [Axis]: Eagle Family Foods Group, LLC | One stop 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6],[9]   0  
Fair value, beginning balance 0 [2],[8],[10] 0 [2],[8],[10] 0 [1],[6],[9]
Investment, Identifier [Axis]: Eagle Parent Corp. | Senior secured      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[3],[5],[6]   10,772  
Fair value, beginning balance 8,734 [2],[8],[18],[19],[20] 8,734 [2],[8],[18],[19],[20] 10,772 [1],[3],[5],[6]
Investment, Identifier [Axis]: EagleView Technology Corporation | Senior secured      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[3],[5],[22]   10,692  
Fair value, beginning balance 10,458 [2],[18],[19],[20],[24] 10,458 [2],[18],[19],[20],[24] 10,692 [1],[3],[5],[22]
Investment, Identifier [Axis]: East Range Partners Intermediate 2, LLC | One stop 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[8] 200 200  
Investment, Identifier [Axis]: East Range Partners Intermediate 2, LLC | One stop 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[8] 18 18  
Investment, Identifier [Axis]: East Range Partners Intermediate 2, LLC | One stop 3      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[8] 8 8  
Investment, Identifier [Axis]: East Range Partners Intermediate 2, LLC | One stop 4      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[8],[10] (1) (1)  
Investment, Identifier [Axis]: Eaton Vance CLO 2013-1, Ltd. | Structured Finance Note      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[4],[12],[27]   5,057  
Fair value, beginning balance 4,888 [2],[14],[15],[16] 4,888 [2],[14],[15],[16] 5,057 [1],[4],[12],[27]
Investment, Identifier [Axis]: Eclipse Buyer, Inc. | One stop 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6]   12,644  
Fair value, beginning balance 12,391 [2],[7],[8] 12,391 [2],[7],[8] 12,644 [1],[6]
Investment, Identifier [Axis]: Eclipse Buyer, Inc. | One stop 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6],[9]   0  
Fair value, beginning balance (32) [2],[8],[10] (32) [2],[8],[10] 0 [1],[6],[9]
Investment, Identifier [Axis]: Eclipse Buyer, Inc. | One stop 3      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6],[9]   0  
Fair value, beginning balance (43) [2],[8],[10] (43) [2],[8],[10] 0 [1],[6],[9]
Investment, Identifier [Axis]: Edelman Financial Center, LLC | Senior secured      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[3],[5],[6]   22,805  
Fair value, beginning balance 15,234 [2],[8],[18],[19],[20] 15,234 [2],[8],[18],[19],[20] 22,805 [1],[3],[5],[6]
Investment, Identifier [Axis]: Edition Holdings, Inc. | One stop 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[8] 8,025 8,025  
Investment, Identifier [Axis]: Edition Holdings, Inc. | One stop 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[8] 21 21  
Investment, Identifier [Axis]: Edition Holdings, Inc. | One stop 3      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[8],[10] (8) (8)  
Investment, Identifier [Axis]: Einstein Parent, Inc. | One stop 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6]   40,574  
Fair value, beginning balance 39,965 [2],[8] 39,965 [2],[8] 40,574 [1],[6]
Investment, Identifier [Axis]: Einstein Parent, Inc. | One stop 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6],[9]   0  
Fair value, beginning balance (63) [2],[8],[10] (63) [2],[8],[10] 0 [1],[6],[9]
Investment, Identifier [Axis]: Eisner Advisory Group LLC | Senior secured      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[3],[5]   4,521  
Fair value, beginning balance [1],[3],[5]     4,521
Investment, Identifier [Axis]: Eisner Advisory Group, LLC | Senior secured      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[18],[19],[20] 4,385 4,385  
Investment, Identifier [Axis]: Electron BidCo, Inc. | Senior secured      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[3],[5],[6]   11,555  
Fair value, beginning balance 4,009 [2],[18],[20] 4,009 [2],[18],[20] 11,555 [1],[3],[5],[6]
Investment, Identifier [Axis]: Element Materials Technology | Senior secured      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[4],[5],[6]   18,536  
Fair value, beginning balance 13,952 [2],[8],[15],[18],[19],[20] 13,952 [2],[8],[15],[18],[19],[20] 18,536 [1],[4],[5],[6]
Investment, Identifier [Axis]: Eliassen Group, LLC | One stop      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[17]   4,710  
Fair value, beginning balance 4,618 [2],[7] 4,618 [2],[7] 4,710 [1],[17]
Investment, Identifier [Axis]: Elmwood CLO 19, Ltd. | Structured Finance Note      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[4],[27]   2,000  
Fair value, beginning balance 2,003 [2],[14],[15],[16] 2,003 [2],[14],[15],[16] 2,000 [1],[4],[27]
Investment, Identifier [Axis]: Empyrean Solutions, LLC | One stop 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6]   9,959  
Fair value, beginning balance 9,710 [2],[21] 9,710 [2],[21] 9,959 [1],[6]
Investment, Identifier [Axis]: Empyrean Solutions, LLC | One stop 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6],[9]   0  
Fair value, beginning balance (37) [2],[8],[10] (37) [2],[8],[10] 0 [1],[6],[9]
Investment, Identifier [Axis]: Empyrean Solutions, LLC | One stop 3      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6],[9]   0  
Fair value, beginning balance (100) [2],[8],[10] (100) [2],[8],[10] 0 [1],[6],[9]
Investment, Identifier [Axis]: Energize Holdco, LLC | Senior secured      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[3],[5],[6]   12,961  
Fair value, beginning balance [1],[3],[5],[6]     12,961
Investment, Identifier [Axis]: Energy Worldnet, LLC | LLC interest      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[41] 55 55  
Investment, Identifier [Axis]: Energy Worldnet, LLC | Preferred stock      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[42]   54  
Fair value, beginning balance [1],[42]     54
Investment, Identifier [Axis]: Entomo Brands Acquisitions, Inc. | One stop      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[8],[10] (1) (1)  
Investment, Identifier [Axis]: Entomo Brands Acquisitions, Inc. | Senior secured 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6]   764  
Fair value, beginning balance 962 [2],[8] 962 [2],[8] 764 [1],[6]
Investment, Identifier [Axis]: Entomo Brands Acquisitions, Inc. | Senior secured 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6]   222  
Fair value, beginning balance 219 [2],[8] 219 [2],[8] 222 [1],[6]
Investment, Identifier [Axis]: Entomo Brands Acquisitions, Inc. | Senior secured 3      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6]   7  
Fair value, beginning balance 0 [2],[8] 0 [2],[8] 7 [1],[6]
Investment, Identifier [Axis]: Envernus, Inc. | One stop 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6],[30]   19,152  
Fair value, beginning balance [1],[6],[30]     19,152
Investment, Identifier [Axis]: Envernus, Inc. | One stop 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6]   42  
Fair value, beginning balance [1],[6]     42
Investment, Identifier [Axis]: Envernus, Inc. | One stop 3      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6],[9]   0  
Fair value, beginning balance [1],[6],[9]     0
Investment, Identifier [Axis]: Epicor Software Corporation | Senior secured      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[3],[5]   6,042  
Fair value, beginning balance 5,731 [2],[18],[19],[20] 5,731 [2],[18],[19],[20] 6,042 [1],[3],[5]
Investment, Identifier [Axis]: Equity Methods, LLC | One stop 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6],[30]   48,893  
Fair value, beginning balance 48,200 [2],[8],[21] 48,200 [2],[8],[21] 48,893 [1],[6],[30]
Investment, Identifier [Axis]: Equity Methods, LLC | One stop 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6],[9]   0  
Fair value, beginning balance (126) [2],[8],[10] (126) [2],[8],[10] 0 [1],[6],[9]
Investment, Identifier [Axis]: Equity Methods, LLC | One stop 3      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6],[9]   0  
Fair value, beginning balance (157) [2],[8],[10] (157) [2],[8],[10] 0 [1],[6],[9]
Investment, Identifier [Axis]: Espresso Bidco, Inc. | One stop 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6],[22]   36,521  
Fair value, beginning balance 36,646 [2],[8],[24] 36,646 [2],[8],[24] 36,521 [1],[6],[22]
Investment, Identifier [Axis]: Espresso Bidco, Inc. | One stop 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6],[9]   0  
Fair value, beginning balance 9,051 [2],[8],[24] 9,051 [2],[8],[24] 0 [1],[6],[9]
Investment, Identifier [Axis]: Espresso Bidco, Inc. | One stop 3      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6],[9]   0  
Fair value, beginning balance (88) [2],[8],[10] (88) [2],[8],[10] 0 [1],[6],[9]
Investment, Identifier [Axis]: Essential Services Holdings Corporation | One stop 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6]   40,514  
Fair value, beginning balance 39,968 [2],[7],[8],[24] 39,968 [2],[7],[8],[24] 40,514 [1],[6]
Investment, Identifier [Axis]: Essential Services Holdings Corporation | One stop 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6]   965  
Fair value, beginning balance 2,088 [2],[8] 2,088 [2],[8] 965 [1],[6]
Investment, Identifier [Axis]: Essential Services Holdings Corporation | One stop 3      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6],[9]   (80)  
Fair value, beginning balance [1],[6],[9]     (80)
Investment, Identifier [Axis]: EverCommerce Solutions, Inc. | Senior secured      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[4],[5],[6]   8,058  
Fair value, beginning balance 7,638 [2],[8],[15],[18],[20] 7,638 [2],[8],[15],[18],[20] 8,058 [1],[4],[5],[6]
Investment, Identifier [Axis]: Evergreen IX Borrower , LLC | One stop 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6]   11,677  
Fair value, beginning balance [1],[6]     11,677
Investment, Identifier [Axis]: Evergreen IX Borrower , LLC | One stop 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6]   3,645  
Fair value, beginning balance [1],[6]     3,645
Investment, Identifier [Axis]: Evergreen IX Borrower , LLC | One stop 3      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6],[9]   0  
Fair value, beginning balance [1],[6],[9]     0
Investment, Identifier [Axis]: Evergreen IX Borrower 2023, LLC | One stop 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[7],[8] 11,413 11,413  
Investment, Identifier [Axis]: Evergreen IX Borrower 2023, LLC | One stop 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[8] 3,563 3,563  
Investment, Identifier [Axis]: Evergreen IX Borrower 2023, LLC | One stop 3      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[8],[10] (13) (13)  
Investment, Identifier [Axis]: Evertec, Inc. | Senior secured      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[4],[5],[6]   12,497  
Fair value, beginning balance 501 [2],[15],[18] 501 [2],[15],[18] 12,497 [1],[4],[5],[6]
Investment, Identifier [Axis]: Excel Fitness Consolidator, LLC | Senior secured 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[8] 1,595 1,595  
Investment, Identifier [Axis]: Excel Fitness Consolidator, LLC | Senior secured 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[7],[8] 5,245 5,245  
Investment, Identifier [Axis]: Excelitas Technologies Corp. | One stop 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6],[31]   16,020  
Fair value, beginning balance 2,356 [2],[8] 2,356 [2],[8] 16,020 [1],[6],[31]
Investment, Identifier [Axis]: Excelitas Technologies Corp. | One stop 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6],[9]   0  
Fair value, beginning balance 15,289 [2],[8],[29] 15,289 [2],[8],[29] 0 [1],[6],[9]
Investment, Identifier [Axis]: FINThrive Software Intermediate Holdings, Inc. | Senior secured      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[3],[5]   1,989  
Fair value, beginning balance 1,010 [2],[18],[19],[34] 1,010 [2],[18],[19],[34] 1,989 [1],[3],[5]
Investment, Identifier [Axis]: FYI Optical Acquisitions, Inc. | One stop 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[8],[15],[29],[33] 11,241 11,241  
Investment, Identifier [Axis]: FYI Optical Acquisitions, Inc. | One stop 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[8],[15],[29],[33] 8,285 8,285  
Investment, Identifier [Axis]: Fertitta Entertainment, LLC | Senior secured      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[3],[5],[6]   20,782  
Fair value, beginning balance 5,471 [2],[8],[18],[19],[20] 5,471 [2],[8],[18],[19],[20] 20,782 [1],[3],[5],[6]
Investment, Identifier [Axis]: Filtration Group Corp. | Senior secured      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[3],[5],[6]   17,916  
Fair value, beginning balance 10,208 [2],[8],[19],[20] 10,208 [2],[8],[19],[20] 17,916 [1],[3],[5],[6]
Investment, Identifier [Axis]: Financial Information Technologies, LLC | One stop 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6],[9]   0  
Fair value, beginning balance (76) [2],[8],[10] (76) [2],[8],[10] 0 [1],[6],[9]
Investment, Identifier [Axis]: Financial Information Technologies, LLC | One stop 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6]   84  
Fair value, beginning balance 82 [2],[8] 82 [2],[8] 84 [1],[6]
Investment, Identifier [Axis]: Financial Information Technologies, LLC | One stop 3      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6],[30]   41,295  
Fair value, beginning balance 40,575 [2],[8],[21] 40,575 [2],[8],[21] 41,295 [1],[6],[30]
Investment, Identifier [Axis]: Finastra USA, Inc. | One stop      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[4],[6],[25]   5,745  
Fair value, beginning balance [1],[4],[6],[25]     5,745
Investment, Identifier [Axis]: Finastra | Senior secured      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[3],[4],[5],[25]   8,723  
Fair value, beginning balance 8,070 [2],[15],[18],[19],[20],[26] 8,070 [2],[15],[18],[19],[20],[26] 8,723 [1],[3],[4],[5],[25]
Investment, Identifier [Axis]: First Eagle Investment Management | Senior secured 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[3],[5]   13,840  
Fair value, beginning balance 14,013 [2],[18],[19],[20] 14,013 [2],[18],[19],[20] 13,840 [1],[3],[5]
Investment, Identifier [Axis]: First Eagle Investment Management | Senior secured 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[3],[5],[9]   (20)  
Fair value, beginning balance 1 [2],[10],[18],[19],[20] 1 [2],[10],[18],[19],[20] (20) [1],[3],[5],[9]
Investment, Identifier [Axis]: Flexera Software, LLC | One stop 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6],[31]   11,224  
Fair value, beginning balance 10,677 [2],[8],[29] 10,677 [2],[8],[29] 11,224 [1],[6],[31]
Investment, Identifier [Axis]: Flexera Software, LLC | One stop 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6]   31,687  
Fair value, beginning balance 30,972 [2],[7],[8] 30,972 [2],[7],[8] 31,687 [1],[6]
Investment, Identifier [Axis]: Flexera Software, LLC | One stop 3      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6],[9]   (6)  
Fair value, beginning balance (61) [2],[8],[10] (61) [2],[8],[10] (6) [1],[6],[9]
Investment, Identifier [Axis]: Flexera Software, LLC | One stop 4      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[8] 9,762 9,762  
Investment, Identifier [Axis]: Focus Financial Partners, LLC | Senior secured      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[3],[5],[6]   24,812  
Fair value, beginning balance 23,908 [2],[8],[18],[19],[20] 23,908 [2],[8],[18],[19],[20] 24,812 [1],[3],[5],[6]
Investment, Identifier [Axis]: GFP Atlantic Holdco , LLC | One stop 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[17]   2,594  
Fair value, beginning balance [1],[17]     2,594
Investment, Identifier [Axis]: GFP Atlantic Holdco , LLC | One stop 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6]   1,940  
Fair value, beginning balance [1],[6]     1,940
Investment, Identifier [Axis]: GHX Ultimate Parent Corporation | One stop 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6]   75,662  
Fair value, beginning balance 76,045 [2],[7],[8],[24] 76,045 [2],[7],[8],[24] 75,662 [1],[6]
Investment, Identifier [Axis]: GHX Ultimate Parent Corporation | One stop 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6],[9]   0  
Fair value, beginning balance 0 [2],[8],[10] 0 [2],[8],[10] 0 [1],[6],[9]
Investment, Identifier [Axis]: GHX Ultimate Parent Corporation | One stop 3      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[8],[24] 63,854 63,854  
Investment, Identifier [Axis]: GMF Parent, Inc. | One stop 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[8] 73 73  
Investment, Identifier [Axis]: GMF Parent, Inc. | One stop 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[8] 5,726 5,726  
Investment, Identifier [Axis]: GMF Parent, Inc. | One stop 3      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[8],[10] (16) (16)  
Investment, Identifier [Axis]: GTCR Everest Borrower, LLC | Senior secured      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[3],[5],[6]   17,684  
Fair value, beginning balance 3,473 [2],[18],[20] 3,473 [2],[18],[20] 17,684 [1],[3],[5],[6]
Investment, Identifier [Axis]: GTIV, LLC | One stop      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[8] 45,612 45,612  
Investment, Identifier [Axis]: Galway Borrower LLC | One stop      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[17]   4,859  
Fair value, beginning balance [1],[17]     4,859
Investment, Identifier [Axis]: Galway Borrower LLC | One stop 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[7],[8] 21,954 21,954  
Investment, Identifier [Axis]: Galway Borrower LLC | One stop 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[8] 526 526  
Investment, Identifier [Axis]: Galway Borrower LLC | One stop 3      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[8] 625 625  
Investment, Identifier [Axis]: Galway Borrower LLC | One stop 4      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[8],[10] (21) (21)  
Investment, Identifier [Axis]: Galway Borrower LLC | One stop 5      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[8] 897 897  
Investment, Identifier [Axis]: Geosyntec Consultants, Inc. | Senior secured      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[3],[5],[6]   16,879  
Fair value, beginning balance 7,822 [2],[18],[19],[20] 7,822 [2],[18],[19],[20] 16,879 [1],[3],[5],[6]
Investment, Identifier [Axis]: Gimlet Bidco GMBH | One stop 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[4],[6],[31],[43]   1,743  
Fair value, beginning balance 1,699 [2],[8],[15],[29],[44] 1,699 [2],[8],[15],[29],[44] 1,743 [1],[4],[6],[31],[43]
Investment, Identifier [Axis]: Gimlet Bidco GMBH | One stop 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[4],[6],[31],[43]   619  
Fair value, beginning balance 692 [2],[8],[15],[29],[44] 692 [2],[8],[15],[29],[44] 619 [1],[4],[6],[31],[43]
Investment, Identifier [Axis]: Gimlet Bidco GMBH | One stop 3      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[4],[6],[9],[31],[43]   (82)  
Fair value, beginning balance 2,621 [2],[8],[15],[29],[44] 2,621 [2],[8],[15],[29],[44] (82) [1],[4],[6],[9],[31],[43]
Investment, Identifier [Axis]: GoldenTree Loan Management US CLO 15, Ltd. | Structured Finance Note      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[13],[14],[15] 2,257 2,257  
Investment, Identifier [Axis]: GoldenTree Loan Management US CLO 17, Ltd. | Structured Finance Note      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[4],[11],[12]   1,526  
Fair value, beginning balance 1,514 [2],[13],[14],[15] 1,514 [2],[13],[14],[15] 1,526 [1],[4],[11],[12]
Investment, Identifier [Axis]: GoldenTree Loan Management US CLO 27, Ltd. | Structured Finance Note      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[14],[15],[16] 7,561 7,561  
Investment, Identifier [Axis]: Grant Thornton Advisors, LLC | Senior secured      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[3],[5]   14,748  
Fair value, beginning balance 13,968 [2],[18],[19],[20] 13,968 [2],[18],[19],[20] 14,748 [1],[3],[5]
Investment, Identifier [Axis]: Green Lakes Park CLO, LLC | Structured Finance Note      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[4],[12]   3,368  
Fair value, beginning balance 3,295 [2],[14],[15] 3,295 [2],[14],[15] 3,368 [1],[4],[12]
Investment, Identifier [Axis]: Groundworks, LLC | Senior secured      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[18],[19],[20] 7,440 7,440  
Investment, Identifier [Axis]: Groundworks, LLC | Senior secured 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[3],[5],[6]   12,612  
Fair value, beginning balance [1],[3],[5],[6]     12,612
Investment, Identifier [Axis]: Groundworks, LLC | Senior secured 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[3],[5],[6]   374  
Fair value, beginning balance [1],[3],[5],[6]     374
Investment, Identifier [Axis]: Gurobi Optimization, LLC | Common stock      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2] 196 196  
