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Condensed Consolidated Schedule of Investments (Parenthetical) - USD ($)
3 Months Ended 12 Months Ended
Mar. 31, 2025
Dec. 31, 2024
Schedule of Investments [Line Items]    
Percentage of portfolio above floor rate 89.50% 89.40%
Fair Value as % of Net Assets 205.60% 215.50%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance $ 13,092,518,000  
Ending balance $ 12,834,206,000 $ 13,092,518,000
Non-controlled/non-affiliated investments    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 205.14% [1],[2] 214.95% [3],[4]
Unfunded commitments $ 1,779,617,000 $ 1,707,094,000
Fair Value (6,561,000) (7,253,000)
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4] 13,063,171,000  
Ending balance $ 12,804,785,000 [1],[2] $ 13,063,171,000 [3],[4]
Non-controlled/affiliated investments    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.47% [1],[2] 0.48% [3],[4]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4] $ 29,347,000  
Ending balance 29,421,000 [1],[2] $ 29,347,000 [3],[4]
Non-controlled/affiliated investments | Blackstone Donegal Holdings LP    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance 6,403,000 5,790,000
Gross Additions 0 0
Gross Reductions 0 0
Net Change in Unrealized Gains (Losses) (7,000) 613,000
Net Realized Gain (Loss) 0 0
Ending balance 6,396,000 6,403,000
Dividend and Interest Income 0 0
Non-controlled/affiliated investments | Material Holdings, LLC 1    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance 21,547,000 0
Gross Additions 551,000 21,384,000
Gross Reductions 0 0
Net Change in Unrealized Gains (Losses) (16,000) 163,000
Net Realized Gain (Loss) 0 0
Ending balance 22,082,000 21,547,000
Dividend and Interest Income 574,000 1,378,000
Non-controlled/affiliated investments | Material Holdings, LLC 2    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance 1,397,000 0
Gross Additions 172,000 5,114,000
Gross Reductions 0 0
Net Change in Unrealized Gains (Losses) (626,000) (3,717,000)
Net Realized Gain (Loss) 0 0
Ending balance 943,000 1,397,000
Dividend and Interest Income 0 314,000
Non-controlled/affiliated investments | Material+ Holding Company, LLC    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance 0 0
Gross Additions 0 0
Gross Reductions 0 0
Net Change in Unrealized Gains (Losses) 0 0
Net Realized Gain (Loss) 0 0
Ending balance 0 0
Dividend and Interest Income 0 0
Affiliated investments    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance 29,347,000 5,790,000
Gross Additions 723,000 26,498,000
Gross Reductions 0 0
Net Change in Unrealized Gains (Losses) (649,000) (2,941,000)
Net Realized Gain (Loss) 0 0
Ending balance 29,421,000 29,347,000
Dividend and Interest Income $ 574,000 $ 1,692,000
Qualifying Assets    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 70.00% 70.00%
Non-qualifying Assets    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 13.90% 14.80%
Restricted Securities    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 205.61% 215.43%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance $ 13,092,500,000  
Ending balance $ 12,834,200,000 $ 13,092,500,000
Investment, Identifier [Axis]: 123Dentist, Inc 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[5],[6],[7],[8] 0.02%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[5],[6],[7],[8] $ 1,520,000  
Investment, Identifier [Axis]: 123Dentist, Inc 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[5],[6],[7],[8],[9] 0.00%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[5],[6],[7],[8],[9] $ 87,000  
Investment, Identifier [Axis]: 123Dentist, Inc.    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[10],[11],[12],[13],[14]   0.03%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[11],[12],[13],[14] 1,577,000  
Ending balance [3],[4],[10],[11],[12],[13],[14]   $ 1,577,000
Investment, Identifier [Axis]: 123Dentist, Inc., Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 154,000 191,000
Fair Value $ 0 $ 0
Investment, Identifier [Axis]: ACI Group Holdings, Inc 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[5],[7],[8],[9] 0.01%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[5],[7],[8],[9] $ 925,000  
Investment, Identifier [Axis]: ACI Group Holdings, Inc. 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[10],[14]   2.03%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[14] 123,643,000  
Ending balance [3],[4],[10],[14]   $ 123,643,000
Investment, Identifier [Axis]: ACI Group Holdings, Inc. 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[10],[11],[13],[14]   0.01%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[11],[13],[14] 694,000  
Ending balance [3],[4],[10],[11],[13],[14]   $ 694,000
Investment, Identifier [Axis]: ACI Group Holdings, Inc., Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 10,179,000 10,410,000
Fair Value $ 0 $ 0
Investment, Identifier [Axis]: ACI Group Holdings, Inc.1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[5],[8] 2.00%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[5],[8] $ 124,695,000  
Investment, Identifier [Axis]: ADCS Clinics Intermediate Holdings, LLC 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.11% [1],[2],[8],[15] 0.11% [3],[4],[14],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[14],[16] $ 6,779,000  
Ending balance $ 6,761,000 [1],[2],[8],[15] $ 6,779,000 [3],[4],[14],[16]
Investment, Identifier [Axis]: ADCS Clinics Intermediate Holdings, LLC 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.03% [1],[2],[7],[8],[15] 0.03% [3],[4],[13],[14],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[13],[14],[16] $ 1,625,000  
Ending balance $ 1,620,000 [1],[2],[7],[8],[15] $ 1,625,000 [3],[4],[13],[14],[16]
Investment, Identifier [Axis]: ADCS Clinics Intermediate Holdings, LLC 3    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.00% [1],[2],[7],[8],[9],[15] 0.00% [3],[4],[11],[13],[14],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[11],[13],[14],[16] $ 111,000  
Ending balance 297,000 [1],[2],[7],[8],[9],[15] $ 111,000 [3],[4],[11],[13],[14],[16]
Investment, Identifier [Axis]: ADCS Clinics Intermediate Holdings, LLC, Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 1,003,000 1,189,000
Fair Value $ 0 $ 0
Investment, Identifier [Axis]: AGI Group Holdings LP - Class A-2 Common Units    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.02% [1],[2],[8] 0.02% [3],[4],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[14] $ 1,239,000  
Ending balance 1,239,000 [1],[2],[8] $ 1,239,000 [3],[4],[14]
Investment, Identifier [Axis]: AGI-CFI Holdings, Inc.    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[10],[14]   1.55%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[14] $ 94,440,000  
Ending balance [3],[4],[10],[14]   $ 94,440,000
Investment, Identifier [Axis]: AGI-CFI Holdings, Inc. 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[5],[8] 1.51%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[5],[8] $ 94,196,000  
Investment, Identifier [Axis]: AGI-CFI Holdings, Inc. 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[5],[7],[8] 0.10%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[5],[7],[8] $ 6,133,000  
Investment, Identifier [Axis]: AI Altius Luxembourg S.à r.l.    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.02% [1],[2],[7],[8],[17] 0.02% [11],[13],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [11],[13],[14] $ 1,058,000  
Ending balance $ 1,056,000 [1],[2],[7],[8],[17] $ 1,058,000 [11],[13],[14]
Investment, Identifier [Axis]: AI Altius US Bidco, Inc.    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.12% [1],[2],[5],[8],[9] 0.12% [3],[4],[10],[11],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[11],[14] $ 7,531,000  
Ending balance 7,531,000 [1],[2],[5],[8],[9] $ 7,531,000 [3],[4],[10],[11],[14]
Investment, Identifier [Axis]: AI Altius US Bidco, Inc., Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 500,000 500,000
Fair Value $ 0 $ 0
Investment, Identifier [Axis]: AI Titan Group Holdings, LP - Class A-2 Common Units    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.00% [1],[2],[8] 0.00% [3],[4],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[14] $ 45,000  
Ending balance $ 45,000 [1],[2],[8] $ 45,000 [3],[4],[14]
Investment, Identifier [Axis]: AI Titan Parent Inc    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.07% [1],[2],[5],[7],[8],[9] 0.07% [3],[4],[10],[11],[13],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[11],[13],[14] $ 4,332,000  
Ending balance 4,332,000 [1],[2],[5],[7],[8],[9] $ 4,332,000 [3],[4],[10],[11],[13],[14]
Investment, Identifier [Axis]: AI Titan Parent Inc, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 870,000 870,000
Fair Value (4,000) (4,000)
Investment, Identifier [Axis]: AI Titan Parent Inc, Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 544,000 544,000
Fair Value $ (5,000) $ (5,000)
Investment, Identifier [Axis]: ALKU, LLC 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.01% [1],[2],[5],[7],[8] 0.01% [3],[4],[10],[13],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[13],[14] $ 790,000  
Ending balance $ 788,000 [1],[2],[5],[7],[8] $ 790,000 [3],[4],[10],[13],[14]
Investment, Identifier [Axis]: ALKU, LLC 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.42% [1],[2],[5],[8] 0.43% [3],[4],[10],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[14] $ 26,330,000  
Ending balance $ 26,000,000 [1],[2],[5],[8] $ 26,330,000 [3],[4],[10],[14]
Investment, Identifier [Axis]: AVE Holdings I Corp. - Series A-1 Preferred Shares    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.01% [1],[2],[8] 0.01% [3],[4],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[14] $ 679,000  
Ending balance $ 695,000 [1],[2],[8] $ 679,000 [3],[4],[14]
Investment, Identifier [Axis]: Abacus Holdco 2 Oy    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.01% [1],[2],[6],[7],[8],[9],[17] 0.01% [3],[4],[11],[12],[13],[14],[18]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[11],[12],[13],[14],[18] $ 748,000  
Ending balance 900,000 [1],[2],[6],[7],[8],[9],[17] $ 748,000 [3],[4],[11],[12],[13],[14],[18]
Investment, Identifier [Axis]: Abacus Holdco 2 Oy, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 177,000 298,000
Fair Value $ 0 $ 0
Investment, Identifier [Axis]: Aevex Holdings, LLC    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.75% [1],[2],[8],[15] 0.78% [3],[4],[13],[14],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[13],[14],[16] $ 47,309,000  
Ending balance $ 46,967,000 [1],[2],[8],[15] $ 47,309,000 [3],[4],[13],[14],[16]
Investment, Identifier [Axis]: Albireo Energy, LLC 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 1.19% [1],[2],[7],[8],[15] 1.22% [3],[4],[13],[14],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[13],[14],[16] $ 73,860,000  
Ending balance $ 74,439,000 [1],[2],[7],[8],[15] $ 73,860,000 [3],[4],[13],[14],[16]
Investment, Identifier [Axis]: Albireo Energy, LLC 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.36% [1],[2],[7],[8],[15] 0.36% [3],[4],[13],[14],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[13],[14],[16] $ 22,169,000  
Ending balance $ 22,343,000 [1],[2],[7],[8],[15] $ 22,169,000 [3],[4],[13],[14],[16]
Investment, Identifier [Axis]: Albireo Energy, LLC 3    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.10% [1],[2],[7],[8],[15] 0.10% [3],[4],[13],[14],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[13],[14],[16] $ 5,981,000  
Ending balance $ 6,028,000 [1],[2],[7],[8],[15] $ 5,981,000 [3],[4],[13],[14],[16]
Investment, Identifier [Axis]: Alera Group, Inc 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[5],[8] 0.06%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[5],[8] $ 3,619,000  
Investment, Identifier [Axis]: Alera Group, Inc 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[5],[7],[8] 0.02%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[5],[7],[8] $ 1,283,000  
Investment, Identifier [Axis]: Alera Group, Inc. 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[10],[14]   0.06%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[14] 3,628,000  
Ending balance [3],[4],[10],[14]   $ 3,628,000
Investment, Identifier [Axis]: Alera Group, Inc. 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[7],[11],[14],[16]   0.02%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[7],[11],[14],[16] $ 1,218,000  
Ending balance [3],[4],[7],[11],[14],[16]   $ 1,218,000
Investment, Identifier [Axis]: Alera Group, Inc., Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments   69,000
Fair Value   $ 0
Investment, Identifier [Axis]: Allium Buyer, LLC    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.03% [1],[2],[7],[8],[9],[15] 0.03% [3],[4],[11],[13],[14],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[11],[13],[14],[16] $ 1,573,000  
Ending balance 1,565,000 [1],[2],[7],[8],[9],[15] $ 1,573,000 [3],[4],[11],[13],[14],[16]
Investment, Identifier [Axis]: Allium Buyer, LLC, Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 249,000 249,000
Fair Value $ (7,000) $ (7,000)
Investment, Identifier [Axis]: American Restoration Holdings, LLC 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.07% [1],[2],[7],[8],[15] 0.08% [3],[4],[13],[14],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[13],[14],[16] $ 4,625,000  
Ending balance $ 4,614,000 [1],[2],[7],[8],[15] $ 4,625,000 [3],[4],[13],[14],[16]
Investment, Identifier [Axis]: American Restoration Holdings, LLC 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.02% [1],[2],[7],[8],[15] 0.02% [3],[4],[11],[13],[14],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[11],[13],[14],[16] $ 1,377,000  
Ending balance $ 1,374,000 [1],[2],[7],[8],[15] $ 1,377,000 [3],[4],[11],[13],[14],[16]
Investment, Identifier [Axis]: American Restoration Holdings, LLC 3    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.01% [1],[2],[7],[8],[9],[15] 0.00% [3],[4],[11],[13],[14],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[11],[13],[14],[16] $ 286,000  
Ending balance $ 524,000 [1],[2],[7],[8],[9],[15] $ 286,000 [3],[4],[11],[13],[14],[16]
Investment, Identifier [Axis]: American Restoration Holdings, LLC 4    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.06% [1],[2],[7],[8],[15] 0.04% [3],[4],[11],[13],[14],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[11],[13],[14],[16] $ 2,451,000  
Ending balance $ 3,559,000 [1],[2],[7],[8],[15] $ 2,451,000 [3],[4],[11],[13],[14],[16]
Investment, Identifier [Axis]: American Restoration Holdings, LLC 5    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[7],[8],[9],[15] 0.00%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[7],[8],[9],[15] $ 158,000  
Investment, Identifier [Axis]: American Restoration Holdings, LLC, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 8,088,000 1,105,000
Fair Value 0 0
Investment, Identifier [Axis]: American Restoration Holdings, LLC, Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 785,000 1,024,000
Fair Value $ 0 $ 0
Investment, Identifier [Axis]: Amerilife Holdings, LLC 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 1.55% [1],[2],[5],[8],[9] 0.04% [3],[4],[7],[10],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[7],[10],[14] $ 2,654,000  
Ending balance $ 97,033,000 [1],[2],[5],[8],[9] $ 2,654,000 [3],[4],[7],[10],[14]
Investment, Identifier [Axis]: Amerilife Holdings, LLC 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [7] 0.01% [1],[2],[5],[8],[9] 0.01% [3],[4],[11],[14],[19]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[7],[11],[14],[19] $ 357,000  
Ending balance [7] 318,000 [1],[2],[5],[8],[9] $ 357,000 [3],[4],[11],[14],[19]
Investment, Identifier [Axis]: Amerilife Holdings, LLC, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments   340,000
Fair Value   0
Investment, Identifier [Axis]: Amerilife Holdings, LLC, Delayed Draw Term Loan 1    
Schedule of Investments [Line Items]    
Unfunded commitments 340,000  
Fair Value 0  
Investment, Identifier [Axis]: Amerilife Holdings, LLC, Delayed Draw Term Loan 2    
Schedule of Investments [Line Items]    
Unfunded commitments 31,555,000  
Fair Value (79,000)  
Investment, Identifier [Axis]: Amerilife Holdings, LLC, Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 16,020,000 243,000
Fair Value $ 0 $ 0
Investment, Identifier [Axis]: Amerivet Partners Management, Inc    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[8],[9],[15] 0.09%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[8],[9],[15] $ 5,529,000  
Investment, Identifier [Axis]: Amerivet Partners Management, Inc.    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[11],[13],[14],[16]   0.09%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[11],[13],[14],[16] 5,543,000  
Ending balance [3],[4],[11],[13],[14],[16]   $ 5,543,000
Investment, Identifier [Axis]: Amerivet Partners Management, Inc., Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 589,000 589,000
Fair Value $ 0 $ 0
Investment, Identifier [Axis]: Anaplan, Inc. 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.03% [1],[2],[5],[7],[8],[9] 0.03% [3],[4],[10],[11],[13],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[11],[13],[14] $ 1,804,000  
Ending balance $ 1,799,000 [1],[2],[5],[7],[8],[9] $ 1,804,000 [3],[4],[10],[11],[13],[14]
Investment, Identifier [Axis]: Anaplan, Inc. 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.31% [1],[2],[5],[8] 0.32% [3],[4],[10],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[14] $ 19,227,000  
Ending balance 19,179,000 [1],[2],[5],[8] $ 19,227,000 [3],[4],[10],[14]
Investment, Identifier [Axis]: Anaplan, Inc., Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 161,000 161,000
Fair Value $ 0 $ 0
Investment, Identifier [Axis]: Apex Companies, LLC 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.17% [1],[2],[7],[8],[15] 0.18% [3],[4],[13],[14],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[13],[14],[16] $ 10,869,000  
Ending balance $ 10,842,000 [1],[2],[7],[8],[15] $ 10,869,000 [3],[4],[13],[14],[16]
Investment, Identifier [Axis]: Apex Companies, LLC 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.03% [1],[2],[7],[8],[15] 0.03% [3],[4],[13],[14],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[13],[14],[16] $ 1,957,000  
Ending balance $ 1,955,000 [1],[2],[7],[8],[15] $ 1,957,000 [3],[4],[13],[14],[16]
Investment, Identifier [Axis]: Apex Companies, LLC 3    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.04% [1],[2],[7],[8],[9],[15] 0.04% [3],[4],[11],[13],[14],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[11],[13],[14],[16] $ 2,731,000  
Ending balance 2,724,000 [1],[2],[7],[8],[9],[15] $ 2,731,000 [3],[4],[11],[13],[14],[16]
Investment, Identifier [Axis]: Apex Companies, LLC, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 5,507,000 5,507,000
Fair Value $ 0 $ 0
Investment, Identifier [Axis]: Armada Parent, Inc.    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.41% [1],[2],[5],[8],[9] 0.42% [3],[4],[10],[11],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[11],[14] $ 25,479,000  
Ending balance 25,663,000 [1],[2],[5],[8],[9] $ 25,479,000 [3],[4],[10],[11],[14]
Investment, Identifier [Axis]: Armada Parent, Inc., Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 2,750,000 3,000,000
Fair Value $ 0 $ 0
Investment, Identifier [Axis]: Arnhem BidCo GmbH    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.84% [1],[2],[6],[8],[9],[17] 0.82% [3],[4],[11],[12],[14],[18]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[11],[12],[14],[18] $ 50,061,000  
Ending balance 52,258,000 [1],[2],[6],[8],[9],[17] $ 50,061,000 [3],[4],[11],[12],[14],[18]
Investment, Identifier [Axis]: Arnhem BidCo GmbH, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 12,332,000 12,293,000
Fair Value $ (60,000) (58,000)
Investment, Identifier [Axis]: Artisan Acquisitionco Ltd, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments   7,938,000
Fair Value   $ 0
Investment, Identifier [Axis]: Artisan Acquisitionco, Ltd.    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.90% [1],[2],[6],[8],[9],[17] 0.92% [3],[4],[11],[12],[14],[18]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[11],[12],[14],[18] $ 56,154,000  
