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Consolidated Schedule of Investments (Parenthetical) - USD ($)
3 Months Ended 12 Months Ended
Mar. 31, 2024
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Schedule of Investments [Line Items]        
Unrealized loss for U.S. federal income tax purposes   $ 146,100,000 $ 400,000 $ 126,200,000
Cost for income tax purposes   13,300,000,000 12,700,000,000 13,100,000,000
Unrealized loss for U.S. federal income tax purposes   560,600,000 325,300,000 382,200,000
Unrealized gain for U.S. federal income tax purposes   414,500,000 324,900,000 256,000,000.0
Total unfunded commitments   1,439,833,000 954,831,000  
Fair Value   13,194,545,000 [1],[2],[3],[4] 12,713,348,000 [5],[6],[7],[8]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [5],[6],[7],[8] $ 12,713,348,000 12,713,348,000    
Net Change in Unrealized Gains (Losses)   (48,419,000) 91,743,000 (88,427,000)
Ending balance   13,194,545,000 [1],[2],[3],[4] 12,713,348,000 [5],[6],[7],[8]  
Dividend income   36,179,000 37,309,000 26,120,000
Restricted investments, fair value   $ 2,210,000,000 $ 2,000,000,000  
Restricted investments as a percentage of net assets   37.10% 32.90%  
Non-qualifying assets as a percent of total assets   12.80% 11.80%  
Subject To 1 Month        
Schedule of Investments [Line Items]        
Interest rate   4.33% 5.35%  
Subject To 3 Months        
Schedule of Investments [Line Items]        
Interest rate   4.31% 5.33%  
Subject To 6 Months        
Schedule of Investments [Line Items]        
Interest rate   4.25% 5.16%  
Subject to 12 Months        
Schedule of Investments [Line Items]        
Interest rate   4.18%    
Prime Rate        
Schedule of Investments [Line Items]        
Interest rate   7.50% 8.50%  
Subject to 1 month EURIBOR        
Schedule of Investments [Line Items]        
Interest rate   2.85% 3.85%  
Subject to 3 months EURIBOR        
Schedule of Investments [Line Items]        
Interest rate   2.71% 3.91%  
Subject to 6 months EURIBOR        
Schedule of Investments [Line Items]        
Interest rate   2.57% 3.86%  
Subject to 3 months BBSY        
Schedule of Investments [Line Items]        
Interest rate   4.42%    
Subject to SONIA        
Schedule of Investments [Line Items]        
Interest rate   4.70% 5.19%  
Non-controlled, affiliated investments        
Schedule of Investments [Line Items]        
Fair Value   $ 235,060,000 $ 19,988,000 6,175,000
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance 19,988,000 19,988,000 6,175,000  
Gross Additions 15,045,000 295,462,000 [9]    
Gross Reductions (2,265,000) (81,341,000) [10]    
Net Change in Unrealized Gains (Losses) 1,033,000 951,000 1,033,000 (49,000)
Ending balance   235,060,000 19,988,000 6,175,000
Interest income 0 2,166,000    
Dividend income 252,000 932,000 252,000 0
Other income 0 40,000 0 0
Investment income from controlled, affiliated investments:        
Schedule of Investments [Line Items]        
Fair Value   1,508,028,000 [11] 1,428,404,000 993,801,000
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance 1,428,404,000 1,428,404,000 993,801,000  
Gross Additions 552,999,000 1,242,399,000 [12]    
Gross Reductions (118,609,000) (1,159,337,000) [13]    
Net Change in Unrealized Gains (Losses) 213,000 (3,438,000) 213,000 45,602,000
Ending balance   1,508,028,000 [11] 1,428,404,000 993,801,000
Interest income 22,108,000 31,974,000    
Dividend income 91,802,000 118,538,000 91,802,000 77,047,000
Other income 942,000 671,000 942,000 689,000
Investment, Identifier [Axis]: 3ES Innovation Inc. (dba Aucerna), First lien senior secured loan        
Schedule of Investments [Line Items]        
Fair Value [14],[15],[16]     60,011,000  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[15],[16] 60,011,000 60,011,000    
Ending balance [14],[15],[16]     60,011,000  
Investment, Identifier [Axis]: 3ES Innovation Inc. (dba Aucerna), First lien senior secured revolving loan        
Schedule of Investments [Line Items]        
Fair Value [14],[16],[17],[18]     2,550,000  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[16],[17],[18] 2,550,000 2,550,000    
Ending balance [14],[16],[17],[18]     2,550,000  
Investment, Identifier [Axis]: 3ES Innovation Inc. (dba Aucerna), First lien senior secured revolving loan 1        
Schedule of Investments [Line Items]        
Funded Commitment     2,550,000  
Total unfunded commitments     1,343,000  
Fair Value [19]     0  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [19] 0 0    
Ending balance [19]     0  
Investment, Identifier [Axis]: AAM Series 1.1 Rail and Domestic Intermodal Feeder, LLC        
Schedule of Investments [Line Items]        
Fair Value     64,839,000 0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance 64,839,000 64,839,000 0  
Gross Additions 64,843,000      
Gross Reductions (35,000)      
Net Change in Unrealized Gains (Losses) 31,000      
Ending balance     64,839,000 0
Interest income 1,899,000      
Dividend income 0      
Other income 0      
Investment, Identifier [Axis]: AAM Series 1.1 Rail and Domestic Intermodal Feeder, LLC(d)        
Schedule of Investments [Line Items]        
Fair Value [20]   75,111,000 64,839,000  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [20] 64,839,000 64,839,000    
Gross Additions [12],[20]   7,797,000    
Gross Reductions [13],[20]   (733,000)    
Net Change in Unrealized Gains (Losses) [20]   3,208,000    
Ending balance [20]   75,111,000 64,839,000  
Interest income [20]   3,930,000    
Dividend income [20]   0    
Other income [20]   0    
Investment, Identifier [Axis]: AAM Series 1.1 Rail and Domestic Intermodal Feeder, LLC, First lien senior secured loan        
Schedule of Investments [Line Items]        
Fair Value   45,105,000 [11],[21],[22] 39,529,000 [14],[16],[23],[24]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[16],[23],[24] 39,529,000 39,529,000    
Ending balance   45,105,000 [11],[21],[22] 39,529,000 [14],[16],[23],[24]  
Investment, Identifier [Axis]: AAM Series 1.1 Rail and Domestic Intermodal Feeder, LLC, LLC Interest        
Schedule of Investments [Line Items]        
Fair Value [1],[11],[22],[25],[26]   30,006,000    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Ending balance [1],[11],[22],[25],[26]   30,006,000    
Investment, Identifier [Axis]: AAM Series 1.1 Rail and Domestic Intermodal Feeder, LLC, LLC Interest 1        
Schedule of Investments [Line Items]        
Funded Commitment   26,763,000    
Total unfunded commitments   59,032,000    
Fair Value [27]   0    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Ending balance [27]   0    
Investment, Identifier [Axis]: AAM Series 1.1 Rail and Domestic Intermodal Feeder, LLC, LLC Interest        
Schedule of Investments [Line Items]        
Fair Value [14],[16],[17],[23],[28],[29]     25,310,000  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[16],[17],[23],[28],[29] 25,310,000 25,310,000    
Ending balance [14],[16],[17],[23],[28],[29]     25,310,000  
Investment, Identifier [Axis]: AAM Series 1.1 Rail and Domestic Intermodal Feeder, LLC, LLC Interest 1        
Schedule of Investments [Line Items]        
Funded Commitment     25,310,000  
Total unfunded commitments     5,324,000  
Fair Value [19]     0  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [19] 0 0    
Ending balance [19]     0  
Investment, Identifier [Axis]: AAM Series 2.1 Aviation Feeder, LLC        
Schedule of Investments [Line Items]        
Fair Value     78,476,000 1,568,000
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance 78,476,000 78,476,000 1,568,000  
Gross Additions 76,910,000      
Gross Reductions (1,000)      
Net Change in Unrealized Gains (Losses) (1,000)      
Ending balance     78,476,000 1,568,000
Interest income 617,000      
Dividend income 0      
Other income 0      
Investment, Identifier [Axis]: AAM Series 2.1 Aviation Feeder, LLC(d)        
Schedule of Investments [Line Items]        
Fair Value [20]   77,680,000 78,476,000  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [20] 78,476,000 78,476,000    
Gross Additions [12],[20]   33,466,000    
Gross Reductions [13],[20]   (40,675,000)    
Net Change in Unrealized Gains (Losses) [20]   6,413,000    
Ending balance [20]   77,680,000 78,476,000  
Interest income [20]   6,065,000    
Dividend income [20]   0    
Other income [20]   0    
Investment, Identifier [Axis]: AAM Series 2.1 Aviation Feeder, LLC, First lien senior secured loan        
Schedule of Investments [Line Items]        
Fair Value   45,630,000 [11],[21],[22] 46,970,000 [14],[16],[23],[24]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[16],[23],[24] 46,970,000 46,970,000    
Ending balance   45,630,000 [11],[21],[22] 46,970,000 [14],[16],[23],[24]  
Investment, Identifier [Axis]: AAM Series 2.1 Aviation Feeder, LLC, LLC Interest        
Schedule of Investments [Line Items]        
Fair Value   32,050,000 [1],[11],[22],[25],[26] 31,506,000 [14],[16],[17],[23],[28],[29]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[16],[17],[23],[28],[29] 31,506,000 31,506,000    
Ending balance   32,050,000 [1],[11],[22],[25],[26] 31,506,000 [14],[16],[17],[23],[28],[29]  
Investment, Identifier [Axis]: AAM Series 2.1 Aviation Feeder, LLC, LLC Interest 1        
Schedule of Investments [Line Items]        
Funded Commitment   25,601,000 31,506,000  
Total unfunded commitments   27,444,000 309,000  
Fair Value   0 [27] 0 [19]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [19] 0 0    
Ending balance   0 [27] 0 [19]  
Investment, Identifier [Axis]: ABB/Con-cise Optical Group LLC, First lien senior secured loan        
Schedule of Investments [Line Items]        
Fair Value   62,503,000 [11],[30] 61,387,000 [14],[15]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[15] 61,387,000 61,387,000    
Ending balance   62,503,000 [11],[30] 61,387,000 [14],[15]  
Investment, Identifier [Axis]: AI Titan Parent, Inc. (dba Prometheus Group), First lien senior secured delayed draw term loan        
Schedule of Investments [Line Items]        
Funded Commitment   0    
Total unfunded commitments   151,000    
Fair Value [27]   (1,000)    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Ending balance [27]   (1,000)    
Investment, Identifier [Axis]: AI Titan Parent, Inc. (dba Prometheus Group), First lien senior secured loan        
Schedule of Investments [Line Items]        
Fair Value [11],[31]   747,000    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Ending balance [11],[31]   747,000    
Investment, Identifier [Axis]: AI Titan Parent, Inc. (dba Prometheus Group), First lien senior secured revolving loan        
Schedule of Investments [Line Items]        
Funded Commitment   0    
Total unfunded commitments   94,000    
Fair Value [27]   (1,000)    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Ending balance [27]   (1,000)    
Investment, Identifier [Axis]: ASP Conair Holdings LP, Class A Units        
Schedule of Investments [Line Items]        
Fair Value   6,600,000 [1],[11],[26] 5,736,000 [14],[28],[29]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[28],[29] 5,736,000 5,736,000    
Ending balance   6,600,000 [1],[11],[26] 5,736,000 [14],[28],[29]  
Investment, Identifier [Axis]: Accelerate Topco Holdings, LLC, Common Units        
Schedule of Investments [Line Items]        
Fair Value   24,000 [1],[11],[26] 17,000 [14],[28],[29]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[28],[29] 17,000 17,000    
Ending balance   24,000 [1],[11],[26] 17,000 [14],[28],[29]  
Investment, Identifier [Axis]: Access CIG, LLC, Second lien senior secured loan        
Schedule of Investments [Line Items]        
Fair Value [14],[15]     58,760,000  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[15] 58,760,000 58,760,000    
Ending balance [14],[15]     58,760,000  
Investment, Identifier [Axis]: Advancion Holdings, LLC (fka Aruba Investments Holdings, LLC), Second lien senior secured loan        
Schedule of Investments [Line Items]        
Fair Value   9,746,000 [11],[31],[32] 9,350,000 [14],[18]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[18] 9,350,000 9,350,000    
Ending balance   9,746,000 [11],[31],[32] 9,350,000 [14],[18]  
Investment, Identifier [Axis]: Aerosmith Bidco 1 Limited (dba Audiotonix), First lien senior secured delayed draw term loan        
Schedule of Investments [Line Items]        
Funded Commitment   0    
Total unfunded commitments   62,563,000    
Fair Value [27]   (49,000)    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Ending balance [27]   (49,000)    
Investment, Identifier [Axis]: Aerosmith Bidco 1 Limited (dba Audiotonix), First lien senior secured loan        
Schedule of Investments [Line Items]        
Fair Value [11],[22],[31]   196,306,000    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Ending balance [11],[22],[31]   196,306,000    
Investment, Identifier [Axis]: Aerosmith Bidco 1 Limited (dba Audiotonix), First lien senior secured revolving loan        
Schedule of Investments [Line Items]        
Funded Commitment   0    
Total unfunded commitments   26,072,000    
Fair Value [27]   (65,000)    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Ending balance [27]   (65,000)    
Investment, Identifier [Axis]: Alera Group, Inc., First lien senior secured loan        
Schedule of Investments [Line Items]        
Fair Value   34,109,000 [11],[25],[31] 34,461,000 [14],[18]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[18] 34,461,000 34,461,000    
Ending balance   34,109,000 [11],[25],[31] 34,461,000 [14],[18]  
Investment, Identifier [Axis]: Allied Benefit Systems Intermediate LLC, First lien senior secured delayed draw term loan        
Schedule of Investments [Line Items]        
Funded Commitment     0  
Total unfunded commitments     155,000  
Fair Value [19]     (1,000)  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [19] (1,000) (1,000)    
Ending balance [19]     (1,000)  
Investment, Identifier [Axis]: Allied Benefit Systems Intermediate LLC, First lien senior secured loan        
Schedule of Investments [Line Items]        
Fair Value   993,000 [11],[25],[31] 833,000 [14],[15]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[15] 833,000 833,000    
Ending balance   993,000 [11],[25],[31] 833,000 [14],[15]  
Investment, Identifier [Axis]: AlphaSense, Inc., First lien senior secured delayed draw term loan 1        
Schedule of Investments [Line Items]        
Funded Commitment   0    
Total unfunded commitments   143,000    
Fair Value [27]   (1,000)    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Ending balance [27]   (1,000)    
Investment, Identifier [Axis]: AlphaSense, Inc., First lien senior secured delayed draw term loan 2        
Schedule of Investments [Line Items]        
Funded Commitment   0    
Total unfunded commitments   141,000    
Fair Value [27]   (1,000)    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Ending balance [27]   (1,000)    
Investment, Identifier [Axis]: AlphaSense, Inc., First lien senior secured loan        
Schedule of Investments [Line Items]        
Fair Value [11],[30]   700,000    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Ending balance [11],[30]   700,000    
Investment, Identifier [Axis]: AlphaSense, LLC, Series E Preferred Shares        
Schedule of Investments [Line Items]        
Fair Value [1],[11],[26]   152,000    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Ending balance [1],[11],[26]   152,000    
Investment, Identifier [Axis]: Amergin Asset Management, LLC, Class A Units        
Schedule of Investments [Line Items]        
Fair Value   778,000 [1],[11],[26] 0 [14],[16],[28],[29]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[16],[28],[29] 0 0    
Ending balance   778,000 [1],[11],[26] 0 [14],[16],[28],[29]  
Investment, Identifier [Axis]: AmeriLife Holdings LLC, First lien senior secured delayed draw term loan        
Schedule of Investments [Line Items]        
Funded Commitment   88,000    
Total unfunded commitments   94,000    
Fair Value   0 [27] 149,000 [14],[15],[17],[33]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[15],[17],[33] 149,000 149,000    
Ending balance   0 [27] 149,000 [14],[15],[17],[33]  
Investment, Identifier [Axis]: AmeriLife Holdings LLC, First lien senior secured delayed draw term loan 1        
Schedule of Investments [Line Items]        
Funded Commitment     150,000  
Total unfunded commitments     30,000  
Fair Value [19]     0  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [19] 0 0    
Ending balance [19]     0  
Investment, Identifier [Axis]: AmeriLife Holdings LLC, First lien senior secured delayed draw term loan 2        
Schedule of Investments [Line Items]        
Funded Commitment     0  
Total unfunded commitments     153,000  
Fair Value [19]     0  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [19] 0 0    
Ending balance [19]     0  
Investment, Identifier [Axis]: AmeriLife Holdings LLC, First lien senior secured loan        
Schedule of Investments [Line Items]        
Fair Value   1,125,000 [11],[25],[30] 716,000 [14],[18]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[18] 716,000 716,000    
Ending balance   1,125,000 [11],[25],[30] 716,000 [14],[18]  
Investment, Identifier [Axis]: AmeriLife Holdings LLC, First lien senior secured revolving loan        
Schedule of Investments [Line Items]        
Funded Commitment   0 0  
Total unfunded commitments   91,000 91,000  
Fair Value   0 [27] 0 [19]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [19] 0 0    
Ending balance   0 [27] 0 [19]  
Investment, Identifier [Axis]: Anaplan, Inc., First lien senior secured loan        
Schedule of Investments [Line Items]        
Fair Value   139,134,000 [11],[25],[30] 135,082,000 [14],[15]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[15] 135,082,000 135,082,000    
Ending balance   139,134,000 [11],[25],[30] 135,082,000 [14],[15]  
Investment, Identifier [Axis]: Anaplan, Inc., First lien senior secured revolving loan        
Schedule of Investments [Line Items]        
Funded Commitment   0 0  
Total unfunded commitments   9,722,000 9,722,000  
Fair Value   0 [27] 0 [19]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [19] 0 0    
Ending balance   0 [27] 0 [19]  
Investment, Identifier [Axis]: Apex Group Treasury LLC, Second lien senior secured loan        
Schedule of Investments [Line Items]        
Fair Value [14],[15],[16]     43,926,000  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[15],[16] 43,926,000 43,926,000    
Ending balance [14],[15],[16]     43,926,000  
Investment, Identifier [Axis]: Apex Service Partners, LLC, First lien senior secured delayed draw term loan        
Schedule of Investments [Line Items]        
Fair Value [14],[15],[17],[33]     1,279,000  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[15],[17],[33] 1,279,000 1,279,000    
Ending balance [14],[15],[17],[33]     1,279,000  
Investment, Identifier [Axis]: Apex Service Partners, LLC, First lien senior secured delayed draw term loan 1        
Schedule of Investments [Line Items]        
Funded Commitment     1,374,000  
Total unfunded commitments     4,807,000  
Fair Value [19]     0  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [19] 0 0    
Ending balance [19]     0  
Investment, Identifier [Axis]: Apex Service Partners, LLC, First lien senior secured loan        
Schedule of Investments [Line Items]        
Fair Value [14],[15]     25,196,000  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[15] 25,196,000 25,196,000    
Ending balance [14],[15]     25,196,000  
Investment, Identifier [Axis]: Apex Service Partners, LLC, First lien senior secured revolving loan        
Schedule of Investments [Line Items]        
Fair Value [14],[15],[17]     113,000  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[15],[17] 113,000 113,000    
Ending balance [14],[15],[17]     113,000  
Investment, Identifier [Axis]: Apex Service Partners, LLC, First lien senior secured revolving loan 1        
Schedule of Investments [Line Items]        
Funded Commitment     165,000  
Total unfunded commitments     1,895,000  
Fair Value [19]     0  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [19] 0 0    
Ending balance [19]     0  
Investment, Identifier [Axis]: Applied Composites Holdings, LLC (fka AC&A Enterprises Holdings, LLC), First lien senior secured loan        
Schedule of Investments [Line Items]        
Fair Value [25],[30]   21,290,000    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Ending balance [25],[30]   21,290,000    
Investment, Identifier [Axis]: Applied Composites Holdings, LLC (fka AC&A Enterprises Holdings, LLC), First lien senior secured revolving loan        
Schedule of Investments [Line Items]        
Fair Value [30]   1,907,000    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Ending balance [30]   1,907,000    
Investment, Identifier [Axis]: Applied Composites Holdings, LLC (fka AC&A Enterprises Holdings, LLC), First lien senior secured revolving loan 1        
Schedule of Investments [Line Items]        
Funded Commitment   3,051,000    
Total unfunded commitments   0    
Fair Value [27]   0    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Ending balance [27]   0    
Investment, Identifier [Axis]: Aptean Acquiror, Inc. (dba Aptean), First lien senior secured delayed draw term loan        
Schedule of Investments [Line Items]        
Funded Commitment   14,000    
Total unfunded commitments   40,000    
Fair Value [27]   0    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Ending balance [27]   0    
Investment, Identifier [Axis]: Aptean Acquiror, Inc. (dba Aptean), First lien senior secured loan        
Schedule of Investments [Line Items]        
Fair Value [11],[25],[30]   870,000    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Ending balance [11],[25],[30]   870,000    
Investment, Identifier [Axis]: Aptean Acquiror, Inc. (dba Aptean), First lien senior secured revolving loan        
Schedule of Investments [Line Items]        
Funded Commitment   0    
Total unfunded commitments   73,000    
Fair Value [27]   0    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Ending balance [27]   0    
Investment, Identifier [Axis]: Aptive Environmental, LLC, First lien senior secured loan        
Schedule of Investments [Line Items]        
Fair Value [14],[24]     13,311,000  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[24] 13,311,000 13,311,000    
Ending balance [14],[24]     13,311,000  
Investment, Identifier [Axis]: Arctic Holdco, LLC (dba Novvia Group), First lien senior secured delayed draw term loan        
Schedule of Investments [Line Items]        
Funded Commitment     0  
Total unfunded commitments     7,500,000  
Fair Value [19]     (150,000)  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [19] (150,000) (150,000)    
Ending balance [19]     (150,000)  
Investment, Identifier [Axis]: Arctic Holdco, LLC (dba Novvia Group), First lien senior secured loan        
Schedule of Investments [Line Items]        
Fair Value   15,956,000 [11],[25],[31] 10,264,000 [14],[15]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[15] 10,264,000 10,264,000    
Ending balance   15,956,000 [11],[25],[31] 10,264,000 [14],[15]  
Investment, Identifier [Axis]: Ardonagh Midco 2 PLC, Unsecured notes        
Schedule of Investments [Line Items]        
Fair Value [14],[16],[24],[34]     11,793,000  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[16],[24],[34] 11,793,000 11,793,000    
Ending balance [14],[16],[24],[34]     11,793,000  
Investment, Identifier [Axis]: Ardonagh Midco 3 PLC, First lien senior secured EUR delayed draw term loan        
Schedule of Investments [Line Items]        
Fair Value [14],[16],[35]     10,389,000  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[16],[35] 10,389,000 10,389,000    
Ending balance [14],[16],[35]     10,389,000  
Investment, Identifier [Axis]: Ardonagh Midco 3 PLC, First lien senior secured EUR term loan        
Schedule of Investments [Line Items]        
Fair Value [14],[16],[35]     10,090,000  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[16],[35] 10,090,000 10,090,000    
Ending balance [14],[16],[35]     10,090,000  
Investment, Identifier [Axis]: Ardonagh Midco 3 PLC, First lien senior secured GBP term loan        
Schedule of Investments [Line Items]        
Fair Value [14],[16],[36]     110,472,000  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[16],[36] 110,472,000 110,472,000    
Ending balance [14],[16],[36]     110,472,000  
Investment, Identifier [Axis]: Ardonagh Midco 3 PLC, First lien senior secured USD term loan        
Schedule of Investments [Line Items]        
Fair Value [14],[16],[37]     26,784,000  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[16],[37] 26,784,000 26,784,000    
Ending balance [14],[16],[37]     26,784,000  
Investment, Identifier [Axis]: Armstrong Bidco Limited (dba The Access Group), First lien senior secured loan        
Schedule of Investments [Line Items]        
Fair Value [14],[16],[36]     3,745,000  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[16],[36] 3,745,000 3,745,000    
Ending balance [14],[16],[36]     3,745,000  
Investment, Identifier [Axis]: Armstrong Bidco Limited, First lien senior secured GBP delayed draw term loan        
Schedule of Investments [Line Items]        
Fair Value [11],[22],[25],[38]   3,689,000    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Ending balance [11],[22],[25],[38]   3,689,000    
Investment, Identifier [Axis]: Artifact Bidco, Inc. (dba Avetta), First lien senior secured delayed draw term loan        
Schedule of Investments [Line Items]        
Funded Commitment   0    
Total unfunded commitments   2,228,000    
Fair Value [27]   0    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Ending balance [27]   0    
Investment, Identifier [Axis]: Artifact Bidco, Inc. (dba Avetta), First lien senior secured loan        
Schedule of Investments [Line Items]        
Fair Value [11],[30]   9,059,000    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Ending balance [11],[30]   9,059,000    
Investment, Identifier [Axis]: Artifact Bidco, Inc. (dba Avetta), First lien senior secured revolving loan        
Schedule of Investments [Line Items]        
Funded Commitment   0    
Total unfunded commitments   1,592,000    
Fair Value [27]   (8,000)    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Ending balance [27]   (8,000)    
Investment, Identifier [Axis]: Ascend Buyer, LLC (dba PPC Flexible Packaging), First lien senior secured loan        
Schedule of Investments [Line Items]        
Fair Value   5,387,000 [11],[30] 5,429,000 [14],[15]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[15] 5,429,000 5,429,000    
Ending balance   5,387,000 [11],[30] 5,429,000 [14],[15]  
Investment, Identifier [Axis]: Ascend Buyer, LLC (dba PPC Flexible Packaging), First lien senior secured revolving loan        
Schedule of Investments [Line Items]        
Fair Value   188,000 [11],[25],[30] 187,000 [14],[17],[18]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[17],[18] 187,000 187,000    
Ending balance   188,000 [11],[25],[30] 187,000 [14],[17],[18]  
Investment, Identifier [Axis]: Ascend Buyer, LLC (dba PPC Flexible Packaging), First lien senior secured revolving loan 1        
Schedule of Investments [Line Items]        
Funded Commitment   188,000 188,000  
Total unfunded commitments   377,000 377,000  
Fair Value   0 [27] 0 [19]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [19] 0 0    
Ending balance   0 [27] 0 [19]  
Investment, Identifier [Axis]: Associations Finance, Inc., Preferred Stock        
Schedule of Investments [Line Items]        
Fair Value [14],[24],[29]     63,862,000  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[24],[29] 63,862,000 63,862,000    
Ending balance [14],[24],[29]     63,862,000  
Investment, Identifier [Axis]: Associations Finance, Inc., Unsecured notes        
Schedule of Investments [Line Items]        
Fair Value [11],[21]   144,093,000    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Ending balance [11],[21]   144,093,000    
Investment, Identifier [Axis]: Associations, Inc., First lien senior secured delayed draw term loan        
Schedule of Investments [Line Items]        
Funded Commitment   4,631,000    
Total unfunded commitments   23,118,000    
Fair Value   0 [27] 11,468,000 [14],[15],[17]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[15],[17] 11,468,000 11,468,000    
Ending balance   0 [27] 11,468,000 [14],[15],[17]  
Investment, Identifier [Axis]: Associations, Inc., First lien senior secured delayed draw term loan 1        
Schedule of Investments [Line Items]        
Funded Commitment     49,653,000  
Total unfunded commitments     412,000  
Fair Value [19]     0  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [19] 0 0    
Ending balance [19]     0  
Investment, Identifier [Axis]: Associations, Inc., First lien senior secured loan        
Schedule of Investments [Line Items]        
Fair Value   372,912,000 [11],[25],[30] 413,466,000 [14],[15],[17]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[15],[17] 413,466,000 413,466,000    
Ending balance   372,912,000 [11],[25],[30] 413,466,000 [14],[15],[17]  
Investment, Identifier [Axis]: Associations, Inc., First lien senior secured revolving loan        
Schedule of Investments [Line Items]        
Funded Commitment   11,117,000 11,633,000  
Total unfunded commitments   11,117,000 21,290,000  
Fair Value   0 [27] 0 [19]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [19] 0 0    
Ending balance   0 [27] 0 [19]  
Investment, Identifier [Axis]: Atlanta Custom Windows, LLC        
Schedule of Investments [Line Items]        
Fair Value     11,500,000  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance 11,500,000 11,500,000    
Ending balance     11,500,000  
Investment, Identifier [Axis]: Atlanta Custom Windows, LLC        
Schedule of Investments [Line Items]        
Fair Value   11,500,000    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Ending balance   11,500,000    
Investment, Identifier [Axis]: Aurelia Netherlands B.V., First lien senior secured EUR term loan        
Schedule of Investments [Line Items]        
Fair Value [11],[22],[39]   51,715,000    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Ending balance [11],[22],[39]   51,715,000    
Investment, Identifier [Axis]: Aurelia Netherlands Midco 2 B.V., First lien senior secured EUR revolving loan        
Schedule of Investments [Line Items]        
Funded Commitment     0  
Total unfunded commitments     3,089,000  
Fair Value [19]     0  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [19] 0 0    
Ending balance [19]     0  
Investment, Identifier [Axis]: Aurelia Netherlands Midco 2 B.V., First lien senior secured EUR term loan        
Schedule of Investments [Line Items]        
Funded Commitment     0  
Total unfunded commitments     27,804,000  
Fair Value [19]     0  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [19] 0 0    
Ending balance [19]     0  
Investment, Identifier [Axis]: Aurelia Netherlands Midco 2 B.V., First lien senior secured NOK term loan        
Schedule of Investments [Line Items]        
Funded Commitment     0  
Total unfunded commitments     29,096,000  
Fair Value [19]     0  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [19] 0 0    
Ending balance [19]     0  
Investment, Identifier [Axis]: Aviation Solutions Midco, LLC (dba STS Aviation), First lien senior secured loan        
Schedule of Investments [Line Items]        
Fair Value [14],[15]     213,873,000  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[15] 213,873,000 213,873,000    
Ending balance [14],[15]     213,873,000  
Investment, Identifier [Axis]: Azurite Intermediate Holdings, Inc. (dba Alteryx, Inc.), First lien senior secured loan        
Schedule of Investments [Line Items]        
Fair Value [11],[25],[31]   11,880,000    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Ending balance [11],[25],[31]   11,880,000    
Investment, Identifier [Axis]: Azurite Intermediate Holdings, Inc. (dba Alteryx, Inc.), First lien senior secured revolving loan        
Schedule of Investments [Line Items]        
Funded Commitment   0    
Total unfunded commitments   1,330,000    
Fair Value [27]   (10,000)    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Ending balance [27]   (10,000)    
Investment, Identifier [Axis]: BCPE Osprey Buyer, Inc. (dba PartsSource), First lien senior secured delayed draw term loan        
Schedule of Investments [Line Items]        
Funded Commitment     0  
Total unfunded commitments     25,500,000  
Fair Value   9,966,000 [11],[25],[31] (64,000) [19]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [19] (64,000) (64,000)    
Ending balance   9,966,000 [11],[25],[31] (64,000) [19]  
Investment, Identifier [Axis]: BCPE Osprey Buyer, Inc. (dba PartsSource), First lien senior secured delayed draw term loan 1        
Schedule of Investments [Line Items]        
Funded Commitment   4,391,000    
Total unfunded commitments   21,075,000    
Fair Value [27]   0    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Ending balance [27]   0    
Investment, Identifier [Axis]: BCPE Osprey Buyer, Inc. (dba PartsSource), First lien senior secured loan        
Schedule of Investments [Line Items]        
Fair Value   109,247,000 [11],[30] 116,114,000 [14],[15]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[15] 116,114,000 116,114,000    
Ending balance   109,247,000 [11],[30] 116,114,000 [14],[15]  
Investment, Identifier [Axis]: BCPE Osprey Buyer, Inc. (dba PartsSource), First lien senior secured revolving loan        
Schedule of Investments [Line Items]        
Fair Value   7,755,000 [11],[25],[31] 3,540,000 [14],[17],[18]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[17],[18] 3,540,000 3,540,000    
Ending balance   7,755,000 [11],[25],[31] 3,540,000 [14],[17],[18]  
Investment, Identifier [Axis]: BCPE Osprey Buyer, Inc. (dba PartsSource), First lien senior secured revolving loan 1        
Schedule of Investments [Line Items]        
Funded Commitment   7,904,000 3,688,000  
Total unfunded commitments   3,952,000 8,167,000  
Fair Value   0 [27] 0 [19]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [19] 0 0    
Ending balance   0 [27] 0 [19]  
Investment, Identifier [Axis]: BCPE Watson (DE) ORML, LP, First lien senior secured loan        
Schedule of Investments [Line Items]        
Fair Value [14],[16],[37],[40]     14,925,000  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[16],[37],[40] 14,925,000 14,925,000    
Ending balance [14],[16],[37],[40]     14,925,000  
Investment, Identifier [Axis]: BCTO BSI Buyer, Inc. (dba Buildertrend), First lien senior secured loan        
Schedule of Investments [Line Items]        
Fair Value   60,032,000 [11],[30] 56,210,000 [14],[15]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[15] 56,210,000 56,210,000    
Ending balance   60,032,000 [11],[30] 56,210,000 [14],[15]  
Investment, Identifier [Axis]: BCTO BSI Buyer, Inc. (dba Buildertrend), First lien senior secured revolving loan        
Schedule of Investments [Line Items]        
Funded Commitment   0 0  
Total unfunded commitments   8,036,000 8,036,000  
Fair Value   0 [27] 0 [19]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [19] 0 0    
Ending balance   0 [27] 0 [19]  
Investment, Identifier [Axis]: BCTO WIW Holdings, Inc. (dba When I Work), Class A Common Stock        
Schedule of Investments [Line Items]        
Fair Value   711,000 [1],[11],[26] 1,019,000 [14],[28],[29]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[28],[29] 1,019,000 1,019,000    
Ending balance   711,000 [1],[11],[26] 1,019,000 [14],[28],[29]  
Investment, Identifier [Axis]: BEHP Co-Investor II, L.P., LP Interest        
Schedule of Investments [Line Items]        
Fair Value   1,297,000 [1],[11],[22],[26] 1,278,000 [14],[16],[28],[29]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[16],[28],[29] 1,278,000 1,278,000    
Ending balance   1,297,000 [1],[11],[22],[26] 1,278,000 [14],[16],[28],[29]  
Investment, Identifier [Axis]: BP Veraison Buyer, LLC (dba Sun World), First lien senior secured loan        
Schedule of Investments [Line Items]        
Fair Value   91,808,000 [11],[25],[30] 67,986,000 [14],[15]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[15] 67,986,000 67,986,000    
Ending balance   91,808,000 [11],[25],[30] 67,986,000 [14],[15]  
Investment, Identifier [Axis]: BP Veraison Buyer, LLC (dba Sun World), First lien senior secured revolving loan        
Schedule of Investments [Line Items]        
Funded Commitment   0 0  
Total unfunded commitments   18,478,000 8,716,000  
Fair Value   0 [27] 0 [19]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [19] 0 0    
Ending balance   0 [27] 0 [19]  
Investment, Identifier [Axis]: Baker Tilly Advisory Group, L.P., First lien senior secured delayed draw term loan        
Schedule of Investments [Line Items]        
Funded Commitment   0    
Total unfunded commitments   8,762,000    
Fair Value [27]   0    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Ending balance [27]   0    
Investment, Identifier [Axis]: Baker Tilly Advisory Group, L.P., First lien senior secured loan        
Schedule of Investments [Line Items]        
Fair Value [11],[31]   57,774,000    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Ending balance [11],[31]   57,774,000    
Investment, Identifier [Axis]: Baker Tilly Advisory Group, L.P., First lien senior secured revolving loan        
Schedule of Investments [Line Items]        
Funded Commitment   0    
Total unfunded commitments   12,278,000    
Fair Value [27]   (61,000)    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Ending balance [27]   (61,000)    
Investment, Identifier [Axis]: Balrog Acquisition, Inc. (dba Bakemark), Second lien senior secured loan        
Schedule of Investments [Line Items]        
Fair Value   22,000,000 [11],[30] 21,725,000 [14],[18]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[18] 21,725,000 21,725,000    
Ending balance   22,000,000 [11],[30] 21,725,000 [14],[18]  
Investment, Identifier [Axis]: Bamboo US BidCo LLC, First lien senior secured EUR term loan        
Schedule of Investments [Line Items]        
Fair Value   3,250,000 [11],[39] 3,282,000 [14],[41]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[41] 3,282,000 3,282,000    
Ending balance   3,250,000 [11],[39] 3,282,000 [14],[41]  
Investment, Identifier [Axis]: Bamboo US BidCo LLC, First lien senior secured delayed draw term loan        
Schedule of Investments [Line Items]        
Fair Value [14],[17],[18],[33]     40,000  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[17],[18],[33] 40,000 40,000    
Ending balance [14],[17],[18],[33]     40,000  
Investment, Identifier [Axis]: Bamboo US BidCo LLC, First lien senior secured delayed draw term loan 1        
Schedule of Investments [Line Items]        
Funded Commitment   0 53,000  
Total unfunded commitments   1,372,000 716,000  
Fair Value   0 [27] 0 [19]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [19] 0 0    
Ending balance   0 [27] 0 [19]  
Investment, Identifier [Axis]: Bamboo US BidCo LLC, First lien senior secured delayed draw term loan 2        
Schedule of Investments [Line Items]        
Funded Commitment   457,000    
Total unfunded commitments   315,000    
Fair Value [27]   0    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Ending balance [27]   0    
Investment, Identifier [Axis]: Bamboo US BidCo LLC, First lien senior secured loan        
Schedule of Investments [Line Items]        
Fair Value   5,544,000 [11],[25],[30] 4,775,000 [14],[15]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[15] 4,775,000 4,775,000    
Ending balance   5,544,000 [11],[25],[30] 4,775,000 [14],[15]  
Investment, Identifier [Axis]: Bamboo US BidCo LLC, First lien senior secured revolving loan        
Schedule of Investments [Line Items]        
Funded Commitment   0 0  
Total unfunded commitments   1,026,000 1,026,000  
Fair Value   0 [27] (31,000) [19]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [19] (31,000) (31,000)    
Ending balance   0 [27] (31,000) [19]  
Investment, Identifier [Axis]: Barracuda Networks, Inc., First lien senior secured loan        
Schedule of Investments [Line Items]        
Fair Value [30],[32]   11,807,000    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Ending balance [30],[32]   11,807,000    
Investment, Identifier [Axis]: Bayshore Intermediate #2, L.P. (dba Boomi), First lien senior secured loan        
Schedule of Investments [Line Items]        
Fair Value   71,430,000 [11],[30] 104,298,000 [14],[15]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[15] 104,298,000 104,298,000    
Ending balance   71,430,000 [11],[30] 104,298,000 [14],[15]  
Investment, Identifier [Axis]: Bayshore Intermediate #2, L.P. (dba Boomi), First lien senior secured revolving loan        
Schedule of Investments [Line Items]        
Funded Commitment   0    
Total unfunded commitments   6,155,000    
Fair Value   0 [27] 1,296,000 [14],[15],[17]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[15],[17] 1,296,000 1,296,000    
Ending balance   0 [27] 1,296,000 [14],[15],[17]  
Investment, Identifier [Axis]: Bayshore Intermediate #2, L.P. (dba Boomi), First lien senior secured revolving loan 1        
Schedule of Investments [Line Items]        
Funded Commitment     1,383,000  
Total unfunded commitments     5,531,000  
Fair Value [19]     0  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [19] 0 0    
Ending balance [19]     0  
Investment, Identifier [Axis]: Bird Holding B.V. (fka MessageBird Holding B.V.), Extended Series C Warrants        
Schedule of Investments [Line Items]        
Fair Value [1],[11],[22],[26]   180,000    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Ending balance [1],[11],[22],[26]   180,000    
Investment, Identifier [Axis]: Blackhawk Network Holdings, Inc., First lien senior secured loan        
Schedule of Investments [Line Items]        
Fair Value [11],[31],[32]   75,453,000    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Ending balance [11],[31],[32]   75,453,000    
Investment, Identifier [Axis]: Blackhawk Network Holdings, Inc., Second lien senior secured loan        
Schedule of Investments [Line Items]        
Fair Value [14],[18]     106,400,000  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[18] 106,400,000 106,400,000    
Ending balance [14],[18]     106,400,000  
Investment, Identifier [Axis]: Blast Bidco Inc. (dba Bazooka Candy Brands), First lien senior secured loan        
Schedule of Investments [Line Items]        
Fair Value   29,331,000 [11],[30] 28,813,000 [14],[15]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[15] 28,813,000 28,813,000    