Investment, Identifier [Axis]: Gurobi Optimization, LLC | LLC units      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1]   229  
Fair value, beginning balance [1]     229
Investment, Identifier [Axis]: Gurobi Optimization, LLC | One stop 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6],[30]   43,789  
Fair value, beginning balance 40,870 [2],[8] 40,870 [2],[8] 43,789 [1],[6],[30]
Investment, Identifier [Axis]: Gurobi Optimization, LLC | One stop 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6],[9]   0  
Fair value, beginning balance 0 [2],[8],[10] 0 [2],[8],[10] 0 [1],[6],[9]
Investment, Identifier [Axis]: HP TLE Buyer, Inc. | LP interest      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2] 862 862  
Investment, Identifier [Axis]: HP TLE Buyer, Inc. | One stop 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[30]   16,311  
Fair value, beginning balance 16,893 [2],[8],[21] 16,893 [2],[8],[21] 16,311 [1],[30]
Investment, Identifier [Axis]: HP TLE Buyer, Inc. | One stop 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6],[9]   (18)  
Fair value, beginning balance 0 [2],[8],[10] 0 [2],[8],[10] (18) [1],[6],[9]
Investment, Identifier [Axis]: HS Spa Holdings, Inc. | One stop 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6],[17]   7,798  
Fair value, beginning balance 7,738 [2],[7],[8] 7,738 [2],[7],[8] 7,798 [1],[6],[17]
Investment, Identifier [Axis]: HS Spa Holdings, Inc. | One stop 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6]   897  
Fair value, beginning balance 890 [2],[8] 890 [2],[8] 897 [1],[6]
Investment, Identifier [Axis]: Hanger, Inc. | Senior secured 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[3],[5],[6]   14,147  
Fair value, beginning balance 14,060 [2],[8],[18],[19],[20] 14,060 [2],[8],[18],[19],[20] 14,147 [1],[3],[5],[6]
Investment, Identifier [Axis]: Hanger, Inc. | Senior secured 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[3],[5],[6]   279  
Fair value, beginning balance 1,291 [2],[8],[18],[19],[20] 1,291 [2],[8],[18],[19],[20] 279 [1],[3],[5],[6]
Investment, Identifier [Axis]: Health Buyer, LLC | Senior secured 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[17]   4,888  
Fair value, beginning balance [1],[17]     4,888
Investment, Identifier [Axis]: Health Buyer, LLC | Senior secured 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6]   397  
Fair value, beginning balance [1],[6]     397
Investment, Identifier [Axis]: Healthmark Holdings, L.P. | One stop 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6],[9]   (29)  
Fair value, beginning balance (36) [2],[8],[10] (36) [2],[8],[10] (29) [1],[6],[9]
Investment, Identifier [Axis]: Healthmark Holdings, L.P. | One stop 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6],[9]   (24)  
Fair value, beginning balance (47) [2],[8],[10] (47) [2],[8],[10] (24) [1],[6],[9]
Investment, Identifier [Axis]: Healthmark Holdings, L.P. | One stop 3      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6]   22,921  
Fair value, beginning balance 23,914 [2],[7],[8] 23,914 [2],[7],[8] 22,921 [1],[6]
Investment, Identifier [Axis]: Higginbotham Insurance Agency, Inc. | One stop 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6],[17]   3,399  
Fair value, beginning balance 8,213 [2],[7],[8] 8,213 [2],[7],[8] 3,399 [1],[6],[17]
Investment, Identifier [Axis]: Higginbotham Insurance Agency, Inc. | One stop 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6]   3,455  
Fair value, beginning balance 882 [2],[8] 882 [2],[8] 3,455 [1],[6]
Investment, Identifier [Axis]: Higginbotham Insurance Agency, Inc. | Senior secured      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[8] 1,610 1,610  
Investment, Identifier [Axis]: High Bar Brands Operating, LLC | Senior secured 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6]   599  
Fair value, beginning balance 588 [2],[8] 588 [2],[8] 599 [1],[6]
Investment, Identifier [Axis]: High Bar Brands Operating, LLC | Senior secured 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6]   125  
Fair value, beginning balance 122 [2],[8] 122 [2],[8] 125 [1],[6]
Investment, Identifier [Axis]: High Bar Brands Operating, LLC | Senior secured 3      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6]   106  
Fair value, beginning balance 104 [2],[8] 104 [2],[8] 106 [1],[6]
Investment, Identifier [Axis]: High Bar Brands Operating, LLC | Senior secured 4      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6]   7  
Fair value, beginning balance 48 [2],[8] 48 [2],[8] 7 [1],[6]
Investment, Identifier [Axis]: Higley Park CLO, Ltd. | Structured Finance Note      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[4],[12],[27]   3,791  
Fair value, beginning balance [1],[4],[12],[27]     3,791
Investment, Identifier [Axis]: Hook Park CLO, Ltd. | Structured Finance Note      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[4],[12],[27]   3,016  
Fair value, beginning balance [1],[4],[12],[27]     3,016
Investment, Identifier [Axis]: Hornet Security Holding GMBH | One stop 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[4],[6],[31],[43]   16,112  
Fair value, beginning balance [1],[4],[6],[31],[43]     16,112
Investment, Identifier [Axis]: Hornet Security Holding GMBH | One stop 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[4],[6],[31],[43]   10,739  
Fair value, beginning balance [1],[4],[6],[31],[43]     10,739
Investment, Identifier [Axis]: Hornet Security Holding GMBH | One stop 3      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[4],[6],[31],[43]   259  
Fair value, beginning balance [1],[4],[6],[31],[43]     259
Investment, Identifier [Axis]: Hornet Security Holding GMBH | One stop 4      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[4],[6],[31],[43]   2,261  
Fair value, beginning balance [1],[4],[6],[31],[43]     2,261
Investment, Identifier [Axis]: Howden Group Holdings Limited | Senior secured 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[3],[4],[5],[6],[25]   5,830  
Fair value, beginning balance 14,789 [2],[8],[15],[18],[19],[20],[26] 14,789 [2],[8],[15],[18],[19],[20],[26] 5,830 [1],[3],[4],[5],[6],[25]
Investment, Identifier [Axis]: Howden Group Holdings Limited | Senior secured 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[3],[4],[5],[6],[25]   20,877  
Fair value, beginning balance 3,088 [2],[15],[18],[20],[26] 3,088 [2],[15],[18],[20],[26] 20,877 [1],[3],[4],[5],[6],[25]
Investment, Identifier [Axis]: HuFriedy Group Acquisition, LLC | One stop 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6]   40,448  
Fair value, beginning balance 39,960 [2],[8] 39,960 [2],[8] 40,448 [1],[6]
Investment, Identifier [Axis]: HuFriedy Group Acquisition, LLC | One stop 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6],[9]   0  
Fair value, beginning balance 381 [2],[8] 381 [2],[8] 0 [1],[6],[9]
Investment, Identifier [Axis]: HuFriedy Group Acquisition, LLC | One stop 3      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6]   7,825  
Fair value, beginning balance 8,751 [2],[8] 8,751 [2],[8] 7,825 [1],[6]
Investment, Identifier [Axis]: HuFriedy Group Acquisition, LLC | One stop 4      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[8] 5,425 5,425  
Investment, Identifier [Axis]: Hub International Limited | Senior secured      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[4],[5],[6]   9,026  
Fair value, beginning balance 6,941 [2],[8],[15],[18],[20] 6,941 [2],[8],[15],[18],[20] 9,026 [1],[4],[5],[6]
Investment, Identifier [Axis]: Huskies Parent, Inc. | One stop      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[8] 8,829 8,829  
Investment, Identifier [Axis]: Hyland Software, Inc. | One stop 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6],[17],[30]   28,186  
Fair value, beginning balance 27,272 [2],[7],[8] 27,272 [2],[7],[8] 28,186 [1],[6],[17],[30]
Investment, Identifier [Axis]: Hyland Software, Inc. | One stop 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6],[9]   0  
Fair value, beginning balance (3) [2],[8],[10] (3) [2],[8],[10] 0 [1],[6],[9]
Investment, Identifier [Axis]: IG Investments Holdings, LLC | One stop      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6],[17]   22,741  
Fair value, beginning balance [1],[6],[17]     22,741
Investment, Identifier [Axis]: IG Investments Holdings, LLC | One stop 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[7],[8] 22,874 22,874  
Investment, Identifier [Axis]: IG Investments Holdings, LLC | One stop 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[8],[10] 0 0  
Investment, Identifier [Axis]: IGT Holding IV AB | Senior secured      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[15],[18],[20],[45] 1,957 1,957  
Investment, Identifier [Axis]: INEOS US Finance LLC and INEOS Finance PLC | Senior secured      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[4],[5],[6],[25]   8,794  
Fair value, beginning balance [1],[4],[5],[6],[25]     8,794
Investment, Identifier [Axis]: INEOS US Finance, LLC | Senior secured      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[8],[15],[18],[20],[26] 8,869 8,869  
Investment, Identifier [Axis]: Icefall Parent, Inc. | One stop 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6]   33,912  
Fair value, beginning balance 36,152 [2],[8],[21] 36,152 [2],[8],[21] 33,912 [1],[6]
Investment, Identifier [Axis]: Icefall Parent, Inc. | One stop 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6],[9]   0  
Fair value, beginning balance (109) [2],[8],[10] (109) [2],[8],[10] 0 [1],[6],[9]
Investment, Identifier [Axis]: Imprivata, Inc. | Senior secured      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[3],[5],[6]   25,744  
Fair value, beginning balance 15,456 [2],[8],[18],[19],[20] 15,456 [2],[8],[18],[19],[20] 25,744 [1],[3],[5],[6]
Investment, Identifier [Axis]: Inhance Parent, Inc. | One stop 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6]   0  
Fair value, beginning balance 414 [2],[8],[24] 414 [2],[8],[24] 0 [1],[6]
Investment, Identifier [Axis]: Inhance Parent, Inc. | One stop 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6],[22]   10,606  
Fair value, beginning balance 10,633 [2],[8],[24] 10,633 [2],[8],[24] 10,606 [1],[6],[22]
Investment, Identifier [Axis]: Inhance Parent, Inc. | One stop 3      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6],[22],[46]   2,381  
Fair value, beginning balance 2,643 [2],[8],[24],[34] 2,643 [2],[8],[24],[34] 2,381 [1],[6],[22],[46]
Investment, Identifier [Axis]: Innophos Holdings, Inc. | Senior secured      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[4],[5],[6]   5,327  
Fair value, beginning balance 5,090 [2],[8],[15],[18] 5,090 [2],[8],[15],[18] 5,327 [1],[4],[5],[6]
Investment, Identifier [Axis]: Inspire International, Inc. | Senior secured      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[4],[5],[6]   2,974  
Fair value, beginning balance 867 [2],[15],[18],[20] 867 [2],[15],[18],[20] 2,974 [1],[4],[5],[6]
Investment, Identifier [Axis]: Instructure Holdings, Inc. | Senior secured      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[3],[5],[6]   11,665  
Fair value, beginning balance 14,030 [2],[8],[18],[19],[20] 14,030 [2],[8],[18],[19],[20] 11,665 [1],[3],[5],[6]
Investment, Identifier [Axis]: Integrated Specialty Coverages, LLC | One stop 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6]   6,822  
Fair value, beginning balance [1],[6]     6,822
Investment, Identifier [Axis]: Integrated Specialty Coverages, LLC | One stop 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6],[9]   0  
Fair value, beginning balance [1],[6],[9]     0
Investment, Identifier [Axis]: Integrated Specialty Coverages, LLC | One stop 3      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6],[9]   0  
Fair value, beginning balance [1],[6],[9]     0
Investment, Identifier [Axis]: Integrity Marketing Acquisition, LLC | One stop 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6],[17]   27,728  
Fair value, beginning balance 27,771 [2],[7],[21] 27,771 [2],[7],[21] 27,728 [1],[6],[17]
Investment, Identifier [Axis]: Integrity Marketing Acquisition, LLC | One stop 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6],[9]   0  
Fair value, beginning balance 0 [2],[8],[10] 0 [2],[8],[10] 0 [1],[6],[9]
Investment, Identifier [Axis]: Integrity Marketing Acquisition, LLC | One stop 3      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6],[9]   0  
Fair value, beginning balance (3) [2],[8],[10] (3) [2],[8],[10] 0 [1],[6],[9]
Investment, Identifier [Axis]: Iris Holding, Inc. | Senior secured      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[3],[5]   2,905  
Fair value, beginning balance 2,834 [2],[18],[20] 2,834 [2],[18],[20] 2,905 [1],[3],[5]
Investment, Identifier [Axis]: Isto Group, Inc. | LP interest      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[29] 2,422 2,422  
Investment, Identifier [Axis]: Isto Group, Inc. | LP units      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[31]   2,166  
Fair value, beginning balance [1],[31]     2,166
Investment, Identifier [Axis]: Isto Group, Inc. | One stop 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6],[9]   (1)  
Fair value, beginning balance (1) [2],[8],[10] (1) [2],[8],[10] (1) [1],[6],[9]
Investment, Identifier [Axis]: Isto Group, Inc. | One stop 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6]   5,151  
Fair value, beginning balance 5,642 [2],[7],[8] 5,642 [2],[7],[8] 5,151 [1],[6]
Investment, Identifier [Axis]: Isto Group, Inc. | One stop 3      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6],[9]   (17)  
Fair value, beginning balance (13) [2],[8],[10] (13) [2],[8],[10] (17) [1],[6],[9]
Investment, Identifier [Axis]: Ivy Hill Middle Market Credit Fund XX, Ltd. | Structured Finance Note      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[4],[11],[12]   4,521  
Fair value, beginning balance 4,506 [2],[13],[14],[15] 4,506 [2],[13],[14],[15] 4,521 [1],[4],[11],[12]
Investment, Identifier [Axis]: J.S. Held Holdings, LLC | One stop 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[17],[30]   19,657  
Fair value, beginning balance 19,892 [2],[7],[8],[21] 19,892 [2],[7],[8],[21] 19,657 [1],[17],[30]
Investment, Identifier [Axis]: J.S. Held Holdings, LLC | One stop 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6]   10,536  
Fair value, beginning balance 19,138 [2],[8] 19,138 [2],[8] 10,536 [1],[6]
Investment, Identifier [Axis]: J.S. Held Holdings, LLC | One stop 3      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6],[9]   0  
Fair value, beginning balance (1) [2],[8],[10] (1) [2],[8],[10] 0 [1],[6],[9]
Investment, Identifier [Axis]: JHCC Holdings LLC | One stop 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[17]   9,408  
Fair value, beginning balance [1],[17]     9,408
Investment, Identifier [Axis]: JHCC Holdings LLC | One stop 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6]   4,264  
Fair value, beginning balance [1],[6]     4,264
Investment, Identifier [Axis]: JHCC Holdings LLC | One stop 3      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[17]   2,578  
Fair value, beginning balance [1],[17]     2,578
Investment, Identifier [Axis]: JSG II, Inc. and Checkers USA, Inc. | One stop 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6]   20,435  
Fair value, beginning balance 20,342 [2],[8] 20,342 [2],[8] 20,435 [1],[6]
Investment, Identifier [Axis]: JSG II, Inc. and Checkers USA, Inc. | One stop 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6]   183  
Fair value, beginning balance (11) [2],[8],[10] (11) [2],[8],[10] 183 [1],[6]
Investment, Identifier [Axis]: JSG II, Inc. and Checkers USA, Inc. | One stop 3      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6],[9]   (28)  
Fair value, beginning balance (26) [2],[8],[10] (26) [2],[8],[10] (28) [1],[6],[9]
Investment, Identifier [Axis]: Javelin Buyer, Inc. | Senior secured      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[3],[5],[6]   20,079  
Fair value, beginning balance 18,758 [2],[8],[18],[19],[20] 18,758 [2],[8],[18],[19],[20] 20,079 [1],[3],[5],[6]
Investment, Identifier [Axis]: Jawbreaker Parent, Inc. | One stop 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[8] 8,087 8,087  
Investment, Identifier [Axis]: Jawbreaker Parent, Inc. | One stop 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[8],[10] (11) (11)  
Investment, Identifier [Axis]: Jawbreaker Parent, Inc. | One stop 3      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[8],[10] (11) (11)  
Investment, Identifier [Axis]: Jeppesen Holdings, LLC | One stop 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[8] 107,458 107,458  
Investment, Identifier [Axis]: Jeppesen Holdings, LLC | One stop 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[8],[10] (114) (114)  
Investment, Identifier [Axis]: KKR Apple Bidco, LLC | Senior secured      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[5],[6]   9,080  
Fair value, beginning balance 2,991 [2],[18],[20] 2,991 [2],[18],[20] 9,080 [1],[5],[6]
Investment, Identifier [Axis]: Kairos Bidco Limited | One stop 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6]   80  
Fair value, beginning balance 72 [2],[8] 72 [2],[8] 80 [1],[6]
Investment, Identifier [Axis]: Kairos Bidco Limited | One stop 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6]   4,865  
Fair value, beginning balance 4,816 [2],[21] 4,816 [2],[21] 4,865 [1],[6]
Investment, Identifier [Axis]: Kairos Bidco Limited | One stop 3      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6],[9]   (8)  
Fair value, beginning balance (24) [2],[8],[10] (24) [2],[8],[10] (8) [1],[6],[9]
Investment, Identifier [Axis]: Kairos Bidco Limited | One stop 4      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6]   732  
Fair value, beginning balance 724 [2],[8] 724 [2],[8] 732 [1],[6]
Investment, Identifier [Axis]: Kaman Corporation | Senior secured      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[18],[20] 0 0  
Investment, Identifier [Axis]: Kaman Corporation | Senior secured 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[3],[5]   3,411  
Fair value, beginning balance [1],[3],[5]     3,411
Investment, Identifier [Axis]: Kaman Corporation | Senior secured 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[3],[5]   30  
Fair value, beginning balance [1],[3],[5]     30
Investment, Identifier [Axis]: Kaseya Inc. | Senior secured      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[5],[6]   14,814  
Fair value, beginning balance [1],[5],[6]     14,814
Investment, Identifier [Axis]: Kenan Advantage Group, Inc. | Senior secured      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[3],[5],[6]   26,413  
Fair value, beginning balance 23,743 [2],[8],[18],[19],[20] 23,743 [2],[8],[18],[19],[20] 26,413 [1],[3],[5],[6]
Investment, Identifier [Axis]: Kleinfelder Intermediate, LLC | One stop 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6]   1,801  
Fair value, beginning balance 1,783 [2],[7],[8] 1,783 [2],[7],[8] 1,801 [1],[6]
Investment, Identifier [Axis]: Kleinfelder Intermediate, LLC | One stop 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6]   44  
Fair value, beginning balance 18 [2],[8] 18 [2],[8] 44 [1],[6]
Investment, Identifier [Axis]: Kleinfelder Intermediate, LLC | One stop 3      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6]   196  
Fair value, beginning balance 194 [2],[8] 194 [2],[8] 196 [1],[6]
Investment, Identifier [Axis]: Kleinfelder Intermediate, LLC | One stop 4      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[8],[10] (5) (5)  
Investment, Identifier [Axis]: KnowBe | Senior secured      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[3],[5]   13,955  
Fair value, beginning balance [1],[3],[5]     13,955
Investment, Identifier [Axis]: KnowBe4 | Senior secured      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[18],[19] 10,873 10,873  
Investment, Identifier [Axis]: Knowledge Universe Education LLC | Senior secured      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[4],[5],[6]   5,958  
Fair value, beginning balance 7,621 [2],[8],[15],[18],[20] 7,621 [2],[8],[15],[18],[20] 5,958 [1],[4],[5],[6]
Investment, Identifier [Axis]: Koala Investment Holdings, Inc. | One stop 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[4],[6],[25]   69,565  
Fair value, beginning balance 69,635 [2],[8],[21] 69,635 [2],[8],[21] 69,565 [1],[4],[6],[25]
Investment, Identifier [Axis]: Koala Investment Holdings, Inc. | One stop 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[4],[6],[9],[25]   (60)  
Fair value, beginning balance 3,137 [2],[8] 3,137 [2],[8] (60) [1],[4],[6],[9],[25]
Investment, Identifier [Axis]: Koala Investment Holdings, Inc. | One stop 3      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[4],[6],[9],[25]   (135)  
Fair value, beginning balance (122) [2],[8],[10] (122) [2],[8],[10] (135) [1],[4],[6],[9],[25]
Investment, Identifier [Axis]: Kodiak Buyer, LLC | Common stock      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2] 519 519  