Ending balance 56,075,000 [1],[2],[6],[8],[9],[17] $ 56,154,000 [3],[4],[11],[12],[14],[18]
Investment, Identifier [Axis]: Artisan Acquisitionco, Ltd., Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 7,938,000  
Fair Value $ (79,000)  
Investment, Identifier [Axis]: Ascend Buyer, LLC 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.33% [1],[2],[5],[8],[9] 0.34% [3],[4],[10],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[14] $ 20,460,000  
Ending balance $ 20,407,000 [1],[2],[5],[8],[9] $ 20,460,000 [3],[4],[10],[14]
Investment, Identifier [Axis]: Ascend Buyer, LLC 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.03% [1],[2],[5],[7],[8] 0.01% [3],[4],[10],[11],[13],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[11],[13],[14] $ 647,000  
Ending balance 1,611,000 [1],[2],[5],[7],[8] $ 647,000 [3],[4],[10],[11],[13],[14]
Investment, Identifier [Axis]: Ascend Buyer, LLC, Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 2,991,000 1,293,000
Fair Value $ 0 $ 0
Investment, Identifier [Axis]: AuditBoard Inc    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.15% [1],[2],[5],[8],[9] 0.15% [3],[4],[10],[11],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[11],[14] $ 9,138,000  
Ending balance 9,220,000 [1],[2],[5],[8],[9] $ 9,138,000 [3],[4],[10],[11],[14]
Investment, Identifier [Axis]: AuditBoard Inc, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 4,414,000 4,414,000
Fair Value (22,000) (22,000)
Investment, Identifier [Axis]: AuditBoard Inc, Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 1,766,000 1,766,000
Fair Value (4,000) $ (18,000)
Investment, Identifier [Axis]: Azurite Intermediate Holdings Inc.    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[10],[11],[14]   0.61%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[11],[14] $ 36,936,000  
Ending balance [3],[4],[10],[11],[14]   $ 36,936,000
Investment, Identifier [Axis]: Azurite Intermediate Holdings Inc., Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments   4,104,000
Fair Value   $ 0
Investment, Identifier [Axis]: Azurite Intermediate Holdings, Inc.    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[5],[8],[9] 0.59%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[5],[8],[9] $ 36,936,000  
Investment, Identifier [Axis]: Azurite Intermediate Holdings, Inc., Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 4,104,000  
Fair Value 0  
Investment, Identifier [Axis]: BP Purchaser, LLC    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[10],[14]   0.10%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[14] $ 6,338,000  
Ending balance [3],[4],[10],[14]   $ 6,338,000
Investment, Identifier [Axis]: BP Purchaser, LLC    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[5],[8] 0.10%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[5],[8] $ 6,431,000  
Investment, Identifier [Axis]: BPPH2 Limited 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[6],[7],[8],[17] 0.11%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[6],[7],[8],[17] $ 7,075,000  
Investment, Identifier [Axis]: BPPH2 Limited 4    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[5],[6],[7],[8] 0.03%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[5],[6],[7],[8] $ 1,752,000  
Investment, Identifier [Axis]: BPPH2 Limited 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.54% [1],[2],[6],[7],[8],[17] 0.54% [3],[4],[12],[13],[14],[18]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[12],[13],[14],[18] $ 32,925,000  
Ending balance 33,973,000 [1],[2],[6],[7],[8],[17] $ 32,925,000 [3],[4],[12],[13],[14],[18]
Investment, Identifier [Axis]: BPPH2 Limited 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[12],[13],[14],[18]   0.11%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[12],[13],[14],[18] $ 6,689,000  
Ending balance [3],[4],[12],[13],[14],[18]   $ 6,689,000
Investment, Identifier [Axis]: BPPH2 Limited 3    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.04% [1],[2],[5],[6],[7],[8] 0.04% [3],[4],[10],[12],[13],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[12],[13],[14] $ 2,288,000  
Ending balance 2,343,000 [1],[2],[5],[6],[7],[8] $ 2,288,000 [3],[4],[10],[12],[13],[14]
Investment, Identifier [Axis]: BPPH2 Limited 4    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[10],[12],[13],[14]   0.03%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[12],[13],[14] $ 1,709,000  
Ending balance [3],[4],[10],[12],[13],[14]   $ 1,709,000
Investment, Identifier [Axis]: Baker Tilly Advisory Group LP    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.74% [1],[2],[5],[8],[9] 0.77% [3],[4],[10],[11],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[11],[14] $ 46,559,000  
Ending balance 46,442,000 [1],[2],[5],[8],[9] $ 46,559,000 [3],[4],[10],[11],[14]
Investment, Identifier [Axis]: Baker Tilly Advisory Group LP, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 7,034,000 7,034,000
Fair Value (53,000) (53,000)
Investment, Identifier [Axis]: Baker Tilly Advisory Group LP, Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 9,856,000 9,856,000
Fair Value $ 0 $ 0
Investment, Identifier [Axis]: Bamboo US BidCo, LLC 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.01% [1],[2],[8] 0.01% [3],[4],[11],[13],[14],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[11],[13],[14],[16] $ 759,000  
Ending balance $ 694,000 [1],[2],[8] $ 759,000 [3],[4],[11],[13],[14],[16]
Investment, Identifier [Axis]: Bamboo US BidCo, LLC 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.01% [1],[2],[7],[8],[15] 0.01% [3],[4],[13],[14],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[13],[14],[16] $ 367,000  
Ending balance $ 382,000 [1],[2],[7],[8],[15] $ 367,000 [3],[4],[13],[14],[16]
Investment, Identifier [Axis]: Bamboo US BidCo, LLC 3    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[7],[8],[15] 0.00%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[7],[8],[15] $ 106,000  
Investment, Identifier [Axis]: Bamboo US BidCo, LLC, Delayed Draw Term Loan 1    
Schedule of Investments [Line Items]    
Unfunded commitments 146,000 43,000
Fair Value 0 0
Investment, Identifier [Axis]: Bamboo US BidCo, LLC, Delayed Draw Term Loan 2    
Schedule of Investments [Line Items]    
Unfunded commitments 146,000 146,000
Fair Value (1,000) 0
Investment, Identifier [Axis]: Bamboo US BidCo, LLC, Delayed Draw Term Loan 3    
Schedule of Investments [Line Items]    
Unfunded commitments   146,000
Fair Value   (1,000)
Investment, Identifier [Axis]: Bamboo US BidCo, LLC, Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 142,000 142,000
Fair Value $ 0 $ 0
Investment, Identifier [Axis]: Banyan Software Holdings, LLC 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[7],[8],[15] 0.15%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[7],[8],[15] $ 9,297,000  
Investment, Identifier [Axis]: Banyan Software Holdings, LLC 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[7],[8],[9],[15] 0.03%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[7],[8],[9],[15] $ 1,910,000  
Investment, Identifier [Axis]: Banyan Software Holdings, LLC, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 3,076,000  
Fair Value 0  
Investment, Identifier [Axis]: Banyan Software Holdings, LLC, Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 1,006,000  
Fair Value $ (10,000)  
Investment, Identifier [Axis]: Barbri Holdings, Inc 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[5],[8] 0.98%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[5],[8] $ 61,387,000  
Investment, Identifier [Axis]: Barbri Holdings, Inc 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[5],[8] 0.31%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[5],[8] $ 19,479,000  
Investment, Identifier [Axis]: Barbri Holdings, Inc. 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[10],[14]   1.01%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[14] 61,249,000  
Ending balance [3],[4],[10],[14]   $ 61,249,000
Investment, Identifier [Axis]: Barbri Holdings, Inc. 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[10],[14]   0.32%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[14] $ 19,381,000  
Ending balance [3],[4],[10],[14]   $ 19,381,000
Investment, Identifier [Axis]: Bayshore Intermediate #2 LP    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 1.52% [1],[2],[5],[7],[8],[9] 1.55% [3],[4],[10],[11],[13],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[11],[13],[14] $ 94,115,000  
Ending balance 94,916,000 [1],[2],[5],[7],[8],[9] $ 94,115,000 [3],[4],[10],[11],[13],[14]
Investment, Identifier [Axis]: Bayshore Intermediate #2 LP, Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments   4,217,000
Fair Value   (42,000)
Investment, Identifier [Axis]: Bayshore Intermediate #2 LP, Revolver 1    
Schedule of Investments [Line Items]    
Unfunded commitments 4,217,000  
Fair Value (42,000)  
Investment, Identifier [Axis]: Bayshore Intermediate #2 LP, Revolver 2    
Schedule of Investments [Line Items]    
Unfunded commitments 5,006,000 5,006,000
Fair Value $ 0 $ 0
Investment, Identifier [Axis]: Bazaarvoice, Inc.    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 3.82% [1],[2],[8],[9],[17] 4.07% [3],[4],[11],[14],[18]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[11],[14],[18] $ 247,360,000  
Ending balance 238,337,000 [1],[2],[8],[9],[17] $ 247,360,000 [3],[4],[11],[14],[18]
Investment, Identifier [Axis]: Bazaarvoice, Inc., Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 37,992,000 20,255,000
Fair Value $ 0 $ 0
Investment, Identifier [Axis]: Bending Spoons US, Inc.    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[6],[15] 0.23%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[6],[15] $ 14,408,000  
Investment, Identifier [Axis]: Bidco 76 S.p.A.    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.31% [1],[2],[6],[8],[9],[17] 0.33% [3],[4],[11],[12],[14],[18]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[11],[12],[14],[18] $ 20,325,000  
Ending balance 19,449,000 [1],[2],[6],[8],[9],[17] $ 20,325,000 [3],[4],[11],[12],[14],[18]
Investment, Identifier [Axis]: Bidco 76 S.p.A., Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 3,849,000 4,199,000
Fair Value $ 0 $ 0
Investment, Identifier [Axis]: Bimini Group Purchaser Inc 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.81% [1],[2],[5],[8] 0.84% [3],[4],[10],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[14] $ 50,912,000  
Ending balance $ 50,784,000 [1],[2],[5],[8] $ 50,912,000 [3],[4],[10],[14]
Investment, Identifier [Axis]: Bimini Group Purchaser Inc 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.03% [1],[2],[5],[7],[8],[9] 0.03% [3],[4],[10],[11],[13],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[11],[13],[14] $ 2,008,000  
Ending balance 2,008,000 [1],[2],[5],[7],[8],[9] $ 2,008,000 [3],[4],[10],[11],[13],[14]
Investment, Identifier [Axis]: Bimini Group Purchaser Inc, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 18,925,000 18,925,000
Fair Value (95,000) (95,000)
Investment, Identifier [Axis]: Bimini Group Purchaser Inc, Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 2,804,000 2,804,000
Fair Value $ 0 $ 0
Investment, Identifier [Axis]: BlackRock ICS US Treasury Fund    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.00% [1],[2] 0.00% [3],[4]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4] $ 260,000  
Ending balance $ 283,000 [1],[2] $ 260,000 [3],[4]
Investment, Identifier [Axis]: Blackstone Donegal Holdings LP - LP Interest (Westland Insurance Group LTD)    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.10% [1],[2],[6],[8],[20] 0.11% [3],[4],[12],[14],[21]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[12],[14],[21] $ 6,403,000  
Ending balance $ 6,396,000 [1],[2],[6],[8],[20] $ 6,403,000 [3],[4],[12],[14],[21]
Investment, Identifier [Axis]: BlueCat Networks USA, Inc. 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.03% [1],[2],[5],[7],[8] 0.03% [3],[4],[10],[13],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[13],[14] $ 1,950,000  
Ending balance $ 1,950,000 [1],[2],[5],[7],[8] $ 1,950,000 [3],[4],[10],[13],[14]
Investment, Identifier [Axis]: BlueCat Networks USA, Inc. 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.01% [1],[2],[5],[7],[8] 0.01% [3],[4],[10],[13],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[13],[14] $ 344,000  
Ending balance $ 344,000 [1],[2],[5],[7],[8] $ 344,000 [3],[4],[10],[13],[14]
Investment, Identifier [Axis]: BlueCat Networks USA, Inc. 3    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.00% [1],[2],[5],[7],[8] 0.00% [3],[4],[10],[13],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[13],[14] $ 237,000  
Ending balance $ 237,000 [1],[2],[5],[7],[8] $ 237,000 [3],[4],[10],[13],[14]
Investment, Identifier [Axis]: BlueCat Networks USA, Inc. 4    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.03% [1],[2],[5],[7],[8] 0.03% [3],[4],[10],[13],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[13],[14] $ 1,583,000  
Ending balance $ 1,583,000 [1],[2],[5],[7],[8] $ 1,583,000 [3],[4],[10],[13],[14]
Investment, Identifier [Axis]: Bluefin Holding, LLC    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.44% [1],[2],[8],[9],[15] 0.45% [3],[4],[11],[14],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[11],[14],[16] $ 27,217,000  
Ending balance 27,217,000 [1],[2],[8],[9],[15] $ 27,217,000 [3],[4],[11],[14],[16]
Investment, Identifier [Axis]: Bluefin Holding, LLC, Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 2,244,000 2,244,000
Fair Value $ (6,000) $ (6,000)
Investment, Identifier [Axis]: Box Co-Invest Blocker, LLC - (BP Alpha Holdings, L.P.) - Class A Units    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.00% [1],[2],[8] 0.00% [3],[4],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[14] $ 0  
Ending balance $ 0 [1],[2],[8] $ 0 [3],[4],[14]
Investment, Identifier [Axis]: Box Co-Invest Blocker, LLC - (BP Alpha Holdings, L.P.) - Class C Preferred Units    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.00% [1],[2],[8] 0.00% [3],[4],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[14] $ 16,000  
Ending balance $ 0 [1],[2],[8] $ 16,000 [3],[4],[14]
Investment, Identifier [Axis]: Bradyplus Holdings LLC 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 1.56% [1],[2],[8],[15] 1.61% [3],[4]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4] $ 97,868,000  
Ending balance $ 97,595,000 [1],[2],[8],[15] $ 97,868,000 [3],[4]
Investment, Identifier [Axis]: Bradyplus Holdings LLC 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.01% [1],[2],[7],[8],[9],[15] 0.01% [3],[4],[11],[14],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[11],[14],[16] $ 619,000  
Ending balance 595,000 [1],[2],[7],[8],[9],[15] $ 619,000 [3],[4],[11],[14],[16]
Investment, Identifier [Axis]: Bradyplus Holdings LLC, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 2,260,000 2,260,000
Fair Value $ 0 $ 0
Investment, Identifier [Axis]: Brave Parent Holdings, Inc.    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 1.08% [1],[2],[5],[8],[9] 1.12% [3],[4],[10],[11],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[11],[14] $ 67,765,000  
Ending balance 67,595,000 [1],[2],[5],[8],[9] $ 67,765,000 [3],[4],[10],[11],[14]
Investment, Identifier [Axis]: Brave Parent Holdings, Inc., Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 3,058,000 3,058,000
Fair Value 0 0
Investment, Identifier [Axis]: Brave Parent Holdings, Inc., Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 3,641,000 3,641,000
Fair Value $ 0 $ 0
Investment, Identifier [Axis]: Brilliance Technologies, Inc    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[6],[7],[8],[22] 0.02%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[6],[7],[8],[22] $ 1,482,000  
Investment, Identifier [Axis]: Brilliance Technologies, Inc., Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 2,400,000  
Fair Value (6,000)  
Investment, Identifier [Axis]: Brilliance Technologies, Inc., Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 900,000  
Fair Value $ (5,000)  
Investment, Identifier [Axis]: CB Nike Holdco LLC    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.58% [1],[2],[7],[8],[15] 0.61% [3],[4],[13],[14],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[13],[14],[16] $ 36,964,000  
Ending balance 35,941,000 [1],[2],[7],[8],[15] $ 36,964,000 [3],[4],[13],[14],[16]
Investment, Identifier [Axis]: CB Nike Holdco LLC 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[11],[13],[14],[16]   0.19%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[11],[13],[14],[16] $ 11,258,000  
Ending balance [3],[4],[11],[13],[14],[16]   $ 11,258,000
Investment, Identifier [Axis]: CB Nike Holdco LLC, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments   11,606,000
Fair Value   (87,000)
Investment, Identifier [Axis]: CB Nike Holdco LLC, Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments   5,803,000
Fair Value   $ (87,000)
Investment, Identifier [Axis]: CCBlue Bidco, Inc    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[5],[7],[8] 0.17%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[5],[7],[8] $ 10,365,000  
Investment, Identifier [Axis]: CCBlue Bidco, Inc.    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[10],[13],[14]   0.17%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[13],[14] $ 10,382,000  
Ending balance [3],[4],[10],[13],[14]   $ 10,382,000
Investment, Identifier [Axis]: CFCo, LLC (Benefytt Technologies, Inc.    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[7],[8],[17],[23],[24] 0.00%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[7],[8],[17],[23],[24] $ 0  
Investment, Identifier [Axis]: CFCo, LLC (Benefytt Technologies, Inc.)    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[7],[13],[14],[18],[25],[26]   0.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[7],[13],[14],[18],[25],[26] $ 0  
Ending balance [3],[4],[7],[13],[14],[18],[25],[26]   $ 0
Investment, Identifier [Axis]: CFCo, LLC (Benefytt Technologies, Inc.) - Class B Units    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.00% [1],[2],[8] 0.00% [3],[4],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[14] $ 0  
Ending balance $ 0 [1],[2],[8] $ 0 [3],[4],[14]
Investment, Identifier [Axis]: CFGI Holdings, LLC    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.11% [1],[2],[5],[8],[9] 0.11% [3],[4],[10],[11],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[11],[14] $ 6,866,000  
Ending balance 6,846,000 [1],[2],[5],[8],[9] $ 6,866,000 [3],[4],[10],[11],[14]
Investment, Identifier [Axis]: CFGI Holdings, LLC, Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 1,050,000 1,050,000
Fair Value $ (21,000) $ (21,000)
Investment, Identifier [Axis]: CFS Brands, LLC    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 2.07% [1],[2],[8],[9],[15] 2.02% [3],[4],[11],[14],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[11],[14],[16] $ 123,041,000  
Ending balance 129,330,000 [1],[2],[8],[9],[15] $ 123,041,000 [3],[4],[11],[14],[16]
Investment, Identifier [Axis]: CFS Brands, LLC, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments   6,241,000
Fair Value   (62,000)
Investment, Identifier [Axis]: CFS Brands, LLC, Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 18,177,000 18,177,000
Fair Value 0 $ (364,000)
Investment, Identifier [Axis]: COP Home Services TopCo IV, Inc.    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[11],[14],[16]   0.61%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[11],[14],[16] $ 37,292,000  
Ending balance [3],[4],[11],[14],[16]   $ 37,292,000
Investment, Identifier [Axis]: COP Home Services TopCo IV, Inc., Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments   3,509,000
Fair Value   $ (38,000)
Investment, Identifier [Axis]: CPI Buyer, LLC 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.44% [1],[2],[5],[8] 0.45% [3],[4],[10],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[14] $ 27,292,000  
Ending balance $ 27,707,000 [1],[2],[5],[8] $ 27,292,000 [3],[4],[10],[14]