Ending balance   29,331,000 [11],[30] 28,813,000 [14],[15]  
Investment, Identifier [Axis]: Blast Bidco Inc. (dba Bazooka Candy Brands), First lien senior secured revolving loan        
Schedule of Investments [Line Items]        
Funded Commitment   0 0  
Total unfunded commitments   3,448,000 3,448,000  
Fair Value   0 [27] (86,000) [19]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [19] (86,000) (86,000)    
Ending balance   0 [27] (86,000) [19]  
Investment, Identifier [Axis]: Blend Labs, Inc., Common stock        
Schedule of Investments [Line Items]        
Fair Value [14],[28],[42]     184,000  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[28],[42] 184,000 184,000    
Ending balance [14],[28],[42]     184,000  
Investment, Identifier [Axis]: Blend Labs, Inc., First lien senior secured loan        
Schedule of Investments [Line Items]        
Fair Value [14],[18]     40,950,000  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[18] 40,950,000 40,950,000    
Ending balance [14],[18]     40,950,000  
Investment, Identifier [Axis]: Blend Labs, Inc., Warrants        
Schedule of Investments [Line Items]        
Fair Value   8,000 [1],[11],[26] 9,000 [14],[28],[29]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[28],[29] 9,000 9,000    
Ending balance   8,000 [1],[11],[26] 9,000 [14],[28],[29]  
Investment, Identifier [Axis]: Blue Owl Capital Corporation Senior Loan Fund LLC (fka ORCC Senior Loan Fund LLC)(c)        
Schedule of Investments [Line Items]        
Fair Value     342,786,000 288,981,000
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance 342,786,000 342,786,000 288,981,000  
Gross Additions 106,751,000      
Gross Reductions (72,625,000)      
Net Change in Unrealized Gains (Losses) 19,679,000      
Ending balance     342,786,000 288,981,000
Interest income 0      
Dividend income 46,280,000      
Other income 0      
Investment, Identifier [Axis]: Blue Owl Capital Corporation Senior Loan Fund LLC, LLC interest        
Schedule of Investments [Line Items]        
Fair Value   295,476,000 [11],[22],[26],[43],[44] 342,786,000 [16],[23],[29],[40],[45]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [16],[23],[29],[40],[45] 342,786,000 342,786,000    
Ending balance   295,476,000 [11],[22],[26],[43],[44] 342,786,000 [16],[23],[29],[40],[45]  
Investment, Identifier [Axis]: Blue Owl Credit SLF LLC(c)        
Schedule of Investments [Line Items]        
Fair Value [46]   295,476,000 0  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [46] 0 0    
Gross Additions [12],[46]   812,719,000    
Gross Reductions [13],[46]   (519,317,000)    
Net Change in Unrealized Gains (Losses) [46]   2,074,000    
Ending balance [46]   295,476,000 0  
Interest income [46]   0    
Dividend income [46]   5,318,000    
Other income [46]   0    
Investment, Identifier [Axis]: BradyIFS Holdings, LLC (fka Individual Foodservice Holdings, LLC), First lien senior secured delayed draw term loan        
Schedule of Investments [Line Items]        
Funded Commitment     3,833,000  
Total unfunded commitments     11,801,000  
Fair Value [19]     0  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [19] 0 0    
Ending balance [19]     0  
Investment, Identifier [Axis]: BradyIFS Holdings, LLC (fka Individual Foodservice Holdings, LLC), First lien senior secured loan        
Schedule of Investments [Line Items]        
Fair Value [14],[15],[17]     144,268,000  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[15],[17] 144,268,000 144,268,000    
Ending balance [14],[15],[17]     144,268,000  
Investment, Identifier [Axis]: BradyIFS Holdings, LLC (fka Individual Foodservice Holdings, LLC), First lien senior secured revolving loan        
Schedule of Investments [Line Items]        
Funded Commitment     0  
Total unfunded commitments     12,026,000  
Fair Value [19]     (126,000)  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [19] (126,000) (126,000)    
Ending balance [19]     (126,000)  
Investment, Identifier [Axis]: BradyPLUS Holdings, LLC (f/k/a BradyIFS Holdings, LLC), First lien senior secured delayed draw term loan        
Schedule of Investments [Line Items]        
Funded Commitment   960,000    
Total unfunded commitments   3,503,000    
Fair Value [27]   0    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Ending balance [27]   0    
Investment, Identifier [Axis]: BradyPLUS Holdings, LLC (f/k/a BradyIFS Holdings, LLC), First lien senior secured loan        
Schedule of Investments [Line Items]        
Fair Value [25],[30]   152,598,000    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Ending balance [25],[30]   152,598,000    
Investment, Identifier [Axis]: Brightway Holdings, LLC, First lien senior secured loan        
Schedule of Investments [Line Items]        
Fair Value   29,084,000 [11],[25],[30] 25,845,000 [14],[37]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[37] 25,845,000 25,845,000    
Ending balance   29,084,000 [11],[25],[30] 25,845,000 [14],[37]  
Investment, Identifier [Axis]: Brightway Holdings, LLC, First lien senior secured revolving loan        
Schedule of Investments [Line Items]        
Fair Value   1,247,000 [11],[25],[31] 1,358,000 [14],[15],[17]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[15],[17] 1,358,000 1,358,000    
Ending balance   1,247,000 [11],[25],[31] 1,358,000 [14],[15],[17]  
Investment, Identifier [Axis]: Brightway Holdings, LLC, First lien senior secured revolving loan 1        
Schedule of Investments [Line Items]        
Funded Commitment   1,263,000 1,421,000  
Total unfunded commitments   1,895,000 1,737,000  
Fair Value   0 [27] 0 [19]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [19] 0 0    
Ending balance   0 [27] 0 [19]  
Investment, Identifier [Axis]: Broadcast Music, Inc. (fka Otis Merger Sub, Inc.), First lien senior secured loan        
Schedule of Investments [Line Items]        
Fair Value [11],[31]   26,495,000    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Ending balance [11],[31]   26,495,000    
Investment, Identifier [Axis]: Broadcast Music, Inc. (fka Otis Merger Sub, Inc.), First lien senior secured revolving loan        
Schedule of Investments [Line Items]        
Funded Commitment   0    
Total unfunded commitments   4,878,000    
Fair Value [27]   (37,000)    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Ending balance [27]   (37,000)    
Investment, Identifier [Axis]: Brooklyn Lender Co-Invest 2, L.P. (dba Boomi), Common Units        
Schedule of Investments [Line Items]        
Fair Value   11,264,000 [1],[11],[26] 8,183,000 [14],[28],[29]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[28],[29] 8,183,000 8,183,000    
Ending balance   11,264,000 [1],[11],[26] 8,183,000 [14],[28],[29]  
Investment, Identifier [Axis]: CD&R Value Building Partners I, L.P. (dba Belron), LP Interest        
Schedule of Investments [Line Items]        
Fair Value   38,072,000 [1],[11],[22],[26],[44] 40,794,000 [14],[16],[28],[29]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[16],[28],[29] 40,794,000 40,794,000    
Ending balance   38,072,000 [1],[11],[22],[26],[44] 40,794,000 [14],[16],[28],[29]  
Investment, Identifier [Axis]: CHA Vision Holdings, Inc. (fka FR Vision Holdings, Inc.), First lien senior secured delayed draw term loan        
Schedule of Investments [Line Items]        
Funded Commitment   3,457,000    
Total unfunded commitments   4,752,000    
Fair Value [27]   0    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Ending balance [27]   0    
Investment, Identifier [Axis]: CHA Vision Holdings, Inc. (fka FR Vision Holdings, Inc.), First lien senior secured loan        
Schedule of Investments [Line Items]        
Fair Value [11],[25],[30]   28,775,000    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Ending balance [11],[25],[30]   28,775,000    
Investment, Identifier [Axis]: CHA Vision Holdings, Inc. (fka FR Vision Holdings, Inc.), First lien senior secured revolving loan        
Schedule of Investments [Line Items]        
Funded Commitment   0    
Total unfunded commitments   2,057,000    
Fair Value [27]   0    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Ending balance [27]   0    
Investment, Identifier [Axis]: CIBT Global, Inc., First lien senior secured loan        
Schedule of Investments [Line Items]        
Fair Value   199,000 [11],[30],[47] 631,000 [14],[15],[48]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[15],[48] 631,000 631,000    
Ending balance   199,000 [11],[30],[47] 631,000 [14],[15],[48]  
Investment, Identifier [Axis]: CIBT Global, Inc., Second lien senior secured loan        
Schedule of Investments [Line Items]        
Fair Value   0 [11],[47],[49] 8,437,000 [14],[15],[48]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[15],[48] 8,437,000 8,437,000    
Ending balance   0 [11],[47],[49] 8,437,000 [14],[15],[48]  
Investment, Identifier [Axis]: CMG HoldCo, LLC (dba Crete United), First lien senior secured delayed draw term loan        
Schedule of Investments [Line Items]        
Fair Value [11],[25],[30]   644,000    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Ending balance [11],[25],[30]   644,000    
Investment, Identifier [Axis]: CMG HoldCo, LLC (dba Crete United), First lien senior secured delayed draw term loan 1        
Schedule of Investments [Line Items]        
Funded Commitment   0    
Total unfunded commitments   123,000    
Fair Value [27]   (1,000)    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Ending balance [27]   (1,000)    
Investment, Identifier [Axis]: CMG HoldCo, LLC (dba Crete United), First lien senior secured delayed draw term loan 2        
Schedule of Investments [Line Items]        
Funded Commitment   175,000    
Total unfunded commitments   133,000    
Fair Value [27]   0    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Ending balance [27]   0    
Investment, Identifier [Axis]: CMG HoldCo, LLC (dba Crete United), First lien senior secured revolving loan        
Schedule of Investments [Line Items]        
Funded Commitment   18,000    
Total unfunded commitments   88,000    
Fair Value [27]   0    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Ending balance [27]   0    
Investment, Identifier [Axis]: CP PIK DEBT ISSUER, LLC (dba CivicPlus, LLC), Unsecured notes        
Schedule of Investments [Line Items]        
Fair Value   25,089,000 [11],[50] 21,195,000 [14],[18]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[18] 21,195,000 21,195,000    
Ending balance   25,089,000 [11],[50] 21,195,000 [14],[18]  
Investment, Identifier [Axis]: CSC MKG Topco LLC (dba Medical Knowledge Group), First lien senior secured loan        
Schedule of Investments [Line Items]        
Fair Value   1,236,000 [11],[31] 1,243,000 [14],[18]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[18] 1,243,000 1,243,000    
Ending balance   1,236,000 [11],[31] 1,243,000 [14],[18]  
Investment, Identifier [Axis]: CT Technologies Intermediate Holdings, Inc. (& Smart Holdings Corp.) (dba Datavant), First lien senior secured delayed draw term loan        
Schedule of Investments [Line Items]        
Funded Commitment   0    
Total unfunded commitments   1,533,000    
Fair Value [27]   (4,000)    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Ending balance [27]   (4,000)    
Investment, Identifier [Axis]: CT Technologies Intermediate Holdings, Inc. (& Smart Holdings Corp.) (dba Datavant), First lien senior secured loan        
Schedule of Investments [Line Items]        
Fair Value [11],[31]   44,524,000    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Ending balance [11],[31]   44,524,000    
Investment, Identifier [Axis]: CT Technologies Intermediate Holdings, Inc. (& Smart Holdings Corp.) (dba Datavant), First lien senior secured revolving loan        
Schedule of Investments [Line Items]        
Funded Commitment   0    
Total unfunded commitments   3,831,000    
Fair Value [27]   (10,000)    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Ending balance [27]   (10,000)    
Investment, Identifier [Axis]: Cadence, Inc., First lien senior secured loan        
Schedule of Investments [Line Items]        
Fair Value [25],[30]   31,918,000    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Ending balance [25],[30]   31,918,000    
Investment, Identifier [Axis]: Cadence, Inc., First lien senior secured revolving loan        
Schedule of Investments [Line Items]        
Funded Commitment   5,270,000    
Total unfunded commitments   2,070,000    
Fair Value [27]   0    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Ending balance [27]   0    
Investment, Identifier [Axis]: Catalis Intermediate, Inc. (fka GovBrands Intermediate, Inc.), First lien senior secured loan        
Schedule of Investments [Line Items]        
Fair Value   12,566,000 [11],[25],[30] 12,592,000 [14],[15],[17]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[15],[17] 12,592,000 12,592,000    
Ending balance   12,566,000 [11],[25],[30] 12,592,000 [14],[15],[17]  
Investment, Identifier [Axis]: Catalis Intermediate, Inc. (fka GovBrands Intermediate, Inc.), First lien senior secured revolving loan        
Schedule of Investments [Line Items]        
Funded Commitment   273,000 273,000  
Total unfunded commitments   520,000 520,000  
Fair Value   0 [27] 0 [19]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [19] 0 0    
Ending balance   0 [27] 0 [19]  
Investment, Identifier [Axis]: Circana Group, L.P. (fka The NPD Group, L.P.), First lien senior secured loan        
Schedule of Investments [Line Items]        
Fair Value [14],[18]     18,949,000  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[18] 18,949,000 18,949,000    
Ending balance [14],[18]     18,949,000  
Investment, Identifier [Axis]: Circana Group, L.P. (fka The NPD Group, L.P.), First lien senior secured revolving loan        
Schedule of Investments [Line Items]        
Fair Value [14],[17],[18]     257,000  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[17],[18] 257,000 257,000    
Ending balance [14],[17],[18]     257,000  
Investment, Identifier [Axis]: Circana Group, L.P. (fka The NPD Group, L.P.), First lien senior secured revolving loan 1        
Schedule of Investments [Line Items]        
Funded Commitment     272,000  
Total unfunded commitments     1,238,000  
Fair Value [19]     0  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [19] 0 0    
Ending balance [19]     0  
Investment, Identifier [Axis]: CivicPlus, LLC, First lien senior secured loan        
Schedule of Investments [Line Items]        
Fair Value   36,035,000 [11],[25],[30] 35,581,000 [14],[15]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[15] 35,581,000 35,581,000    
Ending balance   36,035,000 [11],[25],[30] 35,581,000 [14],[15]  
Investment, Identifier [Axis]: CivicPlus, LLC, First lien senior secured revolving loan        
Schedule of Investments [Line Items]        
Funded Commitment   0    
Total unfunded commitments   2,698,000    
Fair Value   0 [27] 917,000 [14],[17],[18]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[17],[18] 917,000 917,000    
Ending balance   0 [27] 917,000 [14],[17],[18]  
Investment, Identifier [Axis]: CivicPlus, LLC, First lien senior secured revolving loan 1        
Schedule of Investments [Line Items]        
Funded Commitment     917,000  
Total unfunded commitments     1,781,000  
Fair Value [19]     0  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [19] 0 0    
Ending balance [19]     0  
Investment, Identifier [Axis]: Conair Holdings LLC, Second lien senior secured loan        
Schedule of Investments [Line Items]        
Fair Value   119,583,000 [11],[31] 181,406,000 [14],[18]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[18] 181,406,000 181,406,000    
Ending balance   119,583,000 [11],[31] 181,406,000 [14],[18]  
Investment, Identifier [Axis]: Confluent Medical Technologies, Inc., Second lien senior secured loan        
Schedule of Investments [Line Items]        
Fair Value [14],[15]     993,000  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[15] 993,000 993,000    
Ending balance [14],[15]     993,000  
Investment, Identifier [Axis]: CoolSys, Inc., First lien senior secured loan        
Schedule of Investments [Line Items]        
Fair Value [30]   11,596,000    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Ending balance [30]   11,596,000    
Investment, Identifier [Axis]: Cornerstone OnDemand, Inc., Second lien senior secured loan        
Schedule of Investments [Line Items]        
Fair Value   98,748,000 [11],[31] 108,883,000 [14],[18]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[18] 108,883,000 108,883,000    
Ending balance   98,748,000 [11],[31] 108,883,000 [14],[18]  
Investment, Identifier [Axis]: Coupa Holdings, LLC, First lien senior secured delayed draw term loan        
Schedule of Investments [Line Items]        
Funded Commitment   0 0  
Total unfunded commitments   70,000 70,000  
Fair Value   0 [27] (1,000) [19]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [19] (1,000) (1,000)    
Ending balance   0 [27] (1,000) [19]  
Investment, Identifier [Axis]: Coupa Holdings, LLC, First lien senior secured loan        
Schedule of Investments [Line Items]        
Fair Value   781,000 [11],[25],[30] 770,000 [14],[18]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[18] 770,000 770,000    
Ending balance   781,000 [11],[25],[30] 770,000 [14],[18]  
Investment, Identifier [Axis]: Coupa Holdings, LLC, First lien senior secured revolving loan        
Schedule of Investments [Line Items]        
Funded Commitment   0 0  
Total unfunded commitments   54,000 54,000  
Fair Value   0 [27] (1,000) [19]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [19] (1,000) (1,000)    
Ending balance   0 [27] (1,000) [19]  
Investment, Identifier [Axis]: Covetrus, Inc., Second lien senior secured loan        
Schedule of Investments [Line Items]        
Fair Value   4,863,000 [11],[30] 4,988,000 [14],[15]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[15] 4,988,000 4,988,000    
Ending balance   4,863,000 [11],[30] 4,988,000 [14],[15]  
Investment, Identifier [Axis]: Creek Parent, Inc. (dba Catalent), First lien senior secured loan        
Schedule of Investments [Line Items]        
Fair Value [11],[31]   84,518,000    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Ending balance [11],[31]   84,518,000    
Investment, Identifier [Axis]: Creek Parent, Inc. (dba Catalent), First lien senior secured revolving loan        
Schedule of Investments [Line Items]        
Funded Commitment   0    
Total unfunded commitments   12,352,000    
Fair Value [27]   (216,000)    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Ending balance [27]   (216,000)    
Investment, Identifier [Axis]: Cresset Capital Management, LLC, First lien senior secured delayed draw term loan 1        
Schedule of Investments [Line Items]        
Funded Commitment   0    
Total unfunded commitments   3,806,000    
Fair Value [27]   0    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Ending balance [27]   0    
Investment, Identifier [Axis]: Cresset Capital Management, LLC, First lien senior secured delayed draw term loan 2        
Schedule of Investments [Line Items]        
Funded Commitment   0    
Total unfunded commitments   2,239,000    
Fair Value [27]   0    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Ending balance [27]   0    
Investment, Identifier [Axis]: Cresset Capital Management, LLC, First lien senior secured loan        
Schedule of Investments [Line Items]        
Fair Value [11],[31]   7,797,000    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Ending balance [11],[31]   7,797,000    
Investment, Identifier [Axis]: Cresset Capital Management, LLC, First lien senior secured revolving loan        
Schedule of Investments [Line Items]        
Funded Commitment   0    
Total unfunded commitments   1,119,000    
Fair Value [27]   0    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Ending balance [27]   0    
Investment, Identifier [Axis]: Crewline Buyer, Inc. (dba New Relic), First lien senior secured loan        
Schedule of Investments [Line Items]        
Fair Value   108,890,000 [11],[31] 104,608,000 [14],[15]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[15] 104,608,000 104,608,000    
Ending balance   108,890,000 [11],[31] 104,608,000 [14],[15]  
Investment, Identifier [Axis]: Crewline Buyer, Inc. (dba New Relic), First lien senior secured revolving loan        
Schedule of Investments [Line Items]        
Funded Commitment   0 0  
Total unfunded commitments   11,063,000 11,063,000  
Fair Value   (138,000) [27] (166,000) [19]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [19] (166,000) (166,000)    
Ending balance   (138,000) [27] (166,000) [19]  
Investment, Identifier [Axis]: DCG ACQUISITION CORP. (dba DuBois Chemical), First lien senior secured delayed draw term loan        
Schedule of Investments [Line Items]        
Funded Commitment   0    
Total unfunded commitments   9,328,000    
Fair Value [27]   0    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Ending balance [27]   0    
Investment, Identifier [Axis]: DCG ACQUISITION CORP. (dba DuBois Chemical), First lien senior secured loan        
Schedule of Investments [Line Items]        
Fair Value [11],[31]   55,500,000    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Ending balance [11],[31]   55,500,000    
Investment, Identifier [Axis]: DCG ACQUISITION CORP. (dba DuBois Chemical), First lien senior secured revolving loan        
Schedule of Investments [Line Items]        
Funded Commitment   0    
Total unfunded commitments   9,328,000    
Fair Value [27]   (47,000)    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Ending balance [27]   (47,000)    
Investment, Identifier [Axis]: Delinea Buyer, Inc. (f/k/a Centrify), First lien senior secured loan        
Schedule of Investments [Line Items]        
Fair Value   88,434,000 [11],[25],[30] 65,228,000 [14],[15]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[15] 65,228,000 65,228,000    
Ending balance   88,434,000 [11],[25],[30] 65,228,000 [14],[15]  
Investment, Identifier [Axis]: Delinea Buyer, Inc. (f/k/a Centrify), First lien senior secured revolving loan        
Schedule of Investments [Line Items]        
Funded Commitment   0 0  
Total unfunded commitments   6,817,000 6,817,000  
Fair Value   0 [27] (34,000) [19]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [19] (34,000) (34,000)    
Ending balance   0 [27] (34,000) [19]  
Investment, Identifier [Axis]: Delta TopCo, Inc. (dba Infoblox, Inc.), Second lien senior secured loan        
Schedule of Investments [Line Items]        
Fair Value [14],[15]     15,000,000  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[15] 15,000,000 15,000,000    
Ending balance [14],[15]     15,000,000  
Investment, Identifier [Axis]: Denali BuyerCo, LLC (dba Summit Companies), First lien senior secured loan        
Schedule of Investments [Line Items]        
Fair Value   52,197,000 [11],[25],[30] 52,617,000 [14],[15]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[15] 52,617,000 52,617,000    
Ending balance   52,197,000 [11],[25],[30] 52,617,000 [14],[15]  
Investment, Identifier [Axis]: Denali BuyerCo, LLC (dba Summit Companies), First lien senior secured revolving loan        
Schedule of Investments [Line Items]        
Funded Commitment   0 0  
Total unfunded commitments   2,998,000 2,998,000  
Fair Value   0 [27] (7,000) [19]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [19] (7,000) (7,000)    
Ending balance   0 [27] (7,000) [19]  
Investment, Identifier [Axis]: Denali Holding, LP (dba Summit Companies), Class A Units        
Schedule of Investments [Line Items]        
Fair Value   5,959,000 [1],[11],[26] 5,179,000 [14],[28],[29]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[28],[29] 5,179,000 5,179,000    
Ending balance   5,959,000 [1],[11],[26] 5,179,000 [14],[28],[29]  
Investment, Identifier [Axis]: Diagnostic Services Holdings, Inc. (dba Rayus Radiology), First lien senior secured loan        
Schedule of Investments [Line Items]        
Fair Value [14],[18]     992,000  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[18] 992,000 992,000    
Ending balance [14],[18]     992,000  
Investment, Identifier [Axis]: Diamond Mezzanine 24 LLC (dba United Risk), First lien senior secured delayed draw term loan        
Schedule of Investments [Line Items]        
Funded Commitment   0    
Total unfunded commitments   2,850,000    
Fair Value [27]   0    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Ending balance [27]   0    
Investment, Identifier [Axis]: Diamond Mezzanine 24 LLC (dba United Risk), First lien senior secured loan        
Schedule of Investments [Line Items]        
Fair Value [11],[30]   10,634,000    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Ending balance [11],[30]   10,634,000    
Investment, Identifier [Axis]: Diamond Mezzanine 24 LLC (dba United Risk), First lien senior secured revolving loan        
Schedule of Investments [Line Items]        
Fair Value [11],[49]   709,000    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Ending balance [11],[49]   709,000    
Investment, Identifier [Axis]: Diamond Mezzanine 24 LLC (dba United Risk), First lien senior secured revolving loan 1        
Schedule of Investments [Line Items]        
Funded Commitment   713,000    
Total unfunded commitments   0    
Fair Value [27]   0    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Ending balance [27]   0    
Investment, Identifier [Axis]: Diamondback Acquisition, Inc. (dba Sphera), First lien senior secured loan        
Schedule of Investments [Line Items]        
Fair Value   4,005,000 [11],[31] 4,006,000 [14],[18]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[18] 4,006,000 4,006,000    
Ending balance   4,005,000 [11],[31] 4,006,000 [14],[18]  
Investment, Identifier [Axis]: Dodge Construction Network Holdings, L.P., Class A-2 Common Units        
Schedule of Investments [Line Items]        
Fair Value   310,000 [1],[11],[26] 1,494,000 [14],[28],[29]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[28],[29] 1,494,000 1,494,000    
Ending balance   310,000 [1],[11],[26] 1,494,000 [14],[28],[29]  
Investment, Identifier [Axis]: Dodge Construction Network Holdings, L.P., Series A Preferred Units        
Schedule of Investments [Line Items]        
Fair Value   26,000 [11],[26],[30] 32,000 [14],[15],[29]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[15],[29] 32,000 32,000    
Ending balance   26,000 [11],[26],[30] 32,000 [14],[15],[29]  
Investment, Identifier [Axis]: Dresser Utility Solutions, LLC, First lien senior secured delayed draw term loan        
Schedule of Investments [Line Items]        
Funded Commitment   0    
Total unfunded commitments   5,131,000    
Fair Value [27]   0    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Ending balance [27]   0    
Investment, Identifier [Axis]: Dresser Utility Solutions, LLC, First lien senior secured loan        
Schedule of Investments [Line Items]        
Fair Value [11],[31]   55,873,000    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Ending balance [11],[31]   55,873,000    
Investment, Identifier [Axis]: Dresser Utility Solutions, LLC, First lien senior secured revolving loan        
Schedule of Investments [Line Items]        
Funded Commitment   0    
Total unfunded commitments   7,183,000    
Fair Value [27]   (18,000)    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Ending balance [27]   (18,000)    
Investment, Identifier [Axis]: DuraServ LLC, First lien senior secured delayed draw term loan        
Schedule of Investments [Line Items]        
Funded Commitment   13,506,000    
Total unfunded commitments   13,722,000    
Fair Value [27]   0    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Ending balance [27]   0    
Investment, Identifier [Axis]: DuraServ LLC, First lien senior secured loan        
Schedule of Investments [Line Items]        
Fair Value [11],[25],[31]   86,495,000    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Ending balance [11],[25],[31]   86,495,000    
Investment, Identifier [Axis]: DuraServ LLC, First lien senior secured revolving loan        
Schedule of Investments [Line Items]        
Funded Commitment   0    
Total unfunded commitments   13,631,000    
Fair Value [27]   (68,000)    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Ending balance [27]   (68,000)    
Investment, Identifier [Axis]: EAGLE FAMILY FOODS GROUP LLC, First lien senior secured loan        
Schedule of Investments [Line Items]        
Fair Value [11],[31]   1,625,000    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Ending balance [11],[31]   1,625,000    
Investment, Identifier [Axis]: EET Buyer, Inc. (dba e-Emphasys), First lien senior secured loan        
Schedule of Investments [Line Items]        
Fair Value   4,420,000 [11],[30] 4,466,000 [14],[15]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[15] 4,466,000 4,466,000    
Ending balance   4,420,000 [11],[30] 4,466,000 [14],[15]  
Investment, Identifier [Axis]: EET Buyer, Inc. (dba e-Emphasys), First lien senior secured revolving loan        
Schedule of Investments [Line Items]        
Funded Commitment   0    
Total unfunded commitments   455,000    
Fair Value   0 [27] 91,000 [14],[17],[37]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[17],[37] 91,000 91,000    
Ending balance   0 [27] 91,000 [14],[17],[37]  
Investment, Identifier [Axis]: EET Buyer, Inc. (dba e-Emphasys), First lien senior secured revolving loan 1        
Schedule of Investments [Line Items]        
Funded Commitment     91,000  
Total unfunded commitments     364,000  
Fair Value [19]     0  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [19] 0 0    
Ending balance [19]     0  
Investment, Identifier [Axis]: EOS Finco S.A.R.L, First lien senior secured delayed draw term loan        
Schedule of Investments [Line Items]        
Fair Value [11],[22],[25],[30]   (713,000)    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Ending balance [11],[22],[25],[30]   (713,000)    
Investment, Identifier [Axis]: EOS Finco S.A.R.L, First lien senior secured delayed draw term loan 1        
Schedule of Investments [Line Items]        
Funded Commitment   69,000    
Total unfunded commitments   2,489,000    
Fair Value [27]   0    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Ending balance [27]   0    
Investment, Identifier [Axis]: EOS Finco S.A.R.L, First lien senior secured loan        
Schedule of Investments [Line Items]        
Fair Value [11],[22],[50]   14,405,000    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Ending balance [11],[22],[50]   14,405,000    
Investment, Identifier [Axis]: Eagle Family Foods Group LLC, First lien senior secured revolving loan        
Schedule of Investments [Line Items]        
Funded Commitment   0    
Total unfunded commitments   189,000    
Fair Value [27]   (1,000)    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Ending balance [27]   (1,000)    
Investment, Identifier [Axis]: Eagle Infrastructure Services, LLC, Common Units        
Schedule of Investments [Line Items]        
Fair Value [1],[26]   25,099,000    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Ending balance [1],[26]   25,099,000    
Investment, Identifier [Axis]: Eagle Infrastructure Services, LLC, First lien senior secured loan        
Schedule of Investments [Line Items]        
Fair Value   86,702,000 [30] 86,004,000 [15],[23]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [15],[23] 86,004,000 86,004,000    
Ending balance   86,702,000 [30] 86,004,000 [15],[23]  
Investment, Identifier [Axis]: Eagle Infrastructure Super Holdco LLC, Common Units        
Schedule of Investments [Line Items]        
Fair Value [14],[23],[28],[29]     25,099,000  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[23],[28],[29] 25,099,000 25,099,000    
Ending balance [14],[23],[28],[29]     25,099,000  
Investment, Identifier [Axis]: Eagle Infrastructure Super LLC        
Schedule of Investments [Line Items]        
Fair Value   111,801,000 111,103,000  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance 111,103,000 111,103,000    
Gross Additions [12]   271,000    
Gross Reductions [13]   (398,000)    
Net Change in Unrealized Gains (Losses)   825,000    
Ending balance   111,801,000 111,103,000  
Interest income   11,674,000    
Dividend income   3,465,000    
Other income   50,000    
Investment, Identifier [Axis]: Eagle Infrastructure Super Llc        
Schedule of Investments [Line Items]        
Fair Value     111,103,000 0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance 111,103,000 111,103,000 0  
Gross Additions 110,045,000      
Gross Reductions (2,000)      
Net Change in Unrealized Gains (Losses) 1,060,000      
Ending balance     111,103,000 0
Interest income 8,913,000      
Dividend income 0      
Other income 27,000      
Investment, Identifier [Axis]: Elliott Alto Co-Investor Aggregator L.P., LP Interest        
Schedule of Investments [Line Items]        
Fair Value   4,882,000 [1],[11],[22],[26] 3,146,000 [14],[16],[28],[29]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[16],[28],[29] 3,146,000 3,146,000    
Ending balance   4,882,000 [1],[11],[22],[26] 3,146,000 [14],[16],[28],[29]  
Investment, Identifier [Axis]: Endries Acquisition, Inc., First lien senior secured delayed draw term loan        
Schedule of Investments [Line Items]        
Funded Commitment   0    
Total unfunded commitments   7,835,000    
Fair Value [27]   (59,000)    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Ending balance [27]   (59,000)    
Investment, Identifier [Axis]: Endries Acquisition, Inc., First lien senior secured delayed draw term loan 1        
Schedule of Investments [Line Items]        
Funded Commitment     0  
Total unfunded commitments     20,370,000  
Fair Value [19]     (153,000)  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [19] (153,000) (153,000)    
Ending balance [19]     (153,000)  
Investment, Identifier [Axis]: Endries Acquisition, Inc., First lien senior secured delayed draw term loan 2        
Schedule of Investments [Line Items]        
Funded Commitment     0  
Total unfunded commitments     7,835,000  
Fair Value [19]     (59,000)  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [19] (59,000) (59,000)    
Ending balance [19]     (59,000)  
Investment, Identifier [Axis]: Endries Acquisition, Inc., First lien senior secured loan        
Schedule of Investments [Line Items]        
Fair Value   97,359,000 [11],[25],[31] 81,275,000 [14],[15]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[15] 81,275,000 81,275,000    
Ending balance   97,359,000 [11],[25],[31] 81,275,000 [14],[15]  
Investment, Identifier [Axis]: Engage Debtco Limited, First lien senior secured loan        
Schedule of Investments [Line Items]        
Fair Value   1,007,000 [11],[22],[25],[30] 988,000 [14],[15],[16]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[15],[16] 988,000 988,000    
Ending balance   1,007,000 [11],[22],[25],[30] 988,000 [14],[15],[16]  
Investment, Identifier [Axis]: Entertainment Benefits Group, LLC, First lien senior secured loan        
Schedule of Investments [Line Items]        
Fair Value [14],[17],[18]     907,000  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[17],[18] 907,000 907,000    
Ending balance [14],[17],[18]     907,000  
Investment, Identifier [Axis]: Entertainment Benefits Group, LLC, First lien senior secured revolving loan        
Schedule of Investments [Line Items]        
Funded Commitment     53,000  
Total unfunded commitments     80,000  
Fair Value [19]     0  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [19] 0 0    
Ending balance [19]     0  
Investment, Identifier [Axis]: Essential Services Holding Corporation (dba Turnpoint), First lien senior secured delayed draw term loan        
Schedule of Investments [Line Items]        
Funded Commitment   0    
Total unfunded commitments   3,866,000    
Fair Value [27]   (19,000)    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Ending balance [27]   (19,000)    
Investment, Identifier [Axis]: Essential Services Holding Corporation (dba Turnpoint), First lien senior secured loan        
Schedule of Investments [Line Items]        
Fair Value [11],[31]   19,520,000    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Ending balance [11],[31]   19,520,000    
Investment, Identifier [Axis]: Essential Services Holding Corporation (dba Turnpoint), First lien senior secured revolving loan        
Schedule of Investments [Line Items]        
Funded Commitment   0    
Total unfunded commitments   2,416,000    
Fair Value [27]   (24,000)    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Ending balance [27]   (24,000)    
Investment, Identifier [Axis]: Evology, LLC, Class B Units        
Schedule of Investments [Line Items]        
Fair Value [14],[28],[29]     2,065,000  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[28],[29] 2,065,000 2,065,000    
Ending balance [14],[28],[29]     2,065,000  
Investment, Identifier [Axis]: Evolution BuyerCo, Inc. (dba SIAA), First lien senior secured delayed draw term loan        
Schedule of Investments [Line Items]        
Funded Commitment     0  
Total unfunded commitments     23,910,000  
Fair Value   3,945,000 [11],[25],[30] 0 [19]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [19] 0 0    
Ending balance   3,945,000 [11],[25],[30] 0 [19]  
Investment, Identifier [Axis]: Evolution BuyerCo, Inc. (dba SIAA), First lien senior secured delayed draw term loan 1        
Schedule of Investments [Line Items]        
Funded Commitment   3,945,000    
Total unfunded commitments   19,925,000    
Fair Value [27]   0    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Ending balance [27]   0    
Investment, Identifier [Axis]: Evolution BuyerCo, Inc. (dba SIAA), First lien senior secured loan        
Schedule of Investments [Line Items]        
Fair Value   138,845,000 [11],[25],[30] 139,228,000 [14],[15]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[15] 139,228,000 139,228,000    
Ending balance   138,845,000 [11],[25],[30] 139,228,000 [14],[15]  
Investment, Identifier [Axis]: Evolution BuyerCo, Inc. (dba SIAA), First lien senior secured revolving loan        
Schedule of Investments [Line Items]        
Funded Commitment   0 0  
Total unfunded commitments   10,709,000 10,709,000  
Fair Value   0 [27] (80,000) [19]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [19] (80,000) (80,000)    
Ending balance   0 [27] (80,000) [19]  
Investment, Identifier [Axis]: Evolution Parent, LP (dba SIAA), LP Interest        
Schedule of Investments [Line Items]        
Fair Value   4,874,000 [26] 5,042,000 [14],[28],[29]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[28],[29] 5,042,000 5,042,000    
Ending balance   4,874,000 [26] 5,042,000 [14],[28],[29]  
Investment, Identifier [Axis]: Ex Vivo Parent Inc. (dba OB Hospitalist), First lien senior secured loan        
Schedule of Investments [Line Items]        
Fair Value   78,667,000 [11],[30] 67,251,000 [14],[18]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[18] 67,251,000 67,251,000    
Ending balance   78,667,000 [11],[30] 67,251,000 [14],[18]  
Investment, Identifier [Axis]: FARADAY BUYER, LLC (dba MacLean Power Systems), First lien senior secured delayed draw term loan        
Schedule of Investments [Line Items]        
Funded Commitment     0  
Total unfunded commitments     11,130,000  
Fair Value [19]     (111,000)  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [19] (111,000) (111,000)    
Ending balance [19]     (111,000)  
Investment, Identifier [Axis]: FARADAY BUYER, LLC (dba MacLean Power Systems), First lien senior secured loan        
Schedule of Investments [Line Items]        
Fair Value [14],[15]     103,904,000  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[15] 103,904,000 103,904,000    
Ending balance [14],[15]     103,904,000  
Investment, Identifier [Axis]: FR Flow Control CB LLC (dba Trillium Flow Technologies), First lien senior secured delayed draw term loan        
Schedule of Investments [Line Items]        
Funded Commitment   0    
Total unfunded commitments   4,803,000    
Fair Value [27]   0    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Ending balance [27]   0    
Investment, Identifier [Axis]: FR Flow Control CB LLC (dba Trillium Flow Technologies), First lien senior secured loan        
Schedule of Investments [Line Items]        
Fair Value [11],[22],[30]   23,837,000    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Ending balance [11],[22],[30]   23,837,000    
Investment, Identifier [Axis]: FR Flow Control CB LLC (dba Trillium Flow Technologies), First lien senior secured revolving loan        
Schedule of Investments [Line Items]        
Funded Commitment   0    
Total unfunded commitments   3,930,000    
Fair Value [27]   (29,000)    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Ending balance [27]   (29,000)    
Investment, Identifier [Axis]: Fairchester Custom Windows        
Schedule of Investments [Line Items]        
Fair Value   7,600,000 7,600,000  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance 7,600,000 7,600,000    
Ending balance   7,600,000 7,600,000  
Investment, Identifier [Axis]: Faraday Buyer, LLC (dba MacLean Power Systems), First lien senior secured delayed draw term loan        
Schedule of Investments [Line Items]        
Funded Commitment   0    
Total unfunded commitments   11,130,000    
Fair Value [27]   0    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Ending balance [27]   0    
Investment, Identifier [Axis]: Faraday Buyer, LLC (dba MacLean Power Systems), First lien senior secured loan        
Schedule of Investments [Line Items]        
Fair Value [11],[30]   103,912,000    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Ending balance [11],[30]   103,912,000    
Investment, Identifier [Axis]: Feradyne Outdoors, LLC, First lien senior secured loan        
Schedule of Investments [Line Items]        
Fair Value   65,207,000 [11],[30] 67,548,000 [14],[15]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[15] 67,548,000 67,548,000    
Ending balance   65,207,000 [11],[30] 67,548,000 [14],[15]  
Investment, Identifier [Axis]: Fiesta Purchaser, Inc. (dba Shearer's Foods), First lien senior secured revolving loan        
Schedule of Investments [Line Items]        
Funded Commitment   0    
Total unfunded commitments   2,658,000    
Fair Value [27]   (1,000)    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Ending balance [27]   (1,000)    
Investment, Identifier [Axis]: Fifth Season Investments LLC (fka Chapford SMA Partnership, L.P.)        