Investment, Identifier [Axis]: Kodiak Buyer, LLC | LP interest      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1]   448  
Fair value, beginning balance [1]     448
Investment, Identifier [Axis]: Kodiak Buyer, LLC | One stop 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[17]   4,946  
Fair value, beginning balance 4,971 [2],[7] 4,971 [2],[7] 4,946 [1],[17]
Investment, Identifier [Axis]: Kodiak Buyer, LLC | One stop 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6],[9]   (7)  
Fair value, beginning balance 0 [2],[8],[10] 0 [2],[8],[10] (7) [1],[6],[9]
Investment, Identifier [Axis]: Kodiak Buyer, LLC | One stop 3      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6],[9]   (9)  
Fair value, beginning balance 156 [2],[8] 156 [2],[8] (9) [1],[6],[9]
Investment, Identifier [Axis]: Kona Buyer, LLC | One stop 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6]   13,091  
Fair value, beginning balance 12,862 [2],[7],[8] 12,862 [2],[7],[8] 13,091 [1],[6]
Investment, Identifier [Axis]: Kona Buyer, LLC | One stop 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6]   768  
Fair value, beginning balance 755 [2],[8] 755 [2],[8] 768 [1],[6]
Investment, Identifier [Axis]: Kona Buyer, LLC | One stop 3      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6],[9]   0  
Fair value, beginning balance 188 [2],[8] 188 [2],[8] 0 [1],[6],[9]
Investment, Identifier [Axis]: Kona Buyer, LLC | One stop 4      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6]   216  
Fair value, beginning balance 212 [2],[8] 212 [2],[8] 216 [1],[6]
Investment, Identifier [Axis]: Kona Buyer, LLC | One stop 5      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6]   0  
Fair value, beginning balance (39) [2],[8],[10] (39) [2],[8],[10] 0 [1],[6]
Investment, Identifier [Axis]: Kona Buyer, LLC | One stop 6      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6]   0  
Fair value, beginning balance 2,525 [2],[8] 2,525 [2],[8] 0 [1],[6]
Investment, Identifier [Axis]: Kona Buyer, LLC | One stop 7      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6]   0  
Fair value, beginning balance 2,798 [2],[8] 2,798 [2],[8] 0 [1],[6]
Investment, Identifier [Axis]: Kona Buyer, LLC | One stop 8      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6]   0  
Fair value, beginning balance [1],[6]     0
Investment, Identifier [Axis]: Krayden Holdings, Inc. | Senior secured 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[17]   8,623  
Fair value, beginning balance 8,503 [2],[7] 8,503 [2],[7] 8,623 [1],[17]
Investment, Identifier [Axis]: Krayden Holdings, Inc. | Senior secured 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6]   571  
Fair value, beginning balance 1,254 [2],[8] 1,254 [2],[8] 571 [1],[6]
Investment, Identifier [Axis]: Krayden Holdings, Inc. | Senior secured 3      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6]   2,687  
Fair value, beginning balance 2,611 [2],[8] 2,611 [2],[8] 2,687 [1],[6]
Investment, Identifier [Axis]: Krueger-Gilbert Health Physics, LLC | One stop      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[8] 499 499  
Investment, Identifier [Axis]: LDS Intermediate Holdings, LLC | One stop 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6],[17]   54,207  
Fair value, beginning balance 53,862 [2],[7],[8] 53,862 [2],[7],[8] 54,207 [1],[6],[17]
Investment, Identifier [Axis]: LDS Intermediate Holdings, LLC | One stop 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6],[9]   (82)  
Fair value, beginning balance (72) [2],[8],[10] (72) [2],[8],[10] (82) [1],[6],[9]
Investment, Identifier [Axis]: LDS Intermediate Holdings, LLC | One stop 3      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6]   10,734  
Fair value, beginning balance 10,666 [2],[8] 10,666 [2],[8] 10,734 [1],[6]
Investment, Identifier [Axis]: LDS Intermediate Holdings, LLC | One stop 4      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6],[9]   (80)  
Fair value, beginning balance (62) [2],[8],[10] (62) [2],[8],[10] (80) [1],[6],[9]
Investment, Identifier [Axis]: LDS Intermediate Holdings, LLC | One stop 5      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6]   792  
Fair value, beginning balance 1,784 [2],[8] 1,784 [2],[8] 792 [1],[6]
Investment, Identifier [Axis]: LEIA FINCO US | Senior secured      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[3],[4],[5],[6],[25]   14,952  
Fair value, beginning balance 19,977 [2],[8],[15],[18],[19],[20],[26] 19,977 [2],[8],[15],[18],[19],[20],[26] 14,952 [1],[3],[4],[5],[6],[25]
Investment, Identifier [Axis]: LOV Acquisition LLC | Senior secured 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6],[17],[30]   26,953  
Fair value, beginning balance [1],[6],[17],[30]     26,953
Investment, Identifier [Axis]: LOV Acquisition LLC | Senior secured 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6],[9]   0  
Fair value, beginning balance [1],[6],[9]     0
Investment, Identifier [Axis]: LOV Acquisition, LLC | Senior secured 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[7],[8],[21] 23,974 23,974  
Investment, Identifier [Axis]: LOV Acquisition, LLC | Senior secured 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[8],[10] 0 0  
Investment, Identifier [Axis]: LSF Trinity Bidco, Inc. | Senior secured      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[3],[6]   15,075  
Fair value, beginning balance [1],[3],[6]     15,075
Investment, Identifier [Axis]: LSF11 Trinity Bidco, Inc. | Senior secured      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[18] 3,124 3,124  
Investment, Identifier [Axis]: Lacker Bidco Limited | One stop 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[4],[6],[25],[31]   12,905  
Fair value, beginning balance [25] 12,855 [2],[8],[15],[29] 12,855 [2],[8],[15],[29] 12,905 [1],[4],[6],[31]
Investment, Identifier [Axis]: Lacker Bidco Limited | One stop 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[4],[6],[25],[31]   10,652  
Fair value, beginning balance [25] 17,341 [2],[8],[15],[24],[29] 17,341 [2],[8],[15],[24],[29] 10,652 [1],[4],[6],[31]
Investment, Identifier [Axis]: Lacker Bidco Limited | One stop 3      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[4],[6],[9],[25],[31]   (29)  
Fair value, beginning balance [25] 0 [2],[8],[10],[15],[29] 0 [2],[8],[10],[15],[29] (29) [1],[4],[6],[9],[31]
Investment, Identifier [Axis]: Lacker Bidco Limited | One stop 4      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[8],[15],[25],[29] 392 392  
Investment, Identifier [Axis]: LeadsOnline, LLC | One stop 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[17]   4,373  
Fair value, beginning balance [1],[17]     4,373
Investment, Identifier [Axis]: LeadsOnline, LLC | One stop 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[17]   2,230  
Fair value, beginning balance [1],[17]     2,230
Investment, Identifier [Axis]: LeadsOnline, LLC | One stop 3      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6]   772  
Fair value, beginning balance [1],[6]     772
Investment, Identifier [Axis]: LeadsOnline, LLC | One stop 4      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6],[9]   0  
Fair value, beginning balance [1],[6],[9]     0
Investment, Identifier [Axis]: Lightcast Global, Inc. | One stop 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[8] 0 0  
Investment, Identifier [Axis]: Lightcast Global, Inc. | One stop 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[7],[8] 12,925 12,925  
Investment, Identifier [Axis]: Lighthouse Bidco GMBH | One stop 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[4],[6],[31],[43]   26,659  
Fair value, beginning balance [1],[4],[6],[31],[43]     26,659
Investment, Identifier [Axis]: Lighthouse Bidco GMBH | One stop 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[4],[6],[9],[31],[43]   0  
Fair value, beginning balance [1],[4],[6],[9],[31],[43]     0
Investment, Identifier [Axis]: Lighthouse Bidco GMBH | One stop 3      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[4],[6],[9],[31],[43]   0  
Fair value, beginning balance [1],[4],[6],[9],[31],[43]     0
Investment, Identifier [Axis]: Liminex, Inc. | One stop      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6]   10,599  
Fair value, beginning balance 10,467 [2],[7] 10,467 [2],[7] 10,599 [1],[6]
Investment, Identifier [Axis]: Lincoln Acq Buyer, LLC | One stop 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[8] 670 670  
Investment, Identifier [Axis]: Lincoln Acq Buyer, LLC | One stop 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[8] 223 223  
Investment, Identifier [Axis]: Lincoln Acq Buyer, LLC | One stop 3      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[8] 363 363  
Investment, Identifier [Axis]: Lincoln Acq Buyer, LLC | One stop 4      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[8] 139 139  
Investment, Identifier [Axis]: Lincoln Acq Buyer, LLC | One stop 5      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[7] 5,579 5,579  
Investment, Identifier [Axis]: Lincoln Acq Buyer, LLC | One stop 6      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[8],[10] 0 0  
Investment, Identifier [Axis]: Lincoln Acq Buyer, LLC | One stop 7      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[8] 223 223  
Investment, Identifier [Axis]: Litera Bidco, LLC | One stop 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6]   28,297  
Fair value, beginning balance 27,661 [2],[7],[8] 27,661 [2],[7],[8] 28,297 [1],[6]
Investment, Identifier [Axis]: Litera Bidco, LLC | One stop 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6]   11,298  
Fair value, beginning balance 11,030 [2],[8] 11,030 [2],[8] 11,298 [1],[6]
Investment, Identifier [Axis]: Litera Bidco, LLC | One stop 3      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6]   287  
Fair value, beginning balance (29) [2],[8],[10] (29) [2],[8],[10] 287 [1],[6]
Investment, Identifier [Axis]: Litera Bidco, LLC | One stop 4      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6]   0  
Fair value, beginning balance (56) [2],[8],[10] (56) [2],[8],[10] 0 [1],[6]
Investment, Identifier [Axis]: LogicMonitor, Inc. | LLC units      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1]   277  
Fair value, beginning balance [1]     277
Investment, Identifier [Axis]: LogicMonitor, Inc. | LP interest      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2] 275 275  
Investment, Identifier [Axis]: LogicMonitor, Inc. | One stop 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6]   45,630  
Fair value, beginning balance 51,382 [2],[8] 51,382 [2],[8] 45,630 [1],[6]
Investment, Identifier [Axis]: LogicMonitor, Inc. | One stop 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6],[9]   0  
Fair value, beginning balance (86) [2],[8],[10] (86) [2],[8],[10] 0 [1],[6],[9]
Investment, Identifier [Axis]: LogicMonitor, Inc. | One stop 3      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[8],[10] (49) (49)  
Investment, Identifier [Axis]: Lotus Topco, Inc. | One stop 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[17]   1,672  
Fair value, beginning balance 2,306 [2],[7],[8] 2,306 [2],[7],[8] 1,672 [1],[17]
Investment, Identifier [Axis]: Lotus Topco, Inc. | One stop 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6],[9]   (3)  
Fair value, beginning balance 0 [2],[8],[10] 0 [2],[8],[10] (3) [1],[6],[9]
Investment, Identifier [Axis]: Lotus Topco, Inc. | One stop 3      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6]   207  
Fair value, beginning balance 0 [2],[8],[10] 0 [2],[8],[10] 207 [1],[6]
Investment, Identifier [Axis]: Lotus Topco, Inc. | One stop 4      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6]   10,135  
Fair value, beginning balance 10,135 [2],[21] 10,135 [2],[21] 10,135 [1],[6]
Investment, Identifier [Axis]: Louisiana Fish Fry Products, Ltd. | One stop      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[30]   8,713  
Fair value, beginning balance 8,645 [2],[21] 8,645 [2],[21] 8,713 [1],[30]
Investment, Identifier [Axis]: Lumen Bidco 1 Limited | One stop 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[8],[15],[26],[29] 404 404  
Investment, Identifier [Axis]: Lumen Bidco 1 Limited | One stop 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[8],[15],[26],[29] 0 0  
Investment, Identifier [Axis]: Lumen Bidco 1 Limited | One stop 3      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[8],[15],[26],[29] 0 0  
Investment, Identifier [Axis]: MCF CLO IV, LLC | Structured Finance Note      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[4]   4,750  
Fair value, beginning balance 4,768 [2],[14],[15] 4,768 [2],[14],[15] 4,750 [1],[4]
Investment, Identifier [Axis]: MIC GLEN LLC | Senior secured      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[3],[5],[6]   25,124  
Fair value, beginning balance [1],[3],[5],[6]     25,124
Investment, Identifier [Axis]: MIC GLEN, LLC | Senior secured      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[8],[18],[19],[20] 19,838 19,838  
Investment, Identifier [Axis]: MOP GM Holding, LLC | Preferred stock      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2] 2 2  
Investment, Identifier [Axis]: MRH Trowe Germany GMBH | One stop 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[4],[6],[9],[31],[43]   0  
Fair value, beginning balance (68) [2],[8],[10],[15],[29],[44] (68) [2],[8],[10],[15],[29],[44] 0 [1],[4],[6],[9],[31],[43]
Investment, Identifier [Axis]: MRH Trowe Germany GMBH | One stop 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[4],[6],[31],[43]   65,002  
Fair value, beginning balance 62,495 [2],[8],[15],[29],[44] 62,495 [2],[8],[15],[29],[44] 65,002 [1],[4],[6],[31],[43]
Investment, Identifier [Axis]: MRH Trowe Germany GMBH | One stop 3      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[4],[6],[31],[43]   2,458  
Fair value, beginning balance 11,456 [2],[8],[15],[29],[44] 11,456 [2],[8],[15],[29],[44] 2,458 [1],[4],[6],[31],[43]
Investment, Identifier [Axis]: MS Buyer, Inc. | LP interest      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2] 304 304  
Investment, Identifier [Axis]: MS Buyer, Inc. | One stop 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[8] 42,402 42,402  
Investment, Identifier [Axis]: MS Buyer, Inc. | One stop 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[8] 285 285  
Investment, Identifier [Axis]: MS Buyer, Inc. | One stop 3      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[8] 6,392 6,392  
Investment, Identifier [Axis]: MYOB Invest Co Pty Ltd | One stop      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[4],[6],[22],[31],[47]   166,823  
Fair value, beginning balance 173,849 [2],[8],[15],[24],[28],[29] 173,849 [2],[8],[15],[24],[28],[29] 166,823 [1],[4],[6],[22],[31],[47]
Investment, Identifier [Axis]: Madison IAQ LLC | Senior secured      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[4],[5],[6]   4,890  
Fair value, beginning balance [1],[4],[5],[6]     4,890
Investment, Identifier [Axis]: Madison Park Funding XLVIII, Ltd. | Structured Finance Note      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[14],[15],[16] 4,370 4,370  
Investment, Identifier [Axis]: Madison Park Funding XVII, Ltd. | Structured Finance Note      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[4],[12],[27]   5,730  
Fair value, beginning balance 5,551 [2],[14],[15],[16] 5,551 [2],[14],[15],[16] 5,730 [1],[4],[12],[27]
Investment, Identifier [Axis]: Majesco | One stop 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6],[17],[30]   44,499  
Fair value, beginning balance (93) [2],[8],[10] (93) [2],[8],[10] 44,499 [1],[6],[17],[30]
Investment, Identifier [Axis]: Majesco | One stop 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6],[9]   0  
Fair value, beginning balance 73,774 [2],[8] 73,774 [2],[8] 0 [1],[6],[9]
Investment, Identifier [Axis]: Mamba Purchaser, Inc. | Senior secured      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[3],[5],[6]   24,701  
Fair value, beginning balance 14,472 [2],[8],[18],[19],[20] 14,472 [2],[8],[18],[19],[20] 24,701 [1],[3],[5],[6]
Investment, Identifier [Axis]: Marcone Yellowstone Buyer Inc. | One stop 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6],[22]   10,769  
Fair value, beginning balance 11,343 [2],[8],[24] 11,343 [2],[8],[24] 10,769 [1],[6],[22]
Investment, Identifier [Axis]: Marcone Yellowstone Buyer Inc. | One stop 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6],[22]   4,567  
Fair value, beginning balance 4,811 [2],[8],[24] 4,811 [2],[8],[24] 4,567 [1],[6],[22]
Investment, Identifier [Axis]: Mariner Wealth Advisors, LLC | Senior secured      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[5],[6]   12,748  
Fair value, beginning balance 2,988 [2],[18],[20] 2,988 [2],[18],[20] 12,748 [1],[5],[6]
Investment, Identifier [Axis]: Matrix Holding GMBH | One stop 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[4],[6],[31],[43]   190  
Fair value, beginning balance [1],[4],[6],[31],[43]     190
Investment, Identifier [Axis]: Matrix Holding GMBH | One stop 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[4],[6],[31],[43]   20,756  
Fair value, beginning balance [1],[4],[6],[31],[43]     20,756
Investment, Identifier [Axis]: Matrix42 Holding GMBH | One stop 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[8],[15],[29],[44] 182 182  
Investment, Identifier [Axis]: Matrix42 Holding GMBH | One stop 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[8],[15],[29],[44] 19,844 19,844  
Investment, Identifier [Axis]: Maverick Bidco Inc. | Senior secured 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6]   37,062  
Fair value, beginning balance [1],[6]     37,062
Investment, Identifier [Axis]: Maverick Bidco Inc. | Senior secured 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6]   56,372  
Fair value, beginning balance [1],[6]     56,372
Investment, Identifier [Axis]: Maverick Bidco Inc. | Senior secured 3      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6]   4,961  
Fair value, beginning balance [1],[6]     4,961
Investment, Identifier [Axis]: Mavis Tire Express Services Topco, Corp. | Senior secured      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[3],[4],[5],[6]   18,125  
Fair value, beginning balance 16,947 [2],[8],[15],[18],[19],[20] 16,947 [2],[8],[15],[18],[19],[20] 18,125 [1],[3],[4],[5],[6]
Investment, Identifier [Axis]: McAfee, LLC | Senior secured      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[4],[5],[6]   4,755  
Fair value, beginning balance 4,390 [2],[8],[15],[18],[20] 4,390 [2],[8],[15],[18],[20] 4,755 [1],[4],[5],[6]
Investment, Identifier [Axis]: Med Parentco, LP | Senior secured      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[3],[5],[6]   22,470  
Fair value, beginning balance 22,343 [2],[8],[19],[20] 22,343 [2],[8],[19],[20] 22,470 [1],[3],[5],[6]
Investment, Identifier [Axis]: Mediware Information Systems, Inc. | Senior secured      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[3],[5],[6]   25,171  
Fair value, beginning balance 2,736 [2],[18],[20] 2,736 [2],[18],[20] 25,171 [1],[3],[5],[6]
Investment, Identifier [Axis]: Medlar Bidco Limited | One stop 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[4],[6],[11],[31]   35,205  
Fair value, beginning balance 34,496 [2],[8],[13],[15],[29] 34,496 [2],[8],[13],[15],[29] 35,205 [1],[4],[6],[11],[31]
Investment, Identifier [Axis]: Medlar Bidco Limited | One stop 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[4],[6],[9],[11],[31]   0  
Fair value, beginning balance (71) [2],[8],[10],[13],[15],[29] (71) [2],[8],[10],[13],[15],[29] 0 [1],[4],[6],[9],[11],[31]
Investment, Identifier [Axis]: Medlar Bidco Limited | One stop 3      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[4],[6],[11],[31]   43,801  
Fair value, beginning balance 42,363 [2],[8],[13],[15],[29] 42,363 [2],[8],[13],[15],[29] 43,801 [1],[4],[6],[11],[31]
Investment, Identifier [Axis]: Menlo Ridgeview Co-Invest, LLC | LLC interest      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[15] 1,566 1,566  
Investment, Identifier [Axis]: Menlo Ridgeview Co-Invest, LLC | LLC units      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[4]   1,587  
Fair value, beginning balance [1],[4]     1,587
Investment, Identifier [Axis]: Merlin Buyer, Inc. | Senior secured      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[3]   2,513  
Fair value, beginning balance [1],[3]     2,513
Investment, Identifier [Axis]: Metal Supermarkets US Buyer, LLC | LLC interest 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[15],[33] 140 140  
Investment, Identifier [Axis]: Metal Supermarkets US Buyer, LLC | LLC interest 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[15],[33] 20 20  
Investment, Identifier [Axis]: Metal Supermarkets US Buyer, LLC | LLC units      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[4],[48]   132  
Fair value, beginning balance [1],[4],[48]     132