Investment, Identifier [Axis]: CPI Buyer, LLC 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.05% [1],[2],[5],[8] 0.05% [3],[4],[10],[13],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[13],[14] $ 2,913,000  
Ending balance $ 2,963,000 [1],[2],[5],[8] $ 2,913,000 [3],[4],[10],[13],[14]
Investment, Identifier [Axis]: CPI Buyer, LLC 3    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.04% [1],[2],[5],[7],[8],[9] 0.02% [3],[4],[10],[11],[13],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[11],[13],[14] $ 1,505,000  
Ending balance 2,210,000 [1],[2],[5],[7],[8],[9] $ 1,505,000 [3],[4],[10],[11],[13],[14]
Investment, Identifier [Axis]: CPI Buyer, LLC, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 311,000 985,000
Fair Value 0 0
Investment, Identifier [Axis]: CPI Buyer, LLC, Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 3,214,000 3,214,000
Fair Value $ (64,000) $ (64,000)
Investment, Identifier [Axis]: CRCI Longhorn Holdings Inc 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.18% [1],[2],[5],[7],[8],[9] 0.19% [3],[4],[10],[13],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[13],[14] $ 11,412,000  
Ending balance $ 11,426,000 [1],[2],[5],[7],[8],[9] $ 11,412,000 [3],[4],[10],[13],[14]
Investment, Identifier [Axis]: CRCI Longhorn Holdings Inc 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.02% [1],[2],[5],[7],[8],[9] 0.01% [3],[4],[10],[11],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[11],[14] $ 836,000  
Ending balance 994,000 [1],[2],[5],[7],[8],[9] $ 836,000 [3],[4],[10],[11],[14]
Investment, Identifier [Axis]: CRCI Longhorn Holdings Inc, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 2,867,000 2,867,000
Fair Value (14,000) (14,000)
Investment, Identifier [Axis]: CRCI Longhorn Holdings Inc, Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 918,000 1,051,000
Fair Value $ 0 $ 0
Investment, Identifier [Axis]: CT Technologies Intermediate Holdings, Inc    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[5],[8],[9] 0.45%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[5],[8],[9] $ 28,184,000  
Investment, Identifier [Axis]: CT Technologies Intermediate Holdings, Inc.    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[10],[11],[14]   0.47%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[11],[14] 28,322,000  
Ending balance [3],[4],[10],[11],[14]   $ 28,322,000
Investment, Identifier [Axis]: CT Technologies Intermediate Holdings, Inc., Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 973,000 973,000
Fair Value 0 0
Investment, Identifier [Axis]: CT Technologies Intermediate Holdings, Inc., Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 2,433,000 2,433,000
Fair Value $ (24,000) $ (24,000)
Investment, Identifier [Axis]: Caerus Midco 2 S.à r.l. - Additional Vehicle Units    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.00% [1],[2],[6],[8] 0.00% [3],[4],[12],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[12],[14] $ 1,000  
Ending balance $ 1,000 [1],[2],[6],[8] $ 1,000 [3],[4],[12],[14]
Investment, Identifier [Axis]: Caerus Midco 2 S.à r.l. - Vehicle Units    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.00% [1],[2],[6],[8] 0.00% [3],[4],[12],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[12],[14] $ 54,000  
Ending balance $ 54,000 [1],[2],[6],[8] $ 54,000 [3],[4],[12],[14]
Investment, Identifier [Axis]: Caerus US 1, Inc 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[5],[6],[7],[8] 0.18%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[5],[6],[7],[8] $ 11,257,000  
Investment, Identifier [Axis]: Caerus US 1, Inc 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[5],[6],[7],[8] 0.03%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[5],[6],[7],[8] $ 2,170,000  
Investment, Identifier [Axis]: Caerus US 1, Inc 3    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[5],[6],[7],[8] 0.01%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[5],[6],[7],[8] $ 318,000  
Investment, Identifier [Axis]: Caerus US 1, Inc 4    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[5],[6],[8] 0.80%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[5],[6],[8] $ 49,650,000  
Investment, Identifier [Axis]: Caerus US 1, Inc 5    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[5],[6],[7],[8],[9] 0.00%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[5],[6],[7],[8],[9] $ 32,000  
Investment, Identifier [Axis]: Caerus US 1, Inc. 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[10],[12],[13],[14]   0.19%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[12],[13],[14] 11,284,000  
Ending balance [3],[4],[10],[12],[13],[14]   $ 11,284,000
Investment, Identifier [Axis]: Caerus US 1, Inc. 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[10],[12],[13],[14]   0.04%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[12],[13],[14] 2,176,000  
Ending balance [3],[4],[10],[12],[13],[14]   $ 2,176,000
Investment, Identifier [Axis]: Caerus US 1, Inc. 3    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[10],[12],[13],[14]   0.01%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[12],[13],[14] 318,000  
Ending balance [3],[4],[10],[12],[13],[14]   $ 318,000
Investment, Identifier [Axis]: Caerus US 1, Inc. 4    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[12],[14],[18]   0.82%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[12],[14],[18] 49,714,000  
Ending balance [3],[4],[12],[14],[18]   $ 49,714,000
Investment, Identifier [Axis]: Caerus US 1, Inc. 5    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[11],[12],[13],[14],[27]   0.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[11],[12],[13],[14],[27] 97,000  
Ending balance [3],[4],[11],[12],[13],[14],[27]   $ 97,000
Investment, Identifier [Axis]: Caerus US 1, Inc., Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 1,255,000 1,190,000
Fair Value $ 0 $ 0
Investment, Identifier [Axis]: Cambium Holdings, LLC - Senior Preferred Interest    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.30% [1],[2],[8] 0.29% [3],[4],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[14] $ 17,874,000  
Ending balance $ 18,441,000 [1],[2],[8] $ 17,874,000 [3],[4],[14]
Investment, Identifier [Axis]: Cambium Learning Group, Inc    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[5],[8],[9] 4.57%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[5],[8],[9] $ 285,446,000  
Investment, Identifier [Axis]: Cambium Learning Group, Inc.    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[10],[11],[14]   4.71%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[11],[14] 286,185,000  
Ending balance [3],[4],[10],[11],[14]   $ 286,185,000
Investment, Identifier [Axis]: Cambium Learning Group, Inc., Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 43,592,000 43,592,000
Fair Value $ 0 $ 0
Investment, Identifier [Axis]: Cambrex Corp.    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[5],[7],[8],[9] 0.35%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[5],[7],[8],[9] $ 21,994,000  
Investment, Identifier [Axis]: Cambrex Corp., Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 3,323,000  
Fair Value 0  
Investment, Identifier [Axis]: Cambrex Corp., Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 2,907,000  
Fair Value $ (29,000)  
Investment, Identifier [Axis]: Canadian Hospital Specialties Ltd 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[6],[7],[8],[15] 0.32%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[6],[7],[8],[15] $ 20,015,000  
Investment, Identifier [Axis]: Canadian Hospital Specialties Ltd 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[5],[6],[7],[8],[9] 0.02%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[5],[6],[7],[8],[9] $ 1,505,000  
Investment, Identifier [Axis]: Canadian Hospital Specialties Ltd.    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.11% [1],[2],[6],[7],[8],[17] 0.11% [3],[4],[12],[13],[14],[18]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[12],[13],[14],[18] $ 6,723,000  
Ending balance 6,715,000 [1],[2],[6],[7],[8],[17] $ 6,723,000 [3],[4],[12],[13],[14],[18]
Investment, Identifier [Axis]: Canadian Hospital Specialties Ltd. 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[12],[13],[14],[16]   0.33%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[12],[13],[14],[16] 20,100,000  
Ending balance [3],[4],[12],[13],[14],[16]   $ 20,100,000
Investment, Identifier [Axis]: Canadian Hospital Specialties Ltd. 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[10],[11],[12],[13],[14]   0.02%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[11],[12],[13],[14] 1,507,000  
Ending balance [3],[4],[10],[11],[12],[13],[14]   $ 1,507,000
Investment, Identifier [Axis]: Canadian Hospital Specialties Ltd., Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 1,198,000 1,198,000
Fair Value $ 0 $ 0
Investment, Identifier [Axis]: Capstone Acquisition Holdings Inc    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.09% [1],[2],[8],[15] 0.09% [3],[4],[14],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[14],[16] $ 5,459,000  
Ending balance $ 5,446,000 [1],[2],[8],[15] $ 5,459,000 [3],[4],[14],[16]
Investment, Identifier [Axis]: Caribou Bidco Ltd    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.81% [1],[2],[6],[8],[17] 0.73% [3],[4],[11],[12],[14],[18]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[11],[12],[14],[18] $ 44,135,000  
Ending balance $ 50,740,000 [1],[2],[6],[8],[17] $ 44,135,000 [3],[4],[11],[12],[14],[18]
Investment, Identifier [Axis]: Caribou Bidco Ltd, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments   5,106,000
Fair Value   $ (25,000)
Investment, Identifier [Axis]: Carr Riggs & Ingram Capital LLC 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.12% [1],[2],[7],[8],[22] 0.12% [3],[4],[13],[14],[28]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[13],[14],[28] $ 7,369,000  
Ending balance $ 7,407,000 [1],[2],[7],[8],[22] $ 7,369,000 [3],[4],[13],[14],[28]
Investment, Identifier [Axis]: Carr Riggs & Ingram Capital LLC 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.02% [1],[2],[7],[8],[9],[22] 0.00% [3],[4],[11],[13],[14],[28]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[11],[13],[14],[28] $ 180,000  
Ending balance 1,019,000 [1],[2],[7],[8],[9],[22] $ 180,000 [3],[4],[11],[13],[14],[28]
Investment, Identifier [Axis]: Carr Riggs & Ingram Capital LLC, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 3,161,000 3,776,000
Fair Value 0 (19,000)
Investment, Identifier [Axis]: Carr Riggs & Ingram Capital LLC, Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 1,295,000 1,510,000
Fair Value $ 0 $ 0
Investment, Identifier [Axis]: Cassipoee SASU    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[6],[7],[8],[17] 0.00%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[6],[7],[8],[17] $ 170,000  
Investment, Identifier [Axis]: Castle Management Borrower, LLC    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.39% [1],[2],[8],[9],[15] 0.38% [3],[4],[11],[14],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[11],[14],[16] $ 23,100,000  
Ending balance 24,150,000 [1],[2],[8],[9],[15] $ 23,100,000 [3],[4],[11],[14],[16]
Investment, Identifier [Axis]: Castle Management Borrower, LLC, Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 1,808,000 2,917,000
Fair Value $ 0 $ 0
Investment, Identifier [Axis]: Channelside AcquisitionCo, Inc    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[5],[7],[8],[9] 0.32%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[5],[7],[8],[9] $ 19,693,000  
Investment, Identifier [Axis]: Channelside AcquisitionCo, Inc.    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[10],[11],[13],[14]   0.32%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[11],[13],[14] 19,694,000  
Ending balance [3],[4],[10],[11],[13],[14]   $ 19,694,000
Investment, Identifier [Axis]: Channelside AcquisitionCo, Inc., Delayed Draw Term Loan 1    
Schedule of Investments [Line Items]    
Unfunded commitments 1,980,000 1,980,000
Fair Value (10,000) (10,000)
Investment, Identifier [Axis]: Channelside AcquisitionCo, Inc., Delayed Draw Term Loan 2    
Schedule of Investments [Line Items]    
Unfunded commitments 19,000 19,000
Fair Value 0 0
Investment, Identifier [Axis]: Channelside AcquisitionCo, Inc., Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 3,178,000 3,178,000
Fair Value $ 0 $ 0
Investment, Identifier [Axis]: Charger Debt Merger Sub, LLC 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.19% [1],[2],[5],[7],[8] 0.20% [3],[4],[10],[13],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[13],[14] $ 11,927,000  
Ending balance $ 11,897,000 [1],[2],[5],[7],[8] $ 11,927,000 [3],[4],[10],[13],[14]
Investment, Identifier [Axis]: Charger Debt Merger Sub, LLC 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.05% [1],[2],[5],[7],[8],[9] 0.04% [3],[4],[10],[11],[13],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[11],[13],[14] $ 2,528,000  
Ending balance 3,369,000 [1],[2],[5],[7],[8],[9] $ 2,528,000 [3],[4],[10],[11],[13],[14]
Investment, Identifier [Axis]: Charger Debt Merger Sub, LLC, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 3,107,000 3,972,000
Fair Value 0 0
Investment, Identifier [Axis]: Charger Debt Merger Sub, LLC, Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 1,522,000 1,522,000
Fair Value $ (15,000) $ (15,000)
Investment, Identifier [Axis]: Chartwell Cumming Holding, Corp. 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[8],[9],[15] 1.39%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[8],[9],[15] $ 86,942,000  
Investment, Identifier [Axis]: Chartwell Cumming Holding, Corp. 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[7],[8],[9],[15] 0.17%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[7],[8],[9],[15] $ 10,475,000  
Investment, Identifier [Axis]: Chartwell Cumming Holding, Corp. 3    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[8],[15] 0.22%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[8],[15] $ 14,038,000  
Investment, Identifier [Axis]: Chartwell Cumming Holding, Corp., Delayed Draw Term Loan 1    
Schedule of Investments [Line Items]    
Unfunded commitments 16,136,000  
Fair Value (81,000)  
Investment, Identifier [Axis]: Chartwell Cumming Holding, Corp., Delayed Draw Term Loan 2    
Schedule of Investments [Line Items]    
Unfunded commitments 1,629,000  
Fair Value 0  
Investment, Identifier [Axis]: Chartwell Cumming Holding, Corp., Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 18,271,000  
Fair Value $ 0  
Investment, Identifier [Axis]: Cisive Holdings Corp    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.13% [1],[2],[8],[9],[15] 0.14% [3],[4],[10],[11],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[11],[14] $ 8,252,000  
Ending balance 8,231,000 [1],[2],[8],[9],[15] $ 8,252,000 [3],[4],[10],[11],[14]
Investment, Identifier [Axis]: Cisive Holdings Corp, Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 1,111,000 1,111,000
Fair Value $ (22,000) $ (22,000)
Investment, Identifier [Axis]: Clearview Buyer, Inc.    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.12% [1],[2],[5],[8],[9] 0.12% [3],[4],[10],[11],[13],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[11],[13],[14] $ 7,276,000  
Ending balance 7,252,000 [1],[2],[5],[8],[9] $ 7,276,000 [3],[4],[10],[11],[13],[14]
Investment, Identifier [Axis]: Clearview Buyer, Inc., Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 898,000 898,000
Fair Value 0 $ 0
Investment, Identifier [Axis]: Color Intermediate, LLC    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[10],[14]   0.33%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[14] $ 19,958,000  
Ending balance [3],[4],[10],[14]   $ 19,958,000
Investment, Identifier [Axis]: Color Intermediate, LLC    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[5],[8] 0.32%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[5],[8] $ 19,908,000  
Investment, Identifier [Axis]: Community Management Holdings Midco 2 LLC 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.15% [1],[2],[5],[7],[8] 0.17% [3],[4],[10],[13],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[13],[14] $ 10,087,000  
Ending balance $ 9,577,000 [1],[2],[5],[7],[8] $ 10,087,000 [3],[4],[10],[13],[14]
Investment, Identifier [Axis]: Community Management Holdings Midco 2 LLC 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.01% [1],[2],[5],[7],[8],[9] 0.01% [3],[4],[10],[11],[13],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[11],[13],[14] $ 422,000  
Ending balance 337,000 [1],[2],[5],[7],[8],[9] $ 422,000 [3],[4],[10],[11],[13],[14]
Investment, Identifier [Axis]: Community Management Holdings Midco 2 LLC, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 4,096,000 4,096,000
Fair Value (31,000) (31,000)
Investment, Identifier [Axis]: Community Management Holdings Midco 2 LLC, Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 1,229,000 1,229,000
Fair Value $ 0 $ 0
Investment, Identifier [Axis]: Community Management Holdings Parent, LP - Series A Preferred Units    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.00% [1],[2],[8] 0.01% [3],[4],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[14] $ 310,000  
Ending balance 301,000 [1],[2],[8] $ 310,000 [3],[4],[14]
Investment, Identifier [Axis]: Compsych Investments Corp    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[10],[11],[13],[14]   0.20%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[11],[13],[14] $ 12,086,000  
Ending balance [3],[4],[10],[11],[13],[14]   $ 12,086,000
Investment, Identifier [Axis]: Compsych Investments Corp    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[5],[7],[8],[9] 0.19%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[5],[7],[8],[9] $ 12,085,000  
Investment, Identifier [Axis]: Compsych Investments Corp, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 3,471,000 3,471,000
Fair Value $ (9,000) $ (9,000)
Investment, Identifier [Axis]: Confine Visual Bidco 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.21% [1],[2],[6],[8],[17] 0.21% [3],[4],[12],[14],[18]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[12],[14],[18] $ 12,813,000  
Ending balance $ 12,813,000 [1],[2],[6],[8],[17] $ 12,813,000 [3],[4],[12],[14],[18]
Investment, Identifier [Axis]: Confine Visual Bidco 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.00% [1],[2],[6],[7],[8],[17] 0.01% [3],[4],[12],[13],[14],[18]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[12],[13],[14],[18] $ 306,000  
Ending balance $ 306,000 [1],[2],[6],[7],[8],[17] $ 306,000 [3],[4],[12],[13],[14],[18]
Investment, Identifier [Axis]: Confluence Technologies, Inc.    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[7],[8],[22] 0.03%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[7],[8],[22] $ 2,171,000  
Investment, Identifier [Axis]: Connatix Buyer, Inc. 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.34% [1],[2],[5],[8] 0.34% [3],[4],[10],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[14] $ 20,937,000  
Ending balance $ 20,988,000 [1],[2],[5],[8] $ 20,937,000 [3],[4],[10],[14]
Investment, Identifier [Axis]: Connatix Buyer, Inc. 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.02% [1],[2],[5],[7],[8],[9] 0.02% [3],[4],[10],[11],[13],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[11],[13],[14] $ 1,332,000  
Ending balance $ 1,005,000 [1],[2],[5],[7],[8],[9] $ 1,332,000 [3],[4],[10],[11],[13],[14]
Investment, Identifier [Axis]: Connatix Buyer, Inc. 3    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.02% [1],[2],[5],[7],[8],[9] 0.02% [3],[4],[10],[13],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[13],[14] $ 1,120,000  
Ending balance 1,275,000 [1],[2],[5],[7],[8],[9] $ 1,120,000 [3],[4],[10],[13],[14]
Investment, Identifier [Axis]: Connatix Buyer, Inc., Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 848,000 1,015,000
Fair Value 0 0
Investment, Identifier [Axis]: Connatix Buyer, Inc., Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 4,345,000 3,976,000
Fair Value $ 0 $ 0