Schedule of Investments [Line Items]        
Fair Value   223,274,000 156,794,000 89,680,000
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance 156,794,000 156,794,000 89,680,000  
Gross Additions 67,120,000 115,651,000 [12]    
Gross Reductions 0 (70,093,000) [13]    
Net Change in Unrealized Gains (Losses) (6,000) 20,922,000    
Ending balance   223,274,000 156,794,000 89,680,000
Interest income 0 0    
Dividend income 4,963,000 23,831,000    
Other income 0 0    
Investment, Identifier [Axis]: Fifth Season Investments LLC, Class A Units        
Schedule of Investments [Line Items]        
Fair Value   223,274,000 [11],[26] 156,794,000 [14],[23],[29]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[23],[29] 156,794,000 156,794,000    
Ending balance   223,274,000 [11],[26] 156,794,000 [14],[23],[29]  
Investment, Identifier [Axis]: Finastra USA, Inc., First lien senior secured loan        
Schedule of Investments [Line Items]        
Fair Value   94,335,000 [11],[25],[30],[51] 88,354,000 [14],[16],[37]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[16],[37] 88,354,000 88,354,000    
Ending balance   94,335,000 [11],[25],[30],[51] 88,354,000 [14],[16],[37]  
Investment, Identifier [Axis]: Finastra USA, Inc., First lien senior secured revolving loan        
Schedule of Investments [Line Items]        
Funded Commitment   5,758,000    
Total unfunded commitments   3,500,000    
Fair Value   0 [27] 2,358,000 [14],[16],[17],[18]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[16],[17],[18] 2,358,000 2,358,000    
Ending balance   0 [27] 2,358,000 [14],[16],[17],[18]  
Investment, Identifier [Axis]: Finastra USA, Inc., First lien senior secured revolving loan 1        
Schedule of Investments [Line Items]        
Funded Commitment     2,450,000  
Total unfunded commitments     6,808,000  
Fair Value [19]     0  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [19] 0 0    
Ending balance [19]     0  
Investment, Identifier [Axis]: Forescout Technologies, Inc., First lien senior secured delayed draw term loan 1        
Schedule of Investments [Line Items]        
Funded Commitment     0  
Total unfunded commitments     48,750,000  
Fair Value [19]     0  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [19] 0 0    
Ending balance [19]     0  
Investment, Identifier [Axis]: Forescout Technologies, Inc., First lien senior secured loan        
Schedule of Investments [Line Items]        
Fair Value   78,805,000 [11],[30] 72,213,000 [14],[15]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[15] 72,213,000 72,213,000    
Ending balance   78,805,000 [11],[30] 72,213,000 [14],[15]  
Investment, Identifier [Axis]: Forescout Technologies, Inc., First lien senior secured revolving loan        
Schedule of Investments [Line Items]        
Funded Commitment   0 0  
Total unfunded commitments   11,320,000 5,345,000  
Fair Value   (57,000) [27] 0 [19]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [19] 0 0    
Ending balance   (57,000) [27] 0 [19]  
Investment, Identifier [Axis]: Fortis Solutions Group, LLC, First lien senior secured loan        
Schedule of Investments [Line Items]        
Fair Value   4,468,000 [11],[25],[30] 4,479,000 [14],[15]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[15] 4,479,000 4,479,000    
Ending balance   4,468,000 [11],[25],[30] 4,479,000 [14],[15]  
Investment, Identifier [Axis]: Fortis Solutions Group, LLC, First lien senior secured revolving loan        
Schedule of Investments [Line Items]        
Fair Value   155,000 [11],[25],[30] 13,000 [14],[15],[17]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[15],[17] 13,000 13,000    
Ending balance   155,000 [11],[25],[30] 13,000 [14],[15],[17]  
Investment, Identifier [Axis]: Fortis Solutions Group, LLC, First lien senior secured revolving loan 1        
Schedule of Investments [Line Items]        
Funded Commitment   162,000 23,000  
Total unfunded commitments   300,000 439,000  
Fair Value   0 [27] 0 [19]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [19] 0 0    
Ending balance   0 [27] 0 [19]  
Investment, Identifier [Axis]: Foundation Consumer Brands, LLC, First lien senior secured loan        
Schedule of Investments [Line Items]        
Fair Value   2,997,000 [11],[31] 3,197,000 [14],[15]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[15] 3,197,000 3,197,000    
Ending balance   2,997,000 [11],[31] 3,197,000 [14],[15]  
Investment, Identifier [Axis]: Fullsteam Operations, LLC, First lien senior secured delayed draw term loan        
Schedule of Investments [Line Items]        
Fair Value [11],[25],[30]   811,000    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Ending balance [11],[25],[30]   811,000    
Investment, Identifier [Axis]: Fullsteam Operations, LLC, First lien senior secured delayed draw term loan 1        
Schedule of Investments [Line Items]        
Funded Commitment   464,000 851,000  
Total unfunded commitments   4,536,000 1,961,000  
Fair Value   0 [27] 0 [19]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [19] 0 0    
Ending balance   0 [27] 0 [19]  
Investment, Identifier [Axis]: Fullsteam Operations, LLC, First lien senior secured delayed draw term loan 2        
Schedule of Investments [Line Items]        
Funded Commitment   354,000 0  
Total unfunded commitments   896,000 1,250,000  
Fair Value   0 [27] (19,000) [19]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [19] (19,000) (19,000)    
Ending balance   0 [27] (19,000) [19]  
Investment, Identifier [Axis]: Fullsteam Operations, LLC, First lien senior secured loan        
Schedule of Investments [Line Items]        
Fair Value   13,001,000 [11],[25],[30] 9,465,000 [14],[15],[17]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[15],[17] 9,465,000 9,465,000    
Ending balance   13,001,000 [11],[25],[30] 9,465,000 [14],[15],[17]  
Investment, Identifier [Axis]: Fullsteam Operations, LLC, First lien senior secured revolving loan        
Schedule of Investments [Line Items]        
Funded Commitment   0 0  
Total unfunded commitments   500,000 500,000  
Fair Value   0 [27] (15,000) [19]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [19] (15,000) (15,000)    
Ending balance   0 [27] (15,000) [19]  
Investment, Identifier [Axis]: GI Apple Midco LLC (dba Atlas Technical Consultants), First lien senior secured delayed draw term loan        
Schedule of Investments [Line Items]        
Funded Commitment   17,000 17,000  
Total unfunded commitments   141,000 141,000  
Fair Value   0 [27] 0 [19]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [19] 0 0    
Ending balance   0 [27] 0 [19]  
Investment, Identifier [Axis]: GI Apple Midco LLC (dba Atlas Technical Consultants), First lien senior secured loan        
Schedule of Investments [Line Items]        
Fair Value   822,000 [11],[25],[31] 733,000 [14],[17],[18]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[17],[18] 733,000 733,000    
Ending balance   822,000 [11],[25],[31] 733,000 [14],[17],[18]  
Investment, Identifier [Axis]: GI Apple Midco LLC (dba Atlas Technical Consultants), First lien senior secured revolving loan        
Schedule of Investments [Line Items]        
Fair Value   42,000 [11],[25],[31] 60,000 [14],[17],[18]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[17],[18] 60,000 60,000    
Ending balance   42,000 [11],[25],[31] 60,000 [14],[17],[18]  
Investment, Identifier [Axis]: GI Apple Midco LLC (dba Atlas Technical Consultants), First lien senior secured revolving loan 1        
Schedule of Investments [Line Items]        
Funded Commitment   43,000 62,000  
Total unfunded commitments   68,000 49,000  
Fair Value   0 [27] 0 [19]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [19] 0 0    
Ending balance   0 [27] 0 [19]  
Investment, Identifier [Axis]: GI Ranger Intermediate, LLC (dba Rectangle Health), First lien senior secured loan        
Schedule of Investments [Line Items]        
Fair Value   4,413,000 [11],[25],[30] 4,471,000 [14],[15]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[15] 4,471,000 4,471,000    
Ending balance   4,413,000 [11],[25],[30] 4,471,000 [14],[15]  
Investment, Identifier [Axis]: GI Ranger Intermediate, LLC (dba Rectangle Health), First lien senior secured revolving loan        
Schedule of Investments [Line Items]        
Fair Value   37,000 [11],[25],[30] 216,000 [14],[15],[17]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[15],[17] 216,000 216,000    
Ending balance   37,000 [11],[25],[30] 216,000 [14],[15],[17]  
Investment, Identifier [Axis]: GI Ranger Intermediate, LLC (dba Rectangle Health), First lien senior secured revolving loan 1        
Schedule of Investments [Line Items]        
Funded Commitment   43,000 221,000  
Total unfunded commitments   326,000 147,000  
Fair Value   0 [27] 0 [19]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [19] 0 0    
Ending balance   0 [27] 0 [19]  
Investment, Identifier [Axis]: Gainsight, Inc., First lien senior secured loan        
Schedule of Investments [Line Items]        
Fair Value   28,007,000 [11],[25],[30] 25,279,000 [14],[15],[17]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[15],[17] 25,279,000 25,279,000    
Ending balance   28,007,000 [11],[25],[30] 25,279,000 [14],[15],[17]  
Investment, Identifier [Axis]: Gainsight, Inc., First lien senior secured revolving loan        
Schedule of Investments [Line Items]        
Funded Commitment   1,875,000 1,711,000  
Total unfunded commitments   1,727,000 1,727,000  
Fair Value   0 [27] 0 [19]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [19] 0 0    
Ending balance   0 [27] 0 [19]  
Investment, Identifier [Axis]: Galls, LLC, First lien senior secured delayed draw term loan        
Schedule of Investments [Line Items]        
Funded Commitment   3,604,000    
Total unfunded commitments   29,174,000    
Fair Value [27]   0    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Ending balance [27]   0    
Investment, Identifier [Axis]: Galls, LLC, First lien senior secured loan        
Schedule of Investments [Line Items]        
Fair Value   102,132,000 [11],[25],[30] 111,930,000 [14],[15]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[15] 111,930,000 111,930,000    
Ending balance   102,132,000 [11],[25],[30] 111,930,000 [14],[15]  
Investment, Identifier [Axis]: Galls, LLC, First lien senior secured revolving loan        
Schedule of Investments [Line Items]        
Funded Commitment   0    
Total unfunded commitments   13,118,000    
Fair Value   0 [27] 11,401,000 [14],[15],[17]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[15],[17] 11,401,000 11,401,000    
Ending balance   0 [27] 11,401,000 [14],[15],[17]  
Investment, Identifier [Axis]: Galls, LLC, First lien senior secured revolving loan 1        
Schedule of Investments [Line Items]        
Funded Commitment     11,401,000  
Total unfunded commitments     20,967,000  
Fair Value [19]     0  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [19] 0 0    
Ending balance [19]     0  
Investment, Identifier [Axis]: Galway Borrower LLC 1, First lien senior secured delayed draw term loan        
Schedule of Investments [Line Items]        
Funded Commitment   28,000    
Total unfunded commitments   1,526,000    
Fair Value [27]   0    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Ending balance [27]   0    
Investment, Identifier [Axis]: Galway Borrower LLC, First lien senior secured delayed draw term loan        
Schedule of Investments [Line Items]        
Fair Value [11],[25],[30]   44,000    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Ending balance [11],[25],[30]   44,000    
Investment, Identifier [Axis]: Galway Borrower LLC, First lien senior secured revolving loan 1        
Schedule of Investments [Line Items]        
Funded Commitment   16,000    
Total unfunded commitments   179,000    
Fair Value [27]   0    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Ending balance [27]   0    
Investment, Identifier [Axis]: Garden State Custom Windows, LLC        
Schedule of Investments [Line Items]        
Fair Value   33,400,000 33,400,000  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance 33,400,000 33,400,000    
Ending balance   33,400,000 33,400,000  
Investment, Identifier [Axis]: Gaylord Chemical Company, L.L.C., First lien senior secured loan        
Schedule of Investments [Line Items]        
Fair Value   130,798,000 [11],[25],[30] 135,686,000 [14],[15]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[15] 135,686,000 135,686,000    
Ending balance   130,798,000 [11],[25],[30] 135,686,000 [14],[15]  
Investment, Identifier [Axis]: Gaylord Chemical Company, L.L.C., First lien senior secured revolving loan        
Schedule of Investments [Line Items]        
Funded Commitment   6,865,000 0  
Total unfunded commitments   6,337,000 13,202,000  
Fair Value   0 [27] (66,000) [19]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [19] (66,000) (66,000)    
Ending balance   0 [27] (66,000) [19]  
Investment, Identifier [Axis]: Gehl Foods, LLC, First lien senior secured delayed draw term loan        
Schedule of Investments [Line Items]        
Fair Value [11],[25],[30]   2,125,000    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Ending balance [11],[25],[30]   2,125,000    
Investment, Identifier [Axis]: Gehl Foods, LLC, First lien senior secured delayed draw term loan 1        
Schedule of Investments [Line Items]        
Funded Commitment   2,135,000    
Total unfunded commitments   3,203,000    
Fair Value [27]   0    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Ending balance [27]   0    
Investment, Identifier [Axis]: Gehl Foods, LLC, First lien senior secured loan        
Schedule of Investments [Line Items]        
Fair Value [11],[31]   69,056,000    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Ending balance [11],[31]   69,056,000    
Investment, Identifier [Axis]: Genesis Acquisition Co. (dba Procare Software), First lien senior secured loan        
Schedule of Investments [Line Items]        
Fair Value [14],[15]     20,392,000  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[15] 20,392,000 20,392,000    
Ending balance [14],[15]     20,392,000  
Investment, Identifier [Axis]: Genesis Acquisition Co. (dba Procare Software), First lien senior secured revolving loan        
Schedule of Investments [Line Items]        
Funded Commitment     2,637,000  
Total unfunded commitments     0  
Fair Value [19]     0  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [19] 0 0    
Ending balance [19]     0  
Investment, Identifier [Axis]: Gerson Lehrman Group, Inc., First lien senior secured loan        
Schedule of Investments [Line Items]        
Fair Value   122,511,000 [11],[30] 120,356,000 [14],[15]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[15] 120,356,000 120,356,000    
Ending balance   122,511,000 [11],[30] 120,356,000 [14],[15]  
Investment, Identifier [Axis]: Gerson Lehrman Group, Inc., First lien senior secured revolving loan        
Schedule of Investments [Line Items]        
Funded Commitment   0 0  
Total unfunded commitments   6,217,000 21,563,000  
Fair Value   (16,000) [27] 0 [19]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [19] 0 0    
Ending balance   (16,000) [27] 0 [19]  
Investment, Identifier [Axis]: Global Music Rights, LLC, First lien senior secured loan        
Schedule of Investments [Line Items]        
Fair Value [14],[15]     7,350,000  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[15] 7,350,000 7,350,000    
Ending balance [14],[15]     7,350,000  
Investment, Identifier [Axis]: Global Music Rights, LLC, First lien senior secured revolving loan        
Schedule of Investments [Line Items]        
Funded Commitment     0  
Total unfunded commitments     667,000  
Fair Value [19]     0  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [19] 0 0    
Ending balance [19]     0  
Investment, Identifier [Axis]: Gloves Buyer, Inc. (dba Protective Industrial Products), First lien senior secured loan        
Schedule of Investments [Line Items]        
Fair Value [11],[31]   14,923,000    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Ending balance [11],[31]   14,923,000    
Investment, Identifier [Axis]: Gloves Buyer, Inc. (dba Protective Industrial Products), Second lien senior secured loan        
Schedule of Investments [Line Items]        
Fair Value [14],[18]     28,958,000  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[18] 28,958,000 28,958,000    
Ending balance [14],[18]     28,958,000  
Investment, Identifier [Axis]: Gloves Holdings, LP (dba Protective Industrial Products), LP Interest        
Schedule of Investments [Line Items]        
Fair Value   3,847,000 [1],[11],[26] 3,847,000 [14],[28],[29]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[28],[29] 3,847,000 3,847,000    
Ending balance   3,847,000 [1],[11],[26] 3,847,000 [14],[28],[29]  
Investment, Identifier [Axis]: GoHealth, Inc., Common stock        
Schedule of Investments [Line Items]        
Fair Value   912,000 [1],[11],[52] 909,000 [14],[28],[42]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[28],[42] 909,000 909,000    
Ending balance   912,000 [1],[11],[52] 909,000 [14],[28],[42]  
Investment, Identifier [Axis]: Granicus, Inc., First lien senior secured delayed draw term loan        
Schedule of Investments [Line Items]        
Fair Value [11],[30]   1,150,000    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Ending balance [11],[30]   1,150,000    
Investment, Identifier [Axis]: Granicus, Inc., First lien senior secured loan        
Schedule of Investments [Line Items]        
Fair Value   7,841,000 [11],[30] 15,913,000 [14],[15]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[15] 15,913,000 15,913,000    
Ending balance   7,841,000 [11],[30] 15,913,000 [14],[15]  
Investment, Identifier [Axis]: Granicus, Inc., First lien senior secured revolving loan        
Schedule of Investments [Line Items]        
Funded Commitment   0    
Total unfunded commitments   1,096,000    
Fair Value   0 [27] 245,000 [14],[15],[17]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[15],[17] 245,000 245,000    
Ending balance   0 [27] 245,000 [14],[15],[17]  
Investment, Identifier [Axis]: Granicus, Inc., First lien senior secured revolving loan 1        
Schedule of Investments [Line Items]        
Funded Commitment     248,000  
Total unfunded commitments     939,000  
Fair Value [19]     0  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [19] 0 0    
Ending balance [19]     0  
Investment, Identifier [Axis]: Greater Toronto Custom Windows, Corp.        
Schedule of Investments [Line Items]        
Fair Value   10,000,000 10,000,000  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance 10,000,000 10,000,000    
Ending balance   10,000,000 10,000,000  
Investment, Identifier [Axis]: GrowthCurve Capital Sunrise Co-Invest LP (dba Brightway), LP Interest        
Schedule of Investments [Line Items]        
Fair Value   630,000 [1],[11],[26] 612,000 [14],[28],[29]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[28],[29] 612,000 612,000    
Ending balance   630,000 [1],[11],[26] 612,000 [14],[28],[29]  
Investment, Identifier [Axis]: Guidehouse Inc., First lien senior secured loan        
Schedule of Investments [Line Items]        
Fair Value   4,608,000 [11],[31] 4,549,000 [14],[18]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[18] 4,549,000 4,549,000    
Ending balance   4,608,000 [11],[31] 4,549,000 [14],[18]  
Investment, Identifier [Axis]: H&F Opportunities LUX III S.À R.L (dba Checkmarx), First lien senior secured loan        
Schedule of Investments [Line Items]        
Fair Value   51,438,000 [11],[22],[31] 51,567,000 [14],[16],[18]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[16],[18] 51,567,000 51,567,000    
Ending balance   51,438,000 [11],[22],[31] 51,567,000 [14],[16],[18]  
Investment, Identifier [Axis]: H&F Opportunities LUX III S.À R.L (dba Checkmarx), First lien senior secured revolving loan        
Schedule of Investments [Line Items]        
Funded Commitment   0 0  
Total unfunded commitments   16,250,000 16,250,000  
Fair Value   (41,000) [27] 0 [19]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [19] 0 0    
Ending balance   (41,000) [27] 0 [19]  
Investment, Identifier [Axis]: H-Food Holdings, LLC, LLC interest        
Schedule of Investments [Line Items]        
Fair Value [14],[28],[29]     2,599,000  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[28],[29] 2,599,000 2,599,000    
Ending balance [14],[28],[29]     2,599,000  
Investment, Identifier [Axis]: H-Food Holdings, LLC, Second lien senior secured loan        
Schedule of Investments [Line Items]        
Fair Value   4,872,000 [11],[47],[49] 79,779,000 [14],[15]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[15] 79,779,000 79,779,000    
Ending balance   4,872,000 [11],[47],[49] 79,779,000 [14],[15]  
Investment, Identifier [Axis]: HFS Matterhorn Topco, Inc., LLC interest        
Schedule of Investments [Line Items]        
Fair Value [1],[11],[26]   0    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Ending balance [1],[11],[26]   0    
Investment, Identifier [Axis]: HGH Purchaser, Inc. (dba Horizon Services), First lien senior secured loan        
Schedule of Investments [Line Items]        
Fair Value   179,417,000 [11],[25],[30] 202,032,000 [14],[15],[17]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[15],[17] 202,032,000 202,032,000    
Ending balance   179,417,000 [11],[25],[30] 202,032,000 [14],[15],[17]  
Investment, Identifier [Axis]: HGH Purchaser, Inc. (dba Horizon Services), First lien senior secured revolving loan        
Schedule of Investments [Line Items]        
Funded Commitment   0 16,383,000  
Total unfunded commitments   16,548,000 165,000  
Fair Value   (869,000) [27] 0 [19]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [19] 0 0    
Ending balance   (869,000) [27] 0 [19]  
Investment, Identifier [Axis]: Helix Acquisition Holdings, Inc. (dba MW Industries), First lien senior secured loan        
Schedule of Investments [Line Items]        
Fair Value   939,000 [11],[31] 920,000 [14],[15]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[15] 920,000 920,000    
Ending balance   939,000 [11],[31] 920,000 [14],[15]  
Investment, Identifier [Axis]: Hercules Borrower, LLC (dba The Vincit Group), First lien senior secured loan        
Schedule of Investments [Line Items]        
Fair Value   173,292,000 [11],[30] 174,654,000 [14],[15]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[15] 174,654,000 174,654,000    
Ending balance   173,292,000 [11],[30] 174,654,000 [14],[15]  
Investment, Identifier [Axis]: Hercules Borrower, LLC (dba The Vincit Group), First lien senior secured revolving loan        
Schedule of Investments [Line Items]        
Funded Commitment   0 0  
Total unfunded commitments   20,916,000 20,916,000  
Fair Value   0 [27] (52,000) [19]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [19] (52,000) (52,000)    
Ending balance   0 [27] (52,000) [19]  
Investment, Identifier [Axis]: Hercules Buyer, LLC (dba The Vincit Group), Common Units        
Schedule of Investments [Line Items]        
Fair Value   2,676,000 [1],[11],[26] 2,452,000 [14],[28],[29],[53]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[28],[29],[53] 2,452,000 2,452,000    
Ending balance   2,676,000 [1],[11],[26] 2,452,000 [14],[28],[29],[53]  
Investment, Identifier [Axis]: Hercules Buyer, LLC (dba The Vincit Group), Unsecured notes        
Schedule of Investments [Line Items]        
Fair Value   6,355,000 [11],[21],[25] 5,800,000 [14],[24],[53]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[24],[53] 5,800,000 5,800,000    
Ending balance   6,355,000 [11],[21],[25] 5,800,000 [14],[24],[53]  
Investment, Identifier [Axis]: Hg Genesis 8 Sumoco Limited, Unsecured facility        
Schedule of Investments [Line Items]        
Fair Value   13,192,000 [11],[22],[38] 53,019,000 [14],[16],[36]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[16],[36] 53,019,000 53,019,000    
Ending balance   13,192,000 [11],[22],[38] 53,019,000 [14],[16],[36]  
Investment, Identifier [Axis]: Hg Genesis 9 SumoCo Limited, Unsecured facility        
Schedule of Investments [Line Items]        
Fair Value   56,091,000 [11],[22],[39] 53,717,000 [14],[16],[41]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[16],[41] 53,717,000 53,717,000    
Ending balance   56,091,000 [11],[22],[39] 53,717,000 [14],[16],[41]  
Investment, Identifier [Axis]: Hg Saturn Luchaco Limited, Unsecured facility        
Schedule of Investments [Line Items]        
Fair Value   50,701,000 [11],[22],[38] 142,477,000 [14],[16],[36]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[16],[36] 142,477,000 142,477,000    
Ending balance   50,701,000 [11],[22],[38] 142,477,000 [14],[16],[36]  
Investment, Identifier [Axis]: Hissho Parent, LLC, First lien senior secured loan        
Schedule of Investments [Line Items]        
Fair Value [11],[25],[30]   8,466,000    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Ending balance [11],[25],[30]   8,466,000    
Investment, Identifier [Axis]: Hissho Parent, LLC, First lien senior secured revolving loan        
Schedule of Investments [Line Items]        
Funded Commitment   0    
Total unfunded commitments   1,452,000    
Fair Value [27]   0    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Ending balance [27]   0    
Investment, Identifier [Axis]: Hissho Sushi Holdings, LLC, Class A Units        
Schedule of Investments [Line Items]        
Fair Value [1],[11],[26]   97,000    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Ending balance [1],[11],[26]   97,000    
Investment, Identifier [Axis]: Hissho Sushi Holdings, LLC, Class A units        
Schedule of Investments [Line Items]        
Fair Value [14],[28],[29]     100,000  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[28],[29] 100,000 100,000    
Ending balance [14],[28],[29]     100,000  
Investment, Identifier [Axis]: Hissho Sushi Merger Sub, LLC, First lien senior secured loan        
Schedule of Investments [Line Items]        
Fair Value [14],[15]     892,000  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[15] 892,000 892,000    
Ending balance [14],[15]     892,000  
Investment, Identifier [Axis]: Hissho Sushi Merger Sub, LLC, First lien senior secured revolving loan        
Schedule of Investments [Line Items]        
Funded Commitment     0  
Total unfunded commitments     70,000  
Fair Value [19]     0  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [19] 0 0    
Ending balance [19]     0  
Investment, Identifier [Axis]: Hockey Parent Holdings, L.P., Class A Common Units        
Schedule of Investments [Line Items]        
Fair Value [1],[11],[26]   11,173,000    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Ending balance [1],[11],[26]   11,173,000    
Investment, Identifier [Axis]: Hockey Parent Holdings, L.P., Class A Units        
Schedule of Investments [Line Items]        
Fair Value [14],[28],[29]     10,000,000  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[28],[29] 10,000,000 10,000,000    
Ending balance [14],[28],[29]     10,000,000  
Investment, Identifier [Axis]: Hyland Software, Inc., First lien senior secured loan        
Schedule of Investments [Line Items]        
Fair Value   52,637,000 [11],[31] 52,371,000 [14],[18]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[18] 52,371,000 52,371,000    
Ending balance   52,637,000 [11],[31] 52,371,000 [14],[18]  
Investment, Identifier [Axis]: Hyland Software, Inc., First lien senior secured revolving loan        
Schedule of Investments [Line Items]        
Funded Commitment   0 0  
Total unfunded commitments   2,520,000 2,520,000  
Fair Value   0 [27] (38,000) [19]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [19] (38,000) (38,000)    
Ending balance   0 [27] (38,000) [19]  
Investment, Identifier [Axis]: IG Investments Holdings, LLC (dba Insight Global), First lien senior secured loan        
Schedule of Investments [Line Items]        
Fair Value   50,059,000 [11],[30] 49,504,000 [14],[15]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[15] 49,504,000 49,504,000    
Ending balance   50,059,000 [11],[30] 49,504,000 [14],[15]  
Investment, Identifier [Axis]: IG Investments Holdings, LLC (dba Insight Global), First lien senior secured revolving loan        
Schedule of Investments [Line Items]        
Funded Commitment   0 0  
Total unfunded commitments   5,294,000 3,974,000  
Fair Value   0 [27] (30,000) [19]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [19] (30,000) (30,000)    
Ending balance   0 [27] (30,000) [19]  
Investment, Identifier [Axis]: IRI Group Holdings, Inc. (f/k/a Circana Group, L.P. (f/k/a The NPD Group, L.P.)), First lien senior secured loan        
Schedule of Investments [Line Items]        
Fair Value [11],[31]   19,242,000    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Ending balance [11],[31]   19,242,000    
Investment, Identifier [Axis]: IRI Group Holdings, Inc. (f/k/a Circana Group, L.P. (f/k/a The NPD Group, L.P.)), First lien senior secured revolving loan        
Schedule of Investments [Line Items]        
Fair Value [11],[25],[30]   302,000    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Ending balance [11],[25],[30]   302,000    
Investment, Identifier [Axis]: IRI Group Holdings, Inc. (f/k/a Circana Group, L.P. (f/k/a The NPD Group, L.P.)), First lien senior secured revolving loan 1        
Schedule of Investments [Line Items]        
Funded Commitment   302,000    
Total unfunded commitments   1,208,000    
Fair Value [27]   0    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Ending balance [27]   0    
Investment, Identifier [Axis]: Icefall Parent, Inc. (dba EngageSmart), First lien senior secured loan        
Schedule of Investments [Line Items]        
Fair Value [11],[31]   22,051,000    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Ending balance [11],[31]   22,051,000    
Investment, Identifier [Axis]: Icefall Parent, Inc. (dba EngageSmart), First lien senior secured revolving loan        
Schedule of Investments [Line Items]        
Funded Commitment   0    
Total unfunded commitments   2,100,000    
Fair Value [27]   0    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Ending balance [27]   0    
Investment, Identifier [Axis]: Ideal Image Development, LLC        
Schedule of Investments [Line Items]        
Fair Value   16,183,000 0  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance 0 0    
Gross Additions [9]   17,467,000    
Gross Reductions [10]   (390,000)    
Net Change in Unrealized Gains (Losses)   (894,000)    
Ending balance   16,183,000 0  
Interest income   638,000    
Dividend income   0    
Other income   14,000    
Investment, Identifier [Axis]: Ideal Image Development, LLC, First lien senior secured delayed draw term loan        
Schedule of Investments [Line Items]        
Fair Value [14],[15],[17],[48]     909,000  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[15],[17],[48] 909,000 909,000    
Ending balance [14],[15],[17],[48]     909,000  
Investment, Identifier [Axis]: Ideal Image Development, LLC, First lien senior secured delayed draw term loan 1        
Schedule of Investments [Line Items]        
Funded Commitment     1,207,000  
Total unfunded commitments     659,000  
Fair Value [19]     0  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [19] 0 0    
Ending balance [19]     0  
Investment, Identifier [Axis]: Ideal Image Development, LLC, First lien senior secured loan        
Schedule of Investments [Line Items]        
Fair Value [14],[15],[48]     11,751,000  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[15],[48] 11,751,000 11,751,000    
Ending balance [14],[15],[48]     11,751,000  
Investment, Identifier [Axis]: Ideal Image Development, LLC, First lien senior secured loan 1        
Schedule of Investments [Line Items]        
Fair Value [11],[30]   4,675,000    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Ending balance [11],[30]   4,675,000    
Investment, Identifier [Axis]: Ideal Image Development, LLC, First lien senior secured loan 2        
Schedule of Investments [Line Items]        
Fair Value [11],[31]   1,275,000    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Ending balance [11],[31]   1,275,000    
Investment, Identifier [Axis]: Ideal Image Development, LLC, First lien senior secured revolving loan        
Schedule of Investments [Line Items]        
Funded Commitment     1,829,000  
Total unfunded commitments     0  
Fair Value   1,482,000 [11],[25],[54] 0 [19]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [19] 0 0    
Ending balance   1,482,000 [11],[25],[54] 0 [19]  
Investment, Identifier [Axis]: Ideal Image Development, LLC, First lien senior secured revolving loan 1        
Schedule of Investments [Line Items]        
Funded Commitment   1,463,000    
Total unfunded commitments   366,000    
Fair Value [27]   0    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Ending balance [27]   0    
Investment, Identifier [Axis]: Ideal Image Development, LLC, First lien senior secured revolving loan 2        
Schedule of Investments [Line Items]        
Funded Commitment   66,000    
Total unfunded commitments   0    
Fair Value [27]   0    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Ending balance [27]   0    
Investment, Identifier [Axis]: Ideal Topco, L.P., Class A-1 Preferred Units        
Schedule of Investments [Line Items]        
Fair Value [1],[11],[26]   8,751,000    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Ending balance [1],[11],[26]   8,751,000    
Investment, Identifier [Axis]: Ideal Topco, L.P., Class A-2 Common Units        
Schedule of Investments [Line Items]        
Fair Value [1],[11],[26]   0    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Ending balance [1],[11],[26]   0    
Investment, Identifier [Axis]: Ideal Tridon Holdings, Inc., First lien senior secured loan        
Schedule of Investments [Line Items]        
Fair Value   26,667,000 [11],[30] 26,620,000 [14],[15]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[15] 26,620,000 26,620,000    
Ending balance   26,667,000 [11],[30] 26,620,000 [14],[15]  
Investment, Identifier [Axis]: Ideal Tridon Holdings, Inc., First lien senior secured revolving loan        
Schedule of Investments [Line Items]        
Funded Commitment   0 0  
Total unfunded commitments   2,561,000 2,561,000  
Fair Value   0 [27] (58,000) [19]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [19] (58,000) (58,000)    
Ending balance   0 [27] (58,000) [19]  
Investment, Identifier [Axis]: Imprivata, Inc., Second lien senior secured loan        
Schedule of Investments [Line Items]        
Fair Value [14],[15]     882,000  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[15] 882,000 882,000    
Ending balance [14],[15]     882,000  
Investment, Identifier [Axis]: Indigo Buyer, Inc. (dba Inovar Packaging Group), First lien senior secured delayed draw term loan        
Schedule of Investments [Line Items]        
Funded Commitment   0    
Total unfunded commitments   3,497,000    
Fair Value [27]   0    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Ending balance [27]   0    
Investment, Identifier [Axis]: Indigo Buyer, Inc. (dba Inovar Packaging Group), First lien senior secured loan        
Schedule of Investments [Line Items]        
Fair Value [14],[15],[17]     926,000  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[15],[17] 926,000 926,000    
Ending balance [14],[15],[17]     926,000  
Investment, Identifier [Axis]: Indigo Buyer, Inc. (dba Inovar Packaging Group), First lien senior secured loan 1        
Schedule of Investments [Line Items]        
Fair Value [11],[25],[30]   879,000    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Ending balance [11],[25],[30]   879,000    
Investment, Identifier [Axis]: Indigo Buyer, Inc. (dba Inovar Packaging Group), First lien senior secured loan 2        
Schedule of Investments [Line Items]        
Fair Value [11],[31]   3,462,000    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Ending balance [11],[31]   3,462,000    
Investment, Identifier [Axis]: Indigo Buyer, Inc. (dba Inovar Packaging Group), First lien senior secured revolving loan        
Schedule of Investments [Line Items]        
Funded Commitment   0 40,000  
Total unfunded commitments   100,000 60,000  
Fair Value   0 [27] 0 [19]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [19] 0 0    
Ending balance   0 [27] 0 [19]  
Investment, Identifier [Axis]: Indikami Bidco, LLC (dba IntegriChain), First lien senior secured delayed draw term loan        
Schedule of Investments [Line Items]        
Funded Commitment     0  
Total unfunded commitments     2,218,000  
Fair Value   126,000 [11],[25],[31] (14,000) [19]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [19] (14,000) (14,000)    
Ending balance   126,000 [11],[25],[31] (14,000) [19]  
Investment, Identifier [Axis]: Indikami Bidco, LLC (dba IntegriChain), First lien senior secured delayed draw term loan 1        
Schedule of Investments [Line Items]        
Funded Commitment   127,000    
Total unfunded commitments   2,092,000    
Fair Value [27]   0    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Ending balance [27]   0    
Investment, Identifier [Axis]: Indikami Bidco, LLC (dba IntegriChain), First lien senior secured loan        
Schedule of Investments [Line Items]        
Fair Value   16,085,000 [11],[31] 12,391,000 [14],[18]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[18] 12,391,000 12,391,000    
Ending balance   16,085,000 [11],[31] 12,391,000 [14],[18]  
Investment, Identifier [Axis]: Indikami Bidco, LLC (dba IntegriChain), First lien senior secured revolving loan        
Schedule of Investments [Line Items]        
Funded Commitment     0  
Total unfunded commitments     1,585,000  
Fair Value   563,000 [11],[25],[31] (36,000) [19]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [19] (36,000) (36,000)    
Ending balance   563,000 [11],[25],[31] (36,000) [19]  
Investment, Identifier [Axis]: Indikami Bidco, LLC (dba IntegriChain), First lien senior secured revolving loan 1        
Schedule of Investments [Line Items]        
Funded Commitment   570,000    
Total unfunded commitments   1,014,000    
Fair Value [27]   0    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Ending balance [27]   0    
Investment, Identifier [Axis]: Innovation Ventures HoldCo, LLC (dba 5 Hour Energy), First lien senior secured loan        
Schedule of Investments [Line Items]        
Fair Value   88,689,000 [11],[25],[31] 123,439,000 [14],[18]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[18] 123,439,000 123,439,000    
Ending balance   88,689,000 [11],[25],[31] 123,439,000 [14],[18]  
Investment, Identifier [Axis]: Inovalon Holdings, Inc., First lien senior secured loan        
Schedule of Investments [Line Items]        
Fair Value [11],[25],[30]   204,879,000    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Ending balance [11],[25],[30]   204,879,000    
Investment, Identifier [Axis]: Inovalon Holdings, Inc., Second lien senior secured loan        
Schedule of Investments [Line Items]        
Fair Value [11],[30]   128,352,000    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Ending balance [11],[30]   128,352,000    
Investment, Identifier [Axis]: Insight CP (Blocker) Holdings, L.P. (dba CivicPlus, LLC), LP Interest        
Schedule of Investments [Line Items]        
Fair Value   1,544,000 [1],[11],[22],[26] 1,331,000 [14],[16],[28],[29]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[16],[28],[29] 1,331,000 1,331,000    
Ending balance   1,544,000 [1],[11],[22],[26] 1,331,000 [14],[16],[28],[29]  
Investment, Identifier [Axis]: Integrity Marketing Acquisition, LLC, First lien senior secured delayed draw term loan        
Schedule of Investments [Line Items]        
Funded Commitment   0    
Total unfunded commitments   6,280,000    
Fair Value   0 [27] 4,087,000 [14],[15],[17],[33]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[15],[17],[33] 4,087,000 4,087,000    
Ending balance   0 [27] 4,087,000 [14],[15],[17],[33]  
Investment, Identifier [Axis]: Integrity Marketing Acquisition, LLC, First lien senior secured delayed draw term loan 1        
Schedule of Investments [Line Items]        
Funded Commitment     4,087,000  
Total unfunded commitments     54,441,000  
Fair Value [19]     0  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [19] 0 0    
Ending balance [19]     0  
Investment, Identifier [Axis]: Integrity Marketing Acquisition, LLC, First lien senior secured loan        
Schedule of Investments [Line Items]        
Fair Value   41,515,000 [11],[30] 157,494,000 [14],[15]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[15] 157,494,000 157,494,000    
Ending balance   41,515,000 [11],[30] 157,494,000 [14],[15]  
Investment, Identifier [Axis]: Integrity Marketing Acquisition, LLC, First lien senior secured revolving loan        
Schedule of Investments [Line Items]        
Funded Commitment   0    
Total unfunded commitments   2,102,000    
Fair Value [27]   0    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Ending balance [27]   0    
Investment, Identifier [Axis]: Integrity Marketing Acquisition, LLC, First lien senior secured revolving loan 1        
Schedule of Investments [Line Items]        
Funded Commitment     0  
Total unfunded commitments     13,533,000  
Fair Value [19]     0  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [19] 0 0    
Ending balance [19]     0  
Investment, Identifier [Axis]: Intelerad Medical Systems Incorporated (fka 11849573 Canada Inc.), First lien senior secured loan        
Schedule of Investments [Line Items]        
Fair Value   120,460,000 [11],[22],[25],[30] 121,308,000 [14],[15],[16]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[15],[16] 121,308,000 121,308,000    
Ending balance   120,460,000 [11],[22],[25],[30] 121,308,000 [14],[15],[16]  
Investment, Identifier [Axis]: Intelerad Medical Systems Incorporated (fka 11849573 Canada Inc.), First lien senior secured revolving loan        
Schedule of Investments [Line Items]        
Funded Commitment   8,135,000 8,135,000  
Total unfunded commitments   0 0  
Fair Value   0 [27] 0 [19]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [19] 0 0    
Ending balance   0 [27] 0 [19]  
Investment, Identifier [Axis]: Interoperability Bidco, Inc. (dba Lyniate), First lien senior secured delayed draw term loan        
Schedule of Investments [Line Items]        
Funded Commitment   0    
Total unfunded commitments   4,444,000    
Fair Value [27]   (111,000)    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Ending balance [27]   (111,000)    
Investment, Identifier [Axis]: Interoperability Bidco, Inc. (dba Lyniate), First lien senior secured loan        
Schedule of Investments [Line Items]        
Fair Value   65,988,000 [11],[25],[30] 64,799,000 [14],[15]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[15] 64,799,000 64,799,000    
Ending balance   65,988,000 [11],[25],[30] 64,799,000 [14],[15]  
Investment, Identifier [Axis]: Interoperability Bidco, Inc. (dba Lyniate), First lien senior secured revolving loan        
Schedule of Investments [Line Items]        
Fair Value   142,000 [11],[25],[31] 2,133,000 [14],[15],[17]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[15],[17] 2,133,000 2,133,000    
Ending balance   142,000 [11],[25],[31] 2,133,000 [14],[15],[17]  
Investment, Identifier [Axis]: Interoperability Bidco, Inc. (dba Lyniate), First lien senior secured revolving loan 1        
Schedule of Investments [Line Items]        
Funded Commitment   274,000 2,212,000  
Total unfunded commitments   4,992,000 3,054,000  
Fair Value   0 [27] 0 [19]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [19] 0 0    
Ending balance   0 [27] 0 [19]  
Investment, Identifier [Axis]: JS Parent, Inc. (dba Jama Software), First lien senior secured loan        
Schedule of Investments [Line Items]        
Fair Value [11],[30]   909,000    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Ending balance [11],[30]   909,000    
Investment, Identifier [Axis]: JS Parent, Inc. (dba Jama Software), First lien senior secured revolving loan        
Schedule of Investments [Line Items]        
Funded Commitment   0    
Total unfunded commitments   88,000    
Fair Value [27]   0    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Ending balance [27]   0    