Investment, Identifier [Axis]: Metal Supermarkets US Buyer, LLC | One stop 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[4],[30],[48]   12,326  
Fair value, beginning balance 12,214 [2],[15],[21],[33] 12,214 [2],[15],[21],[33] 12,326 [1],[4],[30],[48]
Investment, Identifier [Axis]: Metal Supermarkets US Buyer, LLC | One stop 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[4],[6],[48]   328  
Fair value, beginning balance 0 [2],[8],[10],[15],[33] 0 [2],[8],[10],[15],[33] 328 [1],[4],[6],[48]
Investment, Identifier [Axis]: Metal Supermarkets US Buyer, LLC | Preferred stock      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[4],[48]   10  
Fair value, beginning balance [1],[4],[48]     10
Investment, Identifier [Axis]: Metatiedot Bidco Oy & Metatiedot US, LLC | One stop 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[8],[15],[29],[49] 13,695 13,695  
Investment, Identifier [Axis]: Metatiedot Bidco Oy & Metatiedot US, LLC | One stop 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[8],[15],[49] 8,978 8,978  
Investment, Identifier [Axis]: Metatiedot Bidco Oy & Metatiedot US, LLC | One stop 3      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[8],[15],[29],[49] 1,223 1,223  
Investment, Identifier [Axis]: Metatiedot Bidco Oy & Metatiedot US, LLC | One stop 4      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[8],[15],[29],[49] 173 173  
Investment, Identifier [Axis]: Metatiedot Bidco Oy Metatiedot US, LLC | One stop 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[4],[6],[31],[50]   14,658  
Fair value, beginning balance [1],[4],[6],[31],[50]     14,658
Investment, Identifier [Axis]: Metatiedot Bidco Oy Metatiedot US, LLC | One stop 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[4],[6],[50]   9,353  
Fair value, beginning balance [1],[4],[6],[50]     9,353
Investment, Identifier [Axis]: Metatiedot Bidco Oy Metatiedot US, LLC | One stop 3      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[4],[6],[31],[50]   119  
Fair value, beginning balance [1],[4],[6],[31],[50]     119
Investment, Identifier [Axis]: Metatiedot Bidco Oy Metatiedot US, LLC | One stop 4      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[4],[6],[9],[31],[50]   0  
Fair value, beginning balance [1],[4],[6],[9],[31],[50]     0
Investment, Identifier [Axis]: Milano Acquisition Corp. | Senior secured      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[3],[5]   4,830  
Fair value, beginning balance 4,795 [2],[18],[19],[20] 4,795 [2],[18],[19],[20] 4,830 [1],[3],[5]
Investment, Identifier [Axis]: Mister Car Wash Holdings, Inc. | Senior secured      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[4],[5],[6]   12,302  
Fair value, beginning balance 11,733 [2],[8],[15],[18],[20] 11,733 [2],[8],[15],[18],[20] 12,302 [1],[4],[5],[6]
Investment, Identifier [Axis]: Modena Buyer, LLC | Senior secured      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[3],[5],[6]   11,793  
Fair value, beginning balance 16,491 [2],[8],[18],[19],[20] 16,491 [2],[8],[18],[19],[20] 11,793 [1],[3],[5],[6]
Investment, Identifier [Axis]: Modernizing Medicine, Inc. | One stop 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6],[22]   127,295  
Fair value, beginning balance 129,479 [2],[7],[8],[24] 129,479 [2],[7],[8],[24] 127,295 [1],[6],[22]
Investment, Identifier [Axis]: Modernizing Medicine, Inc. | One stop 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6],[9]   0  
Fair value, beginning balance 0 [2],[8],[10] 0 [2],[8],[10] 0 [1],[6],[9]
Investment, Identifier [Axis]: Modernizing Medicine, Inc. | Preferred stock      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[42]   15,155  
Fair value, beginning balance 16,486 [2],[41] 16,486 [2],[41] 15,155 [1],[42]
Investment, Identifier [Axis]: Motus Group, LLC | Senior secured      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[5],[6]   8,800  
Fair value, beginning balance 7,427 [2],[8],[18],[20] 7,427 [2],[8],[18],[20] 8,800 [1],[5],[6]
Investment, Identifier [Axis]: Movement Holdings, LLC | One stop 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[4],[17],[25],[30]   22,024  
Fair value, beginning balance 21,857 [2],[7],[15],[21],[26] 21,857 [2],[7],[15],[21],[26] 22,024 [1],[4],[17],[25],[30]
Investment, Identifier [Axis]: Movement Holdings, LLC | One stop 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[4],[6],[9],[25]   0  
Fair value, beginning balance 0 [2],[8],[10],[15],[26] 0 [2],[8],[10],[15],[26] 0 [1],[4],[6],[9],[25]
Investment, Identifier [Axis]: Movement Holdings, LLC | One stop 3      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[4],[6],[9],[25]   0  
Fair value, beginning balance [1],[4],[6],[9],[25]     0
Investment, Identifier [Axis]: NBG Acquisition Corp. and NBG-P Acquisition Corp. | One stop 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6],[22]   14,784  
Fair value, beginning balance [1],[6],[22]     14,784
Investment, Identifier [Axis]: NBG Acquisition Corp. and NBG-P Acquisition Corp. | One stop 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6],[22]   2,640  
Fair value, beginning balance [1],[6],[22]     2,640
Investment, Identifier [Axis]: NBG Acquisition Corp. | One stop 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[8],[24] 13,403 13,403  
Investment, Identifier [Axis]: NBG Acquisition Corp. | One stop 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[8],[24] 2,404 2,404  
Investment, Identifier [Axis]: NSM Top Holdings Corp. | Senior secured      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[3],[6]   3,422  
Fair value, beginning balance 5,768 [2],[8],[18] 5,768 [2],[8],[18] 3,422 [1],[3],[6]
Investment, Identifier [Axis]: National Express Wash Parent Holdco, LLC | One stop 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6],[30]   37,794  
Fair value, beginning balance 80,131 [2],[8],[21],[24] 80,131 [2],[8],[21],[24] 37,794 [1],[6],[30]
Investment, Identifier [Axis]: National Express Wash Parent Holdco, LLC | One stop 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6]   4,572  
Fair value, beginning balance (46) [2],[8],[10] (46) [2],[8],[10] 4,572 [1],[6]
Investment, Identifier [Axis]: National Express Wash Parent Holdco, LLC | One stop 3      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6]   13,734  
Fair value, beginning balance 68 [2],[8],[24] 68 [2],[8],[24] 13,734 [1],[6]
Investment, Identifier [Axis]: National Express Wash Parent Holdco, LLC | One stop 4      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6]   12,152  
Fair value, beginning balance 12,038 [2],[8],[24] 12,038 [2],[8],[24] 12,152 [1],[6]
Investment, Identifier [Axis]: Navex Global Holdings Corporation | LP interest      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2] 3,244 3,244  
Investment, Identifier [Axis]: Navex Global Holdings Corporation | One stop 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[7],[8],[21] 28,078 28,078  
Investment, Identifier [Axis]: Navex Global Holdings Corporation | One stop 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[8],[10] (44) (44)  
Investment, Identifier [Axis]: Navex Global Holdings Corporation | One stop 3      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[8],[10] (57) (57)  
Investment, Identifier [Axis]: Navex TopCo, Inc. | One stop 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6],[17]   22,813  
Fair value, beginning balance [1],[6],[17]     22,813
Investment, Identifier [Axis]: Navex TopCo, Inc. | One stop 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6],[9]   0  
Fair value, beginning balance [1],[6],[9]     0
Investment, Identifier [Axis]: Neptune Holdings, Inc. | One stop 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[30]   5,547  
Fair value, beginning balance 5,450 [2],[21] 5,450 [2],[21] 5,547 [1],[30]
Investment, Identifier [Axis]: Neptune Holdings, Inc. | One stop 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6]   0  
Fair value, beginning balance (1) [2],[8],[10] (1) [2],[8],[10] 0 [1],[6]
Investment, Identifier [Axis]: Netsmart Technologies, Inc. | One stop 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6],[22],[30]   58,423  
Fair value, beginning balance 99,010 [2],[8],[21],[24] 99,010 [2],[8],[21],[24] 58,423 [1],[6],[22],[30]
Investment, Identifier [Axis]: Netsmart Technologies, Inc. | One stop 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6],[9]   0  
Fair value, beginning balance (155) [2],[8],[10] (155) [2],[8],[10] 0 [1],[6],[9]
Investment, Identifier [Axis]: Netsmart Technologies, Inc. | One stop 3      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6],[9]   0  
Fair value, beginning balance (324) [2],[8],[10] (324) [2],[8],[10] 0 [1],[6],[9]
Investment, Identifier [Axis]: Netsmart Technologies, Inc. | One stop 4      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[8],[24] 45,822 45,822  
Investment, Identifier [Axis]: Netwrix Corporation | One stop 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6],[17]   12,456  
Fair value, beginning balance 12,113 [2],[7],[21] 12,113 [2],[7],[21] 12,456 [1],[6],[17]
Investment, Identifier [Axis]: Netwrix Corporation | One stop 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6]   38  
Fair value, beginning balance 35 [2],[8] 35 [2],[8] 38 [1],[6]
Investment, Identifier [Axis]: Neuberger Berman CLO 32R, Ltd. | Structured Finance Note      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[4],[12],[27]   5,555  
Fair value, beginning balance 735 [2],[14],[15],[16],[20] 735 [2],[14],[15],[16],[20] 5,555 [1],[4],[12],[27]
Investment, Identifier [Axis]: New Look Corporation and New Look Vision Group Inc. | One stop      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[4],[6],[22],[31],[48]   10,829  
Fair value, beginning balance [1],[4],[6],[22],[31],[48]     10,829
Investment, Identifier [Axis]: New Look Corporation | One stop      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[8],[15],[29],[33] 10,539 10,539  
Investment, Identifier [Axis]: North Haven Stack Buyer, LLC | One stop      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[17]   10,776  
Fair value, beginning balance [1],[17]     10,776
Investment, Identifier [Axis]: North Haven Stack Buyer, LLC | Second lien      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6],[22]   9,255  
Fair value, beginning balance [1],[6],[22]     9,255
Investment, Identifier [Axis]: OCP CLO 2025-44, Ltd. | Structured Finance Note      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[4],[12],[27]   4,043  
Fair value, beginning balance 4,019 [2],[14],[15],[16] 4,019 [2],[14],[15],[16] 4,043 [1],[4],[12],[27]
Investment, Identifier [Axis]: OEConnection, LLC | One stop 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6]   40,577  
Fair value, beginning balance 53,446 [2],[8],[21] 53,446 [2],[8],[21] 40,577 [1],[6]
Investment, Identifier [Axis]: OEConnection, LLC | One stop 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6]   7,080  
Fair value, beginning balance 20 [2],[8],[10] 20 [2],[8],[10] 7,080 [1],[6]
Investment, Identifier [Axis]: OEConnection, LLC | One stop 3      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6],[9]   15  
Fair value, beginning balance 40 [2],[8],[10] 40 [2],[8],[10] 15 [1],[6],[9]
Investment, Identifier [Axis]: OEConnection, LLC | One stop 4      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6],[9]   24  
Fair value, beginning balance [1],[6],[9]     24
Investment, Identifier [Axis]: OHA Credit Funding 22, Ltd. | Structured Finance Note      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[4],[12],[27]   2,527  
Fair value, beginning balance 2,502 [2],[14],[15],[16] 2,502 [2],[14],[15],[16] 2,527 [1],[4],[12],[27]
Investment, Identifier [Axis]: OHA Credit Partners VII, Ltd. | Structured Finance Note      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[4],[5],[12],[27]   2,011  
Fair value, beginning balance [1],[4],[5],[12],[27]     2,011
Investment, Identifier [Axis]: OMNIA Partners, LLC | Senior secured      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[3],[5],[6]   9,013  
Fair value, beginning balance 3,956 [2],[8],[18],[19],[20] 3,956 [2],[8],[18],[19],[20] 9,013 [1],[3],[5],[6]
Investment, Identifier [Axis]: OSP Hamilton Purchaser, LLC | One stop 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[17]   2,776  
Fair value, beginning balance 2,699 [2],[7] 2,699 [2],[7] 2,776 [1],[17]
Investment, Identifier [Axis]: OSP Hamilton Purchaser, LLC | One stop 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6]   2,655  
Fair value, beginning balance 2,582 [2],[21] 2,582 [2],[21] 2,655 [1],[6]
Investment, Identifier [Axis]: OSP Hamilton Purchaser, LLC | One stop 3      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6]   695  
Fair value, beginning balance 658 [2],[8] 658 [2],[8] 695 [1],[6]
Investment, Identifier [Axis]: OSP Hamilton Purchaser, LLC | One stop 4      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6]   130  
Fair value, beginning balance 6,505 [2],[8] 6,505 [2],[8] 130 [1],[6]
Investment, Identifier [Axis]: OSTTRA Group, Ltd. | Senior secured      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[3],[4],[5],[25]   11,673  
Fair value, beginning balance 13,849 [2],[15],[18],[19],[20],[26] 13,849 [2],[15],[18],[19],[20],[26] 11,673 [1],[3],[4],[5],[25]
Investment, Identifier [Axis]: Oakbridge Insurance Agency LLC | One stop 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6],[17]   6,530  
Fair value, beginning balance 6,424 [2],[7],[8] 6,424 [2],[7],[8] 6,530 [1],[6],[17]
Investment, Identifier [Axis]: Oakbridge Insurance Agency LLC | One stop 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6]   3,154  
Fair value, beginning balance 3,102 [2],[8] 3,102 [2],[8] 3,154 [1],[6]
Investment, Identifier [Axis]: Oakbridge Insurance Agency LLC | One stop 3      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6]   39  
Fair value, beginning balance 71 [2],[8] 71 [2],[8] 39 [1],[6]
Investment, Identifier [Axis]: Oakbridge Insurance Agency LLC | One stop 4      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6]   1,874  
Fair value, beginning balance 6,390 [2],[8] 6,390 [2],[8] 1,874 [1],[6]
Investment, Identifier [Axis]: Oakbridge Insurance Agency LLC | One stop 5      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[8],[10] (88) (88)  
Investment, Identifier [Axis]: Obelix Parent, Inc. | One stop 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[8],[10] 0 0  
Investment, Identifier [Axis]: Obelix Parent, Inc. | One stop 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[8] 53,582 53,582  
Investment, Identifier [Axis]: Olo Parent, Inc. | One stop 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6],[9]   (21)  
Fair value, beginning balance (167) [2],[8],[10] (167) [2],[8],[10] (21) [1],[6],[9]
Investment, Identifier [Axis]: Olo Parent, Inc. | One stop 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6]   87,552  
Fair value, beginning balance 89,212 [2],[8],[21] 89,212 [2],[8],[21] 87,552 [1],[6]
Investment, Identifier [Axis]: OneDigital Borrower LLC | Senior secured      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[3],[5],[6]   18,399  
Fair value, beginning balance 17,716 [2],[8],[18],[20] 17,716 [2],[8],[18],[20] 18,399 [1],[3],[5],[6]
Investment, Identifier [Axis]: Onit, Inc. | One stop 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6]   18,809  
Fair value, beginning balance 18,248 [2],[8],[21] 18,248 [2],[8],[21] 18,809 [1],[6]
Investment, Identifier [Axis]: Onit, Inc. | One stop 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6],[9]   0  
Fair value, beginning balance (69) [2],[8],[10] (69) [2],[8],[10] 0 [1],[6],[9]
Investment, Identifier [Axis]: Onit, Inc. | One stop 3      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6],[9]   0  
Fair value, beginning balance (207) [2],[8],[10] (207) [2],[8],[10] 0 [1],[6],[9]
Investment, Identifier [Axis]: Onit, Inc. | One stop 4      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6]   3,155  
Fair value, beginning balance 3,044 [2],[8] 3,044 [2],[8] 3,155 [1],[6]
Investment, Identifier [Axis]: Onward Acquireco, Inc. | One stop 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[8],[24] 312 312  
Investment, Identifier [Axis]: Onward Acquireco, Inc. | One stop 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[8] 0 0  
Investment, Identifier [Axis]: Onward Acquireco, Inc. | One stop 3      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[8],[10] (1) (1)  
Investment, Identifier [Axis]: Orion Advisor Solutions | Senior secured      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[3],[5],[6]   24,139  
Fair value, beginning balance 23,665 [2],[8],[18],[19],[20] 23,665 [2],[8],[18],[19],[20] 24,139 [1],[3],[5],[6]
Investment, Identifier [Axis]: Orion CLO 2023-2, Ltd. | Structured Finance Note      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[13],[14],[15] 4,440 4,440  
Investment, Identifier [Axis]: Orion CLO 2025-5, Ltd. | Structured Finance Note      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[4],[12],[27]   4,044  
Fair value, beginning balance 4,013 [2],[14],[15],[16] 4,013 [2],[14],[15],[16] 4,044 [1],[4],[12],[27]
Investment, Identifier [Axis]: Orion CLO 2025-6 Ltd. | Structured Finance Note      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[4],[27]   4,039  
Fair value, beginning balance 4,010 [2],[14],[15],[16] 4,010 [2],[14],[15],[16] 4,039 [1],[4],[27]
Investment, Identifier [Axis]: Orsay Bidco B.V. and Sky Group Holding B.V. | One stop 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[4],[6],[31],[51]   10,182  
Fair value, beginning balance [1],[4],[6],[31],[51]     10,182
Investment, Identifier [Axis]: Orsay Bidco B.V. and Sky Group Holding B.V. | One stop 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[4],[6],[31],[51]   736  
Fair value, beginning balance [1],[4],[6],[31],[51]     736
Investment, Identifier [Axis]: Outcomes Group Holdings, Inc. | Senior secured      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[3],[5],[6]   15,027  
Fair value, beginning balance 14,873 [2],[8],[18],[20] 14,873 [2],[8],[18],[20] 15,027 [1],[3],[5],[6]
Investment, Identifier [Axis]: PAS Parent Inc. | One stop 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6],[17],[30]   21,968  
Fair value, beginning balance 22,082 [2],[7],[8],[21] 22,082 [2],[7],[8],[21] 21,968 [1],[6],[17],[30]
Investment, Identifier [Axis]: PAS Parent Inc. | One stop 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6],[9]   (19)  
Fair value, beginning balance 0 [2],[8],[10] 0 [2],[8],[10] (19) [1],[6],[9]
Investment, Identifier [Axis]: PAS Parent Inc. | One stop 3      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6],[9]   (181)  
Fair value, beginning balance 48 [2],[8],[10] 48 [2],[8],[10] (181) [1],[6],[9]
Investment, Identifier [Axis]: PB Group Holdings, LLC | LP interest      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2] 214 214  
Investment, Identifier [Axis]: PB Group Holdings, LLC | One stop 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6],[22],[30]   33,268  
Fair value, beginning balance 33,724 [2],[8],[21],[24] 33,724 [2],[8],[21],[24] 33,268 [1],[6],[22],[30]
Investment, Identifier [Axis]: PB Group Holdings, LLC | One stop 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6]   454  
Fair value, beginning balance 2,530 [2],[8] 2,530 [2],[8] 454 [1],[6]
Investment, Identifier [Axis]: PB Group Holdings, LLC | Preferred stock      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1]   279  
Fair value, beginning balance [1]     279
Investment, Identifier [Axis]: PDQ Intermediate, Inc. | Subordinated debt      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6],[22]   66  
Fair value, beginning balance [1],[6],[22]     66
Investment, Identifier [Axis]: PDQ.com Corporation | One stop 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[8],[10] (22) (22)  
Investment, Identifier [Axis]: PDQ.com Corporation | One stop 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[8] 5,526 5,526  
Investment, Identifier [Axis]: PDQ.com Corporation | One stop 3      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[8] 196 196  
Investment, Identifier [Axis]: PFI Lower MidCo, LLC | Senior secured      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[18],[19],[20] 8,024 8,024  
Investment, Identifier [Axis]: PGA Holdings, Inc. | Senior secured      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[3],[5],[6]   25,734  
Fair value, beginning balance [1],[3],[5],[6]     25,734
Investment, Identifier [Axis]: PING Identity Holding Corp. | Senior secured      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[18],[19],[20] 9,734 9,734  
Investment, Identifier [Axis]: PODS, LLC | Senior secured      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[3],[5]   2,936  
Fair value, beginning balance [1],[3],[5]     2,936
Investment, Identifier [Axis]: POY Holdings, LLC | LLC interest      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2] 74 74  