Investment, Identifier [Axis]: Connatix Parent, LLC - Class L Common Units    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.00% [1],[2],[8] 0.00% [3],[4],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[14] $ 209,000  
Ending balance $ 209,000 [1],[2],[8] $ 209,000 [3],[4],[14]
Investment, Identifier [Axis]: Consor Intermediate II, LLC    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.08% [1],[2],[5],[7],[8],[9] 0.07% [3],[4],[10],[11],[13],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[11],[13],[14] $ 4,371,000  
Ending balance 5,160,000 [1],[2],[5],[7],[8],[9] $ 4,371,000 [3],[4],[10],[11],[13],[14]
Investment, Identifier [Axis]: Consor Intermediate II, LLC, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 3,218,000 4,002,000
Fair Value (16,000) (20,000)
Investment, Identifier [Axis]: Consor Intermediate II, LLC, Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 1,067,000 1,067,000
Fair Value 0 $ 0
Investment, Identifier [Axis]: Continental Buyer Inc    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[10],[11],[13],[14]   0.30%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[11],[13],[14] $ 18,360,000  
Ending balance [3],[4],[10],[11],[13],[14]   $ 18,360,000
Investment, Identifier [Axis]: Continental Buyer Inc, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments   7,239,000
Fair Value   (54,000)
Investment, Identifier [Axis]: Continental Buyer Inc, Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments   2,715,000
Fair Value   $ 0
Investment, Identifier [Axis]: Continental Buyer, Inc    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[5],[7],[8],[9] 0.41%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[5],[7],[8],[9] $ 25,603,000  
Investment, Identifier [Axis]: Continental Buyer, Inc., Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 11,599,000  
Fair Value (29,000)  
Investment, Identifier [Axis]: Continental Buyer, Inc., Revolver 1    
Schedule of Investments [Line Items]    
Unfunded commitments 2,715,000  
Fair Value 0  
Investment, Identifier [Axis]: Continental Buyer, Inc., Revolver 2    
Schedule of Investments [Line Items]    
Unfunded commitments 4,350,000  
Fair Value (22,000)  
Investment, Identifier [Axis]: Corfin Holdings, Inc.    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[10],[14]   4.35%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[14] $ 264,053,000  
Ending balance [3],[4],[10],[14]   $ 264,053,000
Investment, Identifier [Axis]: Corfin Holdings, Inc. 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[5],[8] 4.22%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[5],[8] $ 263,362,000  
Investment, Identifier [Axis]: Corfin Holdings, Inc. 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[5],[8] 0.03%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[5],[8] $ 1,576,000  
Investment, Identifier [Axis]: Corfin Holdings, Inc., Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments   1,636,000
Fair Value   $ 0
Investment, Identifier [Axis]: Coupa Software Inc.    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.03% [1],[2],[5],[6],[7],[8],[9] 0.03% [3],[4],[10],[11],[12],[13],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[11],[12],[13],[14] $ 1,825,000  
Ending balance 1,820,000 [1],[2],[5],[6],[7],[8],[9] $ 1,825,000 [3],[4],[10],[11],[12],[13],[14]
Investment, Identifier [Axis]: Coupa Software Inc., Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 164,000 164,000
Fair Value (2,000) (2,000)
Investment, Identifier [Axis]: Coupa Software Inc., Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 126,000 126,000
Fair Value $ 0 $ 0
Investment, Identifier [Axis]: Creek Parent Inc.    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 1.08% [1],[2],[5],[8],[9] 1.11% [3],[4],[10],[11],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[11],[14] $ 67,421,000  
Ending balance 67,421,000 [1],[2],[5],[8],[9] $ 67,421,000 [3],[4],[10],[11],[14]
Investment, Identifier [Axis]: Creek Parent Inc., Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 9,893,000 9,893,000
Fair Value $ (173,000) $ (173,000)
Investment, Identifier [Axis]: Crewline Buyer, Inc.    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.99% [1],[2],[8],[9],[15] 1.01% [3],[4],[11],[14],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[11],[14],[16] $ 61,615,000  
Ending balance 61,615,000 [1],[2],[8],[9],[15] $ 61,615,000 [3],[4],[11],[14],[16]
Investment, Identifier [Axis]: Crewline Buyer, Inc., Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 6,438,000 6,438,000
Fair Value (31,000) $ (31,000)
Investment, Identifier [Axis]: Cumming Group, Inc. 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[14],[16]   1.44%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[14],[16] 87,227,000  
Ending balance [3],[4],[14],[16]   $ 87,227,000
Investment, Identifier [Axis]: Cumming Group, Inc. 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[11],[13],[14],[16]   0.16%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[11],[13],[14],[16] $ 9,487,000  
Ending balance [3],[4],[11],[13],[14],[16]   $ 9,487,000
Investment, Identifier [Axis]: Cumming Group, Inc., Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments   3,161,000
Fair Value   0
Investment, Identifier [Axis]: Cumming Group, Inc., Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments   9,648,000
Fair Value   $ 0
Investment, Identifier [Axis]: CustomInk, LLC    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 2.62% [1],[2],[8],[15],[24] 2.69% [3],[4],[14],[16],[26]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[14],[16],[26] $ 163,594,000  
Ending balance $ 163,594,000 [1],[2],[8],[15],[24] $ 163,594,000 [3],[4],[14],[16],[26]
Investment, Identifier [Axis]: CustomInk, LLC - Series A Preferred Units    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.13% [1],[2],[8] 0.13% [3],[4],[29]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[29] $ 7,844,000  
Ending balance $ 7,844,000 [1],[2],[8] $ 7,844,000 [3],[4],[29]
Investment, Identifier [Axis]: DCA Investment Holdings, LLC 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.49% [1],[2],[5],[8] 0.52% [3],[4],[10],[11],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[11],[14] $ 31,506,000  
Ending balance $ 30,799,000 [1],[2],[5],[8] $ 31,506,000 [3],[4],[10],[11],[14]
Investment, Identifier [Axis]: DCA Investment Holdings, LLC 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.01% [1],[2],[5],[7],[8] 0.02% [3],[4],[10],[13],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[13],[14] $ 955,000  
Ending balance $ 933,000 [1],[2],[5],[7],[8] $ 955,000 [3],[4],[10],[13],[14]
Investment, Identifier [Axis]: DCA Investment Holdings, LLC, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments   29,000
Fair Value   $ 0
Investment, Identifier [Axis]: DCG Acquisition Corp.    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.56% [1],[2],[5],[8],[9] 0.58% [3],[4],[10],[11],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[11],[14] $ 35,327,000  
Ending balance 35,150,000 [1],[2],[5],[8],[9] $ 35,327,000 [3],[4],[10],[11],[14]
Investment, Identifier [Axis]: DCG Acquisition Corp., Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 5,937,000 5,937,000
Fair Value (30,000) (30,000)
Investment, Identifier [Axis]: DCG Acquisition Corp., Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 5,937,000 5,937,000
Fair Value (59,000) $ (59,000)
Investment, Identifier [Axis]: DM Intermediate Parent LLC    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[10],[11],[13],[14]   0.29%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[11],[13],[14] $ 17,811,000  
Ending balance [3],[4],[10],[11],[13],[14]   $ 17,811,000
Investment, Identifier [Axis]: DM Intermediate Parent LLC 3    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[5],[7],[8],[9] 0.29%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[5],[7],[8],[9] $ 17,948,000  
Investment, Identifier [Axis]: DM Intermediate Parent LLC, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 7,809,000 7,809,000
Fair Value (59,000) (59,000)
Investment, Identifier [Axis]: DM Intermediate Parent LLC, Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 5,206,000 5,206,000
Fair Value $ (78,000) $ (78,000)
Investment, Identifier [Axis]: DTA Intermediate II Ltd 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[8],[15] 0.67%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[8],[15] $ 42,006,000  
Investment, Identifier [Axis]: DTA Intermediate II Ltd 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[8],[9],[15] 0.08%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[8],[9],[15] $ 4,941,000  
Investment, Identifier [Axis]: DTA Intermediate II Ltd. 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[14],[27]   0.70%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[14],[27] 42,754,000  
Ending balance [3],[4],[14],[27]   $ 42,754,000
Investment, Identifier [Axis]: DTA Intermediate II Ltd. 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[11],[14],[16]   0.09%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[11],[14],[16] 5,196,000  
Ending balance [3],[4],[11],[14],[16]   $ 5,196,000
Investment, Identifier [Axis]: DTA Intermediate II Ltd., Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 14,000,000 14,000,000
Fair Value 0 0
Investment, Identifier [Axis]: DTA Intermediate II Ltd., Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 10,769,000 10,769,000
Fair Value $ (162,000) $ 0
Investment, Identifier [Axis]: DTA LP - Class A Common Units    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.03% [1],[2],[8] 0.04% [3],[4],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[14] $ 2,171,000  
Ending balance 1,845,000 [1],[2],[8] $ 2,171,000 [3],[4],[14]
Investment, Identifier [Axis]: Daylight Beta Parent, LLC (Benefytt Technologies, Inc.)    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[7],[13],[14],[18],[25],[26]   0.02%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[7],[13],[14],[18],[25],[26] $ 1,381,000  
Ending balance [3],[4],[7],[13],[14],[18],[25],[26]   $ 1,381,000
Investment, Identifier [Axis]: Daylight Beta Parent, LLC (Benefytt Technologies, Inc.)    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[7],[8],[17],[23],[24] 0.02%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[7],[8],[17],[23],[24] $ 1,453,000  
Investment, Identifier [Axis]: Dechra Pharmaceuticals Holdings Ltd 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[11],[12],[13],[14],[18]   0.02%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[11],[12],[13],[14],[18] 1,062,000  
Ending balance [3],[4],[11],[12],[13],[14],[18]   $ 1,062,000
Investment, Identifier [Axis]: Dechra Pharmaceuticals Holdings Ltd 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[10],[11],[12],[13],[14]   0.02%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[11],[12],[13],[14] $ 1,032,000  
Ending balance [3],[4],[10],[11],[12],[13],[14]   $ 1,032,000
Investment, Identifier [Axis]: Dechra Pharmaceuticals Holdings Ltd, Delayed Draw Term Loan 1    
Schedule of Investments [Line Items]    
Unfunded commitments   260,000
Fair Value   (3,000)
Investment, Identifier [Axis]: Dechra Pharmaceuticals Holdings Ltd, Delayed Draw Term Loan 2    
Schedule of Investments [Line Items]    
Unfunded commitments   218,000
Fair Value   $ (3,000)
Investment, Identifier [Axis]: Dellner Couplers Group AB    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.02% [1],[2],[6],[7],[17] 0.02% [3],[4],[12],[13],[18]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[12],[13],[18] $ 1,026,000  
Ending balance $ 1,085,000 [1],[2],[6],[7],[17] $ 1,026,000 [3],[4],[12],[13],[18]
Investment, Identifier [Axis]: Denali Bidco Ltd 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.08% [1],[2],[5],[6],[7],[8],[9] 0.08% [3],[4],[11],[12],[13],[14],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[11],[12],[13],[14],[16] $ 5,033,000  
Ending balance $ 5,193,000 [1],[2],[5],[6],[7],[8],[9] $ 5,033,000 [3],[4],[11],[12],[13],[14],[16]
Investment, Identifier [Axis]: Denali Bidco Ltd 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.02% [1],[2],[6],[7],[8],[17] 0.02% [3],[4],[12],[13],[14],[18]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[12],[13],[14],[18] $ 1,207,000  
Ending balance $ 1,260,000 [1],[2],[6],[7],[8],[17] $ 1,207,000 [3],[4],[12],[13],[14],[18]
Investment, Identifier [Axis]: Denali Bidco Ltd 3    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.00% [1],[2],[6],[7],[8],[17] 0.00% [3],[4],[12],[13],[14],[18]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[12],[13],[14],[18] $ 273,000  
Ending balance $ 285,000 [1],[2],[6],[7],[8],[17] $ 273,000 [3],[4],[12],[13],[14],[18]
Investment, Identifier [Axis]: Denali Bidco Ltd 4    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.03% [1],[2],[6],[7],[8],[17] 0.03% [3],[4],[12],[13],[14],[18]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[12],[13],[14],[18] $ 1,691,000  
Ending balance 1,765,000 [1],[2],[6],[7],[8],[17] $ 1,691,000 [3],[4],[12],[13],[14],[18]
Investment, Identifier [Axis]: Denali Bidco Ltd, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 300,000 300,000
Fair Value $ (3,000) $ (3,000)
Investment, Identifier [Axis]: Descartes Holdings, Inc - Class A Common Stock    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.00% [1],[2],[8] 0.00% [3],[4],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[14] $ 3,000  
Ending balance $ 2,000 [1],[2],[8] $ 3,000 [3],[4],[14]
Investment, Identifier [Axis]: Diligent Corp 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.80% [1],[2],[5],[8] 0.82% [3],[4],[10],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[14] $ 49,683,000  
Ending balance $ 49,683,000 [1],[2],[5],[8] $ 49,683,000 [3],[4],[10],[14]
Investment, Identifier [Axis]: Diligent Corp 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.14% [1],[2],[5],[8] 0.14% [3],[4],[10],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[14] $ 8,517,000  
Ending balance $ 8,517,000 [1],[2],[5],[8] $ 8,517,000 [3],[4],[10],[14]
Investment, Identifier [Axis]: Discovery Education, Inc. 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.45% [1],[2],[5],[8] 0.45% [3],[4],[10],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[14] $ 27,596,000  
Ending balance $ 27,980,000 [1],[2],[5],[8] $ 27,596,000 [3],[4],[10],[14]
Investment, Identifier [Axis]: Discovery Education, Inc. 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.04% [1],[2],[5],[7],[8] 0.03% [3],[4],[10],[11],[13],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[11],[13],[14] $ 1,726,000  
Ending balance $ 2,494,000 [1],[2],[5],[7],[8] $ 1,726,000 [3],[4],[10],[11],[13],[14]
Investment, Identifier [Axis]: Discovery Education, Inc. 3    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.05% [1],[2],[7],[8],[15] 0.05% [3],[4],[13],[14],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[13],[14],[16] $ 3,106,000  
Ending balance 3,149,000 [1],[2],[7],[8],[15] $ 3,106,000 [3],[4],[13],[14],[16]
Investment, Identifier [Axis]: Discovery Education, Inc., Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments   767,000
Fair Value   $ 0
Investment, Identifier [Axis]: Doc Generici (Diocle S.p.A.)    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[11],[12],[13],[14],[18]   0.03%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[11],[12],[13],[14],[18] $ 1,808,000  
Ending balance [3],[4],[11],[12],[13],[14],[18]   $ 1,808,000
Investment, Identifier [Axis]: Doc Generici (Diocle S.p.A.), Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments   1,682,000
Fair Value   $ (13,000)
Investment, Identifier [Axis]: Doit International Ltd    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[7],[8],[9],[15] 0.27%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[7],[8],[9],[15] $ 17,060,000  
Investment, Identifier [Axis]: Doit International Ltd, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 11,606,000  
Fair Value $ (87,000)  
Investment, Identifier [Axis]: Dolcetto Holdco SpA 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[6],[7],[8],[17] 0.03%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[6],[7],[8],[17] $ 1,901,000  
Investment, Identifier [Axis]: Dolcetto Holdco SpA 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[6],[7],[8],[17] 0.03%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[6],[7],[8],[17] $ 1,897,000  
Investment, Identifier [Axis]: Dropbox Inc 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[10],[12],[13],[14]   0.43%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[12],[13],[14] 26,150,000  
Ending balance [3],[4],[10],[12],[13],[14]   $ 26,150,000
Investment, Identifier [Axis]: Dropbox Inc 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[10],[11],[12],[13],[14],[26]   0.57%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[11],[12],[13],[14],[26] $ 34,426,000  
Ending balance [3],[4],[10],[11],[12],[13],[14],[26]   $ 34,426,000
Investment, Identifier [Axis]: Dropbox Inc, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments   88,235,000
Fair Value   $ (441,000)
Investment, Identifier [Axis]: Dropbox, Inc.    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[5],[6],[7],[8],[9],[24] 0.55%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[5],[6],[7],[8],[9],[24] $ 34,413,000  
Investment, Identifier [Axis]: Dropbox, Inc., Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 88,235,000  
Fair Value (441,000)  
Investment, Identifier [Axis]: Duro Dyne National Corp    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[10],[11],[14]   0.55%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[11],[14] $ 33,185,000  
Ending balance [3],[4],[10],[11],[14]   $ 33,185,000
Investment, Identifier [Axis]: Duro Dyne National Corp    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[5],[8],[9] 0.53%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[5],[8],[9] $ 33,290,000  
Investment, Identifier [Axis]: Duro Dyne National Corp, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 6,002,000 6,002,000
Fair Value (30,000) (30,000)
Investment, Identifier [Axis]: Duro Dyne National Corp, Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 6,002,000 6,002,000
Fair Value $ (60,000) $ (60,000)
Investment, Identifier [Axis]: Dwyer Instruments LLC    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[5],[7],[8],[9] 0.13%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[5],[7],[8],[9] $ 8,165,000  
Investment, Identifier [Axis]: Dwyer Instruments LLC 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[10],[13],[14]   0.13%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[13],[14] 8,150,000  
Ending balance [3],[4],[10],[13],[14]   $ 8,150,000
Investment, Identifier [Axis]: Dwyer Instruments LLC 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[10],[11],[13],[14]   0.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[11],[13],[14] 167,000  
Ending balance [3],[4],[10],[11],[13],[14]   $ 167,000
Investment, Identifier [Axis]: Dwyer Instruments LLC, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 1,069,000 1,069,000
Fair Value (5,000) (5,000)
Investment, Identifier [Axis]: Dwyer Instruments LLC, Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 1,209,000 1,098,000
Fair Value $ 0 $ 0
Investment, Identifier [Axis]: EIS Acquisition Holdings, LP - Class A Common Units    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.12% [1],[2],[8] 0.14% [3],[4],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[14] $ 8,752,000  
Ending balance $ 7,434,000 [1],[2],[8] $ 8,752,000 [3],[4],[14]
Investment, Identifier [Axis]: EMB Purchaser, Inc. 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[5],[8] 0.44%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[5],[8] $ 27,178,000  
Investment, Identifier [Axis]: EMB Purchaser, Inc. 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[5],[7],[8],[9] 0.00%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[5],[7],[8],[9] $ 243,000  
Investment, Identifier [Axis]: EMB Purchaser, Inc., Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 16,111,000  
Fair Value 0  