Investment, Identifier [Axis]: JSG II, Inc., First lien senior secured loan        
Schedule of Investments [Line Items]        
Fair Value [11],[25],[31]   13,495,000    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Ending balance [11],[25],[31]   13,495,000    
Investment, Identifier [Axis]: Jemico, LLC        
Schedule of Investments [Line Items]        
Fair Value   23,100,000 23,100,000  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance 23,100,000 23,100,000    
Ending balance   23,100,000 23,100,000  
Investment, Identifier [Axis]: KABAFUSION Parent, LLC, First lien senior secured loan        
Schedule of Investments [Line Items]        
Fair Value [11],[30]   22,000,000    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Ending balance [11],[30]   22,000,000    
Investment, Identifier [Axis]: KABAFUSION Parent, LLC, First lien senior secured revolving loan        
Schedule of Investments [Line Items]        
Funded Commitment   0    
Total unfunded commitments   2,778,000    
Fair Value [27]   (28,000)    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Ending balance [27]   (28,000)    
Investment, Identifier [Axis]: KENE Acquisition, Inc. (dba Entrust Solutions Group), First lien senior secured delayed draw term loan        
Schedule of Investments [Line Items]        
Fair Value [11],[25],[31]   514,000    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Ending balance [11],[25],[31]   514,000    
Investment, Identifier [Axis]: KENE Acquisition, Inc. (dba Entrust Solutions Group), First lien senior secured delayed draw term loan 1        
Schedule of Investments [Line Items]        
Funded Commitment   532,000    
Total unfunded commitments   4,581,000    
Fair Value [27]   0    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Ending balance [27]   0    
Investment, Identifier [Axis]: KENE Acquisition, Inc. (dba Entrust Solutions Group), First lien senior secured loan        
Schedule of Investments [Line Items]        
Fair Value [11],[30]   11,352,000    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Ending balance [11],[30]   11,352,000    
Investment, Identifier [Axis]: KENE Acquisition, Inc. (dba Entrust Solutions Group), First lien senior secured revolving loan        
Schedule of Investments [Line Items]        
Funded Commitment   0    
Total unfunded commitments   1,534,000    
Fair Value [27]   (19,000)    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Ending balance [27]   (19,000)    
Investment, Identifier [Axis]: KOBHG Holdings, L.P. (dba OB Hospitalist), Class A Interests        
Schedule of Investments [Line Items]        
Fair Value   6,102,000 [1],[11],[26] 5,884,000 [14],[28],[29]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[28],[29] 5,884,000 5,884,000    
Ending balance   6,102,000 [1],[11],[26] 5,884,000 [14],[28],[29]  
Investment, Identifier [Axis]: KPCI Holdings, L.P., Class A Units        
Schedule of Investments [Line Items]        
Fair Value   85,003,000 [1],[11],[26] 44,402,000 [14],[28],[29]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[28],[29] 44,402,000 44,402,000    
Ending balance   85,003,000 [1],[11],[26] 44,402,000 [14],[28],[29]  
Investment, Identifier [Axis]: KPSKY Acquisition, Inc. (dba BluSky), First lien senior secured delayed draw term loan        
Schedule of Investments [Line Items]        
Funded Commitment     4,000  
Total unfunded commitments     290,000  
Fair Value   (16,000) [11],[25],[30] 0 [19]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [19] 0 0    
Ending balance   (16,000) [11],[25],[30] 0 [19]  
Investment, Identifier [Axis]: KPSKY Acquisition, Inc. (dba BluSky), First lien senior secured delayed draw term loan 1        
Schedule of Investments [Line Items]        
Funded Commitment   3,000    
Total unfunded commitments   290,000    
Fair Value [27]   0    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Ending balance [27]   0    
Investment, Identifier [Axis]: KPSKY Acquisition, Inc. (dba BluSky), First lien senior secured loan        
Schedule of Investments [Line Items]        
Fair Value   4,439,000 [11],[25],[30] 4,843,000 [14],[15],[17]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[15],[17] 4,843,000 4,843,000    
Ending balance   4,439,000 [11],[25],[30] 4,843,000 [14],[15],[17]  
Investment, Identifier [Axis]: KRIV Acquisition Inc. (dba Riveron), First lien senior secured delayed draw term loan        
Schedule of Investments [Line Items]        
Funded Commitment     0  
Total unfunded commitments     945,000  
Fair Value [19]     (12,000)  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [19] (12,000) (12,000)    
Ending balance [19]     (12,000)  
Investment, Identifier [Axis]: KRIV Acquisition Inc. (dba Riveron), First lien senior secured loan        
Schedule of Investments [Line Items]        
Fair Value   6,207,000 [11],[25],[30] 6,159,000 [14],[15]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[15] 6,159,000 6,159,000    
Ending balance   6,207,000 [11],[25],[30] 6,159,000 [14],[15]  
Investment, Identifier [Axis]: KRIV Acquisition Inc. (dba Riveron), First lien senior secured revolving loan        
Schedule of Investments [Line Items]        
Funded Commitment   0 0  
Total unfunded commitments   853,000 853,000  
Fair Value   0 [27] (23,000) [19]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [19] (23,000) (23,000)    
Ending balance   0 [27] (23,000) [19]  
Investment, Identifier [Axis]: KUSRP Intermediate, Inc. (dba U.S. Retirement and Benefits Partners), First lien senior secured loan        
Schedule of Investments [Line Items]        
Fair Value   42,154,000 [11],[31] 35,374,000 [14],[15]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[15] 35,374,000 35,374,000    
Ending balance   42,154,000 [11],[31] 35,374,000 [14],[15]  
Investment, Identifier [Axis]: KWOL Acquisition Inc. (dba Worldwide Clinical Trials), Class A Interest        
Schedule of Investments [Line Items]        
Fair Value   5,121,000 [1],[11],[26] 4,518,000 [14],[28],[29]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[28],[29] 4,518,000 4,518,000    
Ending balance   5,121,000 [1],[11],[26] 4,518,000 [14],[28],[29]  
Investment, Identifier [Axis]: KWOL Acquisition Inc. (dba Worldwide Clinical Trials), First lien senior secured loan        
Schedule of Investments [Line Items]        
Fair Value   64,604,000 [11],[30] 62,784,000 [14],[17],[37]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[17],[37] 62,784,000 62,784,000    
Ending balance   64,604,000 [11],[30] 62,784,000 [14],[17],[37]  
Investment, Identifier [Axis]: KWOL Acquisition Inc. (dba Worldwide Clinical Trials), First lien senior secured revolving loan        
Schedule of Investments [Line Items]        
Funded Commitment   0 2,512,000  
Total unfunded commitments   8,838,000 5,860,000  
Fair Value   0 [27] 0 [19]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [19] 0 0    
Ending balance   0 [27] 0 [19]  
Investment, Identifier [Axis]: Kaseya Inc., First lien senior secured delayed draw term loan        
Schedule of Investments [Line Items]        
Funded Commitment     70,000  
Total unfunded commitments     1,065,000  
Fair Value   578,000 [11],[25],[30] 0 [19]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [19] 0 0    
Ending balance   578,000 [11],[25],[30] 0 [19]  
Investment, Identifier [Axis]: Kaseya Inc., First lien senior secured loan        
Schedule of Investments [Line Items]        
Fair Value   19,038,000 [11],[31] 18,915,000 [14],[15],[17]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[15],[17] 18,915,000 18,915,000    
Ending balance   19,038,000 [11],[31] 18,915,000 [14],[15],[17]  
Investment, Identifier [Axis]: Kaseya Inc., First lien senior secured revolving loan        
Schedule of Investments [Line Items]        
Fair Value [14],[17],[18]     283,000  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[17],[18] 283,000 283,000    
Ending balance [14],[17],[18]     283,000  
Investment, Identifier [Axis]: Kaseya Inc., First lien senior secured revolving loan 1        
Schedule of Investments [Line Items]        
Funded Commitment   287,000 286,000  
Total unfunded commitments   850,000 849,000  
Fair Value   0 [27] 0 [19]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [19] 0 0    
Ending balance   0 [27] 0 [19]  
Investment, Identifier [Axis]: Kaseya Inc.,1 First lien senior secured delayed draw term loan        
Schedule of Investments [Line Items]        
Funded Commitment   221,000    
Total unfunded commitments   844,000    
Fair Value [27]   0    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Ending balance [27]   0    
Investment, Identifier [Axis]: Klarna Holding AB, Subordinated Floating Rate Notes        
Schedule of Investments [Line Items]        
Fair Value [11],[22],[30]   1,000,000    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Ending balance [11],[22],[30]   1,000,000    
Investment, Identifier [Axis]: Knockout Intermediate Holdings I Inc. (dba Kaseya Inc.), Perpetual Preferred Stock        
Schedule of Investments [Line Items]        
Fair Value   19,423,000 [11],[26],[50] 15,688,000 [14],[24],[29]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[24],[29] 15,688,000 15,688,000    
Ending balance   19,423,000 [11],[26],[50] 15,688,000 [14],[24],[29]  
Investment, Identifier [Axis]: LSI Financing 1 DAC        
Schedule of Investments [Line Items]        
Fair Value   4,771,000 19,988,000 6,175,000
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance 19,988,000 19,988,000 6,175,000  
Gross Additions 15,045,000 14,247,000 [9]    
Gross Reductions (2,265,000) (28,488,000) [10]    
Net Change in Unrealized Gains (Losses) 1,033,000 (976,000)    
Ending balance   4,771,000 19,988,000 6,175,000
Interest income 0 0    
Dividend income 252,000 115,000    
Other income 0 0    
Investment, Identifier [Axis]: LSI Financing 1 DAC, Preferred Equity        
Schedule of Investments [Line Items]        
Fair Value [14],[16],[29],[55]     19,988,000  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[16],[29],[55] 19,988,000 19,988,000    
Ending balance [14],[16],[29],[55]     19,988,000  
Investment, Identifier [Axis]: LSI Financing 1 DAC, Preferred equity        
Schedule of Investments [Line Items]        
Fair Value [11],[21],[22],[25],[26]   4,771,000    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Ending balance [11],[21],[22],[25],[26]   4,771,000    
Investment, Identifier [Axis]: LSI Financing LLC        
Schedule of Investments [Line Items]        
Fair Value   158,824,000 0  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance 0 0    
Gross Additions [9]   208,466,000    
Gross Reductions [10]   (52,463,000)    
Net Change in Unrealized Gains (Losses)   2,821,000    
Ending balance   158,824,000 0  
Interest income   0    
Dividend income   817,000    
Other income   0    
Investment, Identifier [Axis]: LSI Financing LLC, Common Equity        
Schedule of Investments [Line Items]        
Fair Value [11],[21],[22],[25],[26],[44]   158,824,000    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Ending balance [11],[21],[22],[25],[26],[44]   158,824,000    
Investment, Identifier [Axis]: LSI Financing LLC, Common Equity 1        
Schedule of Investments [Line Items]        
Funded Commitment   156,004,000    
Total unfunded commitments   3,188,000    
Fair Value [27]   0    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Ending balance [27]   0    
Investment, Identifier [Axis]: Lakefield Acquisition Corp. (dba Lakefield Veterinary Group), First lien senior secured delayed draw term loan        
Schedule of Investments [Line Items]        
Funded Commitment   3,000    
Total unfunded commitments   397,000    
Fair Value [27]   0    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Ending balance [27]   0    
Investment, Identifier [Axis]: Lakefield Acquisition Corp. (dba Lakefield Veterinary Group), First lien senior secured loan        
Schedule of Investments [Line Items]        
Fair Value [11],[25],[31]   565,000    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Ending balance [11],[25],[31]   565,000    
Investment, Identifier [Axis]: Lakefield Acquisition Corp. (dba Lakefield Veterinary Group), First lien senior secured revolving loan        
Schedule of Investments [Line Items]        
Funded Commitment   0    
Total unfunded commitments   67,000    
Fair Value [27]   0    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Ending balance [27]   0    
Investment, Identifier [Axis]: Lightbeam Bidco, Inc. (dba Lazer Spot), First lien senior secured loan        
Schedule of Investments [Line Items]        
Fair Value   4,477,000 [11],[25],[30] 4,524,000 [14],[15]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[15] 4,524,000 4,524,000    
Ending balance   4,477,000 [11],[25],[30] 4,524,000 [14],[15]  
Investment, Identifier [Axis]: Lightbeam Bidco, Inc. (dba Lazer Spot), First lien senior secured revolving loan        
Schedule of Investments [Line Items]        
Funded Commitment     0  
Total unfunded commitments     476,000  
Fair Value [19]     0  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [19] 0 0    
Ending balance [19]     0  
Investment, Identifier [Axis]: Lightbeam Bidco, Inc. (dba Lazer Spot), First lien senior secured revolving loan 1        
Schedule of Investments [Line Items]        
Funded Commitment   0    
Total unfunded commitments   476,000    
Fair Value [27]   0    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Ending balance [27]   0    
Investment, Identifier [Axis]: Lignetics Investment Corp., First lien senior secured loan        
Schedule of Investments [Line Items]        
Fair Value   39,212,000 [11],[25],[30] 34,378,000 [14],[15]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[15] 34,378,000 34,378,000    
Ending balance   39,212,000 [11],[25],[30] 34,378,000 [14],[15]  
Investment, Identifier [Axis]: Lignetics Investment Corp., First lien senior secured revolving loan        
Schedule of Investments [Line Items]        
Funded Commitment   3,451,000    
Total unfunded commitments   1,255,000    
Fair Value   3,427,000 [11],[25],[30] 3,886,000 [14],[15],[17]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[15],[17] 3,886,000 3,886,000    
Ending balance   3,427,000 [11],[25],[30] 3,886,000 [14],[15],[17]  
Investment, Identifier [Axis]: Lignetics Investment Corp., First lien senior secured revolving loan 1        
Schedule of Investments [Line Items]        
Funded Commitment     3,922,000  
Total unfunded commitments     784,000  
Fair Value [19]     0  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [19] 0 0    
Ending balance [19]     0  
Investment, Identifier [Axis]: Lignetics Investment Corp., First lien senior secured revolving loan 2        
Schedule of Investments [Line Items]        
Fair Value [27]   0    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Ending balance [27]   0    
Investment, Identifier [Axis]: LineStar Integrity Services LLC, First lien senior secured loan        
Schedule of Investments [Line Items]        
Fair Value   66,800,000 [11],[25],[30] 49,016,000 [14],[37]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[37] 49,016,000 49,016,000    
Ending balance   66,800,000 [11],[25],[30] 49,016,000 [14],[37]  
Investment, Identifier [Axis]: LineStar Integrity Services LLC, First lien senior secured revolving loan        
Schedule of Investments [Line Items]        
Funded Commitment   9,903,000    
Total unfunded commitments   0    
Fair Value   0 [27] 9,383,000 [14],[15]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[15] 9,383,000 9,383,000    
Ending balance   0 [27] 9,383,000 [14],[15]  
Investment, Identifier [Axis]: LineStar Integrity Services LLC, First lien senior secured revolving loan 1        
Schedule of Investments [Line Items]        
Funded Commitment     9,903,000  
Total unfunded commitments     0  
Fair Value [19]     0  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [19] 0 0    
Ending balance [19]     0  
Investment, Identifier [Axis]: Litera Bidco LLC, First lien senior secured delayed draw term loan 1        
Schedule of Investments [Line Items]        
Funded Commitment   16,181,000    
Total unfunded commitments   18,279,000    
Fair Value [27]   0    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Ending balance [27]   0    
Investment, Identifier [Axis]: Litera Bidco LLC, First lien senior secured delayed draw term loan 2        
Schedule of Investments [Line Items]        
Funded Commitment   0    
Total unfunded commitments   14,361,000    
Fair Value [27]   (36,000)    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Ending balance [27]   (36,000)    
Investment, Identifier [Axis]: Litera Bidco LLC, First lien senior secured loan        
Schedule of Investments [Line Items]        
Fair Value   139,106,000 [11],[25],[31] 147,158,000 [14],[18]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[18] 147,158,000 147,158,000    
Ending balance   139,106,000 [11],[25],[31] 147,158,000 [14],[18]  
Investment, Identifier [Axis]: Litera Bidco LLC, First lien senior secured revolving loan        
Schedule of Investments [Line Items]        
Funded Commitment   0 0  
Total unfunded commitments   8,174,000 5,738,000  
Fair Value   (20,000) [27] 0 [19]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [19] 0 0    
Ending balance   (20,000) [27] 0 [19]  
Investment, Identifier [Axis]: Long Island Custom Windows, LLC        
Schedule of Investments [Line Items]        
Fair Value     28,900,000  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance 28,900,000 28,900,000    
Ending balance     28,900,000  
Investment, Identifier [Axis]: Long Island Custom Windows, LLC        
Schedule of Investments [Line Items]        
Fair Value   28,900,000    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Ending balance   28,900,000    
Investment, Identifier [Axis]: Loparex Midco BV, First lien senior secured loan        
Schedule of Investments [Line Items]        
Fair Value [11],[30]   794,000    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Ending balance [11],[30]   794,000    
Investment, Identifier [Axis]: Lytx, Inc., First lien senior secured loan        
Schedule of Investments [Line Items]        
Fair Value   71,005,000 [11],[31] 70,828,000 [14],[18]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[18] 70,828,000 70,828,000    
Ending balance   71,005,000 [11],[31] 70,828,000 [14],[18]  
Investment, Identifier [Axis]: MHE Intermediate Holdings, LLC (dba OnPoint Group), First lien senior secured loan        
Schedule of Investments [Line Items]        
Fair Value   82,241,000 [11],[25],[30] 115,195,000 [14],[15]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[15] 115,195,000 115,195,000    
Ending balance   82,241,000 [11],[25],[30] 115,195,000 [14],[15]  
Investment, Identifier [Axis]: MHE Intermediate Holdings, LLC (dba OnPoint Group), First lien senior secured revolving loan        
Schedule of Investments [Line Items]        
Funded Commitment   3,107,000 0  
Total unfunded commitments   12,429,000 15,536,000  
Fair Value   0 [27] 0 [19]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [19] 0 0    
Ending balance   0 [27] 0 [19]  
Investment, Identifier [Axis]: MINDBODY, Inc., First lien senior secured loan        
Schedule of Investments [Line Items]        
Fair Value   62,018,000 [11],[25],[30] 64,902,000 [14],[15]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[15] 64,902,000 64,902,000    
Ending balance   62,018,000 [11],[25],[30] 64,902,000 [14],[15]  
Investment, Identifier [Axis]: MINDBODY, Inc., First lien senior secured revolving loan        
Schedule of Investments [Line Items]        
Funded Commitment   0 0  
Total unfunded commitments   6,071,000 6,071,000  
Fair Value   0 [27] (30,000) [19]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [19] (30,000) (30,000)    
Ending balance   0 [27] (30,000) [19]  
Investment, Identifier [Axis]: Maia Aggregator, LP, Class A-2 Units        
Schedule of Investments [Line Items]        
Fair Value   152,000 [1],[11],[26] 169,000 [14],[28],[29]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[28],[29] 169,000 169,000    
Ending balance   152,000 [1],[11],[26] 169,000 [14],[28],[29]  
Investment, Identifier [Axis]: Maple Acquisition, LLC (dba Medicus), First lien senior secured delayed draw term loan        
Schedule of Investments [Line Items]        
Funded Commitment   0    
Total unfunded commitments   12,103,000    
Fair Value [27]   0    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Ending balance [27]   0    
Investment, Identifier [Axis]: Maple Acquisition, LLC (dba Medicus), First lien senior secured loan        
Schedule of Investments [Line Items]        
Fair Value [11],[50]   63,543,000    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Ending balance [11],[50]   63,543,000    
Investment, Identifier [Axis]: Maple Acquisition, LLC (dba Medicus), First lien senior secured revolving loan        
Schedule of Investments [Line Items]        
Funded Commitment   0    
Total unfunded commitments   9,078,000    
Fair Value [27]   0    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Ending balance [27]   0    
Investment, Identifier [Axis]: Mario Midco Holdings, Inc. (dba Len the Plumber), Unsecured facility        
Schedule of Investments [Line Items]        
Fair Value   5,434,000 [11],[31] 4,750,000 [14],[18]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[18] 4,750,000 4,750,000    
Ending balance   5,434,000 [11],[31] 4,750,000 [14],[18]  
Investment, Identifier [Axis]: Mario Purchaser, LLC (dba Len the Plumber), First lien senior secured delayed draw term loan        
Schedule of Investments [Line Items]        
Funded Commitment   457,000 3,143,000  
Total unfunded commitments   4,143,000 3,729,000  
Fair Value   0 [27] 0 [19]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [19] 0 0    
Ending balance   0 [27] 0 [19]  
Investment, Identifier [Axis]: Mario Purchaser, LLC (dba Len the Plumber), First lien senior secured loan        
Schedule of Investments [Line Items]        
Fair Value   19,419,000 [11],[25],[31] 15,973,000 [14],[17],[18]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[17],[18] 15,973,000 15,973,000    
Ending balance   19,419,000 [11],[25],[31] 15,973,000 [14],[17],[18]  
Investment, Identifier [Axis]: Mario Purchaser, LLC (dba Len the Plumber), First lien senior secured revolving loan        
Schedule of Investments [Line Items]        
Fair Value   376,000 [11],[25],[31] 407,000 [14],[17],[18]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[17],[18] 407,000 407,000    
Ending balance   376,000 [11],[25],[31] 407,000 [14],[17],[18]  
Investment, Identifier [Axis]: Mario Purchaser, LLC (dba Len the Plumber), First lien senior secured revolving loan 1        
Schedule of Investments [Line Items]        
Funded Commitment   414,000 414,000  
Total unfunded commitments   967,000 967,000  
Fair Value   0 [27] 0 [19]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [19] 0 0    
Ending balance   0 [27] 0 [19]  
Investment, Identifier [Axis]: Medline Borrower, LP, First lien senior secured revolving loan        
Schedule of Investments [Line Items]        
Funded Commitment     0  
Total unfunded commitments     7,190,000  
Fair Value [19]     (72,000)  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [19] (72,000) (72,000)    
Ending balance [19]     (72,000)  
Investment, Identifier [Axis]: MessageBird BidCo B.V., First lien senior secured loan        
Schedule of Investments [Line Items]        
Fair Value [14],[16],[18]     38,404,000  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[16],[18] 38,404,000 38,404,000    
Ending balance [14],[16],[18]     38,404,000  
Investment, Identifier [Axis]: MessageBird Holding B.V., Extended Series C Warrants        
Schedule of Investments [Line Items]        
Fair Value [14],[16],[28],[29]     144,000  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[16],[28],[29] 144,000 144,000    
Ending balance [14],[16],[28],[29]     144,000  
Investment, Identifier [Axis]: Metis HoldCo, Inc. (dba Mavis Tire Express Services), Series A Convertible Preferred Stock        
Schedule of Investments [Line Items]        
Fair Value   193,023,000 [11],[21],[26] 180,015,000 [14],[24],[29]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[24],[29] 180,015,000 180,015,000    
Ending balance   193,023,000 [11],[21],[26] 180,015,000 [14],[24],[29]  
Investment, Identifier [Axis]: Midwest Custom Windows, LLC        
Schedule of Investments [Line Items]        
Fair Value   24,100,000    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Ending balance   24,100,000    
Investment, Identifier [Axis]: Midwest Custom Windows, LLC        
Schedule of Investments [Line Items]        
Fair Value     24,100,000  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance 24,100,000 24,100,000    
Ending balance     24,100,000  
Investment, Identifier [Axis]: Milan Laser Holdings LLC, First lien senior secured loan        
Schedule of Investments [Line Items]        
Fair Value   23,567,000 [11],[30] 23,811,000 [14],[18]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[18] 23,811,000 23,811,000    
Ending balance   23,567,000 [11],[30] 23,811,000 [14],[18]  
Investment, Identifier [Axis]: Milan Laser Holdings LLC, First lien senior secured revolving loan        
Schedule of Investments [Line Items]        
Funded Commitment   0 0  
Total unfunded commitments   3,007,000 3,007,000  
Fair Value   0 [27] 0 [19]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [19] 0 0    
Ending balance   0 [27] 0 [19]  
Investment, Identifier [Axis]: Minerva Holdco, Inc., Senior A Preferred Stock        
Schedule of Investments [Line Items]        
Fair Value [11],[21],[26]   9,231,000    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Ending balance [11],[21],[26]   9,231,000    
Investment, Identifier [Axis]: Minerva Holdco, Inc., Series A Preferred Stock        
Schedule of Investments [Line Items]        
Fair Value [14],[24],[29]     8,092,000  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[24],[29] 8,092,000 8,092,000    
Ending balance [14],[24],[29]     8,092,000  
Investment, Identifier [Axis]: Ministry Brands Holdings, LLC, First lien senior secured loan        
Schedule of Investments [Line Items]        
Fair Value   751,000 [11],[31] 749,000 [14],[18]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[18] 749,000 749,000    
Ending balance   751,000 [11],[31] 749,000 [14],[18]  
Investment, Identifier [Axis]: Ministry Brands Holdings, LLC, First lien senior secured revolving loan        
Schedule of Investments [Line Items]        
Funded Commitment   0    
Total unfunded commitments   68,000    
Fair Value   (1,000) [27] 35,000 [14],[17],[18]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[17],[18] 35,000 35,000    
Ending balance   (1,000) [27] 35,000 [14],[17],[18]  
Investment, Identifier [Axis]: Ministry Brands Holdings, LLC, First lien senior secured revolving loan 1        
Schedule of Investments [Line Items]        
Funded Commitment     36,000  
Total unfunded commitments     32,000  
Fair Value [19]     0  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [19] 0 0    
Ending balance [19]     0  
Investment, Identifier [Axis]: Minotaur Acquisition, Inc. (dba Inspira Financial), First lien senior secured delayed draw term loan        
Schedule of Investments [Line Items]        
Funded Commitment   0    
Total unfunded commitments   24,666,000    
Fair Value [27]   0    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Ending balance [27]   0    
Investment, Identifier [Axis]: Minotaur Acquisition, Inc. (dba Inspira Financial), First lien senior secured loan        
Schedule of Investments [Line Items]        
Fair Value [11],[25],[31]   171,428,000    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Ending balance [11],[25],[31]   171,428,000    
Investment, Identifier [Axis]: Minotaur Acquisition, Inc. (dba Inspira Financial), First lien senior secured revolving loan        
Schedule of Investments [Line Items]        
Funded Commitment   0    
Total unfunded commitments   15,174,000    
Fair Value [27]   (76,000)    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Ending balance [27]   (76,000)    
Investment, Identifier [Axis]: Monotype Imaging Holdings Inc., First lien senior secured delayed draw term loan        
Schedule of Investments [Line Items]        
Funded Commitment   2,222,000    
Total unfunded commitments   7,314,000    
Fair Value [27]   0    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Ending balance [27]   0    
Investment, Identifier [Axis]: Monotype Imaging Holdings Inc., First lien senior secured loan        
Schedule of Investments [Line Items]        
Fair Value [11],[25],[30]   115,790,000    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Ending balance [11],[25],[30]   115,790,000    
Investment, Identifier [Axis]: Monotype Imaging Holdings Inc., First lien senior secured revolving loan        
Schedule of Investments [Line Items]        
Funded Commitment   0    
Total unfunded commitments   14,304,000    
Fair Value [27]   (36,000)    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Ending balance [27]   (36,000)    
Investment, Identifier [Axis]: Motus Group, LLC, Second lien senior secured loan        
Schedule of Investments [Line Items]        
Fair Value [14],[18]     10,702,000  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[18] 10,702,000 10,702,000    
Ending balance [14],[18]     10,702,000  
Investment, Identifier [Axis]: NELIPAK EUROPEAN HOLDINGS COÖPERATIEF U.A., First lien senior secured EUR delayed draw term loan        
Schedule of Investments [Line Items]        
Funded Commitment   (4,000)    
Total unfunded commitments   14,565,000    
Fair Value [27]   (182,000)    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Ending balance [27]   (182,000)    
Investment, Identifier [Axis]: NELIPAK EUROPEAN HOLDINGS COÖPERATIEF U.A., First lien senior secured EUR revolving loan        
Schedule of Investments [Line Items]        
Funded Commitment   890,000    
Total unfunded commitments   1,827,000    
Fair Value [27]   0    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Ending balance [27]   0    
Investment, Identifier [Axis]: NELIPAK EUROPEAN HOLDINGS COÖPERATIEF U.A., First lien senior secured EUR term loan        
Schedule of Investments [Line Items]        
Fair Value [11],[25],[56]   37,621,000    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Ending balance [11],[25],[56]   37,621,000    
Investment, Identifier [Axis]: NMI Acquisitionco, Inc. (dba Network Merchants), First lien senior secured loan        
Schedule of Investments [Line Items]        
Fair Value   36,001,000 [11],[25],[31] 36,202,000 [14],[18]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[18] 36,202,000 36,202,000    
Ending balance   36,001,000 [11],[25],[31] 36,202,000 [14],[18]  
Investment, Identifier [Axis]: NMI Acquisitionco, Inc. (dba Network Merchants), First lien senior secured revolving loan        
Schedule of Investments [Line Items]        
Funded Commitment   0 0  
Total unfunded commitments   1,652,000 1,652,000  
Fair Value   0 [27] (8,000) [19]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [19] (8,000) (8,000)    
Ending balance   0 [27] (8,000) [19]  
Investment, Identifier [Axis]: National Dentex Labs LLC (fka Barracuda Dental LLC), First lien senior secured delayed draw term loan        
Schedule of Investments [Line Items]        
Fair Value [11],[54]   6,361,000    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Ending balance [11],[54]   6,361,000    
Investment, Identifier [Axis]: National Dentex Labs LLC (fka Barracuda Dental LLC), First lien senior secured delayed draw term loan 1        
Schedule of Investments [Line Items]        
Funded Commitment   4,763,000    
Total unfunded commitments   1,073,000    
Fair Value [27]   0    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Ending balance [27]   0    
Investment, Identifier [Axis]: National Dentex Labs LLC (fka Barracuda Dental LLC), First lien senior secured loan        
Schedule of Investments [Line Items]        
Fair Value   91,281,000 [11],[25],[30] 106,307,000 [14],[15]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[15] 106,307,000 106,307,000    
Ending balance   91,281,000 [11],[25],[30] 106,307,000 [14],[15]  
Investment, Identifier [Axis]: National Dentex Labs LLC (fka Barracuda Dental LLC), First lien senior secured revolving loan        
Schedule of Investments [Line Items]        
Fair Value   5,057,000 [11],[25],[30] 6,860,000 [14],[17],[18]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[17],[18] 6,860,000 6,860,000    
Ending balance   5,057,000 [11],[25],[30] 6,860,000 [14],[17],[18]  
Investment, Identifier [Axis]: National Dentex Labs LLC (fka Barracuda Dental LLC), First lien senior secured revolving loan 1        
Schedule of Investments [Line Items]        
Funded Commitment   7,071,000 7,024,000  
Total unfunded commitments   2,295,000 2,341,000  
Fair Value   0 [27] 0 [19]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [19] 0 0    
Ending balance   0 [27] 0 [19]  
Investment, Identifier [Axis]: Natural Partners, LLC, First lien senior secured loan        
Schedule of Investments [Line Items]        
Fair Value   1,226,000 [11],[22],[25],[30] 910,000 [14],[15],[16]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[15],[16] 910,000 910,000    
Ending balance   1,226,000 [11],[22],[25],[30] 910,000 [14],[15],[16]  
Investment, Identifier [Axis]: Natural Partners, LLC, First lien senior secured revolving loan        
Schedule of Investments [Line Items]        
Funded Commitment   0 0  
Total unfunded commitments   159,000 68,000  
Fair Value   (1,000) [27] 0 [19]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [19] 0 0    
Ending balance   (1,000) [27] 0 [19]  
Investment, Identifier [Axis]: Nelipak Holding Company, First lien senior secured EUR revolving loan        
Schedule of Investments [Line Items]        
Fair Value [14],[17],[57]     1,628,000  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[17],[57] 1,628,000 1,628,000    
Ending balance [14],[17],[57]     1,628,000  
Investment, Identifier [Axis]: Nelipak Holding Company, First lien senior secured EUR revolving loan 1        
Schedule of Investments [Line Items]        
Funded Commitment     1,628,000  
Total unfunded commitments     5,675,000  
Fair Value [19]     0  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [19] 0 0    
Ending balance [19]     0  
Investment, Identifier [Axis]: Nelipak Holding Company, First lien senior secured USD revolving loan        
Schedule of Investments [Line Items]        
Fair Value [14],[17],[18]     2,010,000  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[17],[18] 2,010,000 2,010,000    
Ending balance [14],[17],[18]     2,010,000  
Investment, Identifier [Axis]: Nelipak Holding Company, First lien senior secured USD revolving loan 1        
Schedule of Investments [Line Items]        
Funded Commitment     2,010,000  
Total unfunded commitments     5,360,000  
Fair Value [19]     0  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [19] 0 0    
Ending balance [19]     0  
Investment, Identifier [Axis]: Nelipak Holding Company, First lien senior secured delayed draw term loan        
Schedule of Investments [Line Items]        
Funded Commitment   0    
Total unfunded commitments   7,680,000    
Fair Value [27]   (96,000)    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Ending balance [27]   (96,000)    
Investment, Identifier [Axis]: Nelipak Holding Company, First lien senior secured loan        
Schedule of Investments [Line Items]        
Fair Value   21,692,000 [11],[25],[31] 2,262,000 [14],[15]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[15] 2,262,000 2,262,000    
Ending balance   21,692,000 [11],[25],[31] 2,262,000 [14],[15]  
Investment, Identifier [Axis]: Nelipak Holding Company, First lien senior secured revolving loan        
Schedule of Investments [Line Items]        
Funded Commitment   2,407,000    
Total unfunded commitments   3,324,000    
Fair Value [27]   0    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Ending balance [27]   0    
Investment, Identifier [Axis]: Nelipak Holding Company, Second lien EUR senior secured loan        
Schedule of Investments [Line Items]        
Fair Value [14],[41]     66,224,000  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[41] 66,224,000 66,224,000    
Ending balance [14],[41]     66,224,000  
Investment, Identifier [Axis]: Nelipak Holding Company, Second lien USD senior secured loan        
Schedule of Investments [Line Items]        
Fair Value [14],[15]     67,006,000  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[15] 67,006,000 67,006,000    
Ending balance [14],[15]     67,006,000  
Investment, Identifier [Axis]: Nellson Nutraceutical, LLC, First lien senior secured loan        
Schedule of Investments [Line Items]        
Fair Value   25,567,000 [11],[25],[31] 25,334,000 [14],[15]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[15] 25,334,000 25,334,000    
Ending balance   25,567,000 [11],[25],[31] 25,334,000 [14],[15]  
Investment, Identifier [Axis]: New PLI Holdings, LLC (dba PLI), Class A Common Units        
Schedule of Investments [Line Items]        
Fair Value   92,705,000 [1],[11],[26] 97,757,000 [14],[23],[28],[29]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[23],[28],[29] 97,757,000 97,757,000    
Ending balance   92,705,000 [1],[11],[26] 97,757,000 [14],[23],[28],[29]  
Investment, Identifier [Axis]: Non-controlled/affiliated - revolving debt commitments        
Schedule of Investments [Line Items]        
Funded Commitment      
Total unfunded commitments      
Fair Value [19]      
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [19]    
Ending balance [19]      
Investment, Identifier [Axis]: Norvax, LLC (dba GoHealth), First lien senior secured loan        
Schedule of Investments [Line Items]        
Fair Value [14],[15]     73,390,000  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[15] 73,390,000 73,390,000    
Ending balance [14],[15]     73,390,000  
Investment, Identifier [Axis]: Norvax, LLC (dba GoHealth), First lien senior secured revolving loan        
Schedule of Investments [Line Items]        
Funded Commitment     0  
Total unfunded commitments     12,273,000  
Fair Value   2,080,000 [11],[25],[30] (153,000) [19]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [19] (153,000) (153,000)    
Ending balance   2,080,000 [11],[25],[30] (153,000) [19]  
Investment, Identifier [Axis]: Norvax, LLC (dba GoHealth), First lien senior secured revolving loan 1        
Schedule of Investments [Line Items]        
Funded Commitment   2,080,000    
Total unfunded commitments   4,056,000    
Fair Value [27]   0    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Ending balance [27]   0    
Investment, Identifier [Axis]: Notorious Topco, LLC (dba Beauty Industry Group), First lien senior secured loan        
Schedule of Investments [Line Items]        
Fair Value   105,883,000 [11],[25],[30] 110,036,000 [14],[15]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[15] 110,036,000 110,036,000    
Ending balance   105,883,000 [11],[25],[30] 110,036,000 [14],[15]  
Investment, Identifier [Axis]: Notorious Topco, LLC (dba Beauty Industry Group), First lien senior secured revolving loan        
Schedule of Investments [Line Items]        
Funded Commitment   0    
Total unfunded commitments   9,577,000    
Fair Value   (1,054,000) [27] 16,000 [14],[15],[17]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[15],[17] 16,000 16,000    
Ending balance   (1,054,000) [27] 16,000 [14],[15],[17]  
Investment, Identifier [Axis]: Notorious Topco, LLC (dba Beauty Industry Group), First lien senior secured revolving loan 1        
Schedule of Investments [Line Items]        
Funded Commitment     638,000  
Total unfunded commitments     8,939,000  
Fair Value [19]     0  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [19] 0 0    
Ending balance [19]     0  
Investment, Identifier [Axis]: OB Hospitalist Group, Inc., First lien senior secured loan        
Schedule of Investments [Line Items]        
Fair Value   107,321,000 [11],[25],[31] 92,656,000 [14],[15]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[15] 92,656,000 92,656,000    
Ending balance   107,321,000 [11],[25],[31] 92,656,000 [14],[15]  
Investment, Identifier [Axis]: OB Hospitalist Group, Inc., First lien senior secured revolving loan        
Schedule of Investments [Line Items]        
Funded Commitment   0    
Total unfunded commitments   15,148,000    
Fair Value   (38,000) [27] 5,668,000 [14],[17],[18]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[17],[18] 5,668,000 5,668,000    
Ending balance   (38,000) [27] 5,668,000 [14],[17],[18]  
Investment, Identifier [Axis]: OB Hospitalist Group, Inc., First lien senior secured revolving loan 1        
Schedule of Investments [Line Items]        
Funded Commitment     5,857,000  
Total unfunded commitments     9,291,000  
Fair Value [19]     0  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [19] 0 0    
Ending balance [19]     0  
Investment, Identifier [Axis]: OBDC SLF LLC (fka Blue Owl Capital Corporation Senior Loan Fund LLC)(c)        
Schedule of Investments [Line Items]        
Fair Value [46]   0 342,786,000  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [46] 342,786,000 342,786,000    
Gross Additions [12],[46]   122,153,000    
Gross Reductions [13],[46]   (475,116,000)    
Net Change in Unrealized Gains (Losses) [46]   10,177,000    
Ending balance [46]   0 342,786,000  
Interest income [46]   0    
Dividend income [46]   43,878,000    
Other income [46]   0    
Investment, Identifier [Axis]: Ocala Bidco, Inc., First lien senior secured delayed draw term loan        
Schedule of Investments [Line Items]        
Funded Commitment     0  
Total unfunded commitments     18,988,000  
Fair Value [19]     0  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [19] 0 0    
Ending balance [19]     0  
Investment, Identifier [Axis]: Ocala Bidco, Inc., First lien senior secured loan        
Schedule of Investments [Line Items]        
Fair Value [14],[18]     186,005,000  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[18] 186,005,000 186,005,000    
Ending balance [14],[18]     186,005,000  
Investment, Identifier [Axis]: Ocala Bidco, Inc., Second lien senior secured loan        
Schedule of Investments [Line Items]        
Fair Value [14],[18]     112,217,000  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[18] 112,217,000 112,217,000    
Ending balance [14],[18]     112,217,000  
Investment, Identifier [Axis]: Offen, Inc., First lien senior secured loan        
Schedule of Investments [Line Items]        
Fair Value   18,588,000 [11],[25],[31] 18,641,000 [14],[18]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[18] 18,641,000 18,641,000    
Ending balance   18,588,000 [11],[25],[31] 18,641,000 [14],[18]  
Investment, Identifier [Axis]: Ole Smoky Distillery, LLC, First lien senior secured loan        
Schedule of Investments [Line Items]        
Fair Value   853,000 [11],[31] 855,000 [14],[18]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[18] 855,000 855,000    
Ending balance   853,000 [11],[31] 855,000 [14],[18]  
Investment, Identifier [Axis]: Ole Smoky Distillery, LLC, First lien senior secured revolving loan        
Schedule of Investments [Line Items]        
Funded Commitment   0 0  
Total unfunded commitments   116,000 116,000  
Fair Value   (1,000) [27] (2,000) [19]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [19] (2,000) (2,000)    
Ending balance   (1,000) [27] (2,000) [19]  
Investment, Identifier [Axis]: PCF Holdco, LLC (dba PCF Insurance Services), Class A Unit Warrants        
Schedule of Investments [Line Items]        
Fair Value [14],[28],[29]     4,331,000  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[28],[29] 4,331,000 4,331,000    
Ending balance [14],[28],[29]     4,331,000  
Investment, Identifier [Axis]: PCF Holdco, LLC (dba PCF Insurance Services), Class A Units        
Schedule of Investments [Line Items]        
Fair Value   69,015,000 [1],[11],[26] 68,357,000 [14],[28],[29]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[28],[29] 68,357,000 68,357,000    
Ending balance   69,015,000 [1],[11],[26] 68,357,000 [14],[28],[29]  
Investment, Identifier [Axis]: PCF Holdco, LLC (dba PCF Insurance Services), Preferred equity        
