v3.26.1
Agreements and Related Party Transactions - Summary of Investments in Non-controlled Affiliates (Details) - USD ($)
$ in Thousands
 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Investments In And Advances To Affiliates [Line Items]    
Fair Value, Beginning balance [1],[2],[3] $ 1,569,418  
Fair Value, Ending balance [4],[5],[6] 1,570,668  
Non-controlled Affiliated Investments    
Investments In And Advances To Affiliates [Line Items]    
Fair Value, Beginning balance 29,594 $ 46,793
Gross Additions 14,582 1,235
Gross Reductions (12,561) (5,022)
Net Realized Gains/ (Losses) 1,598  
Change in Unrealized Gains/ (Losses) (2,160) (411)
Fair Value, Ending balance 31,053 42,595
Dividend, Interest, PIK and Other Income 1,082 2,736
Non-controlled Affiliated Investments | AX VI INV2 Holding AB    
Investments In And Advances To Affiliates [Line Items]    
Fair Value, Beginning balance 18,262 15,110
Gross Additions 406 289
Gross Reductions (12,512)  
Net Realized Gains/ (Losses) 1,598  
Change in Unrealized Gains/ (Losses) (3,170) 1,790
Fair Value, Ending balance 4,584 17,189
Dividend, Interest, PIK and Other Income 456 748
Non-controlled Affiliated Investments | Affordable Care, Inc. (ACI)    
Investments In And Advances To Affiliates [Line Items]    
Gross Additions 7,290  
Change in Unrealized Gains/ (Losses) 6  
Fair Value, Ending balance 7,296  
Dividend, Interest, PIK and Other Income 23  
Non-controlled Affiliated Investments | ASP MCS Acquisition Corp.    
Investments In And Advances To Affiliates [Line Items]    
Fair Value, Beginning balance 60 728
Change in Unrealized Gains/ (Losses) 12 0
Fair Value, Ending balance 72 728
Non-controlled Affiliated Investments | Bayside Opco, LLC    
Investments In And Advances To Affiliates [Line Items]    
Fair Value, Beginning balance 9,918 7,920
Gross Additions 213 205
Gross Reductions (27) (27)
Change in Unrealized Gains/ (Losses) 138 1,294
Fair Value, Ending balance 10,242 9,392
Dividend, Interest, PIK and Other Income 437 562
Non-controlled Affiliated Investments | Isagenix International, LLC    
Investments In And Advances To Affiliates [Line Items]    
Fair Value, Beginning balance 1,354 2,005
Gross Additions 83 164
Gross Reductions (22)  
Change in Unrealized Gains/ (Losses) (269) (445)
Fair Value, Ending balance 1,146 1,724
Dividend, Interest, PIK and Other Income 19 212
Non-controlled Affiliated Investments | Transportation Insight L L C    
Investments In And Advances To Affiliates [Line Items]    
Gross Additions 5,161  
Change in Unrealized Gains/ (Losses) 755  
Fair Value, Ending balance 5,916  
Dividend, Interest, PIK and Other Income 134  
Non-controlled Affiliated Investments | TSX Fiber    
Investments In And Advances To Affiliates [Line Items]    
Gross Additions 1,429  
Change in Unrealized Gains/ (Losses) 368  
Fair Value, Ending balance 1,797  
Dividend, Interest, PIK and Other Income $ 13  
Non-controlled Affiliated Investments | Slickdeals Holdings, LLC    
Investments In And Advances To Affiliates [Line Items]    
Fair Value, Beginning balance   14,766
Gross Additions   577
Gross Reductions   (38)
Change in Unrealized Gains/ (Losses)   (2,332)
Fair Value, Ending balance   12,973
Dividend, Interest, PIK and Other Income   784
Non-controlled Affiliated Investments | Vivid Seats Ltd    
Investments In And Advances To Affiliates [Line Items]    
Fair Value, Beginning balance   910
Change in Unrealized Gains/ (Losses)   (321)
Fair Value, Ending balance   589
Non-controlled Affiliated Investments | WhiteHawk III Onshore Fund L.P.    
Investments In And Advances To Affiliates [Line Items]    
Fair Value, Beginning balance   5,354
Gross Reductions   (4,957)
Change in Unrealized Gains/ (Losses)   (397)
Dividend, Interest, PIK and Other Income   $ 430
[1] All debt investments are income-producing, unless otherwise noted. Equity and member interests are non-income-producing unless otherwise noted. The Company generally acquires its investments in private transactions exempt from registration under the Securities Act. Its investments are therefore generally subject to certain limitations on resale, and may be deemed to be “restricted securities” under the Securities Act.
[2] All positions held are non-controlled/non-affiliated investments, unless otherwise noted, as defined by the 1940 Act. Non-controlled/non-affiliated investments are investments that are neither controlled nor affiliated.
[3] The fair value of the investment was determined using significant unobservable inputs unless otherwise noted, as defined by the 1940 Act. See Note 2 “Summary of Significant Accounting Policies”.
[4] All debt investments are income-producing, unless otherwise noted. Equity and member interests are non-income-producing unless otherwise noted. The Company generally acquires its investments in private transactions exempt from registration under the Securities Act. Its investments are therefore generally subject to certain limitations on resale, and may be deemed to be “restricted securities” under the Securities Act.
[5] All positions held are non-controlled/non-affiliated investments, unless otherwise noted, as defined by the 1940 Act. Non-controlled/non-affiliated investments are investments that are neither controlled nor affiliated.
[6] The fair value of the investment was determined using significant unobservable inputs unless otherwise noted, as defined by the 1940 Act. See Note 2 “Summary of Significant Accounting Policies”.