Investment, Identifier [Axis]: EMB Purchaser, Inc., Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 3,294,000  
Fair Value $ (33,000)  
Investment, Identifier [Axis]: ENV Bidco AB 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.02% [1],[2],[5],[6],[7],[8] 0.02% [3],[4],[10],[12],[13],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[12],[13],[14] $ 1,115,000  
Ending balance $ 1,115,000 [1],[2],[5],[6],[7],[8] $ 1,115,000 [3],[4],[10],[12],[13],[14]
Investment, Identifier [Axis]: ENV Bidco AB 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.02% [1],[2],[6],[7],[8],[9],[17] 0.02% [3],[4],[11],[12],[13],[14],[18]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[11],[12],[13],[14],[18] $ 1,381,000  
Ending balance 1,442,000 [1],[2],[6],[7],[8],[9],[17] $ 1,381,000 [3],[4],[11],[12],[13],[14],[18]
Investment, Identifier [Axis]: ENV Bidco AB, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 302,000 302,000
Fair Value $ (4,000) $ 0
Investment, Identifier [Axis]: Eagle Midstream Canada Finance Inc    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.79% [1],[2],[5],[6],[8] 0.81% [3],[4],[10],[12],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[12],[14] $ 49,396,000  
Ending balance $ 49,396,000 [1],[2],[5],[6],[8] $ 49,396,000 [3],[4],[10],[12],[14]
Investment, Identifier [Axis]: East River Bidco Gmbh    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[6],[8],[9],[17] 0.00%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[6],[8],[9],[17] $ 96,000  
Investment, Identifier [Axis]: East River Bidco Gmbh, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 39,000  
Fair Value $ 0  
Investment, Identifier [Axis]: Eden Acquisitionco Ltd    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.55% [1],[2],[5],[6],[8],[9] 0.33% [3],[4],[10],[11],[12],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[11],[12],[14] $ 19,787,000  
Ending balance 34,041,000 [1],[2],[5],[6],[8],[9] $ 19,787,000 [3],[4],[10],[11],[12],[14]
Investment, Identifier [Axis]: Eden Acquisitionco Ltd, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 29,680,000 43,344,000
Fair Value (444,000) $ (601,000)
Investment, Identifier [Axis]: Edifecs, Inc. 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[10],[14]   0.22%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[14] 13,572,000  
Ending balance [3],[4],[10],[14]   $ 13,572,000
Investment, Identifier [Axis]: Edifecs, Inc. 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[14],[16]   3.60%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[14],[16] $ 218,935,000  
Ending balance [3],[4],[14],[16]   $ 218,935,000
Investment, Identifier [Axis]: Edison Bidco AS    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.01% [1],[2],[6],[7],[8],[9],[17] 0.01% [3],[4],[11],[12],[13],[14],[18]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[11],[12],[13],[14],[18] $ 342,000  
Ending balance 315,000 [1],[2],[6],[7],[8],[9],[17] $ 342,000 [3],[4],[11],[12],[13],[14],[18]
Investment, Identifier [Axis]: Edison Bidco AS, Delayed Draw Term Loan 1    
Schedule of Investments [Line Items]    
Unfunded commitments 687,000 655,000
Fair Value 0 0
Investment, Identifier [Axis]: Edison Bidco AS, Delayed Draw Term Loan 2    
Schedule of Investments [Line Items]    
Unfunded commitments 3,161,000 1,875,000
Fair Value $ 0 $ 0
Investment, Identifier [Axis]: Elanco Animal Health, Inc.    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[6],[7],[17] 0.02%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[6],[7],[17] $ 995,000  
Investment, Identifier [Axis]: Elements Finco Ltd 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.08% [1],[2],[6],[7],[8],[17] 0.08% [3],[4],[12],[13],[14],[18]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[12],[13],[14],[18] $ 5,008,000  
Ending balance $ 5,008,000 [1],[2],[6],[7],[8],[17] $ 5,008,000 [3],[4],[12],[13],[14],[18]
Investment, Identifier [Axis]: Elements Finco Ltd 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.40% [1],[2],[6],[7],[8],[17] 0.40% [3],[4],[12],[13],[14],[18]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[12],[13],[14],[18] $ 24,065,000  
Ending balance $ 25,016,000 [1],[2],[6],[7],[8],[17] $ 24,065,000 [3],[4],[12],[13],[14],[18]
Investment, Identifier [Axis]: Elements Finco Ltd 3    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.10% [1],[2],[6],[7],[8],[17] 0.10% [3],[4],[12],[13],[14],[18]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[12],[13],[14],[18] $ 6,017,000  
Ending balance $ 6,055,000 [1],[2],[6],[7],[8],[17] $ 6,017,000 [3],[4],[12],[13],[14],[18]
Investment, Identifier [Axis]: Elements Finco Ltd 4    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.18% [1],[2],[6],[7],[8],[17] 0.18% [3],[4],[12],[13],[14],[18]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[12],[13],[14],[18] $ 10,788,000  
Ending balance $ 11,214,000 [1],[2],[6],[7],[8],[17] $ 10,788,000 [3],[4],[12],[13],[14],[18]
Investment, Identifier [Axis]: Elements Finco Ltd 5    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.07% [1],[2],[6],[7],[8],[17] 0.07% [3],[4],[12],[13],[14],[18]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[12],[13],[14],[18] $ 4,436,000  
Ending balance 4,611,000 [1],[2],[6],[7],[8],[17] $ 4,436,000 [3],[4],[12],[13],[14],[18]
Investment, Identifier [Axis]: Emergency Power Holdings, LLC    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[11],[14],[16]   0.75%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[11],[14],[16] $ 45,809,000  
Ending balance [3],[4],[11],[14],[16]   $ 45,809,000
Investment, Identifier [Axis]: Emergency Power Holdings, LLC    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[8],[9],[15] 0.73%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[8],[9],[15] $ 45,795,000  
Investment, Identifier [Axis]: Emergency Power Holdings, LLC, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 14,586,000 14,586,000
Fair Value $ (146,000) $ (146,000)
Investment, Identifier [Axis]: Endeavor Schools Holdings, LLC 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.33% [1],[2],[8],[15] 0.35% [3],[4],[14],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[14],[16] $ 21,413,000  
Ending balance $ 20,588,000 [1],[2],[8],[15] $ 21,413,000 [3],[4],[14],[16]
Investment, Identifier [Axis]: Endeavor Schools Holdings, LLC 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.06% [1],[2],[7],[8],[15] 0.06% [3],[4],[11],[13],[14],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[11],[13],[14],[16] $ 3,885,000  
Ending balance $ 3,778,000 [1],[2],[7],[8],[15] $ 3,885,000 [3],[4],[11],[13],[14],[16]
Investment, Identifier [Axis]: Endeavor Schools Holdings, LLC, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments   5,776,000
Fair Value   $ 0
Investment, Identifier [Axis]: Epoch Acquisition, Inc    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[8],[15] 0.38%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[8],[15] $ 23,801,000  
Investment, Identifier [Axis]: Epoch Acquisition, Inc.    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[14],[16]   0.39%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[14],[16] 23,807,000  
Ending balance [3],[4],[14],[16]   $ 23,807,000
Investment, Identifier [Axis]: Essential Services Holding Corp    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[10],[11],[13],[14]   0.19%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[11],[13],[14] $ 11,687,000  
Ending balance [3],[4],[10],[11],[13],[14]   $ 11,687,000
Investment, Identifier [Axis]: Essential Services Holding Corp 3    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[5],[7],[8],[9] 0.19%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[5],[7],[8],[9] $ 11,935,000  
Investment, Identifier [Axis]: Essential Services Holding Corp, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 2,297,000 2,297,000
Fair Value (11,000) (11,000)
Investment, Identifier [Axis]: Essential Services Holding Corp, Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 1,206,000 1,436,000
Fair Value $ 0 $ (14,000)
Investment, Identifier [Axis]: Everbridge Holdings, LLC 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.35% [1],[2],[5],[6],[8] 0.36% [3],[4],[10],[12],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[12],[14] $ 22,167,000  
Ending balance $ 22,111,000 [1],[2],[5],[6],[8] $ 22,167,000 [3],[4],[10],[12],[14]
Investment, Identifier [Axis]: Everbridge Holdings, LLC 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.03% [1],[2],[5],[6],[7],[8],[9] 0.04% [3],[4],[10],[11],[12],[13],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[11],[12],[13],[14] $ 2,158,000  
Ending balance 2,147,000 [1],[2],[5],[6],[7],[8],[9] $ 2,158,000 [3],[4],[10],[11],[12],[13],[14]
Investment, Identifier [Axis]: Everbridge Holdings, LLC, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 3,378,000 3,378,000
Fair Value 0 0
Investment, Identifier [Axis]: Everbridge Holdings, LLC, Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 2,222,000 2,222,000
Fair Value $ (6,000) $ (6,000)
Investment, Identifier [Axis]: Expedition Holdco, LLC - Class A Common Units    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.00% [1],[2],[8] 0.00% [3],[4],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[14] $ 48,000  
Ending balance $ 48,000 [1],[2],[8] $ 48,000 [3],[4],[14]
Investment, Identifier [Axis]: Expedition Holdco, LLC - Class B Common Units    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[8] 0.00%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[8] $ 14,000  
Investment, Identifier [Axis]: Expedition Holdco, LLC - Class B Units    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[14]   0.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[14] $ 14,000  
Ending balance [3],[4],[14]   $ 14,000
Investment, Identifier [Axis]: Experity, Inc. 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.19% [1],[2],[5],[8] 0.19% [3],[4],[10],[13],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[13],[14] $ 11,845,000  
Ending balance $ 11,957,000 [1],[2],[5],[8] $ 11,845,000 [3],[4],[10],[13],[14]
Investment, Identifier [Axis]: Experity, Inc. 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.06% [1],[2],[5],[7],[8],[9] 0.06% [3],[4],[10],[13],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[13],[14] $ 3,785,000  
Ending balance 3,825,000 [1],[2],[5],[7],[8],[9] $ 3,785,000 [3],[4],[10],[13],[14]
Investment, Identifier [Axis]: Experity, Inc. 3    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[10],[11],[13],[14]   0.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[11],[13],[14] 234,000  
Ending balance [3],[4],[10],[11],[13],[14]   $ 234,000
Investment, Identifier [Axis]: Experity, Inc., Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 4,457,000 4,457,000
Fair Value (22,000) (22,000)
Investment, Identifier [Axis]: Experity, Inc., Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 1,495,000 1,238,000
Fair Value 0 $ 0
Investment, Identifier [Axis]: Falcon Parent Holdings, Inc.    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[10],[11],[13],[14]   0.23%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[11],[13],[14] $ 14,252,000  
Ending balance [3],[4],[10],[11],[13],[14]   $ 14,252,000
Investment, Identifier [Axis]: Falcon Parent Holdings, Inc. 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[5],[7],[8],[9] 0.30%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[5],[7],[8],[9] $ 18,784,000  
Investment, Identifier [Axis]: Falcon Parent Holdings, Inc. 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[5],[7],[8],[9] 0.05%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[5],[7],[8],[9] $ 3,125,000  
Investment, Identifier [Axis]: Falcon Parent Holdings, Inc., Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 2,239,000 4,470,000
Fair Value 0 (34,000)
Investment, Identifier [Axis]: Falcon Parent Holdings, Inc., Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 2,669,000 2,669,000
Fair Value $ (40,000) $ (40,000)
Investment, Identifier [Axis]: Falcon Top Parent, LLC - Class A Common Units    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.01% [1],[2],[8] 0.01% [3],[4],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[14] $ 773,000  
Ending balance $ 773,000 [1],[2],[8] $ 773,000 [3],[4],[14]
Investment, Identifier [Axis]: Fastener Distribution Holdings LLC    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.49% [1],[2],[5],[8],[9] 0.50% [3],[4],[10],[11],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[11],[14] $ 30,647,000  
Ending balance 30,725,000 [1],[2],[5],[8],[9] $ 30,647,000 [3],[4],[10],[11],[14]
Investment, Identifier [Axis]: Fastener Distribution Holdings LLC, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 11,594,000 11,594,000
Fair Value $ (58,000) $ (58,000)
Investment, Identifier [Axis]: Fencing Supply Group Acquisition, LLC    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.82% [1],[2],[8],[15] 0.85% [3],[4],[14],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[14],[16] $ 51,688,000  
Ending balance $ 50,893,000 [1],[2],[8],[15] $ 51,688,000 [3],[4],[14],[16]
Investment, Identifier [Axis]: Fern Bidco Ltd 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.41% [1],[2],[6],[7],[8],[17] 0.41% [3],[4],[12],[13],[14],[18]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[12],[13],[14],[18] $ 25,117,000  
Ending balance $ 25,786,000 [1],[2],[6],[7],[8],[17] $ 25,117,000 [3],[4],[12],[13],[14],[18]
Investment, Identifier [Axis]: Fern Bidco Ltd 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.04% [1],[2],[6],[7],[8],[9],[17] 0.04% [3],[4],[11],[12],[13],[14],[18]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[11],[12],[13],[14],[18] $ 2,623,000  
Ending balance 2,641,000 [1],[2],[6],[7],[8],[9],[17] $ 2,623,000 [3],[4],[11],[12],[13],[14],[18]
Investment, Identifier [Axis]: Fern Bidco Ltd, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 10,035,000 10,035,000
Fair Value $ 0 $ 0
Investment, Identifier [Axis]: Formulations Parent Corp.    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.13% [1],[2],[5],[8],[9] 0.14% [3],[4],[10],[11],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[11],[14] $ 8,408,000  
Ending balance 8,387,000 [1],[2],[5],[8],[9] $ 8,408,000 [3],[4],[10],[11],[14]
Investment, Identifier [Axis]: Formulations Parent Corp., Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 1,429,000 1,429,000
Fair Value $ (14,000) $ (14,000)
Investment, Identifier [Axis]: Foundation Risk Partners Corp 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[5],[8] 0.23%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[5],[8] $ 14,398,000  
Investment, Identifier [Axis]: Foundation Risk Partners Corp 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[5],[8] 0.08%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[5],[8] $ 4,772,000  
Investment, Identifier [Axis]: Foundation Risk Partners Corp 3    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[5],[8] 0.11%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[5],[8] $ 6,874,000  
Investment, Identifier [Axis]: Foundation Risk Partners Corp 4    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[5],[7],[8],[9] 0.06%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[5],[7],[8],[9] $ 3,504,000  
Investment, Identifier [Axis]: Foundation Risk Partners Corp. 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[10],[14]   0.24%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[14] 14,433,000  
Ending balance [3],[4],[10],[14]   $ 14,433,000
Investment, Identifier [Axis]: Foundation Risk Partners Corp. 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[10],[14]   0.08%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[14] 4,785,000  
Ending balance [3],[4],[10],[14]   $ 4,785,000
Investment, Identifier [Axis]: Foundation Risk Partners Corp. 3    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[10],[14]   0.11%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[14] 6,892,000  
Ending balance [3],[4],[10],[14]   $ 6,892,000
Investment, Identifier [Axis]: Foundation Risk Partners Corp. 4    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[10],[11],[13],[14]   0.04%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[11],[13],[14] 2,275,000  
Ending balance [3],[4],[10],[11],[13],[14]   $ 2,275,000
Investment, Identifier [Axis]: Foundation Risk Partners Corp., Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments   2,245,000
Fair Value   0
Investment, Identifier [Axis]: Foundation Risk Partners Corp., Delayed Draw Term Loan 1    
Schedule of Investments [Line Items]    
Unfunded commitments 985,000  
Fair Value 0  
Investment, Identifier [Axis]: Foundation Risk Partners Corp., Delayed Draw Term Loan 2    
Schedule of Investments [Line Items]    
Unfunded commitments 7,140,000  
Fair Value 0  
Investment, Identifier [Axis]: Foundation Risk Partners Corp., Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 4,101,000 4,101,000
Fair Value (62,000) $ (62,000)
Investment, Identifier [Axis]: Frontgrade Technologies Holdings, Inc.    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[10],[11],[13],[14]   0.04%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[11],[13],[14] $ 2,347,000  
Ending balance [3],[4],[10],[11],[13],[14]   $ 2,347,000
Investment, Identifier [Axis]: Frontgrade Technologies Holdings, Inc. 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[5],[7],[8],[9] 0.04%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[5],[7],[8],[9] $ 2,341,000  
Investment, Identifier [Axis]: Frontgrade Technologies Holdings, Inc. 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[5],[7],[8] 0.01%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[5],[7],[8] $ 355,000  
Investment, Identifier [Axis]: Frontgrade Technologies Holdings, Inc., Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 516,000 516,000
Fair Value 0 $ 0
Investment, Identifier [Axis]: Frontline Road Safety Investments, LLC - Class A Common Units    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[14]   0.12%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[14] $ 7,460,000  
Ending balance [3],[4],[14]   $ 7,460,000
Investment, Identifier [Axis]: Frontline Road Safety, LLC 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.24% [1],[2],[8],[17] 1.54% [3],[4],[10],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[14] $ 93,849,000  
Ending balance $ 14,862,000 [1],[2],[8],[17] $ 93,849,000 [3],[4],[10],[14]
Investment, Identifier [Axis]: Frontline Road Safety, LLC 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.00% [1],[2],[7],[8],[9],[17] 0.18% [3],[4],[10],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[14] $ 10,969,000  
Ending balance 32,000 [1],[2],[7],[8],[9],[17] $ 10,969,000 [3],[4],[10],[14]
Investment, Identifier [Axis]: Frontline Road Safety, LLC 3    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[10],[11],[14]   0.18%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[11],[14] 10,919,000  
Ending balance [3],[4],[10],[11],[14]   $ 10,919,000
Investment, Identifier [Axis]: Frontline Road Safety, LLC, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 4,329,000 33,000
Fair Value 0 $ 0
Investment, Identifier [Axis]: Frontline Road Safety, LLC, Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 2,565,000  
Fair Value $ (26,000)  
Investment, Identifier [Axis]: FusionSite Midco, LLC 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.41% [1],[2],[8],[15] 0.42% [3],[4],[14],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[14],[16] $ 25,721,000  
Ending balance $ 25,656,000 [1],[2],[8],[15] $ 25,721,000 [3],[4],[14],[16]
Investment, Identifier [Axis]: FusionSite Midco, LLC 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.18% [1],[2],[8],[15] 0.18% [3],[4],[14],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[14],[16] $ 11,124,000  
Ending balance $ 11,096,000 [1],[2],[8],[15] $ 11,124,000 [3],[4],[14],[16]
Investment, Identifier [Axis]: FusionSite Midco, LLC 3    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.34% [1],[2],[7],[8],[9],[15] 0.33% [3],[4],[11],[13],[14],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[11],[13],[14],[16] $ 19,889,000  