Schedule of Investments [Line Items]        
Fair Value [11],[21],[26]   19,077,000    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Ending balance [11],[21],[26]   19,077,000    
Investment, Identifier [Axis]: PCF Holdco, LLC (dba PCF Insurance Services), Series A Preferred Units        
Schedule of Investments [Line Items]        
Fair Value [14],[24],[29]     13,850,000  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[24],[29] 13,850,000 13,850,000    
Ending balance [14],[24],[29]     13,850,000  
Investment, Identifier [Axis]: PCF Holdco, LLC (dba PCF Insurance Services), Warrants        
Schedule of Investments [Line Items]        
Fair Value [1],[11],[26]   4,065,000    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Ending balance [1],[11],[26]   4,065,000    
Investment, Identifier [Axis]: PCF Midco II, LLC (dba PCF Insurance Services), First lien senior secured loan        
Schedule of Investments [Line Items]        
Fair Value   150,459,000 [11],[21] 134,133,000 [14],[24]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[24] 134,133,000 134,133,000    
Ending balance   150,459,000 [11],[21] 134,133,000 [14],[24]  
Investment, Identifier [Axis]: PDI TA Holdings, Inc., First lien senior secured delayed draw term loan        
Schedule of Investments [Line Items]        
Fair Value [11],[25],[30]   1,909,000    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Ending balance [11],[25],[30]   1,909,000    
Investment, Identifier [Axis]: PDI TA Holdings, Inc., First lien senior secured delayed draw term loan 1        
Schedule of Investments [Line Items]        
Funded Commitment   1,936,000    
Total unfunded commitments   1,531,000    
Fair Value [27]   0    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Ending balance [27]   0    
Investment, Identifier [Axis]: PDI TA Holdings, Inc., First lien senior secured loan        
Schedule of Investments [Line Items]        
Fair Value [11],[30]   14,779,000    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Ending balance [11],[30]   14,779,000    
Investment, Identifier [Axis]: PDI TA Holdings, Inc., First lien senior secured revolving loan        
Schedule of Investments [Line Items]        
Funded Commitment   0    
Total unfunded commitments   1,525,000    
Fair Value [27]   (15,000)    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Ending balance [27]   (15,000)    
Investment, Identifier [Axis]: PHM Netherlands Midco B.V. (dba Loparex), First lien senior secured loan        
Schedule of Investments [Line Items]        
Fair Value [14],[15]     624,000  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[15] 624,000 624,000    
Ending balance [14],[15]     624,000  
Investment, Identifier [Axis]: PHM Netherlands Midco B.V. (dba Loparex), Second lien senior secured loan        
Schedule of Investments [Line Items]        
Fair Value [14],[15]     85,680,000  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[15] 85,680,000 85,680,000    
Ending balance [14],[15]     85,680,000  
Investment, Identifier [Axis]: PHM Netherlands Midco B.V. (dba Loparex), Second lien senior secured loan 1        
Schedule of Investments [Line Items]        
Fair Value [11],[30]   101,640,000    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Ending balance [11],[30]   101,640,000    
Investment, Identifier [Axis]: PHM Netherlands Midco B.V. (dba Loparex), Second lien senior secured loan 2        
Schedule of Investments [Line Items]        
Fair Value [11],[30]   20,003,000    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Ending balance [11],[30]   20,003,000    
Investment, Identifier [Axis]: PPT Holdings III, LLC (dba Park Place Technologies), First lien senior secured loan        
Schedule of Investments [Line Items]        
Fair Value [11],[21]   817,000    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Ending balance [11],[21]   817,000    
Investment, Identifier [Axis]: PPV Intermediate Holdings, LLC, First lien senior secured delayed draw term loan        
Schedule of Investments [Line Items]        
Funded Commitment     0  
Total unfunded commitments     57,000  
Fair Value   57,000 [11],[30] 0 [19]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [19] 0 0    
Ending balance   57,000 [11],[30] 0 [19]  
Investment, Identifier [Axis]: PPV Intermediate Holdings, LLC, First lien senior secured loan        
Schedule of Investments [Line Items]        
Fair Value   928,000 [11],[30] 921,000 [14],[15]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[15] 921,000 921,000    
Ending balance   928,000 [11],[30] 921,000 [14],[15]  
Investment, Identifier [Axis]: PPV Intermediate Holdings, LLC, First lien senior secured revolving loan        
Schedule of Investments [Line Items]        
Funded Commitment   0 0  
Total unfunded commitments   67,000 67,000  
Fair Value   0 [27] (1,000) [19]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [19] (1,000) (1,000)    
Ending balance   0 [27] (1,000) [19]  
Investment, Identifier [Axis]: PS Op Holdings LLC (fka QC Supply, LLC), Class A Common Units        
Schedule of Investments [Line Items]        
Fair Value   0 [1],[26] 475,000 [23],[28],[29]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [23],[28],[29] 475,000 475,000    
Ending balance   0 [1],[26] 475,000 [23],[28],[29]  
Investment, Identifier [Axis]: PS Operating Company LLC (fka QC Supply, LLC)        
Schedule of Investments [Line Items]        
Fair Value   2,916,000 15,809,000 20,361,000
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance 15,809,000 15,809,000 20,361,000  
Gross Additions 546,000 1,327,000 [12]    
Gross Reductions (166,000) (669,000) [13]    
Net Change in Unrealized Gains (Losses) (4,932,000) (13,551,000)    
Ending balance   2,916,000 15,809,000 20,361,000
Interest income 1,987,000 (17,000)    
Dividend income 0 0    
Other income 6,000 0    
Investment, Identifier [Axis]: PS Operating Company LLC (fka QC Supply, LLC), First lien senior secured loan        
Schedule of Investments [Line Items]        
Fair Value   2,916,000 [25],[30],[47] 15,334,000 [15],[17],[23]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [15],[17],[23] 15,334,000 15,334,000    
Ending balance   2,916,000 [25],[30],[47] 15,334,000 [15],[17],[23]  
Investment, Identifier [Axis]: PS Operating Company LLC (fka QC Supply, LLC), First lien senior secured revolving loan        
Schedule of Investments [Line Items]        
Funded Commitment   4,772,000 3,749,000  
Total unfunded commitments   659,000 1,217,000  
Fair Value   0 [27] 0 [19]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [19] 0 0    
Ending balance   0 [27] 0 [19]  
Investment, Identifier [Axis]: Pacific BidCo Inc., First lien senior secured delayed draw term loan        
Schedule of Investments [Line Items]        
Funded Commitment     0  
Total unfunded commitments     3,436,000  
Fair Value [19]     0  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [19] 0 0    
Ending balance [19]     0  
Investment, Identifier [Axis]: Pacific BidCo Inc., First lien senior secured loan        
Schedule of Investments [Line Items]        
Fair Value   35,112,000 [11],[22],[25],[50] 31,149,000 [14],[16],[37]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[16],[37] 31,149,000 31,149,000    
Ending balance   35,112,000 [11],[22],[25],[50] 31,149,000 [14],[16],[37]  
Investment, Identifier [Axis]: Packaging Coordinators Midco, Inc., Second lien senior secured loan        
Schedule of Investments [Line Items]        
Fair Value [14],[18]     195,553,000  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[18] 195,553,000 195,553,000    
Ending balance [14],[18]     195,553,000  
Investment, Identifier [Axis]: Par Technology Corporation, First lien senior secured loan        
Schedule of Investments [Line Items]        
Fair Value [11],[22],[31]   1,273,000    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Ending balance [11],[22],[31]   1,273,000    
Investment, Identifier [Axis]: Paradigmatic Holdco LLC (dba Pluralsight), Common stock        
Schedule of Investments [Line Items]        
Fair Value [1],[11],[25],[26]   16,742,000    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Ending balance [1],[11],[25],[26]   16,742,000    
Investment, Identifier [Axis]: Paris US Holdco, Inc. (dba Precinmac), First lien senior secured delayed draw term loan        
Schedule of Investments [Line Items]        
Funded Commitment   0    
Total unfunded commitments   5,581,000    
Fair Value [27]   (28,000)    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Ending balance [27]   (28,000)    
Investment, Identifier [Axis]: Paris US Holdco, Inc. (dba Precinmac), First lien senior secured loan        
Schedule of Investments [Line Items]        
Fair Value [11],[31]   21,412,000    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Ending balance [11],[31]   21,412,000    
Investment, Identifier [Axis]: Paris US Holdco, Inc. (dba Precinmac), First lien senior secured revolving loan        
Schedule of Investments [Line Items]        
Funded Commitment   0    
Total unfunded commitments   2,791,000    
Fair Value [27]   (28,000)    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Ending balance [27]   (28,000)    
Investment, Identifier [Axis]: Park Place Technologies, LLC, First lien senior secured delayed draw term loan        
Schedule of Investments [Line Items]        
Funded Commitment   0    
Total unfunded commitments   368,000    
Fair Value [27]   0    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Ending balance [27]   0    
Investment, Identifier [Axis]: Park Place Technologies, LLC, First lien senior secured loan        
Schedule of Investments [Line Items]        
Fair Value [11],[31]   2,333,000    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Ending balance [11],[31]   2,333,000    
Investment, Identifier [Axis]: Park Place Technologies, LLC, First lien senior secured revolving loan        
Schedule of Investments [Line Items]        
Fair Value [11],[25],[31]   78,000    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Ending balance [11],[25],[31]   78,000    
Investment, Identifier [Axis]: Park Place Technologies, LLC, First lien senior secured revolving loan 1        
Schedule of Investments [Line Items]        
Funded Commitment   79,000    
Total unfunded commitments   197,000    
Fair Value [27]   0    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Ending balance [27]   0    
Investment, Identifier [Axis]: Patriot Acquisition TopCo S.A.R.L (dba Corza Health, Inc.), First lien senior secured loan        
Schedule of Investments [Line Items]        
Fair Value   124,840,000 [11],[22],[25],[30] 133,661,000 [14],[16],[18]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[16],[18] 133,661,000 133,661,000    
Ending balance   124,840,000 [11],[22],[25],[30] 133,661,000 [14],[16],[18]  
Investment, Identifier [Axis]: Patriot Acquisition TopCo S.A.R.L (dba Corza Health, Inc.), First lien senior secured revolving loan        
Schedule of Investments [Line Items]        
Funded Commitment   0    
Total unfunded commitments   13,538,000    
Fair Value   0 [27] 2,867,000 [14],[15],[16],[17]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[15],[16],[17] 2,867,000 2,867,000    
Ending balance   0 [27] 2,867,000 [14],[15],[16],[17]  
Investment, Identifier [Axis]: Patriot Acquisition TopCo S.A.R.L (dba Corza Health, Inc.), First lien senior secured revolving loan 1        
Schedule of Investments [Line Items]        
Funded Commitment     2,901,000  
Total unfunded commitments     10,637,000  
Fair Value [19]     0  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [19] 0 0    
Ending balance [19]     0  
Investment, Identifier [Axis]: Patriot Holdings SCSp (dba Corza Health, Inc.), Class A Units        
Schedule of Investments [Line Items]        
Fair Value   10,498,000 [11],[21],[22],[26] 9,606,000 [14],[16],[24],[29]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[16],[24],[29] 9,606,000 9,606,000    
Ending balance   10,498,000 [11],[21],[22],[26] 9,606,000 [14],[16],[24],[29]  
Investment, Identifier [Axis]: Patriot Holdings SCSp (dba Corza Health, Inc.), Class B Units        
Schedule of Investments [Line Items]        
Fair Value   448,000 [1],[11],[22],[26] 1,625,000 [14],[16],[28],[29]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[16],[28],[29] 1,625,000 1,625,000    
Ending balance   448,000 [1],[11],[22],[26] 1,625,000 [14],[16],[28],[29]  
Investment, Identifier [Axis]: Peraton Corp., Second lien senior secured loan        
Schedule of Investments [Line Items]        
Fair Value   36,994,000 [11],[30],[32] 45,554,000 [14],[15],[34]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[15],[34] 45,554,000 45,554,000    
Ending balance   36,994,000 [11],[30],[32] 45,554,000 [14],[15],[34]  
Investment, Identifier [Axis]: PerkinElmer U.S. LLC, First lien senior secured delayed draw term loan        
Schedule of Investments [Line Items]        
Funded Commitment   2,944,000    
Total unfunded commitments   984,000    
Fair Value [27]   0    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Ending balance [27]   0    
Investment, Identifier [Axis]: PerkinElmer U.S. LLC, First lien senior secured loan        
Schedule of Investments [Line Items]        
Fair Value [11],[25],[31]   22,147,000    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Ending balance [11],[25],[31]   22,147,000    
Investment, Identifier [Axis]: PerkinElmer U.S. LLC, First lien senior secured loan 1        
Schedule of Investments [Line Items]        
Fair Value [14],[18]     909,000  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[18] 909,000 909,000    
Ending balance [14],[18]     909,000  
Investment, Identifier [Axis]: PerkinElmer U.S. LLC, First lien senior secured loan 2        
Schedule of Investments [Line Items]        
Fair Value [14],[18]     14,477,000  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[18] 14,477,000 14,477,000    
Ending balance [14],[18]     14,477,000  
Investment, Identifier [Axis]: PetVet Care Centers, LLC, First lien senior secured delayed draw term loan        
Schedule of Investments [Line Items]        
Funded Commitment   0 0  
Total unfunded commitments   14,114,000 14,114,000  
Fair Value   (459,000) [27] (7,000) [19]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [19] (7,000) (7,000)    
Ending balance   (459,000) [27] (7,000) [19]  
Investment, Identifier [Axis]: PetVet Care Centers, LLC, First lien senior secured loan        
Schedule of Investments [Line Items]        
Fair Value   102,573,000 [11],[31] 107,072,000 [14],[18]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[18] 107,072,000 107,072,000    
Ending balance   102,573,000 [11],[31] 107,072,000 [14],[18]  
Investment, Identifier [Axis]: PetVet Care Centers, LLC, First lien senior secured revolving loan        
Schedule of Investments [Line Items]        
Funded Commitment   0 0  
Total unfunded commitments   14,812,000 14,812,000  
Fair Value   (630,000) [27] (156,000) [19]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [19] (156,000) (156,000)    
Ending balance   (630,000) [27] (156,000) [19]  
Investment, Identifier [Axis]: Peter C. Foy & Associates Insurance Services, LLC (dba PCF Insurance Services), First lien senior secured delayed draw term loan        
Schedule of Investments [Line Items]        
Fair Value [11],[30]   27,003,000    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Ending balance [11],[30]   27,003,000    
Investment, Identifier [Axis]: Peter C. Foy & Associates Insurance Services, LLC (dba PCF Insurance Services), First lien senior secured loan        
Schedule of Investments [Line Items]        
Fair Value   81,618,000 [11],[31] 109,466,000 [14],[18]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[18] 109,466,000 109,466,000    
Ending balance   81,618,000 [11],[31] 109,466,000 [14],[18]  
Investment, Identifier [Axis]: Peter C. Foy & Associates Insurance Services, LLC (dba PCF Insurance Services), First lien senior secured revolving loan        
Schedule of Investments [Line Items]        
Funded Commitment   0 0  
Total unfunded commitments   6,161,000 6,161,000  
Fair Value   0 [27] (15,000) [19]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [19] (15,000) (15,000)    
Ending balance   0 [27] (15,000) [19]  
Investment, Identifier [Axis]: Phantom Purchaser, Inc., First lien senior secured loan        
Schedule of Investments [Line Items]        
Fair Value [11],[30]   29,038,000    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Ending balance [11],[30]   29,038,000    
Investment, Identifier [Axis]: Phantom Purchaser, Inc., First lien senior secured revolving loan        
Schedule of Investments [Line Items]        
Funded Commitment   0    
Total unfunded commitments   3,742,000    
Fair Value [27]   (28,000)    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Ending balance [27]   (28,000)    
Investment, Identifier [Axis]: Phoenix Newco, Inc. (dba Parexel), Second lien senior secured loan        
Schedule of Investments [Line Items]        
Fair Value [14],[18]     190,000,000  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[18] 190,000,000 190,000,000    
Ending balance [14],[18]     190,000,000  
Investment, Identifier [Axis]: Physician Partners, LLC, First lien senior secured loan        
Schedule of Investments [Line Items]        
Fair Value [11],[30]   6,467,000    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Ending balance [11],[30]   6,467,000    
Investment, Identifier [Axis]: Picard Holdco, Inc., Series A Preferred Stock        
Schedule of Investments [Line Items]        
Fair Value [14],[15],[29]     24,611,000  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[15],[29] 24,611,000 24,611,000    
Ending balance [14],[15],[29]     24,611,000  
Investment, Identifier [Axis]: Ping Identity Holding Corp., First lien senior secured loan        
Schedule of Investments [Line Items]        
Fair Value   904,000 [11],[30] 905,000 [14],[18]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[18] 905,000 905,000    
Ending balance   904,000 [11],[30] 905,000 [14],[18]  
Investment, Identifier [Axis]: Ping Identity Holding Corp., First lien senior secured revolving loan        
Schedule of Investments [Line Items]        
Funded Commitment   0 0  
Total unfunded commitments   91,000 91,000  
Fair Value   0 [27] 0 [19]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [19] 0 0    
Ending balance   0 [27] 0 [19]  
Investment, Identifier [Axis]: Plasma Buyer LLC (dba PathGroup), First lien senior secured delayed draw term loan        
Schedule of Investments [Line Items]        
Funded Commitment     0  
Total unfunded commitments     176,000  
Fair Value   20,000 [11],[25],[30] (2,000) [19]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [19] (2,000) (2,000)    
Ending balance   20,000 [11],[25],[30] (2,000) [19]  
Investment, Identifier [Axis]: Plasma Buyer LLC (dba PathGroup), First lien senior secured delayed draw term loan 1        
Schedule of Investments [Line Items]        
Funded Commitment   20,000    
Total unfunded commitments   5,000    
Fair Value [27]   0    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Ending balance [27]   0    
Investment, Identifier [Axis]: Plasma Buyer LLC (dba PathGroup), First lien senior secured loan        
Schedule of Investments [Line Items]        
Fair Value   657,000 [11],[30] 659,000 [14],[15]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[15] 659,000 659,000    
Ending balance   657,000 [11],[30] 659,000 [14],[15]  
Investment, Identifier [Axis]: Plasma Buyer LLC (dba PathGroup), First lien senior secured revolving loan        
Schedule of Investments [Line Items]        
Fair Value   41,000 [11],[25],[30] 24,000 [14],[15],[17]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[15],[17] 24,000 24,000    
Ending balance   41,000 [11],[25],[30] 24,000 [14],[15],[17]  
Investment, Identifier [Axis]: Plasma Buyer LLC (dba PathGroup), First lien senior secured revolving loan 1        
Schedule of Investments [Line Items]        
Funded Commitment   42,000 25,000  
Total unfunded commitments   33,000 50,000  
Fair Value   0 [27] 0 [19]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [19] 0 0    
Ending balance   0 [27] 0 [19]  
Investment, Identifier [Axis]: Pluralsight, LLC        
Schedule of Investments [Line Items]        
Fair Value   55,282,000 0  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance 0 0    
Gross Additions [9]   55,282,000    
Gross Reductions [10]   0    
Net Change in Unrealized Gains (Losses)   0    
Ending balance   55,282,000 0  
Interest income   1,528,000    
Dividend income   0    
Other income   26,000    
Investment, Identifier [Axis]: Pluralsight, LLC, First lien senior secured delayed draw term loan        
Schedule of Investments [Line Items]        
Funded Commitment   0    
Total unfunded commitments   7,887,000    
Fair Value [27]   0    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Ending balance [27]   0    
Investment, Identifier [Axis]: Pluralsight, LLC, First lien senior secured loan        
Schedule of Investments [Line Items]        
Fair Value [14],[15],[17]     100,860,000  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[15],[17] 100,860,000 100,860,000    
Ending balance [14],[15],[17]     100,860,000  
Investment, Identifier [Axis]: Pluralsight, LLC, First lien senior secured loan 1        
Schedule of Investments [Line Items]        
Fair Value [11],[25],[30]   19,001,000    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Ending balance [11],[25],[30]   19,001,000    
Investment, Identifier [Axis]: Pluralsight, LLC, First lien senior secured loan 2        
Schedule of Investments [Line Items]        
Fair Value [11],[30]   19,539,000    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Ending balance [11],[30]   19,539,000    
Investment, Identifier [Axis]: Pluralsight, LLC, First lien senior secured revolving loan        
Schedule of Investments [Line Items]        
Funded Commitment   0 4,845,000  
Total unfunded commitments   3,155,000 1,390,000  
Fair Value   0 [27] 0 [19]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [19] 0 0    
Ending balance   0 [27] 0 [19]  
Investment, Identifier [Axis]: Pregis Topco LLC, Second lien senior secured loan        
Schedule of Investments [Line Items]        
Fair Value [14],[18]     160,000,000  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[18] 160,000,000 160,000,000    
Ending balance [14],[18]     160,000,000  
Investment, Identifier [Axis]: Premier Imaging, LLC (dba LucidHealth), First lien senior secured loan        
Schedule of Investments [Line Items]        
Fair Value   44,130,000 [11],[25],[30] 41,322,000 [14],[15]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[15] 41,322,000 41,322,000    
Ending balance   44,130,000 [11],[25],[30] 41,322,000 [14],[15]  
Investment, Identifier [Axis]: Premise Health Holding Corp., First lien senior secured loan        
Schedule of Investments [Line Items]        
Fair Value [11],[30]   47,198,000    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Ending balance [11],[30]   47,198,000    
Investment, Identifier [Axis]: Premise Health Holding Corp., First lien senior secured revolving loan        
Schedule of Investments [Line Items]        
Funded Commitment   0    
Total unfunded commitments   5,526,000    
Fair Value [27]   (14,000)    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Ending balance [27]   (14,000)    
Investment, Identifier [Axis]: Project Alpine Co-Invest Fund, LP, LP Interest        
Schedule of Investments [Line Items]        
Fair Value   13,132,000 [1],[11],[22],[26] 11,817,000 [14],[16],[28],[29]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[16],[28],[29] 11,817,000 11,817,000    
Ending balance   13,132,000 [1],[11],[22],[26] 11,817,000 [14],[16],[28],[29]  
Investment, Identifier [Axis]: Project Hotel California Co-Invest Fund, L.P., LP Interest        
Schedule of Investments [Line Items]        
Fair Value   3,092,000 [1],[11],[22],[26] 3,045,000 [14],[16],[28],[29]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[16],[28],[29] 3,045,000 3,045,000    
Ending balance   3,092,000 [1],[11],[22],[26] 3,045,000 [14],[16],[28],[29]  
Investment, Identifier [Axis]: Project Power Buyer, LLC (dba PEC-Veriforce), First lien senior secured loan        
Schedule of Investments [Line Items]        
Fair Value [14],[15]     43,955,000  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[15] 43,955,000 43,955,000    
Ending balance [14],[15]     43,955,000  
Investment, Identifier [Axis]: Project Power Buyer, LLC (dba PEC-Veriforce), First lien senior secured revolving loan        
Schedule of Investments [Line Items]        
Funded Commitment     0  
Total unfunded commitments     3,188,000  
Fair Value [19]     (16,000)  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [19] (16,000) (16,000)    
Ending balance [19]     (16,000)  
Investment, Identifier [Axis]: Proofpoint, Inc., Second lien senior secured loan        
Schedule of Investments [Line Items]        
Fair Value [14],[18],[34]     19,747,000  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[18],[34] 19,747,000 19,747,000    
Ending balance [14],[18],[34]     19,747,000  
Investment, Identifier [Axis]: Pye-Barker Fire & Safety, LLC, First lien senior secured delayed draw term loan        
Schedule of Investments [Line Items]        
Funded Commitment   32,870,000    
Total unfunded commitments   59,384,000    
Fair Value [27]   0    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Ending balance [27]   0    
Investment, Identifier [Axis]: Pye-Barker Fire & Safety, LLC, First lien senior secured loan        
Schedule of Investments [Line Items]        
Fair Value [11],[25],[30]   133,521,000    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Ending balance [11],[25],[30]   133,521,000    
Investment, Identifier [Axis]: Pye-Barker Fire & Safety, LLC, First lien senior secured revolving loan        
Schedule of Investments [Line Items]        
Fair Value [11],[25],[30]   2,386,000    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Ending balance [11],[25],[30]   2,386,000    
Investment, Identifier [Axis]: Pye-Barker Fire & Safety, LLC, First lien senior secured revolving loan 1        
Schedule of Investments [Line Items]        
Funded Commitment   2,435,000    
Total unfunded commitments   17,045,000    
Fair Value [27]   0    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Ending balance [27]   0    
Investment, Identifier [Axis]: QAD, Inc., First lien senior secured loan        
Schedule of Investments [Line Items]        
Fair Value   26,384,000 [11],[31] 25,715,000 [14],[18]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[18] 25,715,000 25,715,000    
Ending balance   26,384,000 [11],[31] 25,715,000 [14],[18]  
Investment, Identifier [Axis]: QAD, Inc., First lien senior secured revolving loan        
Schedule of Investments [Line Items]        
Funded Commitment   0 0  
Total unfunded commitments   3,429,000 3,429,000  
Fair Value   (9,000) [27] (51,000) [19]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [19] (51,000) (51,000)    
Ending balance   (9,000) [27] (51,000) [19]  
Investment, Identifier [Axis]: Quva Pharma, Inc., First lien senior secured loan        
Schedule of Investments [Line Items]        
Fair Value   51,447,000 [11],[25],[50] 38,807,000 [14],[18]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[18] 38,807,000 38,807,000    
Ending balance   51,447,000 [11],[25],[50] 38,807,000 [14],[18]  
Investment, Identifier [Axis]: Quva Pharma, Inc., First lien senior secured revolving loan        
Schedule of Investments [Line Items]        
Funded Commitment     0  
Total unfunded commitments     4,000,000  
Fair Value   3,320,000 [11],[25],[50] (30,000) [19]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [19] (30,000) (30,000)    
Ending balance   3,320,000 [11],[25],[50] (30,000) [19]  
Investment, Identifier [Axis]: Quva Pharma, Inc., First lien senior secured revolving loan 1        
Schedule of Investments [Line Items]        
Funded Commitment   3,360,000    
Total unfunded commitments   640,000    
Fair Value [27]   0    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Ending balance [27]   0    
Investment, Identifier [Axis]: REALPAGE, INC., Second lien senior secured loan        
Schedule of Investments [Line Items]        
Fair Value [14],[18],[34]     34,414,000  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[18],[34] 34,414,000 34,414,000    
Ending balance [14],[18],[34]     34,414,000  
Investment, Identifier [Axis]: RL Datix Holdings (USA), Inc., First lien senior secured GBP term loan        
Schedule of Investments [Line Items]        
Fair Value [11],[38]   24,663,000    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Ending balance [11],[38]   24,663,000    
Investment, Identifier [Axis]: RL Datix Holdings (USA), Inc., First lien senior secured delayed draw term loan        
Schedule of Investments [Line Items]        
Funded Commitment   0    
Total unfunded commitments   9,639,000    
Fair Value [27]   0    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Ending balance [27]   0    
Investment, Identifier [Axis]: RL Datix Holdings (USA), Inc., First lien senior secured loan        
Schedule of Investments [Line Items]        
Fair Value [11],[50]   42,523,000    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Ending balance [11],[50]   42,523,000    
Investment, Identifier [Axis]: RL Datix Holdings (USA), Inc., First lien senior secured revolving loan        
Schedule of Investments [Line Items]        
Fair Value [11],[25],[38]   1,024,000    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Ending balance [11],[25],[38]   1,024,000    
Investment, Identifier [Axis]: RL Datix Holdings (USA), Inc., First lien senior secured revolving loan 1        
Schedule of Investments [Line Items]        
Funded Commitment   1,067,000    
Total unfunded commitments   7,374,000    
Fair Value [27]   0    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Ending balance [27]   0    
Investment, Identifier [Axis]: Recipe Acquisition Corp. (dba Roland Corporation), Second lien senior secured loan        
Schedule of Investments [Line Items]        
Fair Value [15]     32,000,000  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [15] 32,000,000 32,000,000    
Ending balance [15]     32,000,000  
Investment, Identifier [Axis]: Relativity ODA LLC, First lien senior secured loan        
Schedule of Investments [Line Items]        
Fair Value   76,429,000 [11],[31] 85,834,000 [14],[18]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[18] 85,834,000 85,834,000    
Ending balance   76,429,000 [11],[31] 85,834,000 [14],[18]  
Investment, Identifier [Axis]: Relativity ODA LLC, First lien senior secured revolving loan        
Schedule of Investments [Line Items]        
Funded Commitment   0 0  
Total unfunded commitments   6,546,000 7,333,000  
Fair Value   (16,000) [27] 0 [19]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [19] 0 0    
Ending balance   (16,000) [27] 0 [19]  
Investment, Identifier [Axis]: Rhea Acquisition Holdings, LP, Series A-2 Units        
Schedule of Investments [Line Items]        
Fair Value   144,000 [1],[11],[26] 161,000 [14],[28],[29]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[28],[29] 161,000 161,000    
Ending balance   144,000 [1],[11],[26] 161,000 [14],[28],[29]  
Investment, Identifier [Axis]: Rhea Parent, Inc., First lien senior secured loan        
Schedule of Investments [Line Items]        
Fair Value   33,509,000 [11],[30] 758,000 [14],[15]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[15] 758,000 758,000    
Ending balance   33,509,000 [11],[30] 758,000 [14],[15]  
Investment, Identifier [Axis]: Rhea Parent, Inc., First lien senior secured revolving loan        
Schedule of Investments [Line Items]        
Funded Commitment   0    
Total unfunded commitments   5,786,000    
Fair Value [27]   (58,000)    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Ending balance [27]   (58,000)    
Investment, Identifier [Axis]: Rocket BidCo, Inc. (dba Recochem), First lien senior secured loan        
Schedule of Investments [Line Items]        
Fair Value [11],[22],[30]   195,525,000    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Ending balance [11],[22],[30]   195,525,000    
Investment, Identifier [Axis]: Romulus Intermediate Holdings 1 Inc. (dba PetVet Care Centers), Series A Preferred Stock        
Schedule of Investments [Line Items]        
Fair Value   13,092,000 [11],[21],[26] 11,939,000 [14],[24],[29]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[24],[29] 11,939,000 11,939,000    
Ending balance   13,092,000 [11],[21],[26] 11,939,000 [14],[24],[29]  
Investment, Identifier [Axis]: Rushmore Investment III LLC (dba Winland Foods), First lien senior secured loan        
Schedule of Investments [Line Items]        
Fair Value   274,119,000 [11],[30] 146,939,000 [14],[18]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[18] 146,939,000 146,939,000    
Ending balance   274,119,000 [11],[30] 146,939,000 [14],[18]  
Investment, Identifier [Axis]: STS PARENT, LLC (dba STS Aviation Group), First lien senior secured delayed draw term loan        
Schedule of Investments [Line Items]        
Funded Commitment   0    
Total unfunded commitments   26,375,000    
Fair Value [27]   (66,000)    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Ending balance [27]   (66,000)    
Investment, Identifier [Axis]: STS PARENT, LLC (dba STS Aviation Group), First lien senior secured loan        
Schedule of Investments [Line Items]        
Fair Value [11],[31]   94,475,000    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Ending balance [11],[31]   94,475,000    
Investment, Identifier [Axis]: STS PARENT, LLC (dba STS Aviation Group), First lien senior secured revolving loan        
Schedule of Investments [Line Items]        
Fair Value [11],[25],[31]   4,827,000    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Ending balance [11],[25],[31]   4,827,000    
Investment, Identifier [Axis]: STS PARENT, LLC (dba STS Aviation Group), First lien senior secured revolving loan 1        
Schedule of Investments [Line Items]        
Funded Commitment   4,879,000    
Total unfunded commitments   5,671,000    
Fair Value [27]   0    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Ending balance [27]   0    
Investment, Identifier [Axis]: SWK BUYER, Inc. (dba Stonewall Kitchen), First lien senior secured loan        
Schedule of Investments [Line Items]        
Fair Value   715,000 [11],[30] 715,000 [14],[15]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[15] 715,000 715,000    
Ending balance   715,000 [11],[30] 715,000 [14],[15]  
Investment, Identifier [Axis]: SWK BUYER, Inc. (dba Stonewall Kitchen), First lien senior secured revolving loan        
Schedule of Investments [Line Items]        
Funded Commitment   0 0  
Total unfunded commitments   70,000 70,000  
Fair Value   (2,000) [27] (3,000) [19]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [19] (3,000) (3,000)    
Ending balance   (2,000) [27] (3,000) [19]  
Investment, Identifier [Axis]: Safety Products/JHC Acquisition Corp. (dba Justrite Safety Group), First lien senior secured loan        
Schedule of Investments [Line Items]        
Fair Value [14],[18]     13,262,000  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[18] 13,262,000 13,262,000    
Ending balance [14],[18]     13,262,000  
Investment, Identifier [Axis]: SailPoint Technologies Holdings, Inc., First lien senior secured loan        
Schedule of Investments [Line Items]        
Fair Value   29,853,000 [11],[30] 45,298,000 [14],[18]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[18] 45,298,000 45,298,000    
Ending balance   29,853,000 [11],[30] 45,298,000 [14],[18]  
Investment, Identifier [Axis]: SailPoint Technologies Holdings, Inc., First lien senior secured revolving loan        
Schedule of Investments [Line Items]        
Funded Commitment   0 0  
Total unfunded commitments   4,358,000 4,358,000  
Fair Value   0 [27] (33,000) [19]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [19] (33,000) (33,000)    
Ending balance   0 [27] (33,000) [19]  
Investment, Identifier [Axis]: Salinger Bidco Inc. (dba Surgical Information Systems), First lien senior secured delayed draw term loan        
Schedule of Investments [Line Items]        
Funded Commitment   0    
Total unfunded commitments   3,023,000    
Fair Value [27]   0    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Ending balance [27]   0    
Investment, Identifier [Axis]: Salinger Bidco Inc. (dba Surgical Information Systems), First lien senior secured loan        
Schedule of Investments [Line Items]        
Fair Value [11],[31]   31,164,000    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Ending balance [11],[31]   31,164,000    
Investment, Identifier [Axis]: Salinger Bidco Inc. (dba Surgical Information Systems), First lien senior secured revolving loan        
Schedule of Investments [Line Items]        
Funded Commitment   0    
Total unfunded commitments   3,023,000    
Fair Value [27]   (8,000)    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Ending balance [27]   (8,000)    
Investment, Identifier [Axis]: Sara Lee Frozen Bakery, LLC (fka KSLB Holdings, LLC), First lien senior secured loan        
Schedule of Investments [Line Items]        
Fair Value   45,921,000 [11],[25],[30] 44,237,000 [14],[15],[17]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[15],[17] 44,237,000 44,237,000    
Ending balance   45,921,000 [11],[25],[30] 44,237,000 [14],[15],[17]  
Investment, Identifier [Axis]: Sara Lee Frozen Bakery, LLC (fka KSLB Holdings, LLC), First lien senior secured revolving loan        
Schedule of Investments [Line Items]        
Funded Commitment   3,804,000 3,120,000  
Total unfunded commitments   5,196,000 5,880,000  
Fair Value   0 [27] 0 [19]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [19] 0 0    
Ending balance   0 [27] 0 [19]  
Investment, Identifier [Axis]: Securonix, Inc., First lien senior secured loan        
Schedule of Investments [Line Items]        
Fair Value   735,000 [11],[30] 794,000 [14],[15]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[15] 794,000 794,000    
Ending balance   735,000 [11],[30] 794,000 [14],[15]  
Investment, Identifier [Axis]: Securonix, Inc., First lien senior secured revolving loan        
Schedule of Investments [Line Items]        
Funded Commitment     0  
Total unfunded commitments     153,000  
Fair Value   (17,000) [11],[25],[30] (10,000) [19]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [19] (10,000) (10,000)    
Ending balance   (17,000) [11],[25],[30] (10,000) [19]  
Investment, Identifier [Axis]: Securonix, Inc., First lien senior secured revolving loan 1        
Schedule of Investments [Line Items]        
Funded Commitment   3,000    
Total unfunded commitments   149,000    
Fair Value [27]   0    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Ending balance [27]   0    
Investment, Identifier [Axis]: Sensor Technology Topco, Inc. (dba Humanetics), First lien senior secured EUR delayed draw term loan        
Schedule of Investments [Line Items]        
Fair Value [11],[25],[39]   12,351,000    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Ending balance [11],[25],[39]   12,351,000    
Investment, Identifier [Axis]: Sensor Technology Topco, Inc. (dba Humanetics), First lien senior secured EUR delayed draw term loan 1        
Schedule of Investments [Line Items]        
Funded Commitment   47,000    
Total unfunded commitments   230,000    
Fair Value [27]   0    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Ending balance [27]   0    
Investment, Identifier [Axis]: Sensor Technology Topco, Inc. (dba Humanetics), First lien senior secured EUR term loan        
Schedule of Investments [Line Items]        
Fair Value [14],[41]     12,783,000  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[41] 12,783,000 12,783,000    
Ending balance [14],[41]     12,783,000  
Investment, Identifier [Axis]: Sensor Technology Topco, Inc. (dba Humanetics), First lien senior secured delayed draw term loan        
Schedule of Investments [Line Items]        
Funded Commitment   218,000    
Total unfunded commitments   1,101,000    
Fair Value [27]   0    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Ending balance [27]   0    
Investment, Identifier [Axis]: Sensor Technology Topco, Inc. (dba Humanetics), First lien senior secured loan        
Schedule of Investments [Line Items]        
Fair Value   66,008,000 [11],[25],[30] 64,200,000 [14],[15]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[15] 64,200,000 64,200,000    
Ending balance   66,008,000 [11],[25],[30] 64,200,000 [14],[15]  
Investment, Identifier [Axis]: Sensor Technology Topco, Inc. (dba Humanetics), First lien senior secured revolving loan        
Schedule of Investments [Line Items]        
Fair Value   3,691,000 [11],[25],[31] 3,157,000 [14],[15],[17]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[15],[17] 3,157,000 3,157,000    
Ending balance   3,691,000 [11],[25],[31] 3,157,000 [14],[15],[17]  
Investment, Identifier [Axis]: Sensor Technology Topco, Inc. (dba Humanetics), First lien senior secured revolving loan 1        
Schedule of Investments [Line Items]        
Funded Commitment   3,675,000 3,171,000  
Total unfunded commitments   2,001,000 2,506,000  
Fair Value   0 [27] 0 [19]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [19] 0 0    
Ending balance   0 [27] 0 [19]  
Investment, Identifier [Axis]: Severin Acquisition, LLC (dba PowerSchool), First lien senior secured delayed draw term loan        
Schedule of Investments [Line Items]        
Funded Commitment   0    
Total unfunded commitments   157,000    
Fair Value [27]   (1,000)    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Ending balance [27]   (1,000)    
Investment, Identifier [Axis]: Severin Acquisition, LLC (dba PowerSchool), First lien senior secured loan        
Schedule of Investments [Line Items]        
Fair Value [11],[31]   745,000    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Ending balance [11],[31]   745,000    
Investment, Identifier [Axis]: Severin Acquisition, LLC (dba PowerSchool), First lien senior secured revolving loan        
Schedule of Investments [Line Items]        
Funded Commitment   0    
Total unfunded commitments   94,000    
Fair Value [27]   (1,000)    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Ending balance [27]   (1,000)    
Investment, Identifier [Axis]: Shearer's Foods, LLC, Second lien senior secured loan        
Schedule of Investments [Line Items]        
Fair Value [14],[18]     86,400,000  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[18] 86,400,000 86,400,000    
Ending balance [14],[18]     86,400,000  
Investment, Identifier [Axis]: SimpliSafe Holding Corporation, First lien senior secured delayed draw term loan        
Schedule of Investments [Line Items]        
Funded Commitment     205,000  
Total unfunded commitments     566,000  
Fair Value [19]     0  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [19] 0 0    
Ending balance [19]     0  
Investment, Identifier [Axis]: SimpliSafe Holding Corporation, First lien senior secured loan        
Schedule of Investments [Line Items]        
Fair Value   6,785,000 [11],[25],[31] 6,222,000 [14],[17],[18]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[17],[18] 6,222,000 6,222,000    
Ending balance   6,785,000 [11],[25],[31] 6,222,000 [14],[17],[18]  
Investment, Identifier [Axis]: Simplicity Financial Marketing Group Holdings, Inc., First lien senior secured delayed draw term loan        
Schedule of Investments [Line Items]        
Funded Commitment   0    
Total unfunded commitments   8,238,000    
Fair Value [27]   (41,000)    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Ending balance [27]   (41,000)    
Investment, Identifier [Axis]: Simplicity Financial Marketing Group Holdings, Inc., First lien senior secured loan        
Schedule of Investments [Line Items]        
Fair Value [11],[30]   30,584,000    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Ending balance [11],[30]   30,584,000    
Investment, Identifier [Axis]: Simplicity Financial Marketing Group Holdings, Inc., First lien senior secured revolving loan        