Investment, Identifier [Axis]: PPV Intermediate Holdings, LLC | One stop 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[17]   4,938  
Fair value, beginning balance 4,802 [2],[7] 4,802 [2],[7] 4,938 [1],[17]
Investment, Identifier [Axis]: PPV Intermediate Holdings, LLC | One stop 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6]   4,472  
Fair value, beginning balance 4,297 [2],[8] 4,297 [2],[8] 4,472 [1],[6]
Investment, Identifier [Axis]: PPW Aero Buyer, Inc. | One stop 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6],[9]   (9)  
Fair value, beginning balance 639 [2],[8] 639 [2],[8] (9) [1],[6],[9]
Investment, Identifier [Axis]: PPW Aero Buyer, Inc. | One stop 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6]   1,692  
Fair value, beginning balance 1,681 [2],[7] 1,681 [2],[7] 1,692 [1],[6]
Investment, Identifier [Axis]: PPW Aero Buyer, Inc. | One stop 3      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6],[9]   (28)  
Fair value, beginning balance 591 [2],[8] 591 [2],[8] (28) [1],[6],[9]
Investment, Identifier [Axis]: PSC Parent, Inc. | One stop 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6]   1,439  
Fair value, beginning balance 1,417 [2],[8] 1,417 [2],[8] 1,439 [1],[6]
Investment, Identifier [Axis]: PSC Parent, Inc. | One stop 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6]   240  
Fair value, beginning balance 236 [2],[8] 236 [2],[8] 240 [1],[6]
Investment, Identifier [Axis]: PSC Parent, Inc. | One stop 3      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6]   89  
Fair value, beginning balance 122 [2],[8] 122 [2],[8] 89 [1],[6]
Investment, Identifier [Axis]: PSC Parent, Inc. | One stop 4      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6]   159  
Fair value, beginning balance 340 [2],[8] 340 [2],[8] 159 [1],[6]
Investment, Identifier [Axis]: Packaging Coordinators Midco, Inc. | One stop 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6]   28,004  
Fair value, beginning balance 32,822 [2],[7],[8] 32,822 [2],[7],[8] 28,004 [1],[6]
Investment, Identifier [Axis]: Packaging Coordinators Midco, Inc. | One stop 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6],[9]   0  
Fair value, beginning balance (72) [2],[8],[10] (72) [2],[8],[10] 0 [1],[6],[9]
Investment, Identifier [Axis]: Packaging Coordinators Midco, Inc. | One stop 3      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6]   0  
Fair value, beginning balance (102) [2],[8],[10] (102) [2],[8],[10] 0 [1],[6]
Investment, Identifier [Axis]: Packaging Coordinators Midco, Inc. | One stop 4      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6]   0  
Fair value, beginning balance 617 [2],[8] 617 [2],[8] 0 [1],[6]
Investment, Identifier [Axis]: Packaging Coordinators Midco, Inc. | One stop 5      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6]   0  
Fair value, beginning balance (29) [2],[8],[10] (29) [2],[8],[10] 0 [1],[6]
Investment, Identifier [Axis]: Packaging Coordinators Midco, Inc. | One stop 6      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6]   0  
Fair value, beginning balance (30) [2],[8],[10] (30) [2],[8],[10] 0 [1],[6]
Investment, Identifier [Axis]: Packaging Coordinators Midco, Inc. | One stop 7      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6]   0  
Fair value, beginning balance 16,033 [2],[8],[29] 16,033 [2],[8],[29] 0 [1],[6]
Investment, Identifier [Axis]: Packaging Coordinators Midco, Inc. | One stop 8      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6]   0  
Fair value, beginning balance [1],[6]     0
Investment, Identifier [Axis]: Paint Intermediate III, LLC | Senior secured      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[3],[5],[6]   13,940  
Fair value, beginning balance 3,495 [2],[18],[20] 3,495 [2],[18],[20] 13,940 [1],[3],[5],[6]
Investment, Identifier [Axis]: Palmer Square CLO 2019-1, Ltd. | Structured Finance Note      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[4],[27]   3,017  
Fair value, beginning balance 2,916 [2],[14],[15],[16] 2,916 [2],[14],[15],[16] 3,017 [1],[4],[27]
Investment, Identifier [Axis]: Palmer Square CLO 2021-3, Ltd. | Structured Finance Note      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[4],[12],[27]   4,548  
Fair value, beginning balance 4,397 [2],[14],[15],[16],[20] 4,397 [2],[14],[15],[16],[20] 4,548 [1],[4],[12],[27]
Investment, Identifier [Axis]: Palmer Square CLO 2023-3, Ltd. | Structured Finance Note      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[14],[15],[16] 3,922 3,922  
Investment, Identifier [Axis]: Panzura, LLC | LLC interest      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2] 0 0  
Investment, Identifier [Axis]: Panzura, LLC | LLC units      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1]   0  
Fair value, beginning balance [1]     0
Investment, Identifier [Axis]: Panzura, LLC | One stop      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6],[22]   60  
Fair value, beginning balance 63 [2],[8],[24],[34] 63 [2],[8],[24],[34] 60 [1],[6],[22]
Investment, Identifier [Axis]: Pareto Health Intermediate Holdings, Inc. | One stop 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[8] 0 0  
Investment, Identifier [Axis]: Pareto Health Intermediate Holdings, Inc. | One stop 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[8] 456 456  
Investment, Identifier [Axis]: Particle Investments | Senior secured      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6]   3,002  
Fair value, beginning balance [1],[6]     3,002
Investment, Identifier [Axis]: Pathway Vet Alliance, LLC | Senior secured      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[3],[5]   5,060  
Fair value, beginning balance 5,020 [2],[18],[19],[20] 5,020 [2],[18],[19],[20] 5,060 [1],[3],[5]
Investment, Identifier [Axis]: Patriot Acquireco, LLC | Common stock      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2] 3,729 3,729  
Investment, Identifier [Axis]: Patriot Acquireco, LLC | LP units      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1]   3,613  
Fair value, beginning balance [1]     3,613
Investment, Identifier [Axis]: Patriot Acquireco, LLC | One stop 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6]   1,164  
Fair value, beginning balance 1,206 [2],[8] 1,206 [2],[8] 1,164 [1],[6]
Investment, Identifier [Axis]: Patriot Acquireco, LLC | One stop 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6]   83,996  
Fair value, beginning balance 83,785 [2],[8] 83,785 [2],[8] 83,996 [1],[6]
Investment, Identifier [Axis]: Peace Park CLO, Ltd. | Structured Finance Note      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[4],[27]   3,922  
Fair value, beginning balance 3,817 [2],[14],[15],[16] 3,817 [2],[14],[15],[16] 3,922 [1],[4],[27]
Investment, Identifier [Axis]: Pearl Acquisition Buyer, Inc. | One stop 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[8] 231 231  
Investment, Identifier [Axis]: Pearl Acquisition Buyer, Inc. | One stop 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[8] 7,077 7,077  
Investment, Identifier [Axis]: Pearl Acquisition Buyer, Inc. | One stop 3      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[8],[10] (5) (5)  
Investment, Identifier [Axis]: Pegasus BidCo | Senior secured      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[4],[6],[51]   17,391  
Fair value, beginning balance [1],[4],[6],[51]     17,391
Investment, Identifier [Axis]: People Corporation | One stop      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[8],[10],[15],[29],[33] 26 26  
Investment, Identifier [Axis]: Personify, Inc. | One stop 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6],[30]   17,891  
Fair value, beginning balance [1],[6],[30]     17,891
Investment, Identifier [Axis]: Personify, Inc. | One stop 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[17]   6,648  
Fair value, beginning balance [1],[17]     6,648
Investment, Identifier [Axis]: PetVet Care Centers LLC | One stop 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6]   8,499  
Fair value, beginning balance 8,068 [2],[8] 8,068 [2],[8] 8,499 [1],[6]
Investment, Identifier [Axis]: PetVet Care Centers LLC | One stop 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6],[9]   (95)  
Fair value, beginning balance 284 [2],[8] 284 [2],[8] (95) [1],[6],[9]
Investment, Identifier [Axis]: PetVet Care Centers LLC | One stop 3      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6],[9]   0  
Fair value, beginning balance [1],[6],[9]     0
Investment, Identifier [Axis]: Pharmerica | Senior secured      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[5],[6]   12,332  
Fair value, beginning balance [1],[5],[6]     12,332
Investment, Identifier [Axis]: Pike Corporation | Senior secured      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[4],[5],[6]   10,561  
Fair value, beginning balance [1],[4],[5],[6]     10,561
Investment, Identifier [Axis]: Pikes Peak CLO 15 (2023), Ltd. | Structured Finance Note      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[13],[14],[15] 2,328 2,328  
Investment, Identifier [Axis]: Pikes Peak CLO 9 | Structured Finance Note      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[4],[12],[27]   5,048  
Fair value, beginning balance 4,861 [2],[14],[15],[16] 4,861 [2],[14],[15],[16] 5,048 [1],[4],[12],[27]
Investment, Identifier [Axis]: Pineapple German Bidco GMBH | One stop 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[4],[6],[22],[31],[43]   21,242  
Fair value, beginning balance 20,213 [2],[8],[15],[24],[29],[44] 20,213 [2],[8],[15],[24],[29],[44] 21,242 [1],[4],[6],[22],[31],[43]
Investment, Identifier [Axis]: Pineapple German Bidco GMBH | One stop 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[4],[6],[22],[43]   16,990  
Fair value, beginning balance 16,612 [2],[8],[15],[24],[44] 16,612 [2],[8],[15],[24],[44] 16,990 [1],[4],[6],[22],[43]
Investment, Identifier [Axis]: Pineapple German Bidco GMBH | One stop 3      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[4],[6],[22],[31],[43]   6,583  
Fair value, beginning balance 6,264 [2],[8],[15],[24],[29],[44] 6,264 [2],[8],[15],[24],[29],[44] 6,583 [1],[4],[6],[22],[31],[43]
Investment, Identifier [Axis]: Pineapple German Bidco GMBH | One stop 4      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[4],[6],[22],[31],[43]   5,985  
Fair value, beginning balance 5,260 [2],[8],[15],[24],[29],[44] 5,260 [2],[8],[15],[24],[29],[44] 5,985 [1],[4],[6],[22],[31],[43]
Investment, Identifier [Axis]: Pineapple German Bidco GMBH | One stop 5      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[4],[6],[22],[43]   1,434  
Fair value, beginning balance 1,402 [2],[8],[15],[24],[44] 1,402 [2],[8],[15],[24],[44] 1,434 [1],[4],[6],[22],[43]
Investment, Identifier [Axis]: Pineapple German Bidco GMBH | One stop 6      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[4],[6],[22],[31],[43]   1,458  
Fair value, beginning balance 1,387 [2],[8],[15],[24],[29],[44] 1,387 [2],[8],[15],[24],[29],[44] 1,458 [1],[4],[6],[22],[31],[43]
Investment, Identifier [Axis]: Pineapple German Bidco GMBH | One stop 7      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[4],[6],[9],[31],[43]   0  
Fair value, beginning balance (1,134) [2],[8],[10],[15],[29],[44] (1,134) [2],[8],[10],[15],[29],[44] 0 [1],[4],[6],[9],[31],[43]
Investment, Identifier [Axis]: Pinnacle Treatment Centers, Inc. | One stop 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[17],[30]   19,271  
Fair value, beginning balance 18,918 [2],[7],[21] 18,918 [2],[7],[21] 19,271 [1],[17],[30]
Investment, Identifier [Axis]: Pinnacle Treatment Centers, Inc. | One stop 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6]   16,983  
Fair value, beginning balance 16,678 [2],[8] 16,678 [2],[8] 16,983 [1],[6]
Investment, Identifier [Axis]: Pinnacle Treatment Centers, Inc. | One stop 3      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[30]   8,303  
Fair value, beginning balance 8,156 [2],[21] 8,156 [2],[21] 8,303 [1],[30]
Investment, Identifier [Axis]: Pinnacle Treatment Centers, Inc. | One stop 4      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[30]   1,731  
Fair value, beginning balance 1,700 [2],[21] 1,700 [2],[21] 1,731 [1],[30]
Investment, Identifier [Axis]: Pinnacle Treatment Centers, Inc. | One stop 5      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6]   1,579  
Fair value, beginning balance 2,475 [2],[8] 2,475 [2],[8] 1,579 [1],[6]
Investment, Identifier [Axis]: Pinnacle Treatment Centers, Inc. | One stop 6      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[30]   1,074  
Fair value, beginning balance 1,055 [2],[21] 1,055 [2],[21] 1,074 [1],[30]
Investment, Identifier [Axis]: Pinnacle Treatment Centers, Inc. | One stop 7      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6]   812  
Fair value, beginning balance 798 [2],[7] 798 [2],[7] 812 [1],[6]
Investment, Identifier [Axis]: Planview Parent, Inc. | Senior secured      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[3],[5],[6]   21,623  
Fair value, beginning balance 18,803 [2],[8],[18],[19],[20] 18,803 [2],[8],[18],[19],[20] 21,623 [1],[3],[5],[6]
Investment, Identifier [Axis]: Pluralsight, LLC | Common stock      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1]   1,055  
Fair value, beginning balance [1]     1,055
Investment, Identifier [Axis]: Pluralsight, LLC | LLC interest      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2] 0 0  
Investment, Identifier [Axis]: Pluralsight, LLC | One stop 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6],[22]   2,004  
Fair value, beginning balance 512 [2],[8],[24],[34] 512 [2],[8],[24],[34] 2,004 [1],[6],[22]
Investment, Identifier [Axis]: Pluralsight, LLC | One stop 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6],[22]   1,197  
Fair value, beginning balance 1,155 [2],[8],[24] 1,155 [2],[8],[24] 1,197 [1],[6],[22]
Investment, Identifier [Axis]: Pluralsight, LLC | One stop 3      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6],[22]   598  
Fair value, beginning balance 578 [2],[8],[24] 578 [2],[8],[24] 598 [1],[6],[22]
Investment, Identifier [Axis]: Pluralsight, LLC | One stop 4      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6],[9]   (3)  
Fair value, beginning balance (15) [2],[8],[10] (15) [2],[8],[10] (3) [1],[6],[9]
Investment, Identifier [Axis]: Pluralsight, LLC | One stop 5      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6],[9]   (7)  
Fair value, beginning balance (37) [2],[8],[10] (37) [2],[8],[10] (7) [1],[6],[9]
Investment, Identifier [Axis]: PointClickCare Technologies, Inc. | Senior secured      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[4],[5],[6],[48]   19,961  
Fair value, beginning balance [1],[4],[5],[6],[48]     19,961
Investment, Identifier [Axis]: Power Grid Holdings, Inc. | One stop 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6]   656  
Fair value, beginning balance [1],[6]     656
Investment, Identifier [Axis]: Power Grid Holdings, Inc. | One stop 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6]   15  
Fair value, beginning balance [1],[6]     15
Investment, Identifier [Axis]: Precision Medicine Group, LLC | Senior secured      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[3],[5]   18,405  
Fair value, beginning balance 19,245 [2],[18],[19],[20] 19,245 [2],[18],[19],[20] 18,405 [1],[3],[5]
Investment, Identifier [Axis]: Premise Health Holding Corp. | One stop 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6]   29,313  
Fair value, beginning balance 28,822 [2],[7],[8] 28,822 [2],[7],[8] 29,313 [1],[6]
Investment, Identifier [Axis]: Premise Health Holding Corp. | One stop 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6],[9]   0  
Fair value, beginning balance (37) [2],[8],[10] (37) [2],[8],[10] 0 [1],[6],[9]
Investment, Identifier [Axis]: Premise Health Holding Corp. | One stop 3      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[8] 6,151 6,151  
Investment, Identifier [Axis]: Premise Health Holding Corp. | One stop 4      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[8] 1,548 1,548  
Investment, Identifier [Axis]: Premise Health Holding Corp. | One stop 5      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[8] 8,788 8,788  
Investment, Identifier [Axis]: Project Alpha Intermediate Holdings, Inc. | Senior secured      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[3],[5],[6]   16,159  
Fair value, beginning balance 14,568 [2],[8],[18],[19],[20] 14,568 [2],[8],[18],[19],[20] 16,159 [1],[3],[5],[6]
Investment, Identifier [Axis]: Proofpoint, Inc. | Senior secured      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[3],[5],[6]   27,735  
Fair value, beginning balance 26,487 [2],[8],[18],[19],[20] 26,487 [2],[8],[18],[19],[20] 27,735 [1],[3],[5],[6]
Investment, Identifier [Axis]: Propulsion Newco LLC | Senior secured      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[4],[5],[6]   14,231  
Fair value, beginning balance [1],[4],[5],[6]     14,231
Investment, Identifier [Axis]: Provenance Buyer LLC | One stop 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[17]   7,259  
Fair value, beginning balance 7,350 [2],[7] 7,350 [2],[7] 7,259 [1],[17]
Investment, Identifier [Axis]: Provenance Buyer LLC | One stop 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[17]   3,721  
Fair value, beginning balance 3,767 [2],[7] 3,767 [2],[7] 3,721 [1],[17]
Investment, Identifier [Axis]: QAD, Inc. | One stop      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[17]   9,747  
Fair value, beginning balance 9,478 [2],[7] 9,478 [2],[7] 9,747 [1],[17]
Investment, Identifier [Axis]: QF Holdings, Inc. | One stop 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[8] 629 629  
Investment, Identifier [Axis]: QF Holdings, Inc. | One stop 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[8] 83,563 83,563  
Investment, Identifier [Axis]: QF Holdings, Inc. | One stop 3      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[8],[10] (275) (275)  
Investment, Identifier [Axis]: QSR Acquisition Co. | One stop 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[30]   15,254  
Fair value, beginning balance 14,761 [2],[21] 14,761 [2],[21] 15,254 [1],[30]
Investment, Identifier [Axis]: QSR Acquisition Co. | One stop 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6],[9]   0  
Fair value, beginning balance (34) [2],[8],[10] (34) [2],[8],[10] 0 [1],[6],[9]
Investment, Identifier [Axis]: QSR Acquisition Co. | One stop 3      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6],[9]   0  
Fair value, beginning balance (85) [2],[8],[10] (85) [2],[8],[10] 0 [1],[6],[9]
Investment, Identifier [Axis]: Quick Quack Car Wash Holdings, LLC | LLC interest      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2] 113 113  
Investment, Identifier [Axis]: Quick Quack Car Wash Holdings, LLC | LLC units      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1]   547  
Fair value, beginning balance [1]     547
Investment, Identifier [Axis]: Quick Quack Car Wash Holdings, LLC | LP interest      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2] 572 572  
Investment, Identifier [Axis]: Quick Quack Car Wash Holdings, LLC | One stop 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[30]   2,490  
Fair value, beginning balance 2,471 [2],[21] 2,471 [2],[21] 2,490 [1],[30]
Investment, Identifier [Axis]: Quick Quack Car Wash Holdings, LLC | One stop 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6]   140  
Fair value, beginning balance 139 [2],[8] 139 [2],[8] 140 [1],[6]
Investment, Identifier [Axis]: Quick Quack Car Wash Holdings, LLC | One stop 3      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6],[9]   0  
Fair value, beginning balance 0 [2],[8],[10] 0 [2],[8],[10] 0 [1],[6],[9]
Investment, Identifier [Axis]: Quick Quack Car Wash Holdings, LLC | One stop 4      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6]   1,024  
Fair value, beginning balance 1,124 [2],[8] 1,124 [2],[8] 1,024 [1],[6]
Investment, Identifier [Axis]: Quick Quack Car Wash Holdings, LLC | One stop 5      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6]   128  
Fair value, beginning balance 3,988 [2],[7],[8] 3,988 [2],[7],[8] 128 [1],[6]
Investment, Identifier [Axis]: Quick Quack Car Wash Holdings, LLC | Preferred stock      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1]   104  
Fair value, beginning balance [1]     104
Investment, Identifier [Axis]: RC Buyer, Inc. | Senior secured      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[5],[6]   9,294  
Fair value, beginning balance 2,956 [2],[18],[20] 2,956 [2],[18],[20] 9,294 [1],[5],[6]
Investment, Identifier [Axis]: RJW Group Holdings, Inc. | One stop 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6]   49,298  
Fair value, beginning balance 49,352 [2],[7],[8],[21] 49,352 [2],[7],[8],[21] 49,298 [1],[6]
Investment, Identifier [Axis]: RJW Group Holdings, Inc. | One stop 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6]   3,108  
Fair value, beginning balance 3,112 [2],[8] 3,112 [2],[8] 3,108 [1],[6]