Ending balance 21,125,000 [1],[2],[7],[8],[9],[15] $ 19,889,000 [3],[4],[11],[13],[14],[16]
Investment, Identifier [Axis]: FusionSite Midco, LLC, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments   1,276,000
Fair Value   0
Investment, Identifier [Axis]: FusionSite Midco, LLC, Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 4,209,000 4,209,000
Fair Value $ (95,000) $ (95,000)
Investment, Identifier [Axis]: G&A Partners Holding Company II, LLC 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.48% [1],[2],[8],[22] 0.50% [3],[4],[14],[28]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[14],[28] $ 30,095,000  
Ending balance $ 30,020,000 [1],[2],[8],[22] $ 30,095,000 [3],[4],[14],[28]
Investment, Identifier [Axis]: G&A Partners Holding Company II, LLC 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.06% [1],[2],[7],[8],[9],[22] 0.02% [3],[4],[11],[13],[14],[28]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[11],[13],[14],[28] $ 1,058,000  
Ending balance 3,542,000 [1],[2],[7],[8],[9],[22] $ 1,058,000 [3],[4],[11],[13],[14],[28]
Investment, Identifier [Axis]: G&A Partners Holding Company II, LLC, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 9,468,000 11,967,000
Fair Value 0 0
Investment, Identifier [Axis]: G&A Partners Holding Company II, LLC, Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 3,288,000 3,288,000
Fair Value $ 0 $ 0
Investment, Identifier [Axis]: GCX Corporation Buyer, LLC 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.33% [1],[2],[5],[8] 0.35% [3],[4],[10],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[14] $ 20,966,000  
Ending balance $ 20,699,000 [1],[2],[5],[8] $ 20,966,000 [3],[4],[10],[14]
Investment, Identifier [Axis]: GCX Corporation Buyer, LLC 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.08% [1],[2],[5],[8] 0.09% [3],[4],[10],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[14] $ 5,309,000  
Ending balance $ 5,242,000 [1],[2],[5],[8] $ 5,309,000 [3],[4],[10],[14]
Investment, Identifier [Axis]: GCX Corporation Group Holdings, L.P. - Class A-2 Units    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.00% [1],[2],[8] 0.00% [3],[4],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[14] $ 291,000  
Ending balance $ 270,000 [1],[2],[8] $ 291,000 [3],[4],[14]
Investment, Identifier [Axis]: GI Ranger Intermediate, LLC    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[5],[8],[9] 0.26%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[5],[8],[9] $ 16,259,000  
Investment, Identifier [Axis]: GI Ranger Intermediate, LLC 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[10],[11],[14]   0.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[11],[14] 134,000  
Ending balance [3],[4],[10],[11],[14]   $ 134,000
Investment, Identifier [Axis]: GI Ranger Intermediate, LLC 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[10],[11],[14]   0.27%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[11],[14] 16,220,000  
Ending balance [3],[4],[10],[11],[14]   $ 16,220,000
Investment, Identifier [Axis]: GI Ranger Intermediate, LLC, Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 1,200,000 1,060,000
Fair Value $ 0 $ 0
Investment, Identifier [Axis]: GS Acquisitionco Inc 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.01% [1],[2],[5],[7],[8],[9] 0.01% [3],[4],[10],[11],[13],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[11],[13],[14] $ 577,000  
Ending balance $ 566,000 [1],[2],[5],[7],[8],[9] $ 577,000 [3],[4],[10],[11],[13],[14]
Investment, Identifier [Axis]: GS Acquisitionco Inc 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.08% [1],[2],[7],[8],[15] 0.09% [3],[4],[11],[13],[14],[28]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[11],[13],[14],[28] $ 5,295,000  
Ending balance 5,291,000 [1],[2],[7],[8],[15] $ 5,295,000 [3],[4],[11],[13],[14],[28]
Investment, Identifier [Axis]: GS Acquisitionco Inc, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 2,053,000 2,053,000
Fair Value 0 0
Investment, Identifier [Axis]: GS Acquisitionco Inc, Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 2,000,000 2,000,000
Fair Value $ (10,000) $ (10,000)
Investment, Identifier [Axis]: GTCR Investors LP - Class A-1 Common Units    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.01% [1],[2],[8] 0.01% [3],[4],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[14] $ 465,000  
Ending balance $ 465,000 [1],[2],[8] $ 465,000 [3],[4],[14]
Investment, Identifier [Axis]: GTCR/Jupiter Blocker, LLC - Blocker Note    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[8] 0.00%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[8] $ 7,000  
Investment, Identifier [Axis]: GTCR/Jupiter Blocker, LLC - Blocker Notes    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[14]   0.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[14] $ 6,000  
Ending balance [3],[4],[14]   $ 6,000
Investment, Identifier [Axis]: GTCR/Jupiter Blocker, LLC - Class Z Units    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.00% [1],[2],[8] 0.00% [3],[4],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[14] $ 57,000  
Ending balance 57,000 [1],[2],[8] $ 57,000 [3],[4],[14]
Investment, Identifier [Axis]: Galway Borrower, LLC 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[10],[13],[14]   0.24%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[13],[14] $ 14,788,000  
Ending balance [3],[4],[10],[13],[14]   $ 14,788,000
Investment, Identifier [Axis]: Galway Borrower, LLC 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.04% [1],[2],[5],[7],[8],[9] 0.01% [3],[4],[10],[11],[13],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[11],[13],[14] $ 834,000  
Ending balance $ 2,736,000 [1],[2],[5],[7],[8],[9] $ 834,000 [3],[4],[10],[11],[13],[14]
Investment, Identifier [Axis]: Galway Borrower, LLC 3    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.05% [1],[2],[5],[7],[8],[9] 0.01% [3],[4],[10],[11],[13],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[11],[13],[14] $ 691,000  
Ending balance 3,049,000 [1],[2],[5],[7],[8],[9] $ 691,000 [3],[4],[10],[11],[13],[14]
Investment, Identifier [Axis]: Galway Borrower, LLC, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 50,131,000 52,181,000
Fair Value 0 0
Investment, Identifier [Axis]: Galway Borrower, LLC, Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 6,126,000 8,341,000
Fair Value $ 0 $ 0
Investment, Identifier [Axis]: Galway Borrower, LLC1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[5],[7],[8] 0.24%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[5],[7],[8] $ 14,746,000  
Investment, Identifier [Axis]: Gannett Fleming Inc    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 1.03% [1],[2],[5],[8],[9] 1.01% [3],[4],[10],[11],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[11],[14] $ 61,655,000  
Ending balance 64,357,000 [1],[2],[5],[8],[9] $ 61,655,000 [3],[4],[10],[11],[14]
Investment, Identifier [Axis]: Gannett Fleming Inc, Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 6,237,000 6,237,000
Fair Value $ (94,000) (94,000)
Investment, Identifier [Axis]: Gatekeeper Systems Inc, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments   10,584,000
Fair Value   (106,000)
Investment, Identifier [Axis]: Gatekeeper Systems Inc, Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments   1,588,000
Fair Value   $ 0
Investment, Identifier [Axis]: Gatekeeper Systems, Inc. 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.71% [1],[2],[5],[8] 0.73% [3],[4],[10],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[14] $ 44,114,000  
Ending balance $ 44,004,000 [1],[2],[5],[8] $ 44,114,000 [3],[4],[10],[14]
Investment, Identifier [Axis]: Gatekeeper Systems, Inc. 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.08% [1],[2],[5],[7],[8],[9] 0.02% [3],[4],[10],[11],[13],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[11],[13],[14] $ 1,458,000  
Ending balance 4,832,000 [1],[2],[5],[7],[8],[9] $ 1,458,000 [3],[4],[10],[11],[13],[14]
Investment, Identifier [Axis]: Gatekeeper Systems, Inc., Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 7,218,000  
Fair Value 0  
Investment, Identifier [Axis]: Gatekeeper Systems, Inc., Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 1,588,000  
Fair Value $ 0  
Investment, Identifier [Axis]: Genstar Neptune Blocker, LLC - Blocker Note    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.00% [1],[2],[8] 0.00% [3],[4],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[14] $ 9,000  
Ending balance $ 9,000 [1],[2],[8] $ 9,000 [3],[4],[14]
Investment, Identifier [Axis]: Genstar Neptune Blocker, LLC - Blocker Units    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.01% [1],[2],[8] 0.01% [3],[4],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[14] $ 336,000  
Ending balance $ 336,000 [1],[2],[8] $ 336,000 [3],[4],[14]
Investment, Identifier [Axis]: Genstar Neptune Blocker, LLC - Class Z Units    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.00% [1],[2],[8] 0.00% [3],[4],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[14] $ 79,000  
Ending balance 79,000 [1],[2],[8] $ 79,000 [3],[4],[14]
Investment, Identifier [Axis]: Genuine Cable Group, LLC    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[10],[14]   2.60%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[14] $ 158,176,000  
Ending balance [3],[4],[10],[14]   $ 158,176,000
Investment, Identifier [Axis]: Genuine Cable Group, LLC    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[5],[8] 2.50%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[5],[8] $ 156,107,000  
Investment, Identifier [Axis]: Gigamon Inc. 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.11% [1],[2],[5],[8] 0.11% [3],[4],[14],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[14],[16] $ 6,798,000  
Ending balance $ 6,780,000 [1],[2],[5],[8] $ 6,798,000 [3],[4],[14],[16]
Investment, Identifier [Axis]: Gigamon Inc. 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.00% [1],[2],[5],[7],[8],[9] 0.01% [3],[4],[10],[13],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[13],[14] $ 410,000  
Ending balance 104,000 [1],[2],[5],[7],[8],[9] $ 410,000 [3],[4],[10],[13],[14]
Investment, Identifier [Axis]: Gigamon Inc., Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 306,000  
Fair Value $ 0  
Investment, Identifier [Axis]: Gimlet Bidco GmbH 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.53% [1],[2],[6],[8],[17] 0.51% [3],[4],[12],[14],[18]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[12],[14],[18] $ 31,242,000  
Ending balance $ 32,779,000 [1],[2],[6],[8],[17] $ 31,242,000 [3],[4],[12],[14],[18]
Investment, Identifier [Axis]: Gimlet Bidco GmbH 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.10% [1],[2],[8] 0.08% [3],[4],[11],[12],[14],[18]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[11],[12],[14],[18] $ 4,946,000  
Ending balance 5,980,000 [1],[2],[8] $ 4,946,000 [3],[4],[11],[12],[14],[18]
Investment, Identifier [Axis]: Gimlet Bidco GmbH, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 7,299,000 8,040,000
Fair Value $ 0 $ 0
Investment, Identifier [Axis]: Go Car Wash Management Corp    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[8],[15] 0.35%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[8],[15] $ 21,661,000  
Investment, Identifier [Axis]: Go Car Wash Management Corp.    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[14],[16]   0.36%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[14],[16] $ 21,717,000  
Ending balance [3],[4],[14],[16]   $ 21,717,000
Investment, Identifier [Axis]: Gorilla Investor LLC    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.39% [1],[2],[5],[8] 0.41% [3],[4],[10],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[14] $ 24,695,000  
Ending balance $ 24,557,000 [1],[2],[5],[8] $ 24,695,000 [3],[4],[10],[14]
Investment, Identifier [Axis]: GovernmentJobs.com, Inc.    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.13% [1],[2],[5],[8],[9] 0.14% [3],[4],[10],[11],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[11],[14] $ 8,447,000  
Ending balance 8,425,000 [1],[2],[5],[8],[9] $ 8,447,000 [3],[4],[10],[11],[14]
Investment, Identifier [Axis]: GovernmentJobs.com, Inc., Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 2,086,000 2,086,000
Fair Value 0 0
Investment, Identifier [Axis]: GovernmentJobs.com, Inc., Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 1,153,000 1,153,000
Fair Value $ (18,000) $ (18,000)
Investment, Identifier [Axis]: Granicus Inc. 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.28% [1],[2],[5],[8] 0.29% [3],[4],[10],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[14] $ 17,509,000  
Ending balance $ 17,565,000 [1],[2],[5],[8] $ 17,509,000 [3],[4],[10],[14]
Investment, Identifier [Axis]: Granicus Inc. 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.08% [1],[2],[5],[8],[9] 0.08% [3],[4],[10],[11],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[11],[14] $ 4,665,000  
Ending balance 4,722,000 [1],[2],[5],[8],[9] $ 4,665,000 [3],[4],[10],[11],[14]
Investment, Identifier [Axis]: Granicus Inc., Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 817,000 817,000
Fair Value (4,000) (4,000)
Investment, Identifier [Axis]: Granicus Inc., Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 2,448,000 2,448,000
Fair Value $ 0 $ 0
Investment, Identifier [Axis]: Graphpad Software, LLC 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.38% [1],[2],[5],[8] 0.40% [3],[4],[10],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[14] $ 24,085,000  
Ending balance $ 24,024,000 [1],[2],[5],[8] $ 24,085,000 [3],[4],[10],[14]
Investment, Identifier [Axis]: Graphpad Software, LLC 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.01% [1],[2],[5],[7],[8],[9] 0.01% [3],[4],[10],[11],[13],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[11],[13],[14] $ 591,000  
Ending balance 562,000 [1],[2],[5],[7],[8],[9] $ 591,000 [3],[4],[10],[11],[13],[14]
Investment, Identifier [Axis]: Graphpad Software, LLC, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 5,433,000 5,433,000
Fair Value 0 0
Investment, Identifier [Axis]: Graphpad Software, LLC, Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 2,264,000 2,264,000
Fair Value $ (11,000) (11,000)
Investment, Identifier [Axis]: Ground Penetrating Radar Systems LLC, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments   563,000
Fair Value   0
Investment, Identifier [Axis]: Ground Penetrating Radar Systems LLC, Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments   300,000
Fair Value   0
Investment, Identifier [Axis]: Ground Penetrating Radar Systems LLC, Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments   2,929,000
Fair Value   $ 0
Investment, Identifier [Axis]: Ground Penetrating Radar Systems, LLC 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[5],[7],[8] 0.05%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[5],[7],[8] $ 2,929,000  
Investment, Identifier [Axis]: Ground Penetrating Radar Systems, LLC 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[5],[8],[9] 0.00%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[5],[8],[9] $ 32,000  
Investment, Identifier [Axis]: Ground Penetrating Radar Systems, LLC, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 569,000  
Fair Value (3,000)  
Investment, Identifier [Axis]: Ground Penetrating Radar Systems, LLC, Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 265,000  
Fair Value $ 0  
Investment, Identifier [Axis]: Guidehouse, Inc.    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 5.00% [1],[2],[5],[8] 5.12% [3],[4],[10],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[14] $ 311,085,000  
Ending balance $ 311,831,000 [1],[2],[5],[8] $ 311,085,000 [3],[4],[10],[14]
Investment, Identifier [Axis]: Gusto Sing Bidco Pte Ltd    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.01% [1],[2],[5],[6],[7],[8],[9] 0.01% [3],[4],[10],[11],[12],[13],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[11],[12],[13],[14] $ 612,000  
Ending balance 618,000 [1],[2],[5],[6],[7],[8],[9] $ 612,000 [3],[4],[10],[11],[12],[13],[14]
Investment, Identifier [Axis]: Gusto Sing Bidco Pte Ltd, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 101,000 101,000
Fair Value $ 0 0
Investment, Identifier [Axis]: Hargreaves Lansdown, Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments   17,799,000
Fair Value   $ 0
Investment, Identifier [Axis]: Harp Finco, Ltd.    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[6],[7],[8],[17] 0.29%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[6],[7],[8],[17] $ 18,366,000  
Investment, Identifier [Axis]: Healthcomp Holding Company, LLC    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.19% [1],[2],[7],[8],[17] 0.19% [3],[4],[13],[14],[18]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[13],[14],[18] $ 11,429,000  
Ending balance $ 11,835,000 [1],[2],[7],[8],[17] $ 11,429,000 [3],[4],[13],[14],[18]
Investment, Identifier [Axis]: Healthcomp Holding Company, LLC    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[5],[8] 1.62%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[5],[8] $ 101,371,000  
Investment, Identifier [Axis]: Healthcomp Holding Company, LLC - Preferred Interest    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.01% [1],[2],[8] 0.01% [3],[4],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[14] $ 906,000  
Ending balance 916,000 [1],[2],[8] $ 906,000 [3],[4],[14]
Investment, Identifier [Axis]: Healthcomp Holding Company, LLC 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[10],[14]   1.66%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[14] $ 100,797,000  
Ending balance [3],[4],[10],[14]   $ 100,797,000
Investment, Identifier [Axis]: Helix TS, LLC 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.33% [1],[2],[5],[8],[9] 0.33% [3],[4],[10],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[14] $ 20,195,000  
Ending balance $ 20,577,000 [1],[2],[5],[8],[9] $ 20,195,000 [3],[4],[10],[14]
Investment, Identifier [Axis]: Helix TS, LLC 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.33% [1],[2],[5],[8] 0.34% [3],[4],[10],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[14] $ 20,554,000  
Ending balance $ 20,548,000 [1],[2],[5],[8] $ 20,554,000 [3],[4],[10],[14]
Investment, Identifier [Axis]: Helix TS, LLC 3    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.06% [1],[2],[5],[7],[8] 0.06% [3],[4],[10],[13],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[13],[14] $ 3,719,000  
Ending balance $ 3,709,000 [1],[2],[5],[7],[8] $ 3,719,000 [3],[4],[10],[13],[14]
Investment, Identifier [Axis]: Helix TS, LLC 4    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.02% [1],[2],[5],[7],[8] 0.01% [3],[4],[10],[11],[13],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[11],[13],[14] $ 826,000  
Ending balance 965,000 [1],[2],[5],[7],[8] $ 826,000 [3],[4],[10],[11],[13],[14]
Investment, Identifier [Axis]: Helix TS, LLC, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 13,623,000 14,165,000
Fair Value $ 0 $ 0
Investment, Identifier [Axis]: Higginbotham Insurance Agency, Inc    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[6],[7],[8],[15] 0.08%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[6],[7],[8],[15] $ 4,963,000  
Investment, Identifier [Axis]: Higginbotham Insurance Agency, Inc.    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[12],[13],[14],[16]   0.08%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[12],[13],[14],[16] 4,975,000  
Ending balance [3],[4],[12],[13],[14],[16]   $ 4,975,000
Investment, Identifier [Axis]: High Street Buyer, Inc.    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[10],[11],[14]   1.32%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[11],[14] $ 80,232,000  
Ending balance [3],[4],[10],[11],[14]   $ 80,232,000
Investment, Identifier [Axis]: High Street Buyer, Inc. 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[5],[8] 0.17%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[5],[8] $ 10,306,000  