Schedule of Investments [Line Items]        
Funded Commitment   0    
Total unfunded commitments   4,119,000    
Fair Value [27]   (41,000)    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Ending balance [27]   (41,000)    
Investment, Identifier [Axis]: Sitecore Holding III A/S, First lien senior secured EUR term loan        
Schedule of Investments [Line Items]        
Fair Value   25,889,000 [11],[39] 25,753,000 [14],[35]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[35] 25,753,000 25,753,000    
Ending balance   25,889,000 [11],[39] 25,753,000 [14],[35]  
Investment, Identifier [Axis]: Sitecore Holding III A/S, First lien senior secured loan        
Schedule of Investments [Line Items]        
Fair Value   4,290,000 [11],[30] 3,968,000 [14],[37]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[37] 3,968,000 3,968,000    
Ending balance   4,290,000 [11],[30] 3,968,000 [14],[37]  
Investment, Identifier [Axis]: Sitecore USA, Inc., First lien senior secured loan        
Schedule of Investments [Line Items]        
Fair Value   25,865,000 [11],[30] 23,923,000 [14],[37]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[37] 23,923,000 23,923,000    
Ending balance   25,865,000 [11],[30] 23,923,000 [14],[37]  
Investment, Identifier [Axis]: Smarsh Inc., First lien senior secured delayed draw term loan        
Schedule of Investments [Line Items]        
Funded Commitment   95,000 95,000  
Total unfunded commitments   95,000 95,000  
Fair Value   0 [27] 0 [19]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [19] 0 0    
Ending balance   0 [27] 0 [19]  
Investment, Identifier [Axis]: Smarsh Inc., First lien senior secured loan        
Schedule of Investments [Line Items]        
Fair Value   857,000 [11],[25],[30] 855,000 [14],[15],[17]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[15],[17] 855,000 855,000    
Ending balance   857,000 [11],[25],[30] 855,000 [14],[15],[17]  
Investment, Identifier [Axis]: Smarsh Inc., First lien senior secured revolving loan        
Schedule of Investments [Line Items]        
Funded Commitment     0  
Total unfunded commitments     8,000  
Fair Value   3,000 [11],[25],[31] 0 [19]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [19] 0 0    
Ending balance   3,000 [11],[25],[31] 0 [19]  
Investment, Identifier [Axis]: Smarsh Inc., First lien senior secured revolving loan 1        
Schedule of Investments [Line Items]        
Funded Commitment   3,000    
Total unfunded commitments   5,000    
Fair Value [27]   0    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Ending balance [27]   0    
Investment, Identifier [Axis]: Soliant Lower Intermediate, LLC (dba Soliant), First lien senior secured revolving loan        
Schedule of Investments [Line Items]        
Funded Commitment   0    
Total unfunded commitments   2,222,000    
Fair Value [27]   (22,000)    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Ending balance [27]   (22,000)    
Investment, Identifier [Axis]: Sonny's Enterprises, LLC, First lien senior secured delayed draw term loan        
Schedule of Investments [Line Items]        
Funded Commitment     427,000  
Total unfunded commitments     573,000  
Fair Value   1,876,000 [11],[25],[30] 0 [19]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [19] 0 0    
Ending balance   1,876,000 [11],[25],[30] 0 [19]  
Investment, Identifier [Axis]: Sonny's Enterprises, LLC, First lien senior secured delayed draw term loan 1        
Schedule of Investments [Line Items]        
Funded Commitment   1,885,000    
Total unfunded commitments   21,736,000    
Fair Value [27]   0    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Ending balance [27]   0    
Investment, Identifier [Axis]: Sonny's Enterprises, LLC, First lien senior secured loan        
Schedule of Investments [Line Items]        
Fair Value   235,395,000 [11],[25],[30] 227,431,000 [14],[15],[17]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[15],[17] 227,431,000 227,431,000    
Ending balance   235,395,000 [11],[25],[30] 227,431,000 [14],[15],[17]  
Investment, Identifier [Axis]: Sonny's Enterprises, LLC, First lien senior secured revolving loan        
Schedule of Investments [Line Items]        
Funded Commitment   4,744,000 0  
Total unfunded commitments   14,232,000 17,969,000  
Fair Value   4,649,000 [11],[25],[30] (45,000) [19]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [19] (45,000) (45,000)    
Ending balance   4,649,000 [11],[25],[30] (45,000) [19]  
Investment, Identifier [Axis]: Sonny's Enterprises, LLC, First lien senior secured revolving loan 1        
Schedule of Investments [Line Items]        
Fair Value [27]   0    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Ending balance [27]   0    
Investment, Identifier [Axis]: Space Exploration Technologies Corp., Class A Common Stock        
Schedule of Investments [Line Items]        
Fair Value   8,337,000 [1],[11],[26] 4,289,000 [14],[28],[29]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[28],[29] 4,289,000 4,289,000    
Ending balance   8,337,000 [1],[11],[26] 4,289,000 [14],[28],[29]  
Investment, Identifier [Axis]: Space Exploration Technologies Corp., Class C Common Stock        
Schedule of Investments [Line Items]        
Fair Value   1,674,000 [1],[11],[26] 862,000 [14],[28],[29]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[28],[29] 862,000 862,000    
Ending balance   1,674,000 [1],[11],[26] 862,000 [14],[28],[29]  
Investment, Identifier [Axis]: Spaceship Purchaser, Inc. (dba Squarespace), First lien senior secured delayed draw term loan 1        
Schedule of Investments [Line Items]        
Funded Commitment   0    
Total unfunded commitments   209,000    
Fair Value [27]   0    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Ending balance [27]   0    
Investment, Identifier [Axis]: Spaceship Purchaser, Inc. (dba Squarespace), First lien senior secured delayed draw term loan 2        
Schedule of Investments [Line Items]        
Funded Commitment   0    
Total unfunded commitments   501,000    
Fair Value [27]   (1,000)    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Ending balance [27]   (1,000)    
Investment, Identifier [Axis]: Spaceship Purchaser, Inc. (dba Squarespace), First lien senior secured loan        
Schedule of Investments [Line Items]        
Fair Value [11],[30]   3,488,000    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Ending balance [11],[30]   3,488,000    
Investment, Identifier [Axis]: Spaceship Purchaser, Inc. (dba Squarespace), First lien senior secured revolving loan        
Schedule of Investments [Line Items]        
Funded Commitment   0    
Total unfunded commitments   417,000    
Fair Value [27]   (2,000)    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Ending balance [27]   (2,000)    
Investment, Identifier [Axis]: Spotless Brands, LLC, First lien senior secured loan        
Schedule of Investments [Line Items]        
Fair Value   47,393,000 [11],[25],[50] 47,759,000 [14],[15]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[15] 47,759,000 47,759,000    
Ending balance   47,393,000 [11],[25],[50] 47,759,000 [14],[15]  
Investment, Identifier [Axis]: Spotless Brands, LLC, First lien senior secured revolving loan        
Schedule of Investments [Line Items]        
Funded Commitment   0    
Total unfunded commitments   1,305,000    
Fair Value   (3,000) [27] 272,000 [14],[17],[18]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[17],[18] 272,000 272,000    
Ending balance   (3,000) [27] 272,000 [14],[17],[18]  
Investment, Identifier [Axis]: Spotless Brands, LLC, First lien senior secured revolving loan 1        
Schedule of Investments [Line Items]        
Funded Commitment     282,000  
Total unfunded commitments     1,023,000  
Fair Value [19]     0  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [19] 0 0    
Ending balance [19]     0  
Investment, Identifier [Axis]: Summit Acquisition Inc. (dba K2 Insurance Services), First lien senior secured delayed draw term loan        
Schedule of Investments [Line Items]        
Funded Commitment     0  
Total unfunded commitments     178,000  
Fair Value [19]     (1,000)  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [19] (1,000) (1,000)    
Ending balance [19]     (1,000)  
Investment, Identifier [Axis]: Summit Acquisition Inc. (dba K2 Insurance Services), First lien senior secured loan        
Schedule of Investments [Line Items]        
Fair Value [14],[15]     715,000  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[15] 715,000 715,000    
Ending balance [14],[15]     715,000  
Investment, Identifier [Axis]: Summit Acquisition Inc. (dba K2 Insurance Services), First lien senior secured revolving loan        
Schedule of Investments [Line Items]        
Funded Commitment     0  
Total unfunded commitments     89,000  
Fair Value [19]     (2,000)  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [19] (2,000) (2,000)    
Ending balance [19]     (2,000)  
Investment, Identifier [Axis]: Sunshine Software Holdings, Inc. (dba Cornerstone OnDemand), Series A Preferred Stock        
Schedule of Investments [Line Items]        
Fair Value [14],[24],[29]     40,933,000  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[24],[29] 40,933,000 40,933,000    
Ending balance [14],[24],[29]     40,933,000  
Investment, Identifier [Axis]: Sunshine Software Holdings, Inc. (dba Cornerstone OnDemand, Inc.), Series A Preferred Stock        
Schedule of Investments [Line Items]        
Fair Value [11],[21],[26]   42,272,000    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Ending balance [11],[21],[26]   42,272,000    
Investment, Identifier [Axis]: Swipe Acquisition Corporation (dba PLI)        
Schedule of Investments [Line Items]        
Fair Value   200,472,000 160,036,000 161,680,000
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance 160,036,000 160,036,000 161,680,000  
Gross Additions 296,000 47,004,000 [12]    
Gross Reductions (1,780,000) (1,336,000) [13]    
Net Change in Unrealized Gains (Losses) (160,000) (5,232,000)    
Ending balance   200,472,000 160,036,000 161,680,000
Interest income 8,692,000 10,322,000    
Dividend income 3,559,000 2,046,000    
Other income 891,000 612,000    
Investment, Identifier [Axis]: Swipe Acquisition Corporation (dba PLI), First lien senior secured delayed draw term loan        
Schedule of Investments [Line Items]        
Funded Commitment     14,288,000  
Total unfunded commitments     6,228,000  
Fair Value [19]     0  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [19] 0 0    
Ending balance [19]     0  
Investment, Identifier [Axis]: Swipe Acquisition Corporation (dba PLI), First lien senior secured loan        
Schedule of Investments [Line Items]        
Fair Value [14],[17],[23],[37]     62,279,000  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[17],[23],[37] 62,279,000 62,279,000    
Ending balance [14],[17],[23],[37]     62,279,000  
Investment, Identifier [Axis]: Swipe Acquisition Corporation (dba PLI), First lien senior secured loan 1        
Schedule of Investments [Line Items]        
Fair Value [11],[25],[31]   67,268,000    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Ending balance [11],[25],[31]   67,268,000    
Investment, Identifier [Axis]: Swipe Acquisition Corporation (dba PLI), First lien senior secured loan 2        
Schedule of Investments [Line Items]        
Fair Value [11],[31]   5,261,000    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Ending balance [11],[31]   5,261,000    
Investment, Identifier [Axis]: Swipe Acquisition Corporation (dba PLI), First lien senior secured loan 3        
Schedule of Investments [Line Items]        
Fair Value [11],[25],[31]   35,238,000    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Ending balance [11],[25],[31]   35,238,000    
Investment, Identifier [Axis]: Swipe Acquisition Corporation (dba PLI), First lien senior secured revolving loan        
Schedule of Investments [Line Items]        
Funded Commitment   6,229,000    
Total unfunded commitments   7,119,000    
Fair Value [27]   0    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Ending balance [27]   0    
Investment, Identifier [Axis]: Swipe Acquisition Corporation (dba PLI), Letter of Credit        
Schedule of Investments [Line Items]        
Funded Commitment     0  
Total unfunded commitments     7,118,000  
Fair Value [19]     0  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [19] 0 0    
Ending balance [19]     0  
Investment, Identifier [Axis]: TBRS, Inc. (dba TEAM Technologies), First lien senior secured delayed draw term loan        
Schedule of Investments [Line Items]        
Funded Commitment   0    
Total unfunded commitments   7,660,000    
Fair Value [27]   (19,000)    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Ending balance [27]   (19,000)    
Investment, Identifier [Axis]: TBRS, Inc. (dba TEAM Technologies), First lien senior secured loan        
Schedule of Investments [Line Items]        
Fair Value [11],[30]   27,945,000    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Ending balance [11],[30]   27,945,000    
Investment, Identifier [Axis]: TBRS, Inc. (dba TEAM Technologies), First lien senior secured revolving loan        
Schedule of Investments [Line Items]        
Fair Value [11],[25],[30]   234,000    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Ending balance [11],[25],[30]   234,000    
Investment, Identifier [Axis]: TBRS, Inc. (dba TEAM Technologies), First lien senior secured revolving loan 1        
Schedule of Investments [Line Items]        
Funded Commitment   255,000    
Total unfunded commitments   4,000,000    
Fair Value [27]   0    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Ending balance [27]   0    
Investment, Identifier [Axis]: THG Acquisition, LLC (dba Hilb), First lien senior secured delayed draw term loan        
Schedule of Investments [Line Items]        
Funded Commitment   0    
Total unfunded commitments   6,599,000    
Fair Value [27]   (33,000)    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Ending balance [27]   (33,000)    
Investment, Identifier [Axis]: THG Acquisition, LLC (dba Hilb), First lien senior secured loan        
Schedule of Investments [Line Items]        
Fair Value   29,517,000 [11],[25],[31] 73,605,000 [14],[18]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[18] 73,605,000 73,605,000    
Ending balance   29,517,000 [11],[25],[31] 73,605,000 [14],[18]  
Investment, Identifier [Axis]: THG Acquisition, LLC (dba Hilb), First lien senior secured revolving loan        
Schedule of Investments [Line Items]        
Funded Commitment   245,000    
Total unfunded commitments   3,054,000    
Fair Value   0 [27] 1,870,000 [14],[17],[18]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[17],[18] 1,870,000 1,870,000    
Ending balance   0 [27] 1,870,000 [14],[17],[18]  
Investment, Identifier [Axis]: THG Acquisition, LLC (dba Hilb), First lien senior secured revolving loan 1        
Schedule of Investments [Line Items]        
Funded Commitment     1,913,000  
Total unfunded commitments     6,695,000  
Fair Value [19]     0  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [19] 0 0    
Ending balance [19]     0  
Investment, Identifier [Axis]: Tall Tree Foods, Inc., First lien senior secured delayed draw term loan        
Schedule of Investments [Line Items]        
Funded Commitment   3,926,000 4,951,000  
Total unfunded commitments   1,500,000 1,500,000  
Fair Value   0 [27] 0 [19]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [19] 0 0    
Ending balance   0 [27] 0 [19]  
Investment, Identifier [Axis]: Tall Tree Foods, Inc., First lien senior secured loan        
Schedule of Investments [Line Items]        
Fair Value   33,395,000 [25],[30],[47] 59,900,000 [15],[17],[48]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [15],[17],[48] 59,900,000 59,900,000    
Ending balance   33,395,000 [25],[30],[47] 59,900,000 [15],[17],[48]  
Investment, Identifier [Axis]: Tamarack Intermediate, L.L.C. (dba Verisk 3E), First lien senior secured delayed draw term loan        
Schedule of Investments [Line Items]        
Funded Commitment     32,000  
Total unfunded commitments     62,000  
Fair Value [19]     0  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [19] 0 0    
Ending balance [19]     0  
Investment, Identifier [Axis]: Tamarack Intermediate, L.L.C. (dba Verisk 3E), First lien senior secured loan        
Schedule of Investments [Line Items]        
Fair Value   1,009,000 [11],[25],[30] 887,000 [14],[15],[17]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[15],[17] 887,000 887,000    
Ending balance   1,009,000 [11],[25],[30] 887,000 [14],[15],[17]  
Investment, Identifier [Axis]: Tamarack Intermediate, L.L.C. (dba Verisk 3E), First lien senior secured revolving loan        
Schedule of Investments [Line Items]        
Funded Commitment   0 0  
Total unfunded commitments   141,000 141,000  
Fair Value   (1,000) [27] (2,000) [19]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [19] (2,000) (2,000)    
Ending balance   (1,000) [27] (2,000) [19]  
Investment, Identifier [Axis]: Tempo Buyer Corp. (dba Global Claims Services), First lien senior secured loan        
Schedule of Investments [Line Items]        
Fair Value   1,056,000 [11],[30] 1,059,000 [14],[15]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[15] 1,059,000 1,059,000    
Ending balance   1,056,000 [11],[30] 1,059,000 [14],[15]  
Investment, Identifier [Axis]: Tempo Buyer Corp. (dba Global Claims Services), First lien senior secured revolving loan        
Schedule of Investments [Line Items]        
Funded Commitment   0    
Total unfunded commitments   154,000    
Fair Value   0 [27] 48,000 [14],[17],[58]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[17],[58] 48,000 48,000    
Ending balance   0 [27] 48,000 [14],[17],[58]  
Investment, Identifier [Axis]: Tempo Buyer Corp. (dba Global Claims Services), First lien senior secured revolving loan 1        
Schedule of Investments [Line Items]        
Funded Commitment     49,000  
Total unfunded commitments     105,000  
Fair Value [19]     0  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [19] 0 0    
Ending balance [19]     0  
Investment, Identifier [Axis]: The Better Being Co., LLC (fka Nutraceutical International Corporation), First lien senior secured loan        
Schedule of Investments [Line Items]        
Fair Value   208,850,000 [11],[25],[31] 182,709,000 [14],[17],[18]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[17],[18] 182,709,000 182,709,000    
Ending balance   208,850,000 [11],[25],[31] 182,709,000 [14],[17],[18]  
Investment, Identifier [Axis]: The Better Being Co., LLC (fka Nutraceutical International Corporation), First lien senior secured revolving loan 1        
Schedule of Investments [Line Items]        
Funded Commitment   0 8,147,000  
Total unfunded commitments   13,578,000 5,431,000  
Fair Value   0 [27] 0 [19]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [19] 0 0    
Ending balance   0 [27] 0 [19]  
Investment, Identifier [Axis]: The Better Being Co., LLC (fka Nutraceutical International Corporation), First lien senior secured revolving loan 2        
Schedule of Investments [Line Items]        
Funded Commitment   870,000 648,000  
Total unfunded commitments   0 0  
Fair Value   0 [27] 0 [19]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [19] 0 0    
Ending balance   0 [27] 0 [19]  
Investment, Identifier [Axis]: The Shade Store, LLC, First lien senior secured loan        
Schedule of Investments [Line Items]        
Fair Value   38,015,000 [11],[30] 8,575,000 [14],[15]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[15] 8,575,000 8,575,000    
Ending balance   38,015,000 [11],[30] 8,575,000 [14],[15]  
Investment, Identifier [Axis]: The Shade Store, LLC, First lien senior secured revolving loan        
Schedule of Investments [Line Items]        
Fair Value   864,000 [11],[25],[30] 548,000 [14],[15],[17]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[15],[17] 548,000 548,000    
Ending balance   864,000 [11],[25],[30] 548,000 [14],[15],[17]  
Investment, Identifier [Axis]: The Shade Store, LLC, First lien senior secured revolving loan 1        
Schedule of Investments [Line Items]        
Funded Commitment   965,000 582,000  
Total unfunded commitments   3,055,000 327,000  
Fair Value   0 [27] 0 [19]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [19] 0 0    
Ending balance   0 [27] 0 [19]  
Investment, Identifier [Axis]: Thunder Purchaser, Inc. (dba Vector Solutions), First lien senior secured loan        
Schedule of Investments [Line Items]        
Fair Value   68,116,000 [11],[30] 68,301,000 [14],[15]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[15] 68,301,000 68,301,000    
Ending balance   68,116,000 [11],[30] 68,301,000 [14],[15]  
Investment, Identifier [Axis]: Thunder Purchaser, Inc. (dba Vector Solutions), First lien senior secured revolving loan        
Schedule of Investments [Line Items]        
Funded Commitment   0    
Total unfunded commitments   5,483,000    
Fair Value   0 [27] 3,208,000 [14],[15],[17]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[15],[17] 3,208,000 3,208,000    
Ending balance   0 [27] 3,208,000 [14],[15],[17]  
Investment, Identifier [Axis]: Thunder Purchaser, Inc. (dba Vector Solutions), First lien senior secured revolving loan 1        
Schedule of Investments [Line Items]        
Funded Commitment     3,235,000  
Total unfunded commitments     2,248,000  
Fair Value [19]     0  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [19] 0 0    
Ending balance [19]     0  
Investment, Identifier [Axis]: Thunder Topco L.P. (dba Vector Solutions), Common Units        
Schedule of Investments [Line Items]        
Fair Value   4,556,000 [1],[11],[26] 4,250,000 [14],[28],[29]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[28],[29] 4,250,000 4,250,000    
Ending balance   4,556,000 [1],[11],[26] 4,250,000 [14],[28],[29]  
Investment, Identifier [Axis]: Tivity Health, Inc., First lien senior secured loan        
Schedule of Investments [Line Items]        
Fair Value   494,000 [11],[31] 980,000 [14],[15]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[15] 980,000 980,000    
Ending balance   494,000 [11],[31] 980,000 [14],[15]  
Investment, Identifier [Axis]: Total Portfolio Company Commitments        
Schedule of Investments [Line Items]        
Funded Commitment   961,620,000    
Total unfunded commitments   1,439,833,000    
Fair Value [27]   (5,130,000)    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Ending balance [27]   (5,130,000)    
Investment, Identifier [Axis]: Total Portfolio Company Commitments        
Schedule of Investments [Line Items]        
Funded Commitment     699,169,000  
Total unfunded commitments     954,831,000  
Fair Value [19]     (2,978,000)  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [19] (2,978,000) (2,978,000)    
Ending balance [19]     (2,978,000)  
Investment, Identifier [Axis]: Troon Golf, L.L.C., First lien senior secured delayed draw term loan        
Schedule of Investments [Line Items]        
Funded Commitment   3,124,000    
Total unfunded commitments   3,124,000    
Fair Value [27]   0    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Ending balance [27]   0    
Investment, Identifier [Axis]: Troon Golf, L.L.C., First lien senior secured loan        
Schedule of Investments [Line Items]        
Fair Value   43,549,000 [11],[25],[30] 236,515,000 [14],[15]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[15] 236,515,000 236,515,000    
Ending balance   43,549,000 [11],[25],[30] 236,515,000 [14],[15]  
Investment, Identifier [Axis]: Troon Golf, L.L.C., First lien senior secured revolving loan        
Schedule of Investments [Line Items]        
Funded Commitment     0  
Total unfunded commitments     21,622,000  
Fair Value   195,000 [11],[25],[49] (108,000) [19]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [19] (108,000) (108,000)    
Ending balance   195,000 [11],[25],[49] (108,000) [19]  
Investment, Identifier [Axis]: Troon Golf, L.L.C., First lien senior secured revolving loan 1        
Schedule of Investments [Line Items]        
Funded Commitment   195,000    
Total unfunded commitments   2,929,000    
Fair Value [27]   0    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Ending balance [27]   0    
Investment, Identifier [Axis]: Truist Insurance Holdings, LLC, First lien senior secured revolving loan        
Schedule of Investments [Line Items]        
Funded Commitment   0    
Total unfunded commitments   1,755,000    
Fair Value [27]   0    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Ending balance [27]   0    
Investment, Identifier [Axis]: USRP Holdings, Inc. (dba U.S. Retirement and Benefits Partners), First lien senior secured loan        
Schedule of Investments [Line Items]        
Fair Value   37,914,000 [11],[31] 38,115,000 [14],[37]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[37] 38,115,000 38,115,000    
Ending balance   37,914,000 [11],[31] 38,115,000 [14],[37]  
Investment, Identifier [Axis]: USRP Holdings, Inc. (dba U.S. Retirement and Benefits Partners), First lien senior secured revolving loan        
Schedule of Investments [Line Items]        
Funded Commitment   0 0  
Total unfunded commitments   4,239,000 4,239,000  
Fair Value   0 [27] (32,000) [19]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [19] (32,000) (32,000)    
Ending balance   0 [27] (32,000) [19]  
Investment, Identifier [Axis]: Ultimate Baked Goods Midco, LLC, First lien senior secured loan        
Schedule of Investments [Line Items]        
Fair Value [14],[18]     80,413,000  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[18] 80,413,000 80,413,000    
Ending balance [14],[18]     80,413,000  
Investment, Identifier [Axis]: Ultimate Baked Goods Midco, LLC, First lien senior secured revolving loan        
Schedule of Investments [Line Items]        
Funded Commitment     0  
Total unfunded commitments     9,946,000  
Fair Value [19]     0  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [19] 0 0    
Ending balance [19]     0  
Investment, Identifier [Axis]: Unified Women's Healthcare, LP, First lien senior secured delayed draw term loan        
Schedule of Investments [Line Items]        
Funded Commitment     0  
Total unfunded commitments     15,000,000  
Fair Value   8,812,000 [11],[25],[31] 0 [19]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [19] 0 0    
Ending balance   8,812,000 [11],[25],[31] 0 [19]  
Investment, Identifier [Axis]: Unified Women's Healthcare, LP, First lien senior secured delayed draw term loan 1        
Schedule of Investments [Line Items]        
Funded Commitment   8,812,000    
Total unfunded commitments   1,300,000    
Fair Value [27]   0    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Ending balance [27]   0    
Investment, Identifier [Axis]: Unified Women's Healthcare, LP, First lien senior secured loan        
Schedule of Investments [Line Items]        
Fair Value [14],[18]     10,902,000  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[18] 10,902,000 10,902,000    
Ending balance [14],[18]     10,902,000  
Investment, Identifier [Axis]: Unified Women's Healthcare, LP, First lien senior secured loan 1        
Schedule of Investments [Line Items]        
Fair Value [30]   893,000    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Ending balance [30]   893,000    
Investment, Identifier [Axis]: Unified Women's Healthcare, LP, First lien senior secured loan 2        
Schedule of Investments [Line Items]        
Fair Value [11],[30]   24,773,000    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Ending balance [11],[30]   24,773,000    
Investment, Identifier [Axis]: Unified Women's Healthcare, LP, First lien senior secured revolving loan        
Schedule of Investments [Line Items]        
Funded Commitment   0 0  
Total unfunded commitments   88,000 88,000  
Fair Value   0 [27] 0 [19]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [19] 0 0    
Ending balance   0 [27] 0 [19]  
Investment, Identifier [Axis]: VEPF Torreys Aggregator, LLC (dba MINDBODY, Inc.), Series A Preferred Stock        
Schedule of Investments [Line Items]        
Fair Value   26,281,000 [11],[21],[26] 23,806,000 [14],[24],[29]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[24],[29] 23,806,000 23,806,000    
Ending balance   26,281,000 [11],[21],[26] 23,806,000 [14],[24],[29]  
Investment, Identifier [Axis]: Valence Surface Technologies LLC, First lien senior secured loan        
Schedule of Investments [Line Items]        
Fair Value   148,996,000 [11],[25],[30] 130,142,000 [14],[15],[17]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[15],[17] 130,142,000 130,142,000    
Ending balance   148,996,000 [11],[25],[30] 130,142,000 [14],[15],[17]  
Investment, Identifier [Axis]: Valence Surface Technologies LLC, First lien senior secured revolving loan        
Schedule of Investments [Line Items]        
Funded Commitment   11,765,000 11,106,000  
Total unfunded commitments   49,000 49,000  
Fair Value   0 [27] 0 [19]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [19] 0 0    
Ending balance   0 [27] 0 [19]  
Investment, Identifier [Axis]: Velocity HoldCo III Inc. (dba VelocityEHS), First lien senior secured loan        
Schedule of Investments [Line Items]        
Fair Value   21,546,000 [11],[30] 21,769,000 [14],[15]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[15] 21,769,000 21,769,000    
Ending balance   21,546,000 [11],[30] 21,769,000 [14],[15]  
Investment, Identifier [Axis]: Velocity HoldCo III Inc. (dba VelocityEHS), First lien senior secured revolving loan        
Schedule of Investments [Line Items]        
Funded Commitment   0    
Total unfunded commitments   1,340,000    
Fair Value   0 [27] 167,000 [14],[15],[17]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[15],[17] 167,000 167,000    
Ending balance   0 [27] 167,000 [14],[15],[17]  
Investment, Identifier [Axis]: Velocity HoldCo III Inc. (dba VelocityEHS), First lien senior secured revolving loan 1        
Schedule of Investments [Line Items]        
Funded Commitment     167,000  
Total unfunded commitments     1,172,000  
Fair Value [19]     0  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [19] 0 0    
Ending balance [19]     0  
Investment, Identifier [Axis]: Vensure Employer Services, Inc., First lien senior secured delayed draw term loan        
Schedule of Investments [Line Items]        
Funded Commitment   18,000    
Total unfunded commitments   172,000    
Fair Value [27]   0    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Ending balance [27]   0    
Investment, Identifier [Axis]: Vensure Employer Services, Inc., First lien senior secured loan        
Schedule of Investments [Line Items]        
Fair Value [11],[25],[30]   819,000    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Ending balance [11],[25],[30]   819,000    
Investment, Identifier [Axis]: Vermont Aus Pty Ltd, First lien senior secured AUD term loan        
Schedule of Investments [Line Items]        
Fair Value [11],[22],[59]   799,000    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Ending balance [11],[22],[59]   799,000    
Investment, Identifier [Axis]: Vermont Aus Pty Ltd, First lien senior secured loan        
Schedule of Investments [Line Items]        
Fair Value [14],[15],[16]     973,000  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[15],[16] 973,000 973,000    
Ending balance [14],[15],[16]     973,000  
Investment, Identifier [Axis]: Vessco Midco Holdings, LLC, First lien senior secured delayed draw term loan        
Schedule of Investments [Line Items]        
Fair Value [11],[25],[50]   3,292,000    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Ending balance [11],[25],[50]   3,292,000    
Investment, Identifier [Axis]: Vessco Midco Holdings, LLC, First lien senior secured delayed draw term loan 1        
Schedule of Investments [Line Items]        
Funded Commitment   3,309,000    
Total unfunded commitments   9,257,000    
Fair Value [27]   0    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Ending balance [27]   0    
Investment, Identifier [Axis]: Vessco Midco Holdings, LLC, First lien senior secured loan        
Schedule of Investments [Line Items]        
Fair Value [11],[31]   37,508,000    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Ending balance [11],[31]   37,508,000    
Investment, Identifier [Axis]: Vessco Midco Holdings, LLC, First lien senior secured revolving loan        
Schedule of Investments [Line Items]        
Funded Commitment   0    
Total unfunded commitments   4,188,000    
Fair Value [27]   (21,000)    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Ending balance [27]   (21,000)    
Investment, Identifier [Axis]: Vital Bidco AB (dba Vitamin Well), First lien senior secured loan        
Schedule of Investments [Line Items]        
Fair Value [11],[22],[30]   47,173,000    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Ending balance [11],[22],[30]   47,173,000    
Investment, Identifier [Axis]: Vital Bidco AB (dba Vitamin Well), First lien senior secured revolving loan        
Schedule of Investments [Line Items]        
Fair Value [11],[22],[25],[31]   2,580,000    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Ending balance [11],[22],[25],[31]   2,580,000    
Investment, Identifier [Axis]: Vital Bidco AB (dba Vitamin Well), First lien senior secured revolving loan 1        
Schedule of Investments [Line Items]        
Funded Commitment   2,725,000    
Total unfunded commitments   8,446,000    
Fair Value [27]   0    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Ending balance [27]   0    
Investment, Identifier [Axis]: WMC Bidco, Inc. (dba West Monroe), Senior Preferred Stock        
Schedule of Investments [Line Items]        
Fair Value   23,240,000 [11],[21],[26] 20,018,000 [14],[24],[29]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[24],[29] 20,018,000 20,018,000    
Ending balance   23,240,000 [11],[21],[26] 20,018,000 [14],[24],[29]  
Investment, Identifier [Axis]: WP Irving Co-Invest, L.P., Partnership Units        
Schedule of Investments [Line Items]        
Fair Value   1,276,000 [1],[11],[22],[26] 1,258,000 [14],[16],[28],[29]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[16],[28],[29] 1,258,000 1,258,000    
Ending balance   1,276,000 [1],[11],[22],[26] 1,258,000 [14],[16],[28],[29]  
Investment, Identifier [Axis]: WU Holdco, Inc. (dba Weiman Products, LLC), First lien senior secured delayed draw term loan        
Schedule of Investments [Line Items]        
Funded Commitment   34,573,000    
Total unfunded commitments   14,724,000    
Fair Value [27]   0    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Ending balance [27]   0    
Investment, Identifier [Axis]: WU Holdco, Inc. (dba Weiman Products, LLC), First lien senior secured loan        
Schedule of Investments [Line Items]        
Fair Value   241,806,000 [11],[25],[30] 196,261,000 [14],[15]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[15] 196,261,000 196,261,000    
Ending balance   241,806,000 [11],[25],[30] 196,261,000 [14],[15]  
Investment, Identifier [Axis]: WU Holdco, Inc. (dba Weiman Products, LLC), First lien senior secured revolving loan        
Schedule of Investments [Line Items]        
Funded Commitment   8,793,000    
Total unfunded commitments   16,853,000    
Fair Value   0 [27] 9,939,000 [14],[15],[17]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[15],[17] 9,939,000 9,939,000    
Ending balance   0 [27] 9,939,000 [14],[15],[17]  
Investment, Identifier [Axis]: WU Holdco, Inc. (dba Weiman Products, LLC), First lien senior secured revolving loan 1        
Schedule of Investments [Line Items]        
Funded Commitment     10,371,000  
Total unfunded commitments     8,835,000  
Fair Value [19]     0  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [19] 0 0    
Ending balance [19]     0  
Investment, Identifier [Axis]: Walker Edison Furniture Company LLC, First lien senior secured delayed draw term loan        
Schedule of Investments [Line Items]        
Funded Commitment   8,145,000 0  
Total unfunded commitments   1,827,000 7,026,000  
Fair Value   0 [27] (562,000) [19]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [19] (562,000) (562,000)    
Ending balance   0 [27] (562,000) [19]  
Investment, Identifier [Axis]: Walker Edison Furniture Company LLC, First lien senior secured loan        
Schedule of Investments [Line Items]        
Fair Value   5,188,000 [11],[25],[30],[47] 24,993,000 [14],[18],[23],[48]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[18],[23],[48] 24,993,000 24,993,000    
Ending balance   5,188,000 [11],[25],[30],[47] 24,993,000 [14],[18],[23],[48]  
Investment, Identifier [Axis]: Walker Edison Furniture Company LLC, First lien senior secured revolving loan        
Schedule of Investments [Line Items]        
Fair Value   7,223,000 [11],[30],[47] 10,511,000 [14],[18],[23],[48]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[18],[23],[48] 10,511,000 10,511,000    
Ending balance   7,223,000 [11],[30],[47] 10,511,000 [14],[18],[23],[48]  
Investment, Identifier [Axis]: Walker Edison Furniture Company LLC, First lien senior secured revolving loan 1        
Schedule of Investments [Line Items]        
Funded Commitment   11,241,000 11,241,000  
Total unfunded commitments   0 0  
Fair Value   0 [27] 0 [19]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [19] 0 0    
Ending balance   0 [27] 0 [19]  
Investment, Identifier [Axis]: Walker Edison Furniture Company, LLC        
Schedule of Investments [Line Items]        
Fair Value   12,411,000 37,499,000 0
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance 37,499,000 37,499,000 0  
Gross Additions 58,488,000 7,751,000 [12]    
Gross Reductions 0 0 [13]    
Net Change in Unrealized Gains (Losses) (20,989,000) (32,839,000)    
Ending balance   12,411,000 37,499,000 0
Interest income 0 0    
Dividend income 0 0    
Other income 18,000 9,000    
Investment, Identifier [Axis]: Walker Edison Holdco LLC, Common Units        
Schedule of Investments [Line Items]        
Fair Value   0 [1],[11],[26] 2,557,000 [14],[23],[28],[29]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[23],[28],[29] 2,557,000 2,557,000    
Ending balance   0 [1],[11],[26] 2,557,000 [14],[23],[28],[29]  
Investment, Identifier [Axis]: When I Work, Inc., First lien senior secured loan        
Schedule of Investments [Line Items]        
Fair Value   5,776,000 [11],[30] 5,481,000 [14],[15]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[15] 5,481,000 5,481,000    
Ending balance   5,776,000 [11],[30] 5,481,000 [14],[15]  
Investment, Identifier [Axis]: When I Work, Inc., First lien senior secured revolving loan        
Schedule of Investments [Line Items]        
Funded Commitment   0 0  
Total unfunded commitments   925,000 925,000  
Fair Value   (32,000) [27] (16,000) [19]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [19] (16,000) (16,000)    
Ending balance   (32,000) [27] (16,000) [19]  
Investment, Identifier [Axis]: Windows Entities, LLC Units        
Schedule of Investments [Line Items]        
Fair Value   138,628,000 [11],[26] 138,628,000 [14],[29],[60]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[29],[60] 138,628,000 138,628,000    
Ending balance   138,628,000 [11],[26] 138,628,000 [14],[29],[60]  
Investment, Identifier [Axis]: Wingspire Capital Holdings LLC        
Schedule of Investments [Line Items]        
Fair Value   508,887,000 461,062,000 431,531,000
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance 461,062,000 461,062,000 431,531,000  
Gross Additions 68,000,000 94,260,000 [12]    
Gross Reductions (44,000,000) (51,000,000) [13]    
Net Change in Unrealized Gains (Losses) 5,531,000 4,565,000    
Ending balance   508,887,000 461,062,000 $ 431,531,000
Interest income 0 0    
Dividend income 37,000,000 40,000,000    
Other income 0 0    
Investment, Identifier [Axis]: Wingspire Capital Holdings LLC, LLC Interest        
Schedule of Investments [Line Items]        
Fair Value   508,887,000 [25],[26],[43] 461,062,000 [17],[23],[29],[40]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [17],[23],[29],[40] 461,062,000 461,062,000    
Ending balance   508,887,000 [25],[26],[43] 461,062,000 [17],[23],[29],[40]  
Investment, Identifier [Axis]: Wingspire Capital Holdings LLC, LLC Interest 1        
Schedule of Investments [Line Items]        
Funded Commitment     388,145,000  
Total unfunded commitments     61,854,000  
Fair Value [19]     0  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [19] 0 0    
Ending balance [19]     0  
Investment, Identifier [Axis]: Wingspire Capital Holdings LLC, LLC Interest 2        
Schedule of Investments [Line Items]        
Funded Commitment   431,405,000    
Total unfunded commitments   68,595,000    
Fair Value [27]   0    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Ending balance [27]   0    
Investment, Identifier [Axis]: XOMA Corporation, Warrants        
Schedule of Investments [Line Items]        
Fair Value [1],[11],[26]   349,000    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Ending balance [1],[11],[26]   349,000    
Investment, Identifier [Axis]: XRL 1 LLC (dba XOMA), First lien senior secured delayed draw term loan        
Schedule of Investments [Line Items]        
Funded Commitment     0  
Total unfunded commitments     2,500,000  
Fair Value [19]     (56,000)  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [19] (56,000) (56,000)    
Ending balance [19]     (56,000)  
Investment, Identifier [Axis]: XRL 1 LLC (dba XOMA), First lien senior secured loan        
Schedule of Investments [Line Items]        
Fair Value [14],[24]     31,769,000  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[24] 31,769,000 31,769,000    
Ending balance [14],[24]     31,769,000  
Investment, Identifier [Axis]: XRL 1 LLC (dba XOMA), Warrants        
Schedule of Investments [Line Items]        
Fair Value [14],[28],[29]     205,000  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[28],[29] 205,000 205,000    
Ending balance [14],[28],[29]     205,000  
Investment, Identifier [Axis]: Zendesk, Inc., First lien senior secured delayed draw term loan        
Schedule of Investments [Line Items]        
Funded Commitment   0 0  
Total unfunded commitments   17,352,000 17,352,000  
Fair Value   0 [27] (43,000) [19]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [19] (43,000) (43,000)    
Ending balance   0 [27] (43,000) [19]  
Investment, Identifier [Axis]: Zendesk, Inc., First lien senior secured loan        
Schedule of Investments [Line Items]        
Fair Value   71,044,000 [11],[30] 70,327,000 [14],[15]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[15] 70,327,000 70,327,000    
Ending balance   71,044,000 [11],[30] 70,327,000 [14],[15]  
Investment, Identifier [Axis]: Zendesk, Inc., First lien senior secured revolving loan        
Schedule of Investments [Line Items]        
Funded Commitment   0 0  
Total unfunded commitments   7,145,000 7,146,000  
Fair Value   0 [27] (89,000) [19]  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [19] (89,000) (89,000)    
Ending balance   0 [27] (89,000) [19]  
Investment, Identifier [Axis]: Zoro TopCo, Inc. (dba Zendesk, Inc.), Series A Preferred Stock        
Schedule of Investments [Line Items]        
Fair Value [14],[24],[29]     10,463,000  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[24],[29] 10,463,000 10,463,000    
Ending balance [14],[24],[29]     10,463,000  
Investment, Identifier [Axis]: Zoro TopCo, Inc., Series A Preferred Equity        
Schedule of Investments [Line Items]        
Fair Value [11],[26],[30]   12,404,000    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Ending balance [11],[26],[30]   12,404,000    
Investment, Identifier [Axis]: Zoro TopCo, L.P. (dba Zendesk, Inc.), Class A Common Units        
Schedule of Investments [Line Items]        
Fair Value [14],[28],[29]     8,669,000  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Beginning balance [14],[28],[29] $ 8,669,000 8,669,000    
Ending balance [14],[28],[29]     $ 8,669,000  
Investment, Identifier [Axis]: Zoro TopCo, L.P., Class A Common Units        
Schedule of Investments [Line Items]        
Fair Value [1],[11],[26]   8,669,000    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]        
Ending balance [1],[11],[26]   $ 8,669,000    
[1] Non-income producing.