Investment, Identifier [Axis]: RJW Group Holdings, Inc. | One stop 3      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6]   52,596  
Fair value, beginning balance 52,655 [2],[7],[8] 52,655 [2],[7],[8] 52,596 [1],[6]
Investment, Identifier [Axis]: RJW Group Holdings, Inc. | One stop 4      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6],[9]   (90)  
Fair value, beginning balance (80) [2],[8],[10] (80) [2],[8],[10] (90) [1],[6],[9]
Investment, Identifier [Axis]: RTI Surgical, Inc. | One stop 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6],[9]   (58)  
Fair value, beginning balance (53) [2],[8],[10] (53) [2],[8],[10] (58) [1],[6],[9]
Investment, Identifier [Axis]: RTI Surgical, Inc. | One stop 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6]   58,084  
Fair value, beginning balance 57,820 [2],[8],[21] 57,820 [2],[8],[21] 58,084 [1],[6]
Investment, Identifier [Axis]: RW AM Holdco LLC      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance   0  
Gross additions   2,744  
Gross reductions   0  
Net change in unrealized appreciation (depreciation)   (113)  
Net realized gain (loss) on investment transactions   0  
Fair value, beginning balance 2,631 2,631 0
Interest, dividend and fee income   5  
Investment, Identifier [Axis]: RW AM Holdco LLC | One stop      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6]   7,774  
Fair value, beginning balance [1],[6]     7,774
Investment, Identifier [Axis]: RW AM Holdco, LLC | LLC interest 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2] 1,129 1,129  
Investment, Identifier [Axis]: RW AM Holdco, LLC | LLC interest 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2] 300 300  
Investment, Identifier [Axis]: RW AM Holdco, LLC | One stop 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[8],[24],[34] 582 582  
Investment, Identifier [Axis]: RW AM Holdco, LLC | One stop 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[8],[24] 620 620  
Investment, Identifier [Axis]: Radiance Borrower, LLC | One stop 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6],[22],[30]   41,498  
Fair value, beginning balance 41,292 [2],[8],[21],[24] 41,292 [2],[8],[21],[24] 41,498 [1],[6],[22],[30]
Investment, Identifier [Axis]: Radiance Borrower, LLC | One stop 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6]   388  
Fair value, beginning balance 388 [2],[8] 388 [2],[8] 388 [1],[6]
Investment, Identifier [Axis]: Radwell Parent, LLC | One stop 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[17]   15,597  
Fair value, beginning balance 15,442 [2],[7],[8] 15,442 [2],[7],[8] 15,597 [1],[17]
Investment, Identifier [Axis]: Radwell Parent, LLC | One stop 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6]   1,222  
Fair value, beginning balance 1,167 [2],[8] 1,167 [2],[8] 1,222 [1],[6]
Investment, Identifier [Axis]: Radwell Parent, LLC | One stop 3      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[8] 85 85  
Investment, Identifier [Axis]: Radwell Parent, LLC | One stop 4      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[8] 20 20  
Investment, Identifier [Axis]: Radwell Parent, LLC | One stop 5      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[8] 4 4  
Investment, Identifier [Axis]: Rainforest Bidco Limited | One stop      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[4],[6],[9],[25],[31]   0  
Fair value, beginning balance (174) [2],[8],[10],[15],[26],[29] (174) [2],[8],[10],[15],[26],[29] 0 [1],[4],[6],[9],[25],[31]
Investment, Identifier [Axis]: Ranpak Corporation | Senior secured 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[3],[4],[6]   3,649  
Fair value, beginning balance 3,604 [2],[8],[15],[18] 3,604 [2],[8],[15],[18] 3,649 [1],[3],[4],[6]
Investment, Identifier [Axis]: Ranpak Corporation | Senior secured 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[3],[4],[6]   2,336  
Fair value, beginning balance 2,306 [2],[8],[15],[18] 2,306 [2],[8],[15],[18] 2,336 [1],[3],[4],[6]
Investment, Identifier [Axis]: RealTruck Group, Inc. | Senior secured      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[4],[5],[6]   9,276  
Fair value, beginning balance [1],[4],[5],[6]     9,276
Investment, Identifier [Axis]: RealTruck Group, Inc. | Senior secured 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[8],[15],[18],[20] 6,320 6,320  
Investment, Identifier [Axis]: RealTruck Group, Inc. | Senior secured 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[8],[15],[18] 2,341 2,341  
Investment, Identifier [Axis]: Relativity Intermediate Holdco, LLC | Senior secured      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[19] 1,958 1,958  
Investment, Identifier [Axis]: ReliaQuest Holdings, LLC | One stop 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6],[22]   41,461  
Fair value, beginning balance 42,279 [2],[8],[24] 42,279 [2],[8],[24] 41,461 [1],[6],[22]
Investment, Identifier [Axis]: ReliaQuest Holdings, LLC | One stop 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6],[9]   0  
Fair value, beginning balance (17) [2],[8],[10] (17) [2],[8],[10] 0 [1],[6],[9]
Investment, Identifier [Axis]: ReliaQuest Holdings, LLC | One stop 3      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6],[9]   0  
Fair value, beginning balance (49) [2],[8],[10] (49) [2],[8],[10] 0 [1],[6],[9]
Investment, Identifier [Axis]: ReliaQuest Holdings, LLC | One stop 4      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6],[22]   57,364  
Fair value, beginning balance 58,496 [2],[8],[24] 58,496 [2],[8],[24] 57,364 [1],[6],[22]
Investment, Identifier [Axis]: Resonetics, LLC | Senior secured      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[3],[5],[6]   23,065  
Fair value, beginning balance 12,735 [2],[18],[19],[20] 12,735 [2],[18],[19],[20] 23,065 [1],[3],[5],[6]
Investment, Identifier [Axis]: Rockland Park CLO, Ltd. | Structured Finance Note      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[4],[12],[27]   2,530  
Fair value, beginning balance 2,425 [2],[14],[15],[16] 2,425 [2],[14],[15],[16] 2,530 [1],[4],[12],[27]
Investment, Identifier [Axis]: Rooster BidCo Limited | LLC units      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[4],[25]   2,450  
Fair value, beginning balance [1],[4],[25]     2,450
Investment, Identifier [Axis]: Rooster BidCo Limited | LP interest      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[15],[26] 3,396 3,396  
Investment, Identifier [Axis]: Rooster BidCo Limited | One stop 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[4],[6],[25],[31]   44,685  
Fair value, beginning balance 44,066 [2],[8],[15],[26],[29] 44,066 [2],[8],[15],[26],[29] 44,685 [1],[4],[6],[25],[31]
Investment, Identifier [Axis]: Rooster BidCo Limited | One stop 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[4],[6],[25],[31]   1,064  
Fair value, beginning balance 2,098 [2],[8],[15],[26],[29] 2,098 [2],[8],[15],[26],[29] 1,064 [1],[4],[6],[25],[31]
Investment, Identifier [Axis]: Rooster BidCo Limited | One stop 3      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[4],[6],[9],[25],[31]   0  
Fair value, beginning balance 0 [2],[8],[10],[15],[26],[29] 0 [2],[8],[10],[15],[26],[29] 0 [1],[4],[6],[9],[25],[31]
Investment, Identifier [Axis]: Royal Holdco Corporation | One stop 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6]   27,725  
Fair value, beginning balance 27,290 [2],[7],[21] 27,290 [2],[7],[21] 27,725 [1],[6]
Investment, Identifier [Axis]: Royal Holdco Corporation | One stop 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6]   989  
Fair value, beginning balance 2,040 [2],[8] 2,040 [2],[8] 989 [1],[6]
Investment, Identifier [Axis]: Royal Holdco Corporation | One stop 3      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6]   1,993  
Fair value, beginning balance 7,022 [2],[8] 7,022 [2],[8] 1,993 [1],[6]
Investment, Identifier [Axis]: S.J. Electro Systems, LLC | One stop 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[7] 4,582 4,582  
Investment, Identifier [Axis]: S.J. Electro Systems, LLC | One stop 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[8],[10] (21) (21)  
Investment, Identifier [Axis]: SCP CDH Buyer, Inc. | Common stock      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2] 128 128  
Investment, Identifier [Axis]: SCP CDH Buyer, Inc. | One stop 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[8] 22,645 22,645  
Investment, Identifier [Axis]: SCP CDH Buyer, Inc. | One stop 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[8],[10] (12) (12)  
Investment, Identifier [Axis]: SCP CDH Buyer, Inc. | One stop 3      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[8] 4,519 4,519  
Investment, Identifier [Axis]: SCP CDH Buyer, Inc. | Preferred stock      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2] 845 845  
Investment, Identifier [Axis]: SDC Holdco, LLC | One stop 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6],[17],[30]   52,372  
Fair value, beginning balance 51,916 [2],[7],[8],[21] 51,916 [2],[7],[8],[21] 52,372 [1],[6],[17],[30]
Investment, Identifier [Axis]: SDC Holdco, LLC | One stop 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6],[9]   (31)  
Fair value, beginning balance (31) [2],[8],[10] (31) [2],[8],[10] (31) [1],[6],[9]
Investment, Identifier [Axis]: SDC Holdco, LLC | One stop 3      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[8] 8,860 8,860  
Investment, Identifier [Axis]: SMX Technologies | Senior secured      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[3],[5],[6]   7,632  
Fair value, beginning balance 7,268 [2],[8],[18],[19] 7,268 [2],[8],[18],[19] 7,632 [1],[3],[5],[6]
Investment, Identifier [Axis]: SSRG Holdings, LLC | One stop 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6],[17]   22,507  
Fair value, beginning balance 22,440 [2],[7],[21] 22,440 [2],[7],[21] 22,507 [1],[6],[17]
Investment, Identifier [Axis]: SSRG Holdings, LLC | One stop 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[30]   10,061  
Fair value, beginning balance 10,035 [2],[21] 10,035 [2],[21] 10,061 [1],[30]
Investment, Identifier [Axis]: SSRG Holdings, LLC | One stop 3      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6]   689  
Fair value, beginning balance 0 [2],[8],[10] 0 [2],[8],[10] 689 [1],[6]
Investment, Identifier [Axis]: SSRG Holdings, LLC | One stop 4      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6],[9]   (14)  
Fair value, beginning balance 2,839 [2],[8] 2,839 [2],[8] (14) [1],[6],[9]
Investment, Identifier [Axis]: SSRG Holdings, LLC | One stop 5      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6]   5,931  
Fair value, beginning balance 5,917 [2],[8] 5,917 [2],[8] 5,931 [1],[6]
Investment, Identifier [Axis]: Saguaro Buyer, LLC | Common stock      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2] 5,474 5,474  
Investment, Identifier [Axis]: Saguaro Buyer, LLC | LP units      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1]   4,038  
Fair value, beginning balance [1]     4,038
Investment, Identifier [Axis]: Saguaro Buyer, LLC | One stop 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[30]   2,718  
Fair value, beginning balance 3,373 [2],[8],[21] 3,373 [2],[8],[21] 2,718 [1],[30]
Investment, Identifier [Axis]: Saguaro Buyer, LLC | One stop 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6]   42  
Fair value, beginning balance 0 [2],[8],[10] 0 [2],[8],[10] 42 [1],[6]
Investment, Identifier [Axis]: Saguaro Buyer, LLC | One stop 3      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6]   0  
Fair value, beginning balance 1,479 [2],[8] 1,479 [2],[8] 0 [1],[6]
Investment, Identifier [Axis]: Saguaro Buyer, LLC | One stop 4      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6]   73  
Fair value, beginning balance 519 [2],[8] 519 [2],[8] 73 [1],[6]
Investment, Identifier [Axis]: Salisbury House, LLC | One stop 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6]   1,236  
Fair value, beginning balance (70) [2],[8],[10] (70) [2],[8],[10] 1,236 [1],[6]
Investment, Identifier [Axis]: Salisbury House, LLC | One stop 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6],[9]   (116)  
Fair value, beginning balance 2,676 [2],[8] 2,676 [2],[8] (116) [1],[6],[9]
Investment, Identifier [Axis]: Salisbury House, LLC | One stop 3      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6]   57,037  
Fair value, beginning balance 56,807 [2],[7],[8] 56,807 [2],[7],[8] 57,037 [1],[6]
Investment, Identifier [Axis]: Sapphire Bidco Oy | One stop      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[4],[6],[31],[50]   15,258  
Fair value, beginning balance [1],[4],[6],[31],[50]     15,258
Investment, Identifier [Axis]: Sapphire Bidco Oy | One stop 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[8],[15],[29],[49] 14,552 14,552  
Investment, Identifier [Axis]: Sapphire Bidco Oy | One stop 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[8],[15],[29],[49] 3,803 3,803  
Investment, Identifier [Axis]: Saturn Borrower Inc. | One stop 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[17]   8,170  
Fair value, beginning balance 7,987 [2],[7] 7,987 [2],[7] 8,170 [1],[17]
Investment, Identifier [Axis]: Saturn Borrower Inc. | One stop 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6]   216  
Fair value, beginning balance 232 [2],[8] 232 [2],[8] 216 [1],[6]
Investment, Identifier [Axis]: Scientific Games Holdings LP | Senior secured      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[3],[5],[6]   14,861  
Fair value, beginning balance 16,261 [2],[8],[18],[19],[20] 16,261 [2],[8],[18],[19],[20] 14,861 [1],[3],[5],[6]
Investment, Identifier [Axis]: Service Logic Acquisition, Inc. | Senior secured      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[3],[6]   12,903  
Fair value, beginning balance [1],[3],[6]     12,903
Investment, Identifier [Axis]: Severin Acquisition, LLC | One stop 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6],[22]   33,809  
Fair value, beginning balance 33,449 [2],[7],[8],[24] 33,449 [2],[7],[8],[24] 33,809 [1],[6],[22]
Investment, Identifier [Axis]: Severin Acquisition, LLC | One stop 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6],[9]   (42)  
Fair value, beginning balance 1,997 [2],[8] 1,997 [2],[8] (42) [1],[6],[9]
Investment, Identifier [Axis]: Severin Acquisition, LLC | One stop 3      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6],[22]   1,123  
Fair value, beginning balance 1,615 [2],[8],[24] 1,615 [2],[8],[24] 1,123 [1],[6],[22]
Investment, Identifier [Axis]: Shift Payments, LLC | Senior secured      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[3],[4],[5]   504  
Fair value, beginning balance [1],[3],[4],[5]     504
Investment, Identifier [Axis]: Shout! Factory, LLC | One stop 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6]   17,783  
Fair value, beginning balance 17,222 [2],[7],[8] 17,222 [2],[7],[8] 17,783 [1],[6]
Investment, Identifier [Axis]: Shout! Factory, LLC | One stop 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6]   368  
Fair value, beginning balance 552 [2],[8] 552 [2],[8] 368 [1],[6]
Investment, Identifier [Axis]: Signant Finance One Limited | One stop 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[8] 968 968  
Investment, Identifier [Axis]: Signant Finance One Limited | One stop 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[8],[24] 38,503 38,503  
Investment, Identifier [Axis]: Signant Finance One Limited | One stop 3      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[8],[10] (38) (38)  
Investment, Identifier [Axis]: Signature MD, Inc. | Common stock      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2] 800 800  
Investment, Identifier [Axis]: Signature MD, Inc. | One stop 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[8],[10] 0 0  
Investment, Identifier [Axis]: Signature MD, Inc. | One stop 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[8] 6,251 6,251  
Investment, Identifier [Axis]: Signature MD, Inc. | One stop 3      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[8],[10] 21 21  
Investment, Identifier [Axis]: Signia Aerospace, LLC | Senior secured      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[10],[18],[20] 0 0  
Investment, Identifier [Axis]: Signia Aerospace, LLC | Senior secured 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[3],[6]   8,569  
Fair value, beginning balance [1],[3],[6]     8,569
Investment, Identifier [Axis]: Signia Aerospace, LLC | Senior secured 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[3],[6],[9]   1  
Fair value, beginning balance [1],[3],[6],[9]     1
Investment, Identifier [Axis]: Sixth Street CLO XII, Ltd. | Structured Finance Note      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[14],[15],[16] 1,986 1,986  
Investment, Identifier [Axis]: Sixth Street CLO XIV, Ltd. | Structured Finance Note      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[4],[12],[27]   2,011  
Fair value, beginning balance 1,964 [2],[14],[15],[16] 1,964 [2],[14],[15],[16] 2,011 [1],[4],[12],[27]
Investment, Identifier [Axis]: Sixth Street CLO XVIII, Ltd. | Structured Finance Note      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[4],[27]   3,029  
Fair value, beginning balance 2,933 [2],[14],[15],[16] 2,933 [2],[14],[15],[16] 3,029 [1],[4],[27]
Investment, Identifier [Axis]: Smart Energy Systems, Inc. | One stop 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6],[22]   5,721  
Fair value, beginning balance 6,006 [2],[8],[24] 6,006 [2],[8],[24] 5,721 [1],[6],[22]
Investment, Identifier [Axis]: Smart Energy Systems, Inc. | One stop 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6],[22]   630  
Fair value, beginning balance 662 [2],[8],[24] 662 [2],[8],[24] 630 [1],[6],[22]
Investment, Identifier [Axis]: Sophia, L.P. | Senior secured      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[3],[4],[5]   8,053  
Fair value, beginning balance 8,683 [2],[15],[18],[19],[20] 8,683 [2],[15],[18],[19],[20] 8,053 [1],[3],[4],[5]
Investment, Identifier [Axis]: Southern Veterinary Partners, LLC | Senior secured      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[3],[5],[6]   18,454  
Fair value, beginning balance 18,333 [2],[8],[18],[19],[20] 18,333 [2],[8],[18],[19],[20] 18,454 [1],[3],[5],[6]
Investment, Identifier [Axis]: Spark Bidco Limited | One stop 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[4],[6],[25],[31]   0  
Fair value, beginning balance 19,610 [2],[8],[15],[26],[29] 19,610 [2],[8],[15],[26],[29] 0 [1],[4],[6],[25],[31]
Investment, Identifier [Axis]: Spark Bidco Limited | One stop 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[4],[6],[25]   0  
Fair value, beginning balance 91,409 [2],[8],[15],[26] 91,409 [2],[8],[15],[26] 0 [1],[4],[6],[25]
Investment, Identifier [Axis]: Spark Bidco Limited | One stop 3      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[4],[6],[25]   0  
Fair value, beginning balance (674) [2],[8],[10],[15],[26] (674) [2],[8],[10],[15],[26] 0 [1],[4],[6],[25]
Investment, Identifier [Axis]: Spark Bidco Limited | One stop 4      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[4],[6],[25]   0  
Fair value, beginning balance 33,075 [2],[8],[15],[26] 33,075 [2],[8],[15],[26] 0 [1],[4],[6],[25]
Investment, Identifier [Axis]: Spartan Buyer Acquisition Co. | One stop      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[8],[24] 493 493  
Investment, Identifier [Axis]: Sphynx UK Bidco, Ltd. | One stop 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[4],[6],[25],[31]   8,598  
Fair value, beginning balance 9,054 [2],[8],[15],[26],[29] 9,054 [2],[8],[15],[26],[29] 8,598 [1],[4],[6],[25],[31]
Investment, Identifier [Axis]: Sphynx UK Bidco, Ltd. | One stop 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[4],[6],[25],[31]   8,448  
Fair value, beginning balance 8,273 [2],[8],[15],[26],[29] 8,273 [2],[8],[15],[26],[29] 8,448 [1],[4],[6],[25],[31]
Investment, Identifier [Axis]: Sphynx UK Bidco, Ltd. | One stop 3      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[4],[6],[25],[31]   39,052  
Fair value, beginning balance 38,753 [2],[8],[15],[26],[29] 38,753 [2],[8],[15],[26],[29] 39,052 [1],[4],[6],[25],[31]
Investment, Identifier [Axis]: Spindrift Beverage Co. Inc. | One stop 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6]   22,323  
Fair value, beginning balance [1],[6]     22,323
Investment, Identifier [Axis]: Spindrift Beverage Co. Inc. | One stop 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6],[9]   0  
Fair value, beginning balance [1],[6],[9]     0
Investment, Identifier [Axis]: Spindrift Beverage Co. Inc. | One stop 3      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6],[9]   0  
Fair value, beginning balance [1],[6],[9]     0
Investment, Identifier [Axis]: Spindrift Beverage Co., Inc. | One stop 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[7],[8] 23,022 23,022  
Investment, Identifier [Axis]: Spindrift Beverage Co., Inc. | One stop 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[8] 510 510  