Investment, Identifier [Axis]: High Street Buyer, Inc. 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[5],[8],[9] 1.14%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[5],[8],[9] $ 70,938,000  
Investment, Identifier [Axis]: High Street Buyer, Inc. 3    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[5],[8],[9] 0.06%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[5],[8],[9] $ 3,600,000  
Investment, Identifier [Axis]: High Street Buyer, Inc., Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 17,181,000  
Fair Value 0  
Investment, Identifier [Axis]: High Street Buyer, Inc., Delayed Draw Term Loan 1    
Schedule of Investments [Line Items]    
Unfunded commitments   1,187,000
Fair Value   0
Investment, Identifier [Axis]: High Street Buyer, Inc., Delayed Draw Term Loan 2    
Schedule of Investments [Line Items]    
Unfunded commitments   20,953,000
Fair Value   0
Investment, Identifier [Axis]: High Street Buyer, Inc., Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 2,254,000 2,254,000
Fair Value $ (45,000) $ (45,000)
Investment, Identifier [Axis]: Home Service TopCo IV Inc    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[8],[9],[15] 0.60%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[8],[9],[15] $ 37,267,000  
Investment, Identifier [Axis]: Home Service TopCo IV Inc, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 2,910,000  
Fair Value 0  
Investment, Identifier [Axis]: Home Service TopCo IV Inc, Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 3,509,000  
Fair Value $ (38,000)  
Investment, Identifier [Axis]: Homecare Software Solutions, LLC 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.24% [1],[2],[5],[8] 0.24% [3],[4],[10],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[14] $ 14,643,000  
Ending balance $ 14,753,000 [1],[2],[5],[8] $ 14,643,000 [3],[4],[10],[14]
Investment, Identifier [Axis]: Homecare Software Solutions, LLC 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.11% [1],[2],[5],[8] 0.11% [3],[4],[10],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[14] $ 6,671,000  
Ending balance $ 6,722,000 [1],[2],[5],[8] $ 6,671,000 [3],[4],[10],[14]
Investment, Identifier [Axis]: Homecare Software Solutions, LLC 3    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.09% [1],[2],[5],[8] 0.09% [3],[4],[10],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[14] $ 5,439,000  
Ending balance $ 5,480,000 [1],[2],[5],[8] $ 5,439,000 [3],[4],[10],[14]
Investment, Identifier [Axis]: Horizon CTS Buyer, LLC    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[5],[8],[9] 0.02%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[5],[8],[9] $ 1,066,000  
Investment, Identifier [Axis]: Horizon CTS Buyer, LLC, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 200,000  
Fair Value 0  
Investment, Identifier [Axis]: Horizon CTS Buyer, LLC, Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 230,000  
Fair Value 0  
Investment, Identifier [Axis]: IEM New Sub 2, LLC    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[10],[11],[14]   0.95%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[11],[14] $ 57,825,000  
Ending balance [3],[4],[10],[11],[14]   $ 57,825,000
Investment, Identifier [Axis]: IEM New Sub 2, LLC    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[5],[8],[9] 0.93%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[5],[8],[9] $ 57,825,000  
Investment, Identifier [Axis]: IEM New Sub 2, LLC, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 13,164,000 13,164,000
Fair Value $ (99,000) $ (99,000)
Investment, Identifier [Axis]: IG Investments Holdings, LLC    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.74% [1],[2],[5],[8],[9] 0.76% [3],[4],[10],[11],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[11],[14] $ 46,347,000  
Ending balance 46,231,000 [1],[2],[5],[8],[9] $ 46,347,000 [3],[4],[10],[11],[14]
Investment, Identifier [Axis]: IG Investments Holdings, LLC, Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 4,416,000 4,416,000
Fair Value $ 0 $ 0
Investment, Identifier [Axis]: IQN Holding Corp 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.08% [1],[2],[5],[8] 0.08% [3],[4],[13],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[13],[14] $ 4,892,000  
Ending balance $ 4,879,000 [1],[2],[5],[8] $ 4,892,000 [3],[4],[13],[14]
Investment, Identifier [Axis]: IQN Holding Corp 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.01% [1],[2],[5],[7],[8],[9] 0.00% [3],[4],[10],[11],[13],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[11],[13],[14] $ 231,000  
Ending balance 335,000 [1],[2],[5],[7],[8],[9] $ 231,000 [3],[4],[10],[11],[13],[14]
Investment, Identifier [Axis]: IQN Holding Corp, Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 256,000 359,000
Fair Value $ 0 $ 0
Investment, Identifier [Axis]: IRI Group Holdings Inc 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 3.16% [1],[2],[5],[8] 3.25% [3],[4],[10],[13],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[13],[14] $ 197,500,000  
Ending balance $ 197,025,000 [1],[2],[5],[8] $ 197,500,000 [3],[4],[10],[13],[14]
Investment, Identifier [Axis]: IRI Group Holdings Inc 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.02% [1],[2],[5],[7],[8],[9] 0.05% [3],[4],[10],[11],[13],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[11],[13],[14] $ 2,760,000  
Ending balance 1,546,000 [1],[2],[5],[7],[8],[9] $ 2,760,000 [3],[4],[10],[11],[13],[14]
Investment, Identifier [Axis]: IRI Group Holdings Inc, Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 12,255,000 11,040,000
Fair Value $ 0 $ 0
Investment, Identifier [Axis]: ISQ Hawkeye Holdco, Inc 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[5],[7],[8] 0.02%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[5],[7],[8] $ 977,000  
Investment, Identifier [Axis]: ISQ Hawkeye Holdco, Inc 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[5],[7],[8],[9] 0.00%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[5],[7],[8],[9] $ 63,000  
Investment, Identifier [Axis]: ISQ Hawkeye Holdco, Inc. 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[10],[13],[14]   0.02%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[13],[14] 979,000  
Ending balance [3],[4],[10],[13],[14]   $ 979,000
Investment, Identifier [Axis]: ISQ Hawkeye Holdco, Inc. 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[10],[11],[13],[14]   0.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[11],[13],[14] 34,000  
Ending balance [3],[4],[10],[11],[13],[14]   $ 34,000
Investment, Identifier [Axis]: ISQ Hawkeye Holdco, Inc., Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 151,000 151,000
Fair Value 0 0
Investment, Identifier [Axis]: ISQ Hawkeye Holdco, Inc., Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 54,000 83,000
Fair Value $ 0 $ 0
Investment, Identifier [Axis]: Icefall Parent, Inc.    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.52% [1],[2],[8],[9],[15] 0.54% [3],[4],[11],[13],[14],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[11],[13],[14],[16] $ 32,592,000  
Ending balance 32,592,000 [1],[2],[8],[9],[15] $ 32,592,000 [3],[4],[11],[13],[14],[16]
Investment, Identifier [Axis]: Icefall Parent, Inc., Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 3,104,000 3,104,000
Fair Value 0 $ 0
Investment, Identifier [Axis]: Identity Digital, Inc.    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[14],[16],[27]   5.20%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[14],[16],[27] 315,889,000  
Ending balance [3],[4],[14],[16],[27]   $ 315,889,000
Investment, Identifier [Axis]: Imagine 360 LLC    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[10],[11],[13],[14]   0.28%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[11],[13],[14] $ 16,957,000  
Ending balance [3],[4],[10],[11],[13],[14]   $ 16,957,000
Investment, Identifier [Axis]: Imagine 360 LLC    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[5],[7],[8],[9] 0.27%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[5],[7],[8],[9] $ 16,999,000  
Investment, Identifier [Axis]: Imagine 360 LLC, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 2,413,000 2,413,000
Fair Value (12,000) (12,000)
Investment, Identifier [Axis]: Imagine 360 LLC, Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 1,514,000 1,514,000
Fair Value (15,000) $ (15,000)
Investment, Identifier [Axis]: Inception Fertility Ventures, LLC    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[10],[11],[14]   0.75%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[11],[14] $ 45,315,000  
Ending balance [3],[4],[10],[11],[14]   $ 45,315,000
Investment, Identifier [Axis]: Inception Fertility Ventures, LLC    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[5],[8],[9] 0.73%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[5],[8],[9] $ 45,534,000  
Investment, Identifier [Axis]: Inception Fertility Ventures, LLC, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 10,488,000 10,488,000
Fair Value 0 0
Investment, Identifier [Axis]: Inception Fertility Ventures, LLC, Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 273,000 797,000
Fair Value $ 0 $ 0
Investment, Identifier [Axis]: Infostretch Corporation    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.07% [1],[2],[8] 0.07% [3],[4],[10],[13],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[13],[14] $ 4,534,000  
Ending balance $ 4,522,000 [1],[2],[8] $ 4,534,000 [3],[4],[10],[13],[14]
Investment, Identifier [Axis]: Inovalon Holdings, Inc.    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.23% [1],[2],[5],[8] 0.23% [3],[4],[10],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[14] $ 14,061,000  
Ending balance $ 14,613,000 [1],[2],[5],[8] $ 14,061,000 [3],[4],[10],[14]
Investment, Identifier [Axis]: Inovalon Holdings, Inc. 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 1.80% [1],[2],[5],[8] 1.85% [3],[4],[10],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[14] $ 112,337,000  
Ending balance $ 112,568,000 [1],[2],[5],[8] $ 112,337,000 [3],[4],[10],[14]
Investment, Identifier [Axis]: Inovalon Holdings, Inc. 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.13% [1],[2],[5],[8] 0.13% [3],[4],[10],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[14] $ 8,155,000  
Ending balance 8,180,000 [1],[2],[5],[8] $ 8,155,000 [3],[4],[10],[14]
Investment, Identifier [Axis]: Integrity Marketing Acquisition LLC    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[10],[11],[14]   2.51%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[11],[14] $ 152,532,000  
Ending balance [3],[4],[10],[11],[14]   $ 152,532,000
Investment, Identifier [Axis]: Integrity Marketing Acquisition LLC    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[5],[8],[9] 2.44%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[5],[8],[9] $ 152,150,000  
Investment, Identifier [Axis]: Integrity Marketing Acquisition LLC, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 20,378,000 20,378,000
Fair Value (43,000) (43,000)
Investment, Identifier [Axis]: Integrity Marketing Acquisition LLC, Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 2,767,000 2,767,000
Fair Value $ 0 $ 0
Investment, Identifier [Axis]: Investment Eight    
Schedule of Investments [Line Items]    
Interest rate, floor 3.00% 3.00%
Investment, Identifier [Axis]: Investment Five    
Schedule of Investments [Line Items]    
Interest rate, floor 1.25% 1.25%
Investment, Identifier [Axis]: Investment Four    
Schedule of Investments [Line Items]    
Interest rate, floor 1.00% 1.00%
Investment, Identifier [Axis]: Investment One    
Schedule of Investments [Line Items]    
Interest rate, floor 0.00% 0.00%
Investment, Identifier [Axis]: Investment Seven    
Schedule of Investments [Line Items]    
Interest rate, floor 2.00% 2.00%
Investment, Identifier [Axis]: Investment Six    
Schedule of Investments [Line Items]    
Interest rate, floor 1.50% 1.50%
Investment, Identifier [Axis]: Investment Three    
Schedule of Investments [Line Items]    
Interest rate, floor 0.75% 0.75%
Investment, Identifier [Axis]: Investment Two    
Schedule of Investments [Line Items]    
Interest rate, floor 0.50% 0.50%
Investment, Identifier [Axis]: Iris Buyer, LLC 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.41% [1],[2],[8],[15] 0.42% [3],[4],[14],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[14],[16] $ 25,453,000  
Ending balance $ 25,392,000 [1],[2],[8],[15] $ 25,453,000 [3],[4],[14],[16]
Investment, Identifier [Axis]: Iris Buyer, LLC 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.04% [1],[2],[7],[8],[15] 0.04% [3],[4],[11],[13],[14],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[11],[13],[14],[16] $ 2,282,000  
Ending balance $ 2,394,000 [1],[2],[7],[8],[15] $ 2,282,000 [3],[4],[11],[13],[14],[16]
Investment, Identifier [Axis]: Iris Buyer, LLC 3    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[7],[8],[9],[15] 0.02%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[7],[8],[9],[15] $ 1,102,000  
Investment, Identifier [Axis]: Iris Buyer, LLC 4    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[8],[9],[15] 0.00%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[8],[9],[15] $ 236,000  
Investment, Identifier [Axis]: Iris Buyer, LLC, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 5,055,000 1,426,000
Fair Value 0 0
Investment, Identifier [Axis]: Iris Buyer, LLC, Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 2,748,000 3,673,000
Fair Value $ 0 $ (101,000)
Investment, Identifier [Axis]: Italian Motorway Holdings S.à r.l    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 1.37% [1],[2],[6],[7],[8],[17] 1.34% [3],[4],[12],[13],[14],[18]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[12],[13],[14],[18] $ 81,635,000  
Ending balance $ 85,217,000 [1],[2],[6],[7],[8],[17] $ 81,635,000 [3],[4],[12],[13],[14],[18]
Investment, Identifier [Axis]: JS Parent Inc    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.57% [1],[2],[5],[8],[9] 0.59% [3],[4],[10],[11],[13],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[11],[13],[14] $ 35,560,000  
Ending balance 35,471,000 [1],[2],[5],[8],[9] $ 35,560,000 [3],[4],[10],[11],[13],[14]
Investment, Identifier [Axis]: JS Parent Inc, Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 3,452,000 3,452,000
Fair Value $ (17,000) $ (17,000)
Investment, Identifier [Axis]: JSS Holdings, Inc. 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 4.55% [1],[2],[5],[8] 4.64% [3],[4],[10],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[14] $ 281,886,000  
Ending balance $ 284,023,000 [1],[2],[5],[8] $ 281,886,000 [3],[4],[10],[14]
Investment, Identifier [Axis]: JSS Holdings, Inc. 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.08% [1],[2],[5],[7],[8] 0.08% [3],[4],[10],[13],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[13],[14] $ 4,868,000  
Ending balance $ 4,905,000 [1],[2],[5],[7],[8] $ 4,868,000 [3],[4],[10],[13],[14]
Investment, Identifier [Axis]: JSS Holdings, Inc. 3    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.50% [1],[2],[5],[7],[8],[9] 0.51% [3],[4],[10],[11],[13],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[11],[13],[14] $ 30,967,000  
Ending balance 31,200,000 [1],[2],[5],[7],[8],[9] $ 30,967,000 [3],[4],[10],[11],[13],[14]
Investment, Identifier [Axis]: JSS Holdings, Inc., Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 7,492,000 7,492,000
Fair Value $ (37,000) $ (37,000)
Investment, Identifier [Axis]: Jacuzzi Brands, LLC 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.17% [1],[2],[5],[7],[8] 0.17% [3],[4],[10],[13],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[13],[14] $ 10,469,000  
Ending balance $ 10,469,000 [1],[2],[5],[7],[8] $ 10,469,000 [3],[4],[10],[13],[14]
Investment, Identifier [Axis]: Jacuzzi Brands, LLC 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 1.15% [1],[2],[5],[8] 1.19% [3],[4],[10],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[14] $ 72,027,000  
Ending balance $ 72,027,000 [1],[2],[5],[8] $ 72,027,000 [3],[4],[10],[14]
Investment, Identifier [Axis]: Java Buyer, Inc. 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.07% [1],[2],[5],[8] 0.07% [3],[4],[10],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[14] $ 4,171,000  
Ending balance $ 4,171,000 [1],[2],[5],[8] $ 4,171,000 [3],[4],[10],[14]
Investment, Identifier [Axis]: Java Buyer, Inc. 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.05% [1],[2],[5],[8] 0.05% [3],[4],[10],[13],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[13],[14] $ 2,896,000  
Ending balance $ 2,895,000 [1],[2],[5],[8] $ 2,896,000 [3],[4],[10],[13],[14]
Investment, Identifier [Axis]: Java Buyer, Inc. 3    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.03% [1],[2],[5],[8] 0.04% [3],[4],[10],[11],[13],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[11],[13],[14] $ 2,731,000  
Ending balance $ 1,628,000 [1],[2],[5],[8] $ 2,731,000 [3],[4],[10],[11],[13],[14]
Investment, Identifier [Axis]: Java Buyer, Inc. 4    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[5],[7],[8],[9] 0.03%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[5],[7],[8],[9] $ 1,968,000  
Investment, Identifier [Axis]: Java Buyer, Inc., Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 465,000 1,347,000
Fair Value 0 0
Investment, Identifier [Axis]: Java Buyer, Inc., Revolver 1    
Schedule of Investments [Line Items]    
Unfunded commitments 367,000 367,000
Fair Value 0 0
Investment, Identifier [Axis]: Java Buyer, Inc., Revolver 2    
Schedule of Investments [Line Items]    
Unfunded commitments 735,000 735,000
Fair Value $ 0 $ 0
Investment, Identifier [Axis]: Jayhawk Buyer, LLC    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.08% [1],[2],[8],[15] 0.08% [3],[4],[14],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[14],[16] $ 4,769,000  
Ending balance $ 4,795,000 [1],[2],[8],[15] $ 4,769,000 [3],[4],[14],[16]
Investment, Identifier [Axis]: Jayhawk Buyer, LLC    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[8],[15] 1.93%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[8],[15] $ 120,343,000  
Investment, Identifier [Axis]: Jayhawk Buyer, LLC 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[14],[16]   1.98%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[14],[16] $ 120,404,000  
Ending balance [3],[4],[14],[16]   $ 120,404,000
Investment, Identifier [Axis]: Jayhawk Holdings, LP - Class A-1 Common Units    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.00% [1],[2],[8] 0.00% [3],[4],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[14] $ 79,000  
Ending balance $ 34,000 [1],[2],[8] $ 79,000 [3],[4],[14]
Investment, Identifier [Axis]: Jayhawk Holdings, LP - Class A-2 Common Units    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.00% [1],[2],[8] 0.00% [3],[4],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[14] $ 23,000  
Ending balance $ 18,000 [1],[2],[8] $ 23,000 [3],[4],[14]
Investment, Identifier [Axis]: Jupiter Ultimate Holdings, LLC - Class A Common Units    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.00% [1],[2],[8] 0.00% [3],[4],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[14] $ 0  
Ending balance $ 0 [1],[2],[8] $ 0 [3],[4],[14]
Investment, Identifier [Axis]: Jupiter Ultimate Holdings, LLC - Class B Common Units    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.00% [1],[2],[8] 0.00% [3],[4],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[14] $ 208,000  
Ending balance $ 215,000 [1],[2],[8] $ 208,000 [3],[4],[14]
Investment, Identifier [Axis]: Jupiter Ultimate Holdings, LLC - Class C Common Units    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.00% [1],[2],[8] 0.00% [3],[4],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[14] $ 220,000  
Ending balance $ 220,000 [1],[2],[8] $ 220,000 [3],[4],[14]
Investment, Identifier [Axis]: KEN Bidco Ltd    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.19% [1],[2],[5],[6],[7],[8] 0.19% [3],[4],[10],[12],[13],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[12],[13],[14] $ 11,546,000  
Ending balance $ 11,799,000 [1],[2],[5],[6],[7],[8] $ 11,546,000 [3],[4],[10],[12],[13],[14]