[2] Unless otherwise indicated, all investments are considered Level 3 investments.
[3] Unless otherwise indicated, the Company’s portfolio companies are pledged as collateral supporting the amounts outstanding under the Revolving Credit Facility, SPV Asset Facility and CLOs. See Note 5 “Debt.”
[4] Certain portfolio company investments are subject to contractual restrictions on sales. Refer to footnote 27 for additional information on our restricted securities.
[5] Unless otherwise indicated, loan contains a variable rate structure and may be subject to an interest rate floor. Variable rate loans bear interest at a rate that may be determined by reference to either the Secured Overnight Financing Rate (“SOFR” or “S,” which can include one-, three- or six- month SOFR), Euro Interbank Offered Rate (“EURIBOR”), Great Britain Pound London Interbank Offered Rate (“GBPLIBOR” or “G”, which can include three- or six-month GBPLIBOR), SONIA (“SONIA” or “SA”) or an alternate base rate (which can include the Federal Funds Effective Rate or the Prime Rate), at the borrower’s option, and which reset periodically based on the terms of the loan agreement.
[6] Unless otherwise indicated, all investments are considered Level 3 investments.
[7] Unless otherwise indicated, the Company’s portfolio companies are pledged as collateral supporting the amounts outstanding under the Revolving Credit Facility, SPV Asset Facility and CLOs. See Note 5 “Debt”.
[8] Certain portfolio company investments are subject to contractual restrictions on sales. Refer to footnote 26 for additional information on our restricted securities.
[9] Gross additions may include increases in the cost basis of investments resulting from new investments, amounts related to payment-in-kind (“PIK”) interest capitalized and added to the principal balance of the respective loans, the accretion of discounts, the exchange of one or more existing investments for one or more new investments and the movement at fair value of an existing portfolio company into this controlled affiliated category from a different category.
[10] Gross reductions may include decreases in the cost basis of investments resulting from principal collections related to investment repayments and sales, return of capital, the amortization of premiums and the exchange of one or more existing securities for one or more new securities.
[11] As defined in the 1940 Act, the Company is deemed to be both an “Affiliated Person” and has “Control” of this portfolio company as the Company owns more than 25% of the portfolio company’s outstanding voting securities or has the power to exercise control over management or policies of such portfolio company, including through a management agreement (“controlled affiliate”). The Company’s investment in controlled affiliates for the period ended December 31, 2024, were as follows:
($ in thousands)Fair value
as of December 31, 2023
Gross Additions
(a)
Gross Reductions(b)Net Change in Unrealized Gains (Losses)Fair value
as of December 31, 2024
Interest and PIK IncomeDividend IncomeOther Income
Controlled Affiliates
AAM Series 1.1 Rail and Domestic Intermodal Feeder, LLC(d)$64,839 $7,797 $(733)$3,208 $75,111 $3,930 $— $— 
AAM Series 2.1 Aviation Feeder, LLC(d)78,476 33,466 (40,675)6,413 77,680 6,065 — — 
Blue Owl Credit SLF LLC(c)— 812,719 (519,317)2,074 295,476 — 5,318 — 
Eagle Infrastructure Super LLC111,103 271 (398)825 111,801 11,674 3,465 50 
Fifth Season Investments LLC (fka Chapford SMA Partnership, L.P.)156,794 115,651 (70,093)20,922 223,274 — 23,831 — 
OBDC SLF LLC(c)342,786 122,153 (475,116)10,177 — — 43,878 — 
PS Operating Company LLC (fka QC Supply, LLC)15,809 1,327 (669)(13,551)2,916 (17)— — 
Swipe Acquisition Corporation (dba PLI)160,036 47,004 (1,336)(5,232)200,472 10,322 2,046 612 
Walker Edison Furniture Company, LLC37,499 7,751 — (32,839)12,411 — — 
Wingspire Capital Holdings LLC461,062 94,260 (51,000)4,565 508,887 — 40,000 — 
Total Controlled Affiliates$1,428,404 $1,242,399 $(1,159,337)$(3,438)$1,508,028 $31,974 $118,538 $671 
________________
(a)Gross additions may include increases in the cost basis of investments resulting from new investments, amounts related to payment-in-kind (“PIK”) interest capitalized and added to the principal balance of the respective loans, the accretion of discounts, the exchange of one or more existing investments for one or more new investments and the movement at fair value of an existing portfolio company into this controlled affiliated category from a different category.
(b)Gross reductions may include decreases in the cost basis of investments resulting from principal collections related to investment repayments and sales, return of capital, the amortization of premiums and the exchange of one or more existing securities for one or more new securities.
(c)For further description of the Company's investment in Blue Owl Credit SLF LLC (“Credit SLF”), see Note 4 “Investments.”
(d)In connection with its investment in AAM Series 1.1 Rail and Domestic Intermodal Feeder, LLC and AAM Series 2.1 Aviation Feeder, LLC (collectively, “Amergin Assetco”) the Company made a minority investment in Amergin Asset Management, LLC, which has entered into a Servicing Agreement with Amergin Assetco.
[12] Gross additions may include increases in the cost basis of investments resulting from new investments, amounts related to payment-in-kind (“PIK”) interest capitalized and added to the principal balance of the respective loans, the accretion of discounts, the exchange of one or more existing investments for one or more new investments and the movement at fair value of an existing portfolio company into this controlled affiliated category from a different category.
[13] Gross reductions may include decreases in the cost basis of investments resulting from principal collections related to investment repayments and sales, return of capital, the amortization of premiums and the exchange of one or more existing securities for one or more new securities.
[14] Represents co-investment made with the Company’s affiliates in accordance with the terms of the exemptive relief that the Company received from the U.S. Securities and Exchange Commission. See Note 3 “Agreements and Related Party Transactions.”
[15] The interest rate on these loans is subject to 3 month SOFR, which as of December 31, 2023 was 5.33%.
[16] This portfolio company is not a qualifying asset under Section 55(a) of the Investment Company Act of 1940, as amended (the “1940 Act”). Under the 1940 Act, the Company may not acquire any non-qualifying asset unless, at the time such acquisition is made, qualifying assets represent at least 70% of total assets. As of December 31, 2023, non-qualifying assets represented 11.8% of total assets as calculated in accordance with the regulatory requirements.
[17] Position or portion thereof is a partially unfunded debt or equity commitment. See below for more information on the Company’s commitments. See Note 7 “Commitments and Contingencies”.
CompanyCommitment Type
Commitment Expiration Date
Funded Commitment
Unfunded Commitment
Fair Value(21)
Non-controlled/non-affiliated - delayed draw debt commitments
Allied Benefit Systems Intermediate LLCFirst lien senior secured delayed draw term loan10/2025$— $155 $(1)
AmeriLife Holdings LLCFirst lien senior secured delayed draw term loan9/2024150 30 — 
AmeriLife Holdings LLCFirst lien senior secured delayed draw term loan10/2025— 153 — 
Apex Service Partners, LLCFirst lien senior secured delayed draw term loan10/20251,374 4,807 — 
Arctic Holdco, LLC (dba Novvia Group)First lien senior secured delayed draw term loan12/2024— 7,500 (150)
Associations, Inc.First lien senior secured delayed draw term loan6/202449,653 412 — 
Aurelia Netherlands Midco 2 B.V.First lien senior secured EUR term loan11/2030— 27,804 — 
Aurelia Netherlands Midco 2 B.V.First lien senior secured NOK term loan11/2030— 29,096 — 
Bamboo US BidCo LLCFirst lien senior secured delayed draw term loan3/202553 716 — 
BCPE Osprey Buyer, Inc. (dba PartsSource)First lien senior secured delayed draw term loan10/2025— 25,500 (64)
BradyIFS Holdings, LLC (fka Individual Foodservice Holdings, LLC)First lien senior secured delayed draw term loan10/20253,833 11,801 — 
Coupa Holdings, LLCFirst lien senior secured delayed draw term loan8/2024— 70 (1)
Endries Acquisition, Inc.First lien senior secured delayed draw term loan6/2024— 20,370 (153)
Endries Acquisition, Inc.First lien senior secured delayed draw term loan12/2025— 7,835 (59)
Evolution BuyerCo, Inc. (dba SIAA)First lien senior secured delayed draw term loan12/2025— 23,910 — 
FARADAY BUYER, LLC (dba MacLean Power Systems)First lien senior secured delayed draw term loan11/2025— 11,130 (111)
Forescout Technologies, Inc.First lien senior secured delayed draw term loan7/2024— 48,750 — 
Fullsteam Operations, LLCFirst lien senior secured delayed draw term loan5/2025851 1,961 — 
Fullsteam Operations, LLCFirst lien senior secured delayed draw term loan11/2025— 1,250 (19)
GI Apple Midco LLC (dba Atlas Technical Consultants)First lien senior secured delayed draw term loan4/202517 141 — 
Ideal Image Development, LLCFirst lien senior secured delayed draw term loan2/20241,207 659 — 
Indikami Bidco, LLC (dba IntegriChain)First lien senior secured delayed draw term loan12/2025— 2,218 (14)
Integrity Marketing Acquisition, LLCFirst lien senior secured delayed draw term loan2/20254,087 54,441 — 
Kaseya Inc.First lien senior secured delayed draw term loan6/202470 1,065 — 
KPSKY Acquisition, Inc. (dba BluSky)First lien senior secured delayed draw term loan11/2025290 — 
KRIV Acquisition Inc. (dba Riveron)First lien senior secured delayed draw term loan7/2025— 945 (12)
Mario Purchaser, LLC (dba Len the Plumber)First lien senior secured delayed draw term loan4/20243,143 3,729 — 
Ocala Bidco, Inc.First lien senior secured delayed draw term loan5/2024— 18,988 — 
Pacific BidCo Inc.First lien senior secured delayed draw term loan8/2025— 3,436 — 
CompanyCommitment Type
Commitment Expiration Date
Funded Commitment
Unfunded Commitment
Fair Value(21)
PetVet Care Centers, LLCFirst lien senior secured delayed draw term loan11/2025— 14,114 (7)
Plasma Buyer LLC (dba PathGroup)First lien senior secured delayed draw term loan5/2024— 176 (2)
PPV Intermediate Holdings, LLCFirst lien senior secured delayed draw term loan9/2025— 57 — 
SimpliSafe Holding CorporationFirst lien senior secured delayed draw term loan5/2024205 566 — 
Smarsh Inc.First lien senior secured delayed draw term loan2/202495 95 — 
Sonny's Enterprises, LLCFirst lien senior secured delayed draw term loan11/2024427 573 — 
Summit Acquisition Inc. (dba K2 Insurance Services)First lien senior secured delayed draw term loan11/2024— 178 (1)
Swipe Acquisition Corporation (dba PLI)First lien senior secured delayed draw term loan12/202414,288 6,228 — 
Tall Tree Foods, Inc.First lien senior secured delayed draw term loan3/20244,951 1,500 — 
Tamarack Intermediate, L.L.C. (dba Verisk 3E)First lien senior secured delayed draw term loan10/202532 62 — 
Unified Women's Healthcare, LPFirst lien senior secured delayed draw term loan10/2025— 15,000 — 
XRL 1 LLC (dba XOMA)First lien senior secured delayed draw term loan12/2025— 2,500 (56)
Zendesk, Inc.First lien senior secured delayed draw term loan11/2024— 17,352 (43)
Controlled/affiliated - delayed draw debt commitments
Walker Edison Furniture Company LLCFirst lien senior secured delayed draw term loan3/2027— 7,026 (562)
Non-controlled/non-affiliated - revolving debt commitments
3ES Innovation Inc. (dba Aucerna)First lien senior secured revolving loan5/20252,550 1,343 — 
AmeriLife Holdings LLCFirst lien senior secured revolving loan8/2028— 91 — 
Anaplan, Inc.First lien senior secured revolving loan6/2028— 9,722 — 
Apex Service Partners, LLCFirst lien senior secured revolving loan10/2029165 1,895 — 
Ascend Buyer, LLC (dba PPC Flexible Packaging)First lien senior secured revolving loan9/2027188 377 — 
Associations, Inc.First lien senior secured revolving loan7/202711,633 21,290 — 
Aurelia Netherlands Midco 2 B.V.First lien senior secured EUR revolving loan11/2030— 3,089 — 
Bamboo US BidCo LLCFirst lien senior secured revolving loan10/2029— 1,026 (31)
Bayshore Intermediate #2, L.P. (dba Boomi)First lien senior secured revolving loan10/20271,383 5,531 — 
BCPE Osprey Buyer, Inc. (dba PartsSource)First lien senior secured revolving loan8/20263,688 8,167 — 
BCTO BSI Buyer, Inc. (dba Buildertrend)First lien senior secured revolving loan12/2026— 8,036 — 
Blast Bidco Inc. (dba Bazooka Candy Brands)First lien senior secured revolving loan10/2029— 3,448 (86)
BP Veraison Buyer, LLC (dba Sun World)First lien senior secured revolving loan5/2027— 8,716 — 
BradyIFS Holdings, LLC (fka Individual Foodservice Holdings, LLC)First lien senior secured revolving loan10/2029— 12,026 (126)
Brightway Holdings, LLCFirst lien senior secured revolving loan12/20271,421 1,737 — 
Catalis Intermediate, Inc. (fka GovBrands Intermediate, Inc.)First lien senior secured revolving loan8/2027273 520 — 
Circana Group, L.P. (fka The NPD Group, L.P.)First lien senior secured revolving loan12/2027272 1,238 — 
CivicPlus, LLCFirst lien senior secured revolving loan8/2027917 1,781 — 
Coupa Holdings, LLCFirst lien senior secured revolving loan2/2029— 54 (1)
Crewline Buyer, Inc. (dba New Relic)First lien senior secured revolving loan11/2030— 11,063 (166)
Delinea Buyer, Inc. (f/k/a Centrify)First lien senior secured revolving loan3/2027— 6,817 (34)
Denali BuyerCo, LLC (dba Summit Companies)First lien senior secured revolving loan9/2027— 2,998 (7)
EET Buyer, Inc. (dba e-Emphasys)First lien senior secured revolving loan11/202791 364 — 
Entertainment Benefits Group, LLCFirst lien senior secured revolving loan9/202553 80 — 
Evolution BuyerCo, Inc. (dba SIAA)First lien senior secured revolving loan4/2027— 10,709 (80)
Finastra USA, Inc.First lien senior secured revolving loan9/20292,450 6,808 — 
Forescout Technologies, Inc.First lien senior secured revolving loan8/2026— 5,345 — 
Fortis Solutions Group, LLCFirst lien senior secured revolving loan10/202723 439 — 
Fullsteam Operations, LLCFirst lien senior secured revolving loan11/2029— 500 (15)
Gainsight, Inc.First lien senior secured revolving loan7/20271,711 1,727 — 
Galls, LLCFirst lien senior secured revolving loan1/202411,401 20,967 — 
Gaylord Chemical Company, L.L.C.First lien senior secured revolving loan3/2026— 13,202 (66)
CompanyCommitment Type
Commitment Expiration Date
Funded Commitment
Unfunded Commitment
Fair Value(21)
Gerson Lehrman Group, Inc.First lien senior secured revolving loan12/2024— 21,563 — 
Genesis Acquisition Co. (dba Procare Software)*First lien senior secured revolving loan7/20252,637 — — 
GI Apple Midco LLC (dba Atlas Technical Consultants)First lien senior secured revolving loan4/202962 49 — 
GI Ranger Intermediate, LLC (dba Rectangle Health)First lien senior secured revolving loan10/2027221 147 — 
Global Music Rights, LLCFirst lien senior secured revolving loan8/2027— 667 — 
Granicus, Inc.First lien senior secured revolving loan1/2027248 939 — 
H&F Opportunities LUX III S.À R.L (dba Checkmarx)First lien senior secured revolving loan4/2026— 16,250 — 
Hercules Borrower, LLC (dba The Vincit Group)First lien senior secured revolving loan12/2026— 20,916 (52)
HGH Purchaser, Inc. (dba Horizon Services)First lien senior secured revolving loan11/202516,383 165 — 
Hissho Sushi Merger Sub, LLCFirst lien senior secured revolving loan5/2028— 70 — 
Hyland Software, Inc.First lien senior secured revolving loan9/2029— 2,520 (38)
Ideal Tridon Holdings, Inc.First lien senior secured revolving loan4/2028— 2,561 (58)
Ideal Image Development, LLC*First lien senior secured revolving loan9/20271,829 — — 
IG Investments Holdings, LLC (dba Insight Global)First lien senior secured revolving loan9/2027— 3,974 (30)
Indigo Buyer, Inc. (dba Inovar Packaging Group)First lien senior secured revolving loan5/202840 60 — 
Indikami Bidco, LLC (dba IntegriChain)First lien senior secured revolving loan6/2030— 1,585 (36)
Intelerad Medical Systems Incorporated (fka 11849573 Canada Inc.)*First lien senior secured revolving loan8/20268,135 — — 
Integrity Marketing Acquisition, LLCFirst lien senior secured revolving loan8/2026— 13,533 — 
Interoperability Bidco, Inc. (dba Lyniate)First lien senior secured revolving loan12/20242,212 3,054 — 
Kaseya Inc.First lien senior secured revolving loan6/2029286 849 — 
KRIV Acquisition Inc. (dba Riveron)First lien senior secured revolving loan7/2029— 853 (23)
KWOL Acquisition Inc. (dba Worldwide Clinical Trials)First lien senior secured revolving loan12/20292,512 5,860 — 
Lightbeam Bidco, Inc. (dba Lazer Spot)First lien senior secured revolving loan5/2029— 476 — 
Lignetics Investment Corp.First lien senior secured revolving loan10/20263,922 784 — 
LineStar Integrity Services LLC*First lien senior secured revolving loan2/20269,903 — — 
Litera Bidco LLCFirst lien senior secured revolving loan5/2026— 5,738 — 
Mario Purchaser, LLC (dba Len the Plumber)First lien senior secured revolving loan4/2028414 967 — 
Medline Borrower, LPFirst lien senior secured revolving loan10/2026— 7,190 (72)
MHE Intermediate Holdings, LLC (dba OnPoint Group)First lien senior secured revolving loan7/2027— 15,536 — 
Milan Laser Holdings LLCFirst lien senior secured revolving loan4/2026— 3,007 — 
MINDBODY, Inc.First lien senior secured revolving loan2/2025— 6,071 (30)
Ministry Brands Holdings, LLCFirst lien senior secured revolving loan12/202736 32 — 
National Dentex Labs LLC (fka Barracuda Dental LLC)First lien senior secured revolving loan4/20267,024 2,341 — 
Natural Partners, LLCFirst lien senior secured revolving loan11/2027— 68 — 
Nelipak Holding CompanyFirst lien senior secured EUR revolving loan7/20261,628 5,675 — 
Nelipak Holding CompanyFirst lien senior secured USD revolving loan7/20262,010 5,360 — 
NMI Acquisitionco, Inc. (dba Network Merchants)First lien senior secured revolving loan9/2025— 1,652 (8)
Norvax, LLC (dba GoHealth)First lien senior secured revolving loan9/2024— 12,273 (153)
Notorious Topco, LLC (dba Beauty Industry Group)First lien senior secured revolving loan5/2027638 8,939 — 
OB Hospitalist Group, Inc.First lien senior secured revolving loan9/20275,857 9,291 — 
Ole Smoky Distillery, LLCFirst lien senior secured revolving loan3/2028— 116 (2)
Patriot Acquisition TopCo S.A.R.L (dba Corza Health, Inc.)First lien senior secured revolving loan1/20262,901 10,637 — 
Peter C. Foy & Associates Insurance Services, LLC (dba PCF Insurance Services)First lien senior secured revolving loan11/2027— 6,161 (15)
CompanyCommitment Type
Commitment Expiration Date
Funded Commitment
Unfunded Commitment
Fair Value(21)
PetVet Care Centers, LLCFirst lien senior secured revolving loan11/2029— 14,812 (156)
Ping Identity Holding Corp.First lien senior secured revolving loan10/2028— 91 — 
Plasma Buyer LLC (dba PathGroup)First lien senior secured revolving loan5/202825 50 — 
Pluralsight, LLCFirst lien senior secured revolving loan4/20274,845 1,390 — 
PPV Intermediate Holdings, LLCFirst lien senior secured revolving loan8/2029— 67 (1)
Project Power Buyer, LLC (dba PEC-Veriforce)First lien senior secured revolving loan5/2025— 3,188 (16)
PS Operating Company LLC (fka QC Supply, LLC)First lien senior secured revolving loan12/20263,749 1,217 — 
QAD, Inc.First lien senior secured revolving loan11/2027— 3,429 (51)
Quva Pharma, Inc.First lien senior secured revolving loan4/2026— 4,000 (30)
Relativity ODA LLCFirst lien senior secured revolving loan5/2027— 7,333 — 
SailPoint Technologies Holdings, Inc.First lien senior secured revolving loan8/2028— 4,358 (33)
Sara Lee Frozen Bakery, LLC (fka KSLB Holdings, LLC)First lien senior secured revolving loan7/20253,120 5,880 — 
Securonix, Inc.First lien senior secured revolving loan4/2028— 153 (10)
Sensor Technology Topco, Inc. (dba Humanetics)First lien senior secured revolving loan5/20263,171 2,506 — 
Smarsh Inc.First lien senior secured revolving loan2/2029— — 
Sonny's Enterprises, LLCFirst lien senior secured revolving loan8/2027— 17,969 (45)
Spotless Brands, LLCFirst lien senior secured revolving loan7/2028282 1,023 — 
Summit Acquisition Inc. (dba K2 Insurance Services)First lien senior secured revolving loan5/2029— 89 (2)
SWK BUYER, Inc. (dba Stonewall Kitchen)First lien senior secured revolving loan3/2029— 70 (3)
Tamarack Intermediate, L.L.C. (dba Verisk 3E)First lien senior secured revolving loan3/2028— 141 (2)
Tempo Buyer Corp. (dba Global Claims Services)First lien senior secured revolving loan8/202749 105 — 
The Better Being Co., LLC (fka Nutraceutical International Corporation)First lien senior secured revolving loan9/20268,147 5,431 — 
The Better Being Co., LLC (fka Nutraceutical International Corporation)*First lien senior secured revolving loan9/2026648 — — 
The Shade Store, LLCFirst lien senior secured revolving loan10/2026582 327 — 
THG Acquisition, LLC (dba Hilb)First lien senior secured revolving loan12/20251,913 6,695 — 
Thunder Purchaser, Inc. (dba Vector Solutions)First lien senior secured revolving loan6/20273,235 2,248 — 
Troon Golf, L.L.C.First lien senior secured revolving loan8/2026— 21,622 (108)
Ultimate Baked Goods Midco, LLCFirst lien senior secured revolving loan8/2027— 9,946 — 
Unified Women's Healthcare, LPFirst lien senior secured revolving loan6/2029— 88 — 
USRP Holdings, Inc. (dba U.S. Retirement and Benefits Partners)First lien senior secured revolving loan7/2027— 4,239 (32)
Valence Surface Technologies LLCFirst lien senior secured revolving loan6/202511,106 49 — 
Velocity HoldCo III Inc. (dba VelocityEHS)First lien senior secured revolving loan4/2026167 1,172 — 
When I Work, Inc.First lien senior secured revolving loan11/2027— 925 (16)
WU Holdco, Inc. (dba Weiman Products, LLC)First lien senior secured revolving loan3/202510,371 8,835 — 
Zendesk, Inc.First lien senior secured revolving loan11/2028— 7,146 (89)
Controlled/affiliated - revolving debt commitments
Walker Edison Furniture Company LLC*First lien senior secured revolving loan3/202711,241 — — 
Swipe Acquisition Corporation (dba PLI)Letter of Credit6/2026— 7,118 — 
Controlled/affiliated - equity commitments
AAM Series 1.1 Rail and Domestic Intermodal Feeder, LLCLLC InterestN/A25,310 5,324 — 
AAM Series 2.1 Aviation Feeder, LLCLLC InterestN/A31,506 309 — 
Wingspire Capital Holdings LLCLLC InterestN/A388,145 61,854 — 
Total Portfolio Company Commitments$699,169 $954,831 $(2,978)
*Fully funded
[18] The interest rate on these loans is subject to 1 month SOFR, which as of December 31, 2023 was 5.35%
[19] The negative cost is the result of the capitalized discount being greater than the principal amount outstanding on the loan. The negative fair value is the result of the capitalized discount on the loan.
[20] In connection with its investment in AAM Series 1.1 Rail and Domestic Intermodal Feeder, LLC and AAM Series 2.1 Aviation Feeder, LLC (collectively, “Amergin Assetco”) the Company made a minority investment in Amergin Asset Management, LLC, which has entered into a Servicing Agreement with Amergin Assetco.
[21] Investment contains a fixed-rate structure.
[22] This portfolio company is not a qualifying asset under Section 55(a) of the Investment Company Act of 1940, as amended (the “1940 Act”). Under the 1940 Act, the Company may not acquire any non-qualifying asset unless, at the time such acquisition is made, qualifying assets represent at least 70% of total assets. As of December 31, 2024, non-qualifying assets represented 12.8% of total assets as calculated in accordance with the regulatory requirements.
[23] As defined in the 1940 Act, the Company is deemed to be both an “Affiliated Person” and has “Control” of this portfolio company as the Company owns more than 25% of the portfolio company’s outstanding voting securities or has the power to exercise control over management or policies of such portfolio company, including through a management agreement (“controlled affiliate”). The Company’s investment in controlled affiliates for the period ended December 31, 2023, were as follows:
($ in thousands)Fair value
as of December 31, 2022
Gross Additions
(a)
Gross Reductions(b)Change in Unrealized Gains (Losses)Fair value
as of December 31, 2023
Interest and PIK IncomeDividend IncomeOther Income
Controlled Affiliates
AAM Series 1.1 Rail and Domestic Intermodal Feeder, LLC(d)$— $64,843 $(35)$31 $64,839 $1,899 $— $— 
AAM Series 2.1 Aviation Feeder, LLC(d)1,568 76,910 (1)(1)78,476 617 — — 
Eagle Infrastructure Super LLC— 110,045 (2)1,060 111,103 8,913 — 27 
Fifth Season Investments LLC (fka Chapford SMA Partnership, L.P.)89,680 67,120 — (6)156,794 — 4,963 — 
Blue Owl Capital Corporation Senior Loan Fund LLC(c)288,981 106,751 (72,625)19,679 342,786 — 46,280 — 
PS Operating Company LLC (fka QC Supply, LLC)20,361 546 (166)(4,932)15,809 1,987 — 
Swipe Acquisition Corporation (dba PLI)161,680 296 (1,780)(160)160,036 8,692 3,559 891 
Walker Edison Furniture Company, LLC— 58,488 — (20,989)37,499 — — 18 
Wingspire Capital Holdings LLC431,531 68,000 (44,000)5,531 461,062 — 37,000 — 
Total Controlled Affiliates$993,801 $552,999 $(118,609)$213 $1,428,404 $22,108 $91,802 $942 
________________
(a)Gross additions may include increases in the cost basis of investments resulting from new investments, amounts related to payment-in-kind (“PIK”) interest capitalized and added to the principal balance of the respective loans, the accretion of discounts, the exchange of one or more existing investments for one or more new investments and the movement at fair value of an existing portfolio company into this controlled affiliated category from a different category.
(b)Gross reductions may include decreases in the cost basis of investments resulting from principal collections related to investment repayments and sales, return of capital, the amortization of premiums and the exchange of one or more existing securities for one or more new securities.
(c)For further description of the Company's investment in Blue Owl Capital Corporation Senior Loan Fund, see Note 4 “Investments.”
(d)In connection with its investment in AAM Series 1.1 Rail and Domestic Intermodal Feeder, LLC and AAM Series 2.1 Aviation Feeder, LLC (collectively, “Amergin Assetco”) the Company made a minority investment in Amergin Asset Management, LLC, which has entered into a Servicing Agreement with Amergin Assetco.
[24] Contains a fixed-rate structure.
[25] Position or portion thereof is a partially unfunded debt or equity commitment. See below for more information on the Company’s commitments. See Note 7 “Commitments and Contingencies.”