Investment, Identifier [Axis]: Spindrift Beverage Co., Inc. | One stop 3      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[8],[10] 0 0  
Investment, Identifier [Axis]: Stellar Brands, LLC | Senior secured 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[30]   9,101  
Fair value, beginning balance 9,033 [2],[21] 9,033 [2],[21] 9,101 [1],[30]
Investment, Identifier [Axis]: Stellar Brands, LLC | Senior secured 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6],[9]   0  
Fair value, beginning balance 0 [2],[8],[10] 0 [2],[8],[10] 0 [1],[6],[9]
Investment, Identifier [Axis]: Stratose Intermediate Holdings II, LLC | Senior secured      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[18],[20] 2,609 2,609  
Investment, Identifier [Axis]: Stratose Intermediate Holdings II, LLC | Senior secured 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[3],[5],[6]   10,961  
Fair value, beginning balance [1],[3],[5],[6]     10,961
Investment, Identifier [Axis]: Stratose Intermediate Holdings II, LLC | Senior secured 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[5],[6]   1,986  
Fair value, beginning balance [1],[5],[6]     1,986
Investment, Identifier [Axis]: Strickland's Enterprises, LLC | Senior secured 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[8] 7,130 7,130  
Investment, Identifier [Axis]: Strickland's Enterprises, LLC | Senior secured 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[8],[10] 0 0  
Investment, Identifier [Axis]: Strickland's Enterprises, LLC | Senior secured 3      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[8],[10] 0 0  
Investment, Identifier [Axis]: Striim, Inc. | One stop      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[8],[24] 500 500  
Investment, Identifier [Axis]: Striim, Inc. | Warrant      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2] 15 15  
Investment, Identifier [Axis]: StrongDM, Inc. | Preferred stock      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1]   3,745  
Fair value, beginning balance [1]     3,745
Investment, Identifier [Axis]: Super REGO, LLC | Subordinated debt      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6],[22]   37  
Fair value, beginning balance [1],[6],[22]     37
Investment, Identifier [Axis]: Symplr Software, Inc. | Senior secured      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[3],[5]   2,444  
Fair value, beginning balance 1,774 [2],[18],[19],[20] 1,774 [2],[18],[19],[20] 2,444 [1],[3],[5]
Investment, Identifier [Axis]: TIDI Legacy Products, Inc. | One stop 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6]   1,633  
Fair value, beginning balance 1,610 [2],[7] 1,610 [2],[7] 1,633 [1],[6]
Investment, Identifier [Axis]: TIDI Legacy Products, Inc. | One stop 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6]   0  
Fair value, beginning balance (3) [2],[8],[10] (3) [2],[8],[10] 0 [1],[6]
Investment, Identifier [Axis]: TIDI Legacy Products, Inc. | One stop 3      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6]   0  
Fair value, beginning balance 431 [2],[8] 431 [2],[8] 0 [1],[6]
Investment, Identifier [Axis]: TLB Holdings I, LLC | One stop 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[8],[10] (8) (8)  
Investment, Identifier [Axis]: TLB Holdings I, LLC | One stop 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[8],[21] 5,800 5,800  
Investment, Identifier [Axis]: TLB Holdings I, LLC | One stop 3      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[8],[10] (10) (10)  
Investment, Identifier [Axis]: TWAS Holdings, LLC | One stop      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6],[17],[30]   22,705  
Fair value, beginning balance [1],[6],[17],[30]     22,705
Investment, Identifier [Axis]: TWAS Holdings, LLC | One stop 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[7],[8],[21] 24,539 24,539  
Investment, Identifier [Axis]: TWAS Holdings, LLC | One stop 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[8],[10] (37) (37)  
Investment, Identifier [Axis]: Tacala LLC | Senior secured      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[3],[5],[6]   24,603  
Fair value, beginning balance 10,105 [2],[8],[18],[19],[20] 10,105 [2],[8],[18],[19],[20] 24,603 [1],[3],[5],[6]
Investment, Identifier [Axis]: Teaching Company, The | Senior secured 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[8] 6,794 6,794  
Investment, Identifier [Axis]: Teaching Company, The | Senior secured 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[8],[10] (14) (14)  
Investment, Identifier [Axis]: Tebra Technologies, Inc. | One stop      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6],[22]   11,283  
Fair value, beginning balance [1],[6],[22]     11,283
Investment, Identifier [Axis]: Technimark, LLC | Senior secured      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[3],[6]   14,760  
Fair value, beginning balance 14,042 [2],[8],[18],[19] 14,042 [2],[8],[18],[19] 14,760 [1],[3],[6]
Investment, Identifier [Axis]: Telesoft Holdings LLC | One stop      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[17]   5,627  
Fair value, beginning balance [1],[17]     5,627
Investment, Identifier [Axis]: Telesoft Holdings, LLC | One stop      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[7] 5,583 5,583  
Investment, Identifier [Axis]: Thermogenics, Inc. | One stop 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[4],[6],[31],[48]   888  
Fair value, beginning balance 860 [2],[8],[15],[29],[33] 860 [2],[8],[15],[29],[33] 888 [1],[4],[6],[31],[48]
Investment, Identifier [Axis]: Thermogenics, Inc. | One stop 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[4],[6],[9],[48]   0  
Fair value, beginning balance (3) [2],[8],[10],[15],[33] (3) [2],[8],[10],[15],[33] 0 [1],[4],[6],[9],[48]
Investment, Identifier [Axis]: Thermogenics, Inc. | One stop 3      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[4],[30],[48]   1,154  
Fair value, beginning balance 1,140 [2],[15],[21],[33] 1,140 [2],[15],[21],[33] 1,154 [1],[4],[30],[48]
Investment, Identifier [Axis]: Thermogenics, Inc. | One stop 4      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[4],[6],[9],[48]   0  
Fair value, beginning balance (9) [2],[8],[10],[15],[33] (9) [2],[8],[10],[15],[33] 0 [1],[4],[6],[9],[48]
Investment, Identifier [Axis]: Thermogenics, Inc. | One stop 5      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[4],[6],[31],[48]   91  
Fair value, beginning balance 88 [2],[8],[15],[29],[33] 88 [2],[8],[15],[29],[33] 91 [1],[4],[6],[31],[48]
Investment, Identifier [Axis]: Thermogenics, Inc. | One stop 6      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[8],[15],[33] 670 670  
Investment, Identifier [Axis]: Thermogenics, Inc. | One stop 7      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[8],[15],[33] 359 359  
Investment, Identifier [Axis]: Thermogenics, Inc. | One stop 8      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[8],[15],[29],[33] 454 454  
Investment, Identifier [Axis]: Thermostat Purchaser III, Inc. | Senior secured      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[5],[6]   11,980  
Fair value, beginning balance 8,756 [2],[8],[18],[20] 8,756 [2],[8],[18],[20] 11,980 [1],[5],[6]
Investment, Identifier [Axis]: Titan BW Borrower L.P. | One stop 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6],[22]   15,827  
Fair value, beginning balance 16,463 [2],[7],[8],[24] 16,463 [2],[7],[8],[24] 15,827 [1],[6],[22]
Investment, Identifier [Axis]: Titan BW Borrower L.P. | One stop 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6],[9]   (27)  
Fair value, beginning balance (25) [2],[8],[10] (25) [2],[8],[10] (27) [1],[6],[9]
Investment, Identifier [Axis]: Titan BW Borrower L.P. | One stop 3      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6],[9]   (14)  
Fair value, beginning balance 814 [2],[8] 814 [2],[8] (14) [1],[6],[9]
Investment, Identifier [Axis]: Togetherwork Holdings, LLC | LP interest      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2] 2,405 2,405  
Investment, Identifier [Axis]: Togetherwork Holdings, LLC | One stop 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6],[30]   43,984  
Fair value, beginning balance 42,769 [2],[8] 42,769 [2],[8] 43,984 [1],[6],[30]
Investment, Identifier [Axis]: Togetherwork Holdings, LLC | One stop 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6]   1,039  
Fair value, beginning balance 1,072 [2],[8] 1,072 [2],[8] 1,039 [1],[6]
Investment, Identifier [Axis]: Togetherwork Holdings, LLC | One stop 3      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6],[9]   (53)  
Fair value, beginning balance 689 [2],[8] 689 [2],[8] (53) [1],[6],[9]
Investment, Identifier [Axis]: Togetherwork Holdings, LLC | One stop 4      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[8] 415 415  
Investment, Identifier [Axis]: Togetherwork Holdings, LLC | Preferred stock      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1]   2,445  
Fair value, beginning balance [1]     2,445
Investment, Identifier [Axis]: Transdigm, Inc. | Senior secured      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[3],[4],[5],[6]   21,076  
Fair value, beginning balance 2,989 [2],[15],[18],[20] 2,989 [2],[15],[18],[20] 21,076 [1],[3],[4],[5],[6]
Investment, Identifier [Axis]: Transform Bidco Limited | LP interest      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[15],[26] 2,414 2,414  
Investment, Identifier [Axis]: Transform Bidco Limited | LP units      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[4],[25]   3,601  
Fair value, beginning balance [1],[4],[25]     3,601
Investment, Identifier [Axis]: Transform Bidco Limited | One stop 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[4],[6],[25]   14,863  
Fair value, beginning balance 14,660 [2],[8],[15],[24],[26] 14,660 [2],[8],[15],[24],[26] 14,863 [1],[4],[6],[25]
Investment, Identifier [Axis]: Transform Bidco Limited | One stop 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[4],[6],[25]   7,874  
Fair value, beginning balance 7,767 [2],[8],[15],[24],[26] 7,767 [2],[8],[15],[24],[26] 7,874 [1],[4],[6],[25]
Investment, Identifier [Axis]: Transform Bidco Limited | One stop 3      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[4],[6],[22],[25],[31]   2,647  
Fair value, beginning balance 2,733 [2],[8],[15],[24],[26],[29] 2,733 [2],[8],[15],[24],[26],[29] 2,647 [1],[4],[6],[22],[25],[31]
Investment, Identifier [Axis]: Transform Bidco Limited | One stop 4      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[4],[6],[22],[25],[31]   420  
Fair value, beginning balance 409 [2],[8],[15],[24],[26],[29] 409 [2],[8],[15],[24],[26],[29] 420 [1],[4],[6],[22],[25],[31]
Investment, Identifier [Axis]: Transform Bidco Limited | One stop 5      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[4],[6],[9],[25]   0  
Fair value, beginning balance 1,128 [2],[8],[15],[26] 1,128 [2],[8],[15],[26] 0 [1],[4],[6],[9],[25]
Investment, Identifier [Axis]: Transform Bidco Limited | One stop 6      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[4],[6],[9],[25]   0  
Fair value, beginning balance (161) [2],[8],[10],[15],[26] (161) [2],[8],[10],[15],[26] 0 [1],[4],[6],[9],[25]
Investment, Identifier [Axis]: Transform Bidco Limited | One stop 7      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[4],[6],[9],[25]   0  
Fair value, beginning balance (515) [2],[8],[10],[15],[26] (515) [2],[8],[10],[15],[26] 0 [1],[4],[6],[9],[25]
Investment, Identifier [Axis]: Tricentis Operations Holdings, Inc. | LP interest      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2] 39 39  
Investment, Identifier [Axis]: Tricentis Operations Holdings, Inc. | One stop 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6],[22]   63,398  
Fair value, beginning balance 63,872 [2],[8],[24] 63,872 [2],[8],[24] 63,398 [1],[6],[22]
Investment, Identifier [Axis]: Tricentis Operations Holdings, Inc. | One stop 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6],[9]   0  
Fair value, beginning balance (192) [2],[8],[10] (192) [2],[8],[10] 0 [1],[6],[9]
Investment, Identifier [Axis]: Tricentis Operations Holdings, Inc. | One stop 3      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6],[9]   0  
Fair value, beginning balance (308) [2],[8],[10] (308) [2],[8],[10] 0 [1],[6],[9]
Investment, Identifier [Axis]: Tricentis Operations Holdings, Inc. | Preferred stock      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1]   44  
Fair value, beginning balance [1]     44
Investment, Identifier [Axis]: Trinity Air Consultants Holdings Corporation | One stop 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[8],[10] (5) (5)  
Investment, Identifier [Axis]: Trinity Air Consultants Holdings Corporation | One stop 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[8] 901 901  
Investment, Identifier [Axis]: Trinity Air Consultants Holdings Corporation | One stop 3      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[8] 2,686 2,686  
Investment, Identifier [Axis]: Trinity Air Consultants Holdings Corporation | One stop 4      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[8] 5,197 5,197  
Investment, Identifier [Axis]: Trinity Air Consultants Holdings Corporation | One stop 5      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[8],[10] (9) (9)  
Investment, Identifier [Axis]: Trintech, Inc. | One stop 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[8],[10] (216) (216)  
Investment, Identifier [Axis]: Trintech, Inc. | One stop 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[8] 41,527 41,527  
Investment, Identifier [Axis]: Trintech, Inc. | One stop 3      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[8],[10] (288) (288)  
Investment, Identifier [Axis]: Triple Lift, Inc. | One stop 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[17]   8,073  
Fair value, beginning balance 8,161 [2],[7] 8,161 [2],[7] 8,073 [1],[17]
Investment, Identifier [Axis]: Triple Lift, Inc. | One stop 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[17]   2,368  
Fair value, beginning balance 2,394 [2],[7] 2,394 [2],[7] 2,368 [1],[17]
Investment, Identifier [Axis]: Trucordia Insurance Holdings, LLC | Senior secured      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[18],[20] 3,562 3,562  
Investment, Identifier [Axis]: Truist Insurance Holdings, LLC | Senior secured      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[3],[4],[5],[6]   14,297  
Fair value, beginning balance [1],[3],[4],[5],[6]     14,297
Investment, Identifier [Axis]: UKG Inc. | Senior secured      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[5],[6]   25,379  
Fair value, beginning balance 23,777 [2],[8],[18],[20] 23,777 [2],[8],[18],[20] 25,379 [1],[5],[6]
Investment, Identifier [Axis]: VRS Buyer, Inc. | Senior secured 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6]   72,281  
Fair value, beginning balance 12,017 [2],[18],[19] 12,017 [2],[18],[19] 72,281 [1],[6]
Investment, Identifier [Axis]: VRS Buyer, Inc. | Senior secured 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6],[9]   0  
Fair value, beginning balance (6) [2],[10],[18],[19] (6) [2],[10],[18],[19] 0 [1],[6],[9]
Investment, Identifier [Axis]: VRS Buyer, Inc. | Senior secured 3      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6],[9]   0  
Fair value, beginning balance [1],[6],[9]     0
Investment, Identifier [Axis]: VS Buyer, LLC | Senior secured      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[5],[6]   11,947  
Fair value, beginning balance 11,438 [2],[8],[18],[20] 11,438 [2],[8],[18],[20] 11,947 [1],[5],[6]
Investment, Identifier [Axis]: VSG Acquisition Corp. and Sherrill, Inc. | One stop 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6],[17]   30,921  
Fair value, beginning balance 32,863 [2],[7],[8],[21] 32,863 [2],[7],[8],[21] 30,921 [1],[6],[17]
Investment, Identifier [Axis]: VSG Acquisition Corp. and Sherrill, Inc. | One stop 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6]   424  
Fair value, beginning balance (4) [2],[8],[10] (4) [2],[8],[10] 424 [1],[6]
Investment, Identifier [Axis]: VSG Acquisition Corp. and Sherrill, Inc. | One stop 3      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6],[9]   (11)  
Fair value, beginning balance [1],[6],[9]     (11)
Investment, Identifier [Axis]: Vanco Payment Solutions, LLC | One stop 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[8],[10] (27) (27)  
Investment, Identifier [Axis]: Vanco Payment Solutions, LLC | One stop 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[8] 18,549 18,549  
Investment, Identifier [Axis]: Vantage Bidco GMBH | One stop 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[4],[6],[22],[31],[43]   21,781  
Fair value, beginning balance 20,349 [2],[8],[15],[29],[44] 20,349 [2],[8],[15],[29],[44] 21,781 [1],[4],[6],[22],[31],[43]
Investment, Identifier [Axis]: Vantage Bidco GMBH | One stop 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[4],[6],[9],[31],[43]   0  
Fair value, beginning balance (145) [2],[8],[10],[15],[29],[44] (145) [2],[8],[10],[15],[29],[44] 0 [1],[4],[6],[9],[31],[43]
Investment, Identifier [Axis]: Varicent Intermediate Holdings Corporation | One stop 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[4],[6],[22],[48]   44,210  
Fair value, beginning balance 43,245 [2],[8],[15],[24],[33] 43,245 [2],[8],[15],[24],[33] 44,210 [1],[4],[6],[22],[48]
Investment, Identifier [Axis]: Varicent Intermediate Holdings Corporation | One stop 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[4],[6],[9],[48]   0  
Fair value, beginning balance (339) [2],[8],[10],[15],[33] (339) [2],[8],[10],[15],[33] 0 [1],[4],[6],[9],[48]
Investment, Identifier [Axis]: Varicent Intermediate Holdings Corporation | One stop 3      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[4],[6],[9],[48]   0  
Fair value, beginning balance (189) [2],[8],[10],[15],[33] (189) [2],[8],[10],[15],[33] 0 [1],[4],[6],[9],[48]
Investment, Identifier [Axis]: Varicent Intermediate Holdings Corporation | One stop 4      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[8],[15],[24],[33] 22,368 22,368  
Investment, Identifier [Axis]: Varicent Intermediate Holdings Corporation | One stop 5      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[8],[10],[15],[33] (219) (219)  
Investment, Identifier [Axis]: Varinem German Midco GMBH | One stop 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[4],[6],[31],[43]   27,688  
Fair value, beginning balance 26,879 [2],[8],[15],[29],[44] 26,879 [2],[8],[15],[29],[44] 27,688 [1],[4],[6],[31],[43]
Investment, Identifier [Axis]: Varinem German Midco GMBH | One stop 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[4],[6],[31],[43]   10,743  
Fair value, beginning balance 11,802 [2],[8],[15],[29],[44] 11,802 [2],[8],[15],[29],[44] 10,743 [1],[4],[6],[31],[43]
Investment, Identifier [Axis]: Vessco Midco Holdings, LLC | One stop 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6]   15,577  
Fair value, beginning balance 15,507 [2],[21] 15,507 [2],[21] 15,577 [1],[6]
Investment, Identifier [Axis]: Vessco Midco Holdings, LLC | One stop 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6]   2,821  
Fair value, beginning balance 5,083 [2],[8] 5,083 [2],[8] 2,821 [1],[6]
Investment, Identifier [Axis]: Vessco Midco Holdings, LLC | One stop 3      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6],[9]   0  
Fair value, beginning balance 61 [2],[8] 61 [2],[8] 0 [1],[6],[9]
Investment, Identifier [Axis]: Vessco Midco Holdings, LLC | One stop 4      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[8] 4,795 4,795  
Investment, Identifier [Axis]: Vessco Midco Holdings, LLC | One stop 5      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[8],[10] (21) (21)  
Investment, Identifier [Axis]: Viper Bidco, Inc. | One stop 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6],[30]   50,491  
Fair value, beginning balance 52,724 [2],[8] 52,724 [2],[8] 50,491 [1],[6],[30]
Investment, Identifier [Axis]: Viper Bidco, Inc. | One stop 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6],[31]   24,859  
Fair value, beginning balance 23,904 [2],[8],[29] 23,904 [2],[8],[29] 24,859 [1],[6],[31]
Investment, Identifier [Axis]: Viper Bidco, Inc. | One stop 3      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6],[9]   0  
Fair value, beginning balance (77) [2],[8],[10] (77) [2],[8],[10] 0 [1],[6],[9]
Investment, Identifier [Axis]: Viper Bidco, Inc. | One stop 4      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6],[9]   0  
Fair value, beginning balance (43) [2],[8],[10] (43) [2],[8],[10] 0 [1],[6],[9]
Investment, Identifier [Axis]: Viper Bidco, Inc. | One stop 5      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6],[9]   (44)  
Fair value, beginning balance (220) [2],[8],[10] (220) [2],[8],[10] (44) [1],[6],[9]
Investment, Identifier [Axis]: Virginia Green Acquisition, LLC | LP interest      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2] 103 103  