Portfolio Company
Commitment Type
Commitment Expiration Date
Funded Commitment
Unfunded Commitment
Fair Value(33)
Non-controlled/non-affiliated - delayed draw debt commitments
Aerosmith Bidco 1 Limited (dba Audiotonix)First lien senior secured delayed draw term loan7/2027— 62,563 (49)
Portfolio Company
Commitment Type
Commitment Expiration Date
Funded Commitment
Unfunded Commitment
Fair Value(33)
AI Titan Parent, Inc. (dba Prometheus Group)First lien senior secured delayed draw term loan9/2026— 151 (1)
AlphaSense, Inc.First lien senior secured delayed draw term loan6/2029— 143 (1)
AlphaSense, Inc.First lien senior secured delayed draw term loan12/2025— 141 (1)
AmeriLife Holdings LLCFirst lien senior secured delayed draw term loan6/202688 94 — 
Aptean Acquiror, Inc. (dba Aptean)First lien senior secured delayed draw term loan1/202614 40 — 
Artifact Bidco, Inc. (dba Avetta)First lien senior secured delayed draw term loan7/2027— 2,228 — 
Associations, Inc.First lien senior secured delayed draw term loan7/20284,631 23,118 — 
Baker Tilly Advisory Group, L.P.First lien senior secured delayed draw term loan6/2026— 8,762 — 
Bamboo US BidCo LLCFirst lien senior secured delayed draw term loan11/2026— 1,372 — 
Bamboo US BidCo LLCFirst lien senior secured delayed draw term loan3/2025457 315 — 
BCPE Osprey Buyer, Inc. (dba PartsSource)First lien senior secured delayed draw term loan10/20254,391 21,075 — 
BradyPLUS Holdings, LLC (f/k/a BradyIFS Holdings, LLC)First lien senior secured delayed draw term loan10/2025960 3,503 — 
CHA Vision Holdings, Inc. (fka FR Vision Holdings, Inc.)First lien senior secured delayed draw term loan1/20263,457 4,752 — 
CMG HoldCo, LLC (dba Crete United)First lien senior secured delayed draw term loan10/2026— 123 (1)
CMG HoldCo, LLC (dba Crete United)First lien senior secured delayed draw term loan11/2025175 133 — 
Coupa Holdings, LLCFirst lien senior secured delayed draw term loan8/2025— 70 — 
Cresset Capital Management, LLCFirst lien senior secured delayed draw term loan9/2025— 3,806 — 
Cresset Capital Management, LLCFirst lien senior secured delayed draw term loan6/2026— 2,239 — 
CT Technologies Intermediate Holdings, Inc. (& Smart Holdings Corp.) (dba Datavant)First lien senior secured delayed draw term loan8/2026— 1,533 (4)
DCG ACQUISITION CORP. (dba DuBois Chemical)First lien senior secured delayed draw term loan6/2026— 9,328 — 
Diamond Mezzanine 24 LLC (dba United Risk)*First lien senior secured delayed draw term loan10/2026— 2,850 — 
Dresser Utility Solutions, LLCFirst lien senior secured delayed draw term loan9/2025— 5,131 — 
DuraServ LLCFirst lien senior secured delayed draw term loan6/202613,506 13,722 — 
Endries Acquisition, Inc.First lien senior secured delayed draw term loan12/2025— 7,835 (59)
EOS Finco S.A.R.LFirst lien senior secured delayed draw term loan5/202669 2,489 — 
Essential Services Holding Corporation (dba Turnpoint)First lien senior secured delayed draw term loan6/2026— 3,866 (19)
Evolution BuyerCo, Inc. (dba SIAA)First lien senior secured delayed draw term loan12/20253,945 19,925 — 
Faraday Buyer, LLC (dba MacLean Power Systems)First lien senior secured delayed draw term loan11/2025— 11,130 — 
FR Flow Control CB LLC (dba Trillium Flow Technologies)First lien senior secured delayed draw term loan6/2026— 4,803 — 
Fullsteam Operations, LLCFirst lien senior secured delayed draw term loan8/2025464 4,536 — 
Fullsteam Operations, LLCFirst lien senior secured delayed draw term loan2/2026354 896 — 
Galls, LLCFirst lien senior secured delayed draw term loan3/20263,604 29,174 — 
Galway Borrower LLCFirst lien senior secured delayed draw term loan7/202628 1,526 — 
Gehl Foods, LLCFirst lien senior secured delayed draw term loan12/20252,135 3,203 — 
GI Apple Midco LLC (dba Atlas Technical Consultants)First lien senior secured delayed draw term loan4/202517 141 — 
Indigo Buyer, Inc. (dba Inovar Packaging Group)First lien senior secured delayed draw term loan7/2026— 3,497 — 
Indikami Bidco, LLC (dba IntegriChain)First lien senior secured delayed draw term loan12/2025127 2,092 — 
Integrity Marketing Acquisition, LLCFirst lien senior secured delayed draw term loan8/2026— 6,280 — 
Interoperability Bidco, Inc. (dba Lyniate)First lien senior secured delayed draw term loan6/2026— 4,444 (111)
Kaseya Inc.First lien senior secured delayed draw term loan6/2025221 844 — 
Portfolio Company
Commitment Type
Commitment Expiration Date
Funded Commitment
Unfunded Commitment
Fair Value(33)
KENE Acquisition, Inc. (dba Entrust Solutions Group)First lien senior secured delayed draw term loan2/2026532 4,581 — 
KPSKY Acquisition, Inc. (dba BluSky)First lien senior secured delayed draw term loan11/2025290 — 
Lakefield Acquisition Corp. (dba Lakefield Veterinary Group)First lien senior secured delayed draw term loan9/2026397 — 
Litera Bidco LLCFirst lien senior secured delayed draw term loan11/202616,181 18,279 — 
Litera Bidco LLCFirst lien senior secured delayed draw term loan5/2027— 14,361 (36)
Maple Acquisition, LLC (dba Medicus)First lien senior secured delayed draw term loan5/2026— 12,103 — 
Mario Purchaser, LLC (dba Len the Plumber)First lien senior secured delayed draw term loan10/2025457 4,143 — 
Minotaur Acquisition, Inc. (dba Inspira Financial)First lien senior secured delayed draw term loan5/2026— 24,666 — 
Monotype Imaging Holdings Inc.First lien senior secured delayed draw term loan2/20262,222 7,314 — 
National Dentex Labs LLC (fka Barracuda Dental LLC)First lien senior secured delayed draw term loan4/20264,763 1,073 — 
NELIPAK EUROPEAN HOLDINGS COÖPERATIEF U.A.First lien senior secured EUR delayed draw term loan3/2027(4)14,565 (182)
Nelipak Holding CompanyFirst lien senior secured delayed draw term loan3/2027— 7,680 (96)
Paris US Holdco, Inc. (dba Precinmac)First lien senior secured delayed draw term loan12/2026— 5,581 (28)
Park Place Technologies, LLCFirst lien senior secured delayed draw term loan9/2025— 368 — 
PDI TA Holdings, Inc.First lien senior secured delayed draw term loan2/20261,936 1,531 — 
PerkinElmer U.S. LLCFirst lien senior secured delayed draw term loan5/20262,944 984 — 
PetVet Care Centers, LLCFirst lien senior secured delayed draw term loan11/2025— 14,114 (459)
Plasma Buyer LLC (dba PathGroup)First lien senior secured delayed draw term loan9/202520 — 
Pluralsight, LLCFirst lien senior secured delayed draw term loan8/2029— 7,887 — 
Pye-Barker Fire & Safety, LLCFirst lien senior secured delayed draw term loan5/202632,870 59,384 — 
RL Datix Holdings (USA), Inc.First lien senior secured delayed draw term loan4/2027— 9,639 — 
Salinger Bidco Inc. (dba Surgical Information Systems)First lien senior secured delayed draw term loan8/2026— 3,023 — 
Sensor Technology Topco, Inc. (dba Humanetics)First lien senior secured EUR delayed draw term loan9/202547 230 — 
Sensor Technology Topco, Inc. (dba Humanetics)First lien senior secured delayed draw term loan9/2025218 1,101 — 
Severin Acquisition, LLC (dba PowerSchool)First lien senior secured delayed draw term loan10/2027— 157 (1)
Simplicity Financial Marketing Group Holdings, Inc.First lien senior secured delayed draw term loan12/2026— 8,238 (41)
Smarsh Inc.First lien senior secured delayed draw term loan2/202595 95 — 
Sonny's Enterprises, LLCFirst lien senior secured delayed draw term loan6/20261,885 21,736 — 
Spaceship Purchaser, Inc. (dba Squarespace)First lien senior secured delayed draw term loan10/2026— 209 — 
Spaceship Purchaser, Inc. (dba Squarespace)First lien senior secured delayed draw term loan10/2027— 501 (1)
STS PARENT, LLC (dba STS Aviation Group)First lien senior secured delayed draw term loan10/2026— 26,375 (66)
Tall Tree Foods, Inc.First lien senior secured delayed draw term loan3/20253,926 1,500 — 
TBRS, Inc. (dba TEAM Technologies)First lien senior secured delayed draw term loan11/2026— 7,660 (19)
THG Acquisition, LLC (dba Hilb)First lien senior secured delayed draw term loan10/2026— 6,599 (33)
Troon Golf, L.L.C.First lien senior secured delayed draw term loan9/20263,124 3,124 — 
Unified Women's Healthcare, LPFirst lien senior secured delayed draw term loan3/20268,812 1,300 — 
Vensure Employer Services, Inc.First lien senior secured delayed draw term loan9/203118 172 — 
Vessco Midco Holdings, LLCFirst lien senior secured delayed draw term loan7/20263,309 9,257 — 
WU Holdco, Inc. (dba Weiman Products, LLC)First lien senior secured delayed draw term loan7/202634,573 14,724 — 
Portfolio Company
Commitment Type
Commitment Expiration Date
Funded Commitment
Unfunded Commitment
Fair Value(33)
Zendesk, Inc.First lien senior secured delayed draw term loan11/2025— 17,352 — 
Controlled/affiliated - delayed draw debt commitments
Walker Edison Furniture Company LLCFirst lien senior secured delayed draw term loan3/20278,145 1,827 — 
Non-controlled/non-affiliated - revolving debt commitments
Aerosmith Bidco 1 Limited (dba Audiotonix)First lien senior secured revolving loan7/2030— 26,072 (65)
AI Titan Parent, Inc. (dba Prometheus Group)First lien senior secured revolving loan8/2031— 94 (1)
AmeriLife Holdings LLCFirst lien senior secured revolving loan8/2028— 91 — 
Anaplan, Inc.First lien senior secured revolving loan6/2028— 9,722 — 
Applied Composites Holdings, LLC (fka AC&A Enterprises Holdings, LLC)*First lien senior secured revolving loan1/20253,051 — — 
Aptean Acquiror, Inc. (dba Aptean)First lien senior secured revolving loan1/2031— 73 — 
Artifact Bidco, Inc. (dba Avetta)First lien senior secured revolving loan7/2030— 1,592 (8)
Ascend Buyer, LLC (dba PPC Flexible Packaging)First lien senior secured revolving loan9/2027188 377 — 
Associations, Inc.First lien senior secured revolving loan7/202811,117 11,117 — 
Azurite Intermediate Holdings, Inc. (dba Alteryx, Inc.)First lien senior secured revolving loan3/2031— 1,330 (10)
Baker Tilly Advisory Group, L.P.First lien senior secured revolving loan6/2030— 12,278 (61)
Bamboo US BidCo LLCFirst lien senior secured revolving loan10/2029— 1,026 — 
Bayshore Intermediate #2, L.P. (dba Boomi)First lien senior secured revolving loan10/2027— 6,155 — 
BCPE Osprey Buyer, Inc. (dba PartsSource)First lien senior secured revolving loan8/20267,904 3,952 — 
BCTO BSI Buyer, Inc. (dba Buildertrend)First lien senior secured revolving loan12/2026— 8,036 — 
Blast Bidco Inc. (dba Bazooka Candy Brands)First lien senior secured revolving loan10/2029— 3,448 — 
BP Veraison Buyer, LLC (dba Sun World)First lien senior secured revolving loan5/2029— 18,478 — 
Brightway Holdings, LLCFirst lien senior secured revolving loan12/20271,263 1,895 — 
Broadcast Music, Inc. (fka Otis Merger Sub, Inc.)First lien senior secured revolving loan2/2030— 4,878 (37)
Cadence, Inc.First lien senior secured revolving loan5/20265,270 2,070 — 
Catalis Intermediate, Inc. (fka GovBrands Intermediate, Inc.)First lien senior secured revolving loan8/2027273 520 — 
CHA Vision Holdings, Inc. (fka FR Vision Holdings, Inc.)First lien senior secured revolving loan1/2030— 2,057 — 
CivicPlus, LLCFirst lien senior secured revolving loan8/2027— 2,698 — 
CMG HoldCo, LLC (dba Crete United)First lien senior secured revolving loan5/202818 88 — 
Coupa Holdings, LLCFirst lien senior secured revolving loan2/2029— 54 — 
Creek Parent, Inc. (dba Catalent)First lien senior secured revolving loan12/2031— 12,352 (216)
Cresset Capital Management, LLCFirst lien senior secured revolving loan6/2029— 1,119 — 
Crewline Buyer, Inc. (dba New Relic)First lien senior secured revolving loan11/2030— 11,063 (138)
CT Technologies Intermediate Holdings, Inc. (& Smart Holdings Corp.) (dba Datavant)First lien senior secured revolving loan8/2031— 3,831 (10)
DCG ACQUISITION CORP. (dba DuBois Chemical)First lien senior secured revolving loan6/2031— 9,328 (47)
Delinea Buyer, Inc. (f/k/a Centrify)First lien senior secured revolving loan3/2027— 6,817 — 
Denali BuyerCo, LLC (dba Summit Companies)First lien senior secured revolving loan9/2027— 2,998 — 
Diamond Mezzanine 24 LLC (dba United Risk)First lien senior secured revolving loan10/2030713 — — 
Dresser Utility Solutions, LLCFirst lien senior secured revolving loan3/2029— 7,183 (18)
DuraServ LLCFirst lien senior secured revolving loan6/2030— 13,631 (68)
Portfolio Company
Commitment Type
Commitment Expiration Date
Funded Commitment
Unfunded Commitment
Fair Value(33)
Eagle Family Foods Group LLCFirst lien senior secured revolving loan8/2030— 189 (1)
EET Buyer, Inc. (dba e-Emphasys)First lien senior secured revolving loan11/2027— 455 — 
Essential Services Holding Corporation (dba Turnpoint)First lien senior secured revolving loan6/2030— 2,416 (24)
Evolution BuyerCo, Inc. (dba SIAA)First lien senior secured revolving loan4/2027— 10,709 — 
Fiesta Purchaser, Inc. (dba Shearer's Foods)First lien senior secured revolving loan2/2029— 2,658 (1)
Finastra USA, Inc.First lien senior secured revolving loan9/20295,758 3,500 — 
Forescout Technologies, Inc.First lien senior secured revolving loan5/2030— 11,320 (57)
Fortis Solutions Group, LLCFirst lien senior secured revolving loan10/2027162 300 — 
FR Flow Control CB LLC (dba Trillium Flow Technologies)First lien senior secured revolving loan12/2029— 3,930 (29)
Fullsteam Operations, LLCFirst lien senior secured revolving loan11/2029— 500 — 
Gainsight, Inc.First lien senior secured revolving loan7/20271,875 1,727 — 
Galls, LLCFirst lien senior secured revolving loan3/2030— 13,118 — 
Galway Borrower LLCFirst lien senior secured revolving loan9/202816 179 — 
Gaylord Chemical Company, L.L.C.First lien senior secured revolving loan12/20276,865 6,337 — 
Gerson Lehrman Group, Inc.First lien senior secured revolving loan12/2027— 6,217 (16)
GI Apple Midco LLC (dba Atlas Technical Consultants)First lien senior secured revolving loan4/202943 68 — 
GI Ranger Intermediate, LLC (dba Rectangle Health)First lien senior secured revolving loan10/202743 326 — 
Granicus, Inc.First lien senior secured revolving loan1/2031— 1,096 — 
H&F Opportunities LUX III S.À R.L (dba Checkmarx)First lien senior secured revolving loan4/2026— 16,250 (41)
Hercules Borrower, LLC (dba The Vincit Group)First lien senior secured revolving loan12/2026— 20,916 — 
HGH Purchaser, Inc. (dba Horizon Services)First lien senior secured revolving loan11/2026— 16,548 (869)
Hissho Parent, LLCFirst lien senior secured revolving loan5/2029— 1,452 — 
Hyland Software, Inc.First lien senior secured revolving loan9/2029— 2,520 — 
Icefall Parent, Inc. (dba EngageSmart)First lien senior secured revolving loan1/2030— 2,100 — 
Ideal Tridon Holdings, Inc.First lien senior secured revolving loan4/2028— 2,561 — 
IG Investments Holdings, LLC (dba Insight Global)First lien senior secured revolving loan9/2028— 5,294 — 
Indigo Buyer, Inc. (dba Inovar Packaging Group)First lien senior secured revolving loan5/2028— 100 — 
Indikami Bidco, LLC (dba IntegriChain)First lien senior secured revolving loan6/2030570 1,014 — 
Integrity Marketing Acquisition, LLCFirst lien senior secured revolving loan8/2028— 2,102 — 
Intelerad Medical Systems Incorporated (fka 11849573 Canada Inc.)*First lien senior secured revolving loan8/20268,135 — — 
Interoperability Bidco, Inc. (dba Lyniate)First lien senior secured revolving loan3/2028274 4,992 — 
IRI Group Holdings, Inc. (f/k/a Circana Group, L.P. (f/k/a The NPD Group, L.P.))First lien senior secured revolving loan12/2027302 1,208 — 
JS Parent, Inc. (dba Jama Software)First lien senior secured revolving loan4/2031— 88 — 
KABAFUSION Parent, LLCFirst lien senior secured revolving loan11/2031— 2,778 (28)
Kaseya Inc.First lien senior secured revolving loan6/2029287 850 — 
KENE Acquisition, Inc. (dba Entrust Solutions Group)First lien senior secured revolving loan2/2031— 1,534 (19)
KRIV Acquisition Inc. (dba Riveron)First lien senior secured revolving loan7/2029— 853 — 
KWOL Acquisition Inc. (dba Worldwide Clinical Trials)First lien senior secured revolving loan12/2029— 8,838 — 
Lakefield Acquisition Corp. (dba Lakefield Veterinary Group)First lien senior secured revolving loan9/2029— 67 — 
Portfolio Company
Commitment Type
Commitment Expiration Date
Funded Commitment
Unfunded Commitment
Fair Value(33)
Lightbeam Bidco, Inc. (dba Lazer Spot)First lien senior secured revolving loan5/2029— 476 — 
Lignetics Investment Corp.First lien senior secured revolving loan11/20263,451 1,255 — 
LineStar Integrity Services LLC*First lien senior secured revolving loan2/20269,903 — — 
Litera Bidco LLCFirst lien senior secured revolving loan5/2028— 8,174 (20)
Maple Acquisition, LLC (dba Medicus)First lien senior secured revolving loan5/2030— 9,078 — 
Mario Purchaser, LLC (dba Len the Plumber)First lien senior secured revolving loan4/2028414 967 — 
MHE Intermediate Holdings, LLC (dba OnPoint Group)First lien senior secured revolving loan7/20273,107 12,429 — 
Milan Laser Holdings LLCFirst lien senior secured revolving loan4/2026— 3,007 — 
MINDBODY, Inc.First lien senior secured revolving loan9/2025— 6,071 — 
Ministry Brands Holdings, LLCFirst lien senior secured revolving loan12/2027— 68 (1)
Minotaur Acquisition, Inc. (dba Inspira Financial)First lien senior secured revolving loan6/2030— 15,174 (76)
Monotype Imaging Holdings Inc.First lien senior secured revolving loan2/2030— 14,304 (36)
National Dentex Labs LLC (fka Barracuda Dental LLC)First lien senior secured revolving loan4/20267,071 2,295 — 
Natural Partners, LLCFirst lien senior secured revolving loan11/2027— 159 (1)
NELIPAK EUROPEAN HOLDINGS COÖPERATIEF U.A.First lien senior secured EUR revolving loan3/2031890 1,827 — 
Nelipak Holding CompanyFirst lien senior secured revolving loan3/20312,407 3,324 — 
NMI Acquisitionco, Inc. (dba Network Merchants)First lien senior secured revolving loan9/2028— 1,652 — 
Norvax, LLC (dba GoHealth)First lien senior secured revolving loan6/20252,080 4,056 — 
Notorious Topco, LLC (dba Beauty Industry Group)First lien senior secured revolving loan5/2027— 9,577 (1,054)
OB Hospitalist Group, Inc.First lien senior secured revolving loan9/2027— 15,148 (38)
Ole Smoky Distillery, LLCFirst lien senior secured revolving loan3/2028— 116 (1)
Paris US Holdco, Inc. (dba Precinmac)First lien senior secured revolving loan12/2031— 2,791 (28)
Park Place Technologies, LLCFirst lien senior secured revolving loan3/203079 197 — 
Patriot Acquisition TopCo S.A.R.L (dba Corza Health, Inc.)First lien senior secured revolving loan1/2028— 13,538 — 
PDI TA Holdings, Inc.First lien senior secured revolving loan2/2031— 1,525 (15)
Peter C. Foy & Associates Insurance Services, LLC (dba PCF Insurance Services)First lien senior secured revolving loan11/2027— 6,161 — 
PetVet Care Centers, LLCFirst lien senior secured revolving loan11/2029— 14,812 (630)
Phantom Purchaser, Inc.First lien senior secured revolving loan9/2031— 3,742 (28)
Ping Identity Holding Corp.First lien senior secured revolving loan10/2028— 91 — 
Plasma Buyer LLC (dba PathGroup)First lien senior secured revolving loan5/202842 33 — 
Pluralsight, LLCFirst lien senior secured revolving loan8/2029— 3,155 — 
PPV Intermediate Holdings, LLCFirst lien senior secured revolving loan8/2029— 67 — 
Premise Health Holding Corp.First lien senior secured revolving loan2/2030— 5,526 (14)
PS Operating Company LLC (fka QC Supply, LLC)First lien senior secured revolving loan12/20264,772 659 — 
Pye-Barker Fire & Safety, LLCFirst lien senior secured revolving loan5/20302,435 17,045 — 
QAD, Inc.First lien senior secured revolving loan11/2027— 3,429 (9)
Quva Pharma, Inc.First lien senior secured revolving loan4/20263,360 640 — 
Relativity ODA LLCFirst lien senior secured revolving loan5/2029— 6,546 (16)
Rhea Parent, Inc.First lien senior secured revolving loan12/2030— 5,786 (58)
RL Datix Holdings (USA), Inc.First lien senior secured revolving loan10/20301,067 7,374 — 
SailPoint Technologies Holdings, Inc.First lien senior secured revolving loan8/2028— 4,358 — 
Salinger Bidco Inc. (dba Surgical Information Systems)First lien senior secured revolving loan5/2031— 3,023 (8)
Portfolio Company
Commitment Type
Commitment Expiration Date
Funded Commitment
Unfunded Commitment
Fair Value(33)
Sara Lee Frozen Bakery, LLC (fka KSLB Holdings, LLC)First lien senior secured revolving loan7/20253,804 5,196 — 
Securonix, Inc.First lien senior secured revolving loan4/2028149 — 
Sensor Technology Topco, Inc. (dba Humanetics)First lien senior secured revolving loan5/20283,675 2,001 — 
Severin Acquisition, LLC (dba PowerSchool)First lien senior secured revolving loan10/2031— 94 (1)
Simplicity Financial Marketing Group Holdings, Inc.First lien senior secured revolving loan12/2031— 4,119 (41)
Smarsh Inc.First lien senior secured revolving loan2/2029— 
Soliant Lower Intermediate, LLC (dba Soliant)First lien senior secured revolving loan6/2031— 2,222 (22)
Sonny's Enterprises, LLCFirst lien senior secured revolving loan8/20274,744 14,232 — 
Spaceship Purchaser, Inc. (dba Squarespace)First lien senior secured revolving loan10/2031— 417 (2)
Spotless Brands, LLCFirst lien senior secured revolving loan7/2028— 1,305 (3)
STS PARENT, LLC (dba STS Aviation Group)First lien senior secured revolving loan10/20304,879 5,671 — 
Swipe Acquisition Corporation (dba PLI)First lien senior secured revolving loan11/20276,229 7,119 — 
SWK BUYER, Inc. (dba Stonewall Kitchen)First lien senior secured revolving loan3/2029— 70 (2)
Tamarack Intermediate, L.L.C. (dba Verisk 3E)First lien senior secured revolving loan3/2028— 141 (1)
TBRS, Inc. (dba TEAM Technologies)First lien senior secured revolving loan11/2030255 4,000 — 
Tempo Buyer Corp. (dba Global Claims Services)First lien senior secured revolving loan8/2027— 154 — 
The Better Being Co., LLC (fka Nutraceutical International Corporation)First lien senior secured revolving loan9/2026— 13,578 — 
The Better Being Co., LLC (fka Nutraceutical International Corporation)*First lien senior secured revolving loan9/2026870 — — 
The Shade Store, LLCFirst lien senior secured revolving loan10/2028965 3,055 — 
THG Acquisition, LLC (dba Hilb)First lien senior secured revolving loan10/2031245 3,054 — 
Thunder Purchaser, Inc. (dba Vector Solutions)First lien senior secured revolving loan6/2027— 5,483 — 
Troon Golf, L.L.C.First lien senior secured revolving loan8/2028195 2,929 — 
Truist Insurance Holdings, LLCFirst lien senior secured revolving loan5/2029— 1,755 — 
Unified Women's Healthcare, LPFirst lien senior secured revolving loan6/2029— 88 — 
USRP Holdings, Inc. (dba U.S. Retirement and Benefits Partners)First lien senior secured revolving loan12/2029— 4,239 — 
Valence Surface Technologies LLCFirst lien senior secured revolving loan12/202611,765 49 — 
Velocity HoldCo III Inc. (dba VelocityEHS)First lien senior secured revolving loan4/2026— 1,340 — 
Vessco Midco Holdings, LLCFirst lien senior secured revolving loan7/2031— 4,188 (21)
Vital Bidco AB (dba Vitamin Well)First lien senior secured revolving loan10/20302,725 8,446 — 
When I Work, Inc.First lien senior secured revolving loan11/2027— 925 (32)
WU Holdco, Inc. (dba Weiman Products, LLC)First lien senior secured revolving loan3/20278,793 16,853 — 
Zendesk, Inc.First lien senior secured revolving loan11/2028— 7,145 — 
Non-controlled/affiliated - revolving debt commitments
Ideal Image Development, LLCFirst lien senior secured revolving loan2/20291,463 366 — 
Ideal Image Development, LLC*First lien senior secured revolving loan2/202966 — — 
Non-controlled/affiliated - equity commitments
LSI Financing LLCCommon EquityN/A156,004 3,188 — 
Controlled/affiliated-debt - revolving debt commitments
Walker Edison Furniture Company LLC*First lien senior secured revolving loan3/202711,241 — — 
Portfolio Company
Commitment Type
Commitment Expiration Date
Funded Commitment
Unfunded Commitment
Fair Value(33)
Controlled/affiliated - equity commitments
AAM Series 1.1 Rail and Domestic Intermodal Feeder, LLCLLC InterestN/A26,763 59,032 — 
AAM Series 2.1 Aviation Feeder, LLCLLC InterestN/A25,601 27,444 — 
Wingspire Capital Holdings LLCLLC InterestN/A431,405 68,595 — 
Total Portfolio Company Commitments$961,620 $1,439,833 $(5,130)
*Fully funded
[26] Represents co-investment made with the Company’s affiliates in accordance with the terms of the exemptive relief that the Company received from the U.S. Securities and Exchange Commission. See Note 3 “Agreements and Related Party Transactions.”
[27] The negative cost and fair value results from unamortized fees, which are capitalized to the investment cost.
[28] Investment is non-income producing.
[29] Securities acquired in transactions exempt from registration under the Securities Act of 1933, as amended (the “Securities Act”) and may be deemed to be “restricted securities” under the Securities Act. As of December 31, 2023, the aggregate fair value of these securities is $2.0 billion or 32.9% of the Company’s net assets. The acquisition dates of the restricted securities are as follows:
Portfolio CompanyInvestmentAcquisition Date
AAM Series 1.1 Rail and Domestic Intermodal Feeder, LLC**LLC Interest7/1/2022
AAM Series 2.1 Aviation Feeder, LLC**LLC Interest7/1/2022
Amergin Asset Management, LLCClass A Units7/1/2022
Accelerate topco Holdings, LLCCommon Units9/1/2022
ASP Conair Holdings LPClass A Units5/17/2021
Associations Finance, Inc.Preferred Stock6/10/2022
BCTO WIW Holdings, Inc. (dba When I Work)Class A Common Stock11/2/2021
BEHP Co-Investor II, L.P.LP Interest5/11/2022
Blend Labs, Inc.Warrants7/2/2021
Blue Owl Capital Corporation Senior Loan Fund LLC*LLC Interest6/20/2017
Brooklyn Lender Co-Invest 2, L.P. (dba Boomi)Common Units10/1/2021
CD&R Value Building Partners I, L.P. (dba Belron)LP Interest12/2/2021
Denali Holding, LP (dba Summit Companies)Class A Units9/15/2021
Dodge Construction Network Holdings, LPClass A-2 Common Units2/23/2022
Dodge Construction Network Holdings, LPSeries A Preferred Units2/23/2022
Eagle Infrastructure Super LLC**Common Units3/31/2023
Elliott Alto Co-Investor Aggregator L.P.LP Interest9/27/2022
Evology, LLCClass B Units1/24/2022
Evolution Parent, LP (dba SIAA)LP Interest4/30/2021
Fifth Season Investments LLC (fka Chapford SMA Partnership, L.P.)**Class A Units7/18/2022
Gloves Holdings, LP (dba Protective Industrial Products)LP Interest12/29/2020
GrowthCurve Capital Sunrise Co-Invest LP (dba Brightway)LP Interest12/16/2021
Hercules Buyer, LLC (dba The Vincit Group)Common Units12/15/2020
H-Food Holdings, LLCLLC Interest11/23/2018
Hissho Sushi Holdings, LLCClass A units5/17/2022
Hockey Parent Holdings L.P.Class A Units9/14/2023
Insight CP (Blocker) Holdings, L.P. (dba CivicPlus, LLC)LP Interest6/8/2022
Knockout Intermediate Holdings I Inc. (dba Kaseya)Perpetual Preferred Stock6/23/2022
KOBHG Holdings, L.P. (dba OB Hospitalist)Class A Interests9/27/2021
KPCI Holdings, L.P.Class A Units11/30/2020
KWOL Acquisition Inc. (dba Worldwide Clinical Trials)Class A Interest11/30/2023
LSI Financing 1 DAC**Preferred equity12/14/2022
Maia Aggregator, LPClass A-2 Units2/1/2022
MessageBird Holding B.V.Extended Series C Warrants5/5/2021
Metis HoldCo, Inc. (dba Mavis Tire Express Services)Series A Convertible Preferred Stock5/4/2021
Minerva Holdco, Inc.Series A Preferred Stock2/15/2022
New PLI Holdings, LLC (dba PLI)**Class A Common Units12/23/2020
Patriot Holdings SCSp (dba Corza Health, Inc.)Class B Units1/29/2021
Patriot Holdings SCSp (dba Corza Health, Inc.)Class A Units1/29/2021
PCF Holdco, LLC (dba PCF Insurance Services)Class A Units11/1/2021
PCF Holdco, LLC (dba PCF Insurance Services)Series A Preferred Units2/16/2023
Portfolio CompanyInvestmentAcquisition Date
PCF Holdco, LLC (dba PCF Insurance Services)Class A Unit Warrants2/16/2023
Picard Holdco, LLCSeries A Preferred Stock9/30/2022
Project Alpine Co-Invest Fund, LPLP Interest6/10/2022
Project Hotel California Co-Invest Fund, L.P. LP Interest8/9/2022
PS Op Holdings LLC (fka QC Supply, LLC)**Class A Common Units12/21/2021
Rhea Acquisition Holdings, LPSeries A-2 Units2/18/2022
Romulus Intermediate Holdings 1 Inc. (dba PetVet Care Centers)Series A Preferred Stock11/15/2023
Space Exploration Technologies Corp.Class A Common Stock3/25/2021
Space Exploration Technologies Corp.Class C Common Stock3/25/2021
Sunshine Software Holdings, Inc. (dba Cornerstone OnDemand)Series A Preferred Stock10/14/2021
Thunder Topco L.P. (dba Vector Solutions)Common Units6/30/2021
VEPF Torreys Aggregator, LLC (dba MINDBODY, Inc.)Series A Preferred Stock10/15/2021
 Walker Edison Holdco LLC**Common Units3/1/2023
Windows EntitiesLLC Units1/16/2020
Wingspire Capital Holdings LLC**LLC Interest9/24/2019
WMC Bidco, Inc. (dba West Monroe)Senior Preferred Stock11/9/2021
WP Irving Co-Invest, L.P.Partnership Units5/18/2022
XRL 1 LLC (dba XOMA)Warrants12/15/2023
Zoro TopCo, L.P.Series A Preferred Stock11/22/2022
Zoro TopCo, L.P.Class A Common Units11/22/2022
* Refer to Note 4 “Investments – Blue Owl Capital Corporation Senior Loan Fund LLC,” for further information.
** Refer to Note 3 “Agreements and Related Party Transactions – Controlled/Affiliated Portfolio Companies”.
[30] The interest rate on these loans is subject to 3 month SOFR, which as of December 31, 2024 was 4.31%.
[31] The interest rate on these loans is subject to 1 month SOFR, which as of December 31, 2024 was 4.33%.
[32] Level 2 investment.
[33] The date disclosed represents the commitment period of the unfunded term loan. Upon expiration of the commitment period, the funded portion of the term loan may be subject to a longer maturity date.
[34] Level 2 investment.
[35] The interest rate on this loan is subject to 6 month EURIBOR, which as of December 31, 2023 was 3.86%.
[36] The interest rate on this loan is subject to SONIA, which as of December 31, 2023 was 5.19%.
[37] The interest rate on these loans is subject to 6 month SOFR, which as of December 31, 2023 was 5.16%
[38] The interest rate on this loan is subject to SONIA, which as of December 31, 2024 was 4.70%
[39] The interest rate on this loan is subject to 3 month EURIBOR, which as of December 31, 2024 was 2.71%.
[40] Investment is not pledged as collateral for the credit facilities.
[41] The interest rate on this loan is subject to 3 month EURIBOR, which as of December 31, 2023 was 3.91%.
[42] Level 1 investment.
[43] Investment is not pledged as collateral for the credit facilities.
[44] Investment measured at net asset value (“NAV”).
[45] Investment measured at net asset value (“NAV”).
[46] For further description of the Company's investment in Blue Owl Credit SLF LLC (“Credit SLF”), see Note 4 “Investments.”
[47] Loan was on non-accrual status as of December 31, 2024
[48] Loan was on non-accrual status as of December 31, 2023.
[49] The interest rate on this loan is subject to Prime, which as of December 31, 2024 was 7.50%
[50] The interest rate on these loans is subject to 6 month SOFR, which as of December 31, 2024 was 4.25%.
[51] Securities acquired in transactions exempt from registration under the Securities Act of 1933, as amended (the “Securities Act”) and may be deemed to be “restricted securities” under the Securities Act. As of December 31, 2024, the aggregate fair value of these securities is $2.21 billion or 37.1% of the Company’s net assets. The acquisition dates of the restricted securities are as follows:
Portfolio CompanyInvestmentAcquisition Date
AAM Series 1.1 Rail and Domestic Intermodal Feeder, LLC**LLC Interest7/1/2022
AAM Series 2.1 Aviation Feeder, LLC**LLC Interest7/1/2022
Alphasense, LLCSeries E Preferred Shares6/27/2024
Amergin Asset Management, LLC**Class A Units7/1/2022
Accelerate topco Holdings, LLCCommon Units9/1/2022
ASP Conair Holdings LPClass A Units5/17/2021
BCTO WIW Holdings, Inc. (dba When I Work)Class A Common Stock11/2/2021
BEHP Co-Investor II, L.P.LP Interest5/11/2022
Blend Labs, Inc.Warrants7/2/2021
Blue Owl Credit SLF LLC*LLC Interest8/1/2024
Brooklyn Lender Co-Invest 2, L.P. (dba Boomi)Common Units10/1/2021
CD&R Value Building Partners I, L.P. (dba Belron)LP Interest12/2/2021
Denali Holding, LP (dba Summit Companies)Class A Units9/15/2021
Dodge Construction Network Holdings, LPClass A-2 Common Units2/23/2022
Dodge Construction Network Holdings, LPSeries A Preferred Units2/23/2022
 Eagle Infrastructure Super LLCCommon Units3/31/2023
Elliott Alto Co-Investor Aggregator L.P.LP Interest9/27/2022
Portfolio CompanyInvestmentAcquisition Date
Evology, LLCClass B Units1/24/2022
Evolution Parent, LP (dba SIAA)LP Interest4/30/2021
Fifth Season Investments LLC (fka Chapford SMA Partnership, L.P.)**Class A Units7/18/2022
Gloves Holdings, LP (dba Protective Industrial Products)LP Interest12/29/2020
GrowthCurve Capital Sunrise Co-Invest LP (dba Brightway)LP Interest12/16/2021
Hercules Buyer, LLC (dba The Vincit Group)Common Units12/15/2020
HFS Matterhorn Topco, Inc.Common Units11/23/2018
Hissho Sushi Holdings, LLCClass A units5/17/2022
Hockey Parent Holdings L.P.Class A Units9/14/2023
Ideal Topco, L.P.Class A-1 Preferred Units2/20/2024
Ideal Topco, L.P.Class A-2 Common Units2/20/2024
Insight CP (Blocker) Holdings, L.P. (dba CivicPlus, LLC)LP Interest6/8/2022
Knockout Intermediate Holdings I Inc. (dba Kaseya)Perpetual Preferred Stock6/23/2022
KOBHG Holdings, L.P. (dba OB Hospitalist)Class A Interests9/27/2021
KPCI Holdings, L.P.Class A Units11/30/2020
KWOL Acquisition Inc. (dba Worldwide Clinical Trials)Class A Interest11/30/2023
LSI Financing 1 DAC**Preferred equity12/14/2022
LSI Financing LLC**Common Equity11/25/2024
Maia Aggregator, LPClass A-2 Units2/1/2022
MessageBird Holding B.V.Extended Series C Warrants5/5/2021
Metis HoldCo, Inc. (dba Mavis Tire Express Services)Series A Convertible Preferred Stock5/4/2021
Minerva Holdco, Inc.Series A Preferred Stock2/15/2022
New PLI Holdings, LLC (dba PLI)Class A Common Units12/23/2020
Patriot Holdings SCSp (dba Corza Health, Inc.)Class B Units1/29/2021
Patriot Holdings SCSp (dba Corza Health, Inc.)Class A Units1/29/2021
PCF Holdco, LLC (dba PCF Insurance Services)Class A Units11/1/2021
PCF Holdco, LLC (dba PCF Insurance Services)Series A Preferred Units2/16/2023
PCF Holdco, LLC (dba PCF Insurance Services)Class A Unit Warrants2/16/2023
Paradigmatic Holdco LLC (dba Pluralsight, LLC)Common stock8/22/2024
Project Alpine Co-Invest Fund, LPLP Interest6/10/2022
Project Hotel California Co-Invest Fund, L.P. LP Interest8/9/2022
PS Op Holdings LLC (fka QC Supply, LLC)Class A Common Units12/21/2021
Rhea Acquisition Holdings, LPSeries A-2 Units2/18/2022
Romulus Intermediate Holdings 1 Inc. (dba PetVet Care Centers)Series A Preferred Stock11/15/2023
Space Exploration Technologies Corp.Class A Common Stock3/25/2021
Space Exploration Technologies Corp.Class C Common Stock3/25/2021
Sunshine Software Holdings, Inc. (dba Cornerstone OnDemand)Series A Preferred Stock10/14/2021
Thunder Topco L.P. (dba Vector Solutions)Common Units6/30/2021
VEPF Torreys Aggregator, LLC (dba MINDBODY, Inc.)Series A Preferred Stock10/15/2021
 Walker Edison Holdco LLCCommon Units3/1/2023
Windows EntitiesLLC Units1/16/2020
Wingspire Capital Holdings LLC**LLC Interest9/24/2019
WMC Bidco, Inc. (dba West Monroe)Senior Preferred Stock11/9/2021
WP Irving Co-Invest, L.P.Partnership Units5/18/2022
XOMA Corporation
Warrants12/15/2023
Zoro TopCo, L.P.Series A Preferred Stock11/22/2022
Zoro TopCo, L.P.Class A Common Units11/22/2022
* Refer to Note 4 “Investments – Credit SLF LLC” for further information.
** Refer to Note 3 “Agreements and Related Party Transactions – Controlled/Affiliated Portfolio Companies.”
[52] Level 1 investment.
[53] We invest in this portfolio company through underlying blocker entities Hercules Blocker 1 LLC, Hercules Blocker 2 LLC, Hercules Blocker 3 LLC, Hercules Blocker 4 LLC, and Hercules Blocker 5 LLC.
[54] The interest rate on these loans is subject to 12 month SOFR, which as of December 31, 2024 was 4.18%.
[55] As defined in the 1940 Act, the Company is deemed to be an “affiliated person” of this portfolio company as the Company owns more than 5% but less than 25% of the portfolio company's voting securities or has the power to exercise control over management or policies of such portfolio company, including through a management agreement (“non-controlled affiliate”). Transactions related to investments in non-controlled affiliates for the period ended December 31, 2023 were as follows:
($ in thousands)Fair value
as of December 31, 2022
Gross Additions
(a)
Gross Reductions(b)Change in Unrealized Gains (Losses)Fair value
as of December 31, 2023
Interest IncomeDividend IncomeOther Income
LSI Financing 1 DAC$6,175 $15,045 $(2,265)$1,033 $19,988 $— $252 $— 
Total Non-Controlled Affiliates$6,175 $15,045 $(2,265)$1,033 $19,988 $ $252 $ 
________________
(a)Gross additions may include increases in the cost basis of investments resulting from new investments, amounts related to payment-in-kind (“PIK”) interest capitalized and added to the principal balance of the respective loans, the accretion of discounts, the exchange of one or more existing investments for one or more new investments and the movement at fair value of an existing portfolio company into this controlled affiliated category from a different category.
(b)Gross reductions may include decreases in the cost basis of investments resulting from principal collections related to investment repayments and sales, return of capital, the amortization of premiums and the exchange of one or more existing securities for one or more new securities.
[56] The interest rate on this loan is subject to 1 month EURIBOR, which as of December 31, 2024 was 2.85%.
[57] The interest rate on this loan is subject to 1 month EURIBOR, which as of December 31, 2023 was 3.85%.
[58] The interest rate on these loans is subject to Prime, which as of December 31, 2023 was 8.50%.
[59] The interest rate on this loan is subject to 3 month BBSY, which as of December 31, 2024 was 4.42%
[60] Investment represents multiple underlying investments in related entities under common management. These underlying investments are on identical terms and include Midwest Custom Windows, LLC with a fair value of $24.1 million, Greater Toronto Custom Windows, Corp. with a fair value of $10.0 million, Garden State Custom Windows, LLC with a fair value of $33.4 million, Long Island Custom Windows, LLC with a fair value of $28.9 million, Jemico, LLC with a fair value of $23.1 million, Atlanta Custom Windows, LLC with a fair value of $11.5 million and Fairchester Custom Windows with a fair value of $7.6 million as of December 31, 2023. Greater Toronto Custom Windows, Corp. is considered a non-qualifying asset.