Investment, Identifier [Axis]: Virginia Green Acquisition, LLC | One stop 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6],[17],[30]   19,739  
Fair value, beginning balance 20,710 [2],[7],[8],[21] 20,710 [2],[7],[8],[21] 19,739 [1],[6],[17],[30]
Investment, Identifier [Axis]: Virginia Green Acquisition, LLC | One stop 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6],[9]   0  
Fair value, beginning balance (9) [2],[8],[10] (9) [2],[8],[10] 0 [1],[6],[9]
Investment, Identifier [Axis]: Virginia Green Acquisition, LLC | One stop 3      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6],[9]   0  
Fair value, beginning balance (42) [2],[8],[10] (42) [2],[8],[10] 0 [1],[6],[9]
Investment, Identifier [Axis]: Virginia Green Acquisition, LLC | Preferred stock      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1]   83  
Fair value, beginning balance [1]     83
Investment, Identifier [Axis]: Voya CLO 2020-2, Ltd. | Structured Finance Note      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[4],[12],[27]   1,012  
Fair value, beginning balance 979 [2],[14],[15],[16] 979 [2],[14],[15],[16] 1,012 [1],[4],[12],[27]
Investment, Identifier [Axis]: Voya CLO 2025-2, Ltd. | Structured Finance Note      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[4],[12],[27]   5,027  
Fair value, beginning balance 5,067 [2],[14],[15],[16] 5,067 [2],[14],[15],[16] 5,027 [1],[4],[12],[27]
Investment, Identifier [Axis]: Voya CLO 2025-4, Ltd. | Structured Finance Note      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[4],[27]   5,761  
Fair value, beginning balance 5,724 [2],[14],[15],[16] 5,724 [2],[14],[15],[16] 5,761 [1],[4],[27]
Investment, Identifier [Axis]: W.R. Grace & Co | Senior secured      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[15],[18],[19],[20] 8,472 8,472  
Investment, Identifier [Axis]: W.R. Grace Co | Senior secured      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[3],[4]   12,050  
Fair value, beginning balance [1],[3],[4]     12,050
Investment, Identifier [Axis]: WP Deluxe Merger Sub | Senior secured      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[3],[5],[6]   11,799  
Fair value, beginning balance 7,140 [2],[8],[18],[19],[20] 7,140 [2],[8],[18],[19],[20] 11,799 [1],[3],[5],[6]
Investment, Identifier [Axis]: WPEngine, Inc. | One stop 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6]   953  
Fair value, beginning balance 943 [2],[8] 943 [2],[8] 953 [1],[6]
Investment, Identifier [Axis]: WPEngine, Inc. | One stop 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6]   0  
Fair value, beginning balance 0 [2],[8] 0 [2],[8] 0 [1],[6]
Investment, Identifier [Axis]: WRE Holding Corp. | One stop 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6],[30]   31,331  
Fair value, beginning balance 30,694 [2],[8],[21] 30,694 [2],[8],[21] 31,331 [1],[6],[30]
Investment, Identifier [Axis]: WRE Holding Corp. | One stop 10      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[8] 674 674  
Investment, Identifier [Axis]: WRE Holding Corp. | One stop 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6],[9]   0  
Fair value, beginning balance 2,215 [2],[8] 2,215 [2],[8] 0 [1],[6],[9]
Investment, Identifier [Axis]: WRE Holding Corp. | One stop 3      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[17]   3,439  
Fair value, beginning balance 3,369 [2],[7] 3,369 [2],[7] 3,439 [1],[17]
Investment, Identifier [Axis]: WRE Holding Corp. | One stop 4      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[17]   2,072  
Fair value, beginning balance 2,030 [2],[7] 2,030 [2],[7] 2,072 [1],[17]
Investment, Identifier [Axis]: WRE Holding Corp. | One stop 5      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[30]   1,612  
Fair value, beginning balance 1,579 [2],[21] 1,579 [2],[21] 1,612 [1],[30]
Investment, Identifier [Axis]: WRE Holding Corp. | One stop 6      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6]   564  
Fair value, beginning balance 553 [2],[8] 553 [2],[8] 564 [1],[6]
Investment, Identifier [Axis]: WRE Holding Corp. | One stop 7      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6]   577  
Fair value, beginning balance 565 [2],[8] 565 [2],[8] 577 [1],[6]
Investment, Identifier [Axis]: WRE Holding Corp. | One stop 8      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6]   358  
Fair value, beginning balance 351 [2],[8] 351 [2],[8] 358 [1],[6]
Investment, Identifier [Axis]: WRE Holding Corp. | One stop 9      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[8],[10] (108) (108)  
Investment, Identifier [Axis]: WU Holdco, Inc. | One stop 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6]   21,573  
Fair value, beginning balance 21,202 [2],[7],[8] 21,202 [2],[7],[8] 21,573 [1],[6]
Investment, Identifier [Axis]: WU Holdco, Inc. | One stop 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6],[9]   0  
Fair value, beginning balance (16) [2],[8],[10] (16) [2],[8],[10] 0 [1],[6],[9]
Investment, Identifier [Axis]: WU Holdco, Inc. | One stop 3      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6],[9]   0  
Fair value, beginning balance (52) [2],[8],[10] (52) [2],[8],[10] 0 [1],[6],[9]
Investment, Identifier [Axis]: Wand NewCo , Inc. | Senior secured      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[4],[5],[6]   14,184  
Fair value, beginning balance [1],[4],[5],[6]     14,184
Investment, Identifier [Axis]: Wand NewCo 3, Inc. | Senior secured      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[15],[18],[20] 995 995  
Investment, Identifier [Axis]: Wasabi Lower Holdco, LLC | Senior secured 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6],[9]   0  
Fair value, beginning balance (41) [2],[8],[10] (41) [2],[8],[10] 0 [1],[6],[9]
Investment, Identifier [Axis]: Wasabi Lower Holdco, LLC | Senior secured 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6]   6,950  
Fair value, beginning balance 6,788 [2],[8] 6,788 [2],[8] 6,950 [1],[6]
Investment, Identifier [Axis]: Wealth Enhancement Group, LLC | One stop 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[17]   3,781  
Fair value, beginning balance 3,737 [2],[7] 3,737 [2],[7] 3,781 [1],[17]
Investment, Identifier [Axis]: Wealth Enhancement Group, LLC | One stop 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[17]   2,726  
Fair value, beginning balance 2,695 [2],[7] 2,695 [2],[7] 2,726 [1],[17]
Investment, Identifier [Axis]: Wealth Enhancement Group, LLC | One stop 3      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6],[9]   0  
Fair value, beginning balance (3) [2],[8],[10] (3) [2],[8],[10] 0 [1],[6],[9]
Investment, Identifier [Axis]: Wealth Enhancement Group, LLC | One stop 4      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6]   2,704  
Fair value, beginning balance 14,928 [2],[8] 14,928 [2],[8] 2,704 [1],[6]
Investment, Identifier [Axis]: Wealth Enhancement Group, LLC | One stop 5      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6],[9]   0  
Fair value, beginning balance (33) [2],[8],[10] (33) [2],[8],[10] 0 [1],[6],[9]
Investment, Identifier [Axis]: Wealth Enhancement Group, LLC | One stop 6      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[8] 640 640  
Investment, Identifier [Axis]: Wealth Enhancement Group, LLC | One stop 7      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[8] 2,868 2,868  
Investment, Identifier [Axis]: Wealth Enhancement Group, LLC | One stop 8      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[8] 165 165  
Investment, Identifier [Axis]: Wildcat TopCo, Inc. | One stop 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6]   24,718  
Fair value, beginning balance [1],[6]     24,718
Investment, Identifier [Axis]: Wildcat TopCo, Inc. | One stop 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6]   119  
Fair value, beginning balance [1],[6]     119
Investment, Identifier [Axis]: Wildcat TopCo, Inc. | One stop 3      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6],[9]   0  
Fair value, beginning balance [1],[6],[9]     0
Investment, Identifier [Axis]: Windsor Holdings III, LLC | Senior secured      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[3],[4],[5],[6]   16,841  
Fair value, beginning balance 3,487 [2],[15],[18],[20] 3,487 [2],[15],[18],[20] 16,841 [1],[3],[4],[5],[6]
Investment, Identifier [Axis]: Winebow Holdings, Inc. | One stop      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6]   13,437  
Fair value, beginning balance 12,602 [2],[8] 12,602 [2],[8] 13,437 [1],[6]
Investment, Identifier [Axis]: Wireco Worldgroup Inc. | Senior secured      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6]   6,098  
Fair value, beginning balance 9,142 [2],[8],[18] 9,142 [2],[8],[18] 6,098 [1],[6]
Investment, Identifier [Axis]: World Insurance Associates, LLC | One stop 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6]   6,736  
Fair value, beginning balance 21,373 [2],[8] 21,373 [2],[8] 6,736 [1],[6]
Investment, Identifier [Axis]: World Insurance Associates, LLC | One stop 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6],[9]   0  
Fair value, beginning balance (8) [2],[8],[10] (8) [2],[8],[10] 0 [1],[6],[9]
Investment, Identifier [Axis]: YE Brands Holding, LLC | One stop 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[17]   6,268  
Fair value, beginning balance 6,220 [2],[7] 6,220 [2],[7] 6,268 [1],[17]
Investment, Identifier [Axis]: YE Brands Holding, LLC | One stop 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6]   892  
Fair value, beginning balance 885 [2],[8] 885 [2],[8] 892 [1],[6]
Investment, Identifier [Axis]: YE Brands Holding, LLC | One stop 3      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6]   12  
Fair value, beginning balance 0 [2],[8] 0 [2],[8] 12 [1],[6]
Investment, Identifier [Axis]: YI, LLC | One stop 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[17]   6,036  
Fair value, beginning balance 5,971 [2],[7] 5,971 [2],[7] 6,036 [1],[17]
Investment, Identifier [Axis]: YI, LLC | One stop 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6],[9]   (12)  
Fair value, beginning balance (15) [2],[8],[10] (15) [2],[8],[10] (12) [1],[6],[9]
Investment, Identifier [Axis]: Yorkshire Parent, Inc. | LP interest      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1]   110  
Fair value, beginning balance 99 [2] 99 [2] 110 [1]
Investment, Identifier [Axis]: Yorkshire Parent, Inc. | One stop 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[17],[30]   12,681  
Fair value, beginning balance [1],[17],[30]     12,681
Investment, Identifier [Axis]: Yorkshire Parent, Inc. | One stop 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[30]   11,861  
Fair value, beginning balance [1],[30]     11,861
Investment, Identifier [Axis]: Yorkshire Parent, Inc. | One stop 3      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[30]   3,513  
Fair value, beginning balance [1],[30]     3,513
Investment, Identifier [Axis]: Yorkshire Parent, Inc. | One stop 4      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6]   738  
Fair value, beginning balance [1],[6]     738
Investment, Identifier [Axis]: Yorkshire Parent, Inc. | One stop 5      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6]   379  
Fair value, beginning balance [1],[6]     379
Investment, Identifier [Axis]: Yorkshire Parent, Inc. | Senior secured 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[7],[21] 12,617 12,617  
Investment, Identifier [Axis]: Yorkshire Parent, Inc. | Senior secured 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[8] 1,051 1,051  
Investment, Identifier [Axis]: Yorkshire Parent, Inc. | Senior secured 3      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[21] 11,801 11,801  
Investment, Identifier [Axis]: Yorkshire Parent, Inc. | Senior secured 4      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[21] 3,496 3,496  
Investment, Identifier [Axis]: Yorkshire Parent, Inc. | Senior secured 5      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[8] 2,353 2,353  
Investment, Identifier [Axis]: Yorkshire Parent, Inc. | Senior secured 6      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[8] 3,855 3,855  
Investment, Identifier [Axis]: Zebra Buyer LLC | Senior secured      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[3],[5],[6]   23,672  
Fair value, beginning balance [1],[3],[5],[6]     23,672
Investment, Identifier [Axis]: Zebra Buyer, LLC | Senior secured      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[18],[19],[20] 13,384 13,384  
Investment, Identifier [Axis]: Zendesk, Inc. | One stop      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6]   10,160  
Fair value, beginning balance 9,834 [2],[7],[8] 9,834 [2],[7],[8] 10,160 [1],[6]
Investment, Identifier [Axis]: ZimVie, Inc. | LP interest      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2] 860 860  
Investment, Identifier [Axis]: ZimVie, Inc. | One stop 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[8] 5,615 5,615  
Investment, Identifier [Axis]: ZimVie, Inc. | One stop 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[8] 105,784 105,784  
Investment, Identifier [Axis]: ZimVie, Inc. | One stop 3      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[8],[10] (81) (81)  
Investment, Identifier [Axis]: Zullas, L.C. | One stop 1      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6]   163  
Fair value, beginning balance 218 [2],[8] 218 [2],[8] 163 [1],[6]
Investment, Identifier [Axis]: Zullas, L.C. | One stop 2      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[30]   2,985  
Fair value, beginning balance 2,962 [2],[21] 2,962 [2],[21] 2,985 [1],[30]
Investment, Identifier [Axis]: Zullas, L.C. | One stop 3      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[6],[9]   0  
Fair value, beginning balance 486 [2],[8] 486 [2],[8] 0 [1],[6],[9]
Investment, Identifier [Axis]: bswift, LLC | One stop      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [2],[8] 9,362 9,362  
Investment, Identifier [Axis]: iSolved, Inc. | Senior secured      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]      
Fair value, beginning balance [1],[3],[5],[6]   22,494  
Fair value, beginning balance $ 23,742 [2],[8],[18],[19],[20] $ 23,742 [2],[8],[18],[19],[20] $ 22,494 [1],[3],[5],[6]
Non-qualifying Asset | Investments, at Fair Value | Asset Concentration Risk      
Concentration risk, percentage   19.80% 21.30%
[1] The fair values of investments were valued using significant unobservable inputs, unless otherwise noted. See Note 6. The fair value of loan investments may include the impact of the unfunded commitment being valued below par.
[2] The fair values of investments were valued using significant unobservable inputs, unless otherwise noted. See Note 6. The fair value of loan investments may include the impact of the unfunded commitment being valued below par.
[3]
Denotes that all or a portion of the investment collateralizes the BANA Credit Facility (as defined in Note 7).
[4] The investment is treated as a non-qualifying asset under Section 55(a) of the Investment Company Act of 1940, as amended (the “1940 Act”). Under the 1940 Act, the Company cannot acquire any non-qualifying asset unless, at the time the acquisition is made, qualifying assets represent at least 70% of the Company’s total assets. As of September 30, 2025, total non-qualifying assets at fair value represented 21.3% of the Company’s total assets calculated in accordance with the 1940 Act.
[5] The fair value of this investment was valued using Level 2 inputs. See Note 6.
[6]
Denotes that all or a portion of the investment collateralizes the SMBC Credit Facility (as defined in Note 7).
[7]
Denotes that all or a portion of the investment collateralizes the 2025-R Debt Securitization (as defined in Note 7).
[8]
Denotes that all or a portion of the investment collateralizes the SMBC Credit Facility (as defined in Note 7).
[9] The negative fair value is the result of the capitalized discount on the loan or the unfunded commitment being valued below par. The negative amortized cost is the result of the capitalized discount being greater than the principal amount outstanding on the loan.
[10] The negative fair value is the result of the capitalized discount on the loan or the unfunded commitment being valued below par. The negative amortized cost is the result of the capitalized discount being greater than the principal amount outstanding on the loan.
[11] The headquarters of this portfolio company is located in Jersey.
[12] The sale of a portion of this loan does not qualify for sale accounting under ASC Topic 860 - Transfers and Servicing (“ASC Topic 860”), and therefore, the asset remains in the Consolidated Schedule of Investments. See Note 7.
[13] The headquarters of this portfolio company is located in Jersey.
[14] The sale of a portion of this loan does not qualify for sale accounting under ASC Topic 860 - Transfers and Servicing (“ASC Topic 860”), and therefore, the asset remains in the Consolidated Schedule of Investments. See Note 7.
[15] The investment is treated as a non-qualifying asset under Section 55(a) of the Investment Company Act of 1940, as amended (the “1940 Act”). Under the 1940 Act, the Company cannot acquire any non-qualifying asset unless, at the time the acquisition is made, qualifying assets represent at least 70% of the Company’s total assets. As of June 30, 2026, total non-qualifying assets at fair value represented 19.8% of the Company’s total assets calculated in accordance with the 1940 Act.
[16] The headquarters of this portfolio company is located in the Cayman Islands.
[17]
Denotes that all or a portion of the investment collateralizes the 2025-R Debt Securitization (as defined in Note 7).
[18]
Denotes that all or a portion of the investment collateralizes the 2026-B Debt Securitization (as defined in Note 7).
[19]
Denotes that all or a portion of the investment collateralizes the BANA Credit Facility (as defined in Note 7).
[20] The fair value of this investment was valued using Level 2 inputs. See Note 6.
[21]
Denotes that all or a portion of the investment collateralizes the 2025 Debt Securitization (as defined in Note 7).
[22] All or a portion of the loan interest was capitalized into the outstanding principal balance of the loan in accordance with the terms of the credit agreement during the year ended September 30, 2025.
[23] The headquarters of this portfolio company is located in Spain.
[24] All or a portion of the loan interest was capitalized into the outstanding principal balance of the loan in accordance with the terms of the credit agreement during the nine months ended June 30, 2026.
[25] The headquarters of this portfolio company is located in the United Kingdom.
[26] The headquarters of this portfolio company is located in the United Kingdom.
[27] The headquarters of this portfolio company is located in the Cayman Islands.
[28] The headquarters of this portfolio company is located in Australia.
[29] Investment is denominated in foreign currency and is translated into U.S. dollars as of the valuation date or the date of the transaction. See Note 2.
[30]
Denotes that all or a portion of the investment collateralizes the 2025 Debt Securitization (as defined in Note 7).
[31] Investment is denominated in foreign currency and is translated into U.S. dollars as of the valuation date or the date of the transaction. See Note 2.
[32] The headquarters of this portfolio company is located in the Netherlands.
[33] The headquarters of this portfolio company is located in Canada.
[34] Investment was on non-accrual status as of June 30, 2026, meaning that the Company has ceased recognizing interest or non-cash dividend income on the investment.
[35] The headquarters of this portfolio company is located in France.
[36] The headquarters of this portfolio company is located in France.
[37] The headquarters of this portfolio company is located in Israel.
[38] The headquarters of this portfolio company is located in Luxembourg.
[39] The headquarters of this portfolio company is located in Luxembourg.
[40] The headquarters of this portfolio company is located in Lithuania.
[41] The Company holds an equity investment that is income producing.
[42] The Company holds an equity investment that is income producing.
[43] The headquarters of this portfolio company is located in Germany.
[44] The headquarters of this portfolio company is located in Germany.
[45] The headquarters of this portfolio company is located in Sweden.
[46] Investment was on non-accrual status as of September 30, 2025, meaning that the Company has ceased recognizing interest or non-cash dividend income on the investment.
[47] The headquarters of this portfolio company is located in Australia.
[48] The headquarters of this portfolio company is located in Canada.
[49] The headquarters of this portfolio company is located in Finland.
[50] The headquarters of this portfolio company is located in Finland.
[51] The headquarters of this portfolio company is located in the Netherlands.