Investment, Identifier [Axis]: KKR Alberta Midstream Finance Inc.    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.43% [1],[2],[5],[6],[8] 0.44% [3],[4],[10],[12],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[12],[14] $ 26,870,000  
Ending balance $ 26,870,000 [1],[2],[5],[6],[8] $ 26,870,000 [3],[4],[10],[12],[14]
Investment, Identifier [Axis]: KPSKY Acquisition, Inc. 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [5] 0.28% [1],[2],[8],[24] 0.29% [3],[4],[10],[14],[26]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[10],[14],[26] $ 17,408,000  
Ending balance [5] $ 17,163,000 [1],[2],[8],[24] $ 17,408,000 [3],[4],[10],[14],[26]
Investment, Identifier [Axis]: KPSKY Acquisition, Inc. 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [5] 0.03% [1],[2],[7],[8],[24] 0.03% [3],[4],[10],[13],[14],[26]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[10],[13],[14],[26] $ 2,005,000  
Ending balance [5] $ 1,976,000 [1],[2],[7],[8],[24] $ 2,005,000 [3],[4],[10],[13],[14],[26]
Investment, Identifier [Axis]: Kattegat Project Bidco AB 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.04% [1],[2],[6],[7],[8],[17] 0.04% [3],[4],[12],[13],[14],[18]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[12],[13],[14],[18] $ 2,605,000  
Ending balance $ 2,605,000 [1],[2],[6],[7],[8],[17] $ 2,605,000 [3],[4],[12],[13],[14],[18]
Investment, Identifier [Axis]: Kattegat Project Bidco AB 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.52% [1],[2],[6],[7],[8],[9],[17] 0.51% [3],[4],[11],[12],[13],[14],[18]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[11],[12],[13],[14],[18] $ 30,803,000  
Ending balance 32,155,000 [1],[2],[6],[7],[8],[9],[17] $ 30,803,000 [3],[4],[11],[12],[13],[14],[18]
Investment, Identifier [Axis]: Kattegat Project Bidco AB, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 7,030,000 7,030,000
Fair Value $ (88,000) $ (84,000)
Investment, Identifier [Axis]: Knowledge Pro Buyer, Inc.    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.13% [1],[2],[5],[8],[9] 0.12% [3],[4],[10],[11],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[11],[14] $ 7,559,000  
Ending balance 7,866,000 [1],[2],[5],[8],[9] $ 7,559,000 [3],[4],[10],[11],[14]
Investment, Identifier [Axis]: Knowledge Pro Buyer, Inc., Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 906,000 906,000
Fair Value 0 0
Investment, Identifier [Axis]: Knowledge Pro Buyer, Inc., Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 454,000 950,000
Fair Value $ 0 $ 0
Investment, Identifier [Axis]: Kona Buyer, LLC 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.02% [1],[2],[5],[7],[8] 0.00% [3],[4],[10],[11],[13],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[11],[13],[14] $ 58,000  
Ending balance $ 1,037,000 [1],[2],[5],[7],[8] $ 58,000 [3],[4],[10],[11],[13],[14]
Investment, Identifier [Axis]: Kona Buyer, LLC 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.00% [1],[2],[5],[7],[8],[9] 0.02% [3],[4],[10],[13],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[13],[14] $ 1,039,000  
Ending balance 59,000 [1],[2],[5],[7],[8],[9] $ 1,039,000 [3],[4],[10],[13],[14]
Investment, Identifier [Axis]: Kona Buyer, LLC, Delayed Draw Term Loan 1    
Schedule of Investments [Line Items]    
Unfunded commitments 246,000 246,000
Fair Value 0 0
Investment, Identifier [Axis]: Kona Buyer, LLC, Delayed Draw Term Loan 2    
Schedule of Investments [Line Items]    
Unfunded commitments 307,000 307,000
Fair Value (2,000) (2,000)
Investment, Identifier [Axis]: Kona Buyer, LLC, Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 123,000 123,000
Fair Value $ (1,000) $ (1,000)
Investment, Identifier [Axis]: Kwol Acquisition, Inc    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[5],[7],[8],[9] 0.10%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[5],[7],[8],[9] $ 6,537,000  
Investment, Identifier [Axis]: Kwol Acquisition, Inc.    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[10],[11],[13],[14]   0.11%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[11],[13],[14] 6,535,000  
Ending balance [3],[4],[10],[11],[13],[14]   $ 6,535,000
Investment, Identifier [Axis]: Kwol Acquisition, Inc., Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 897,000 897,000
Fair Value $ 0 $ (2,000)
Investment, Identifier [Axis]: L&S Mechanical Acquisition, LLC    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[5],[8] 0.24%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[5],[8] $ 14,903,000  
Investment, Identifier [Axis]: L&S Mechanical Acquisition, LLC 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[10],[13],[14]   0.23%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[13],[14] 13,864,000  
Ending balance [3],[4],[10],[13],[14]   $ 13,864,000
Investment, Identifier [Axis]: L&S Mechanical Acquisition, LLC 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[10],[13],[14]   0.02%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[13],[14] $ 1,226,000  
Ending balance [3],[4],[10],[13],[14]   $ 1,226,000
Investment, Identifier [Axis]: LD Lower Holdings, Inc.    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 1.34% [1],[2],[8],[15] 1.38% [3],[4],[14],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[14],[16] $ 83,671,000  
Ending balance $ 83,437,000 [1],[2],[8],[15] $ 83,671,000 [3],[4],[14],[16]
Investment, Identifier [Axis]: LPW Group Holdings, Inc    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[8],[9],[15] 0.43%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[8],[9],[15] $ 26,661,000  
Investment, Identifier [Axis]: LPW Group Holdings, Inc.    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[11],[14],[16]   0.44%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[11],[14],[16] 26,728,000  
Ending balance [3],[4],[11],[14],[16]   $ 26,728,000
Investment, Identifier [Axis]: LPW Group Holdings, Inc., Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 5,373,000 5,373,000
Fair Value $ 0 $ 0
Investment, Identifier [Axis]: Legacy Intermediate, LLC 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.11% [1],[2],[5],[7],[8] 0.11% [3],[4],[10],[13],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[13],[14] $ 6,697,000  
Ending balance $ 6,684,000 [1],[2],[5],[7],[8] $ 6,697,000 [3],[4],[10],[13],[14]
Investment, Identifier [Axis]: Legacy Intermediate, LLC 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.02% [1],[2],[5],[7],[8] 0.02% [3],[4],[13],[14],[28]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[13],[14],[28] $ 1,290,000  
Ending balance 1,290,000 [1],[2],[5],[7],[8] $ 1,290,000 [3],[4],[13],[14],[28]
Investment, Identifier [Axis]: Lightbox Intermediate, LP    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[13],[14],[18]   0.03%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[13],[14],[18] $ 1,867,000  
Ending balance [3],[4],[13],[14],[18]   $ 1,867,000
Investment, Identifier [Axis]: Lindstrom, LLC    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 1.90% [1],[2],[8],[15] 1.96% [3],[4],[14],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[14],[16] $ 118,943,000  
Ending balance 118,692,000 [1],[2],[8],[15] $ 118,943,000 [3],[4],[14],[16]
Investment, Identifier [Axis]: Livingston International, Inc.    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[10],[12],[14]   2.02%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[12],[14] $ 122,571,000  
Ending balance [3],[4],[10],[12],[14]   $ 122,571,000
Investment, Identifier [Axis]: Lobos Parent, Inc. - Series A Preferred Shares    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.03% [1],[2],[8] 0.03% [3],[4],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[14] $ 2,000,000  
Ending balance $ 2,062,000 [1],[2],[8] $ 2,000,000 [3],[4],[14]
Investment, Identifier [Axis]: LogicMonitor Inc    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.25% [1],[2],[5],[7],[8],[9] 0.26% [3],[4],[10],[11],[13],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[11],[13],[14] $ 15,712,000  
Ending balance 15,712,000 [1],[2],[5],[7],[8],[9] $ 15,712,000 [3],[4],[10],[11],[13],[14]
Investment, Identifier [Axis]: LogicMonitor Inc, Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 1,992,000 1,992,000
Fair Value (25,000) (25,000)
Investment, Identifier [Axis]: Lsf12 Crown US Commercial Bidco LLC, Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 4,345,000 4,345,000
Fair Value $ (205,000) $ (36,000)
Investment, Identifier [Axis]: Lytx, Inc.    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 1.35% [1],[2],[8],[15] 1.39% [3],[4],[14],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[14],[16] $ 84,454,000  
Ending balance $ 84,454,000 [1],[2],[8],[15] $ 84,454,000 [3],[4],[14],[16]
Investment, Identifier [Axis]: MAG DS Corp.    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 1.19% [1],[2] 1.23% [3],[4],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[16] $ 74,788,000  
Ending balance $ 74,260,000 [1],[2] $ 74,788,000 [3],[4],[16]
Investment, Identifier [Axis]: MB2 Dental Solutions, LLC 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.37% [1],[2],[5],[8] 0.38% [3],[4],[10],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[14] $ 23,162,000  
Ending balance $ 23,104,000 [1],[2],[5],[8] $ 23,162,000 [3],[4],[10],[14]
Investment, Identifier [Axis]: MB2 Dental Solutions, LLC 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.04% [1],[2],[5],[7],[8],[9] 0.03% [3],[4],[10],[11],[13],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[11],[13],[14] $ 1,667,000  
Ending balance $ 2,655,000 [1],[2],[5],[7],[8],[9] $ 1,667,000 [3],[4],[10],[11],[13],[14]
Investment, Identifier [Axis]: MB2 Dental Solutions, LLC 3    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.05% [1],[2],[5],[7],[8] 0.06% [3],[4],[10],[13],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[13],[14] $ 3,381,000  
Ending balance 3,417,000 [1],[2],[5],[7],[8] $ 3,381,000 [3],[4],[10],[13],[14]
Investment, Identifier [Axis]: MB2 Dental Solutions, LLC, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 5,579,000 6,570,000
Fair Value 0 0
Investment, Identifier [Axis]: MB2 Dental Solutions, LLC, Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 1,382,000 1,382,000
Fair Value $ 0 $ 0
Investment, Identifier [Axis]: MHE Intermediate Holdings, LLC 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.03% [1],[2],[7],[8],[9],[15] 0.03% [3],[4],[11],[13],[14],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[11],[13],[14],[16] $ 1,908,000  
Ending balance $ 1,959,000 [1],[2],[7],[8],[9],[15] $ 1,908,000 [3],[4],[11],[13],[14],[16]
Investment, Identifier [Axis]: MHE Intermediate Holdings, LLC 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.00% [1],[2],[7],[8],[15] 0.00% [3],[4],[13],[14],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[13],[14],[16] $ 76,000  
Ending balance $ 76,000 [1],[2],[7],[8],[15] $ 76,000 [3],[4],[13],[14],[16]
Investment, Identifier [Axis]: MHE Intermediate Holdings, LLC 3    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.00% [1],[2],[7],[8],[15] 0.00% [3],[4],[13],[14],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[13],[14],[16] $ 76,000  
Ending balance 76,000 [1],[2],[7],[8],[15] $ 76,000 [3],[4],[13],[14],[16]
Investment, Identifier [Axis]: MHE Intermediate Holdings, LLC, Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 161,000 214,000
Fair Value $ 0 $ 0
Investment, Identifier [Axis]: MPG Parent Holdings, LLC 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.17% [1],[2],[8],[15] 0.18% [3],[4],[14],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[14],[16] $ 10,872,000  
Ending balance $ 10,845,000 [1],[2],[8],[15] $ 10,872,000 [3],[4],[14],[16]
Investment, Identifier [Axis]: MPG Parent Holdings, LLC 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.04% [1],[2],[7],[8],[9],[15] 0.04% [3],[4],[11],[13],[14],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[11],[13],[14],[16] $ 2,646,000  
Ending balance 2,639,000 [1],[2],[7],[8],[9],[15] $ 2,646,000 [3],[4],[11],[13],[14],[16]
Investment, Identifier [Axis]: MPG Parent Holdings, LLC, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 3,087,000 3,087,000
Fair Value (23,000) (23,000)
Investment, Identifier [Axis]: MPG Parent Holdings, LLC, Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 1,339,000 1,339,000
Fair Value $ 0 $ 0
Investment, Identifier [Axis]: MRI Software, LLC 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.11% [1],[2],[15] 0.11% [3],[4],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[16] $ 6,742,000  
Ending balance $ 6,656,000 [1],[2],[15] $ 6,742,000 [3],[4],[16]
Investment, Identifier [Axis]: MRI Software, LLC 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 1.44% [1],[2],[15] 0.84% [3],[4],[11],[14],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[11],[14],[16] $ 50,879,000  
Ending balance $ 89,761,000 [1],[2],[15] $ 50,879,000 [3],[4],[11],[14],[16]
Investment, Identifier [Axis]: MRI Software, LLC 3    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.00% [1],[2],[8],[9],[15] 0.66% [3],[4],[14],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[14],[16] $ 40,020,000  
Ending balance 188,000 [1],[2],[8],[9],[15] $ 40,020,000 [3],[4],[14],[16]
Investment, Identifier [Axis]: MRI Software, LLC, Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 6,953,000 6,953,000
Fair Value $ 0 $ 0
Investment, Identifier [Axis]: Magic Bidco Inc 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.32% [1],[2],[5],[8] 0.33% [3],[4],[10],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[14] $ 19,808,000  
Ending balance $ 19,859,000 [1],[2],[5],[8] $ 19,808,000 [3],[4],[10],[14]
Investment, Identifier [Axis]: Magic Bidco Inc 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.04% [1],[2],[5],[7],[8],[9] 0.04% [3],[4],[10],[11],[13],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[11],[13],[14] $ 2,570,000  
Ending balance $ 2,775,000 [1],[2],[5],[7],[8],[9] $ 2,570,000 [3],[4],[10],[11],[13],[14]
Investment, Identifier [Axis]: Magic Bidco Inc 3    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.01% [1],[2],[5],[7],[8],[9] 0.01% [3],[4],[10],[11],[13],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[11],[13],[14] $ 740,000  
Ending balance 723,000 [1],[2],[5],[7],[8],[9] $ 740,000 [3],[4],[10],[11],[13],[14]
Investment, Identifier [Axis]: Magic Bidco Inc, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 7,098,000 7,098,000
Fair Value 0 0
Investment, Identifier [Axis]: Magic Bidco Inc, Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 902,000 1,088,000
Fair Value $ 0 $ 0
Investment, Identifier [Axis]: Magnesium BorrowerCo, Inc. 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.09% [1],[2],[5],[7],[8] 0.09% [3],[4],[10],[13],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[13],[14] $ 5,628,000  
Ending balance $ 5,614,000 [1],[2],[5],[7],[8] $ 5,628,000 [3],[4],[10],[13],[14]
Investment, Identifier [Axis]: Magnesium BorrowerCo, Inc. 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.00% [1],[2],[5],[7],[8] 0.00% [3],[4],[10],[13],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[13],[14] $ 140,000  
Ending balance $ 140,000 [1],[2],[5],[7],[8] $ 140,000 [3],[4],[10],[13],[14]
Investment, Identifier [Axis]: Magnesium BorrowerCo, Inc. 3    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.07% [1],[2],[5],[7],[8] 0.07% [3],[4],[10],[13],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[13],[14] $ 4,224,000  
Ending balance $ 4,336,000 [1],[2],[5],[7],[8] $ 4,224,000 [3],[4],[10],[13],[14]
Investment, Identifier [Axis]: Magneto Components BuyCo, LLC    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.52% [1],[2],[5],[8],[9] 0.54% [3],[4],[10],[11],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[11],[14] $ 32,631,000  
Ending balance 32,719,000 [1],[2],[5],[8],[9] $ 32,631,000 [3],[4],[10],[11],[14]
Investment, Identifier [Axis]: Magneto Components BuyCo, LLC, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 6,610,000 6,610,000
Fair Value (83,000) (83,000)
Investment, Identifier [Axis]: Magneto Components BuyCo, LLC, Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 5,508,000 5,508,000
Fair Value $ (110,000) $ (110,000)
Investment, Identifier [Axis]: Mandolin Technology Holdings, Inc. - Series A Preferred Shares    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.06% [1],[2],[8] 0.06% [3],[4],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[14] $ 3,781,000  
Ending balance $ 3,712,000 [1],[2],[8] $ 3,781,000 [3],[4],[14]
Investment, Identifier [Axis]: Mandolin Technology Intermediate Holdings, Inc.    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.05% [1],[2],[7],[8],[22] 0.05% [3],[4],[13],[14],[28]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[13],[14],[28] $ 3,035,000  
Ending balance $ 2,947,000 [1],[2],[7],[8],[22] $ 3,035,000 [3],[4],[13],[14],[28]
Investment, Identifier [Axis]: Mandolin Technology Intermediate Holdings, Inc. 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.12% [1],[2],[7],[8],[22] 0.12% [3],[4],[13],[14],[28]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[13],[14],[28] $ 7,300,000  
Ending balance $ 7,323,000 [1],[2],[7],[8],[22] $ 7,300,000 [3],[4],[13],[14],[28]
Investment, Identifier [Axis]: Mandolin Technology Intermediate Holdings, Inc. 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.10% [1],[2],[7],[8],[9],[22] 0.11% [3],[4],[13],[14],[28]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[13],[14],[28] $ 6,619,000  
Ending balance 6,382,000 [1],[2],[7],[8],[9],[22] $ 6,619,000 [3],[4],[13],[14],[28]
Investment, Identifier [Axis]: Mandolin Technology Intermediate Holdings, Inc. 3    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[13],[14],[18],[28]   0.02%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[13],[14],[18],[28] 1,038,000  
Ending balance [3],[4],[13],[14],[18],[28]   $ 1,038,000
Investment, Identifier [Axis]: Mandolin Technology Intermediate Holdings, Inc., Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 1,200,000  
Fair Value $ (48,000)  
Investment, Identifier [Axis]: Marcone Yellowstone Buyer, Inc 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[5],[7],[8] 0.07%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[5],[7],[8] $ 4,388,000  
Investment, Identifier [Axis]: Marcone Yellowstone Buyer, Inc 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[5],[7],[8] 0.02%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[5],[7],[8] $ 1,399,000  
Investment, Identifier [Axis]: Marcone Yellowstone Buyer, Inc 3    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[5],[7],[8] 0.02%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[5],[7],[8] $ 1,402,000  
Investment, Identifier [Axis]: Marcone Yellowstone Buyer, Inc. 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[10],[13],[14]   0.07%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[13],[14] 4,352,000  
Ending balance [3],[4],[10],[13],[14]   $ 4,352,000
Investment, Identifier [Axis]: Marcone Yellowstone Buyer, Inc. 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[10],[13],[14]   0.02%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[13],[14] 1,399,000  
Ending balance [3],[4],[10],[13],[14]   $ 1,399,000
Investment, Identifier [Axis]: Marcone Yellowstone Buyer, Inc. 3    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[10],[13],[14]   0.02%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[13],[14] $ 1,401,000  
Ending balance [3],[4],[10],[13],[14]   $ 1,401,000
Investment, Identifier [Axis]: Material Holdings, LLC 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.35% [1],[2],[5],[7],[8],[9],[20] 0.35% [3],[4],[10],[11],[13],[14],[21]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[11],[13],[14],[21] $ 21,547,000  
Ending balance $ 22,082,000 [1],[2],[5],[7],[8],[9],[20] $ 21,547,000 [3],[4],[10],[11],[13],[14],[21]
Investment, Identifier [Axis]: Material Holdings, LLC 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.02% [1],[2],[5],[8],[20],[23] 0.02% [3],[4],[10],[13],[14],[21],[25]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[13],[14],[21],[25] $ 1,397,000  
Ending balance 943,000 [1],[2],[5],[8],[20],[23] $ 1,397,000 [3],[4],[10],[13],[14],[21],[25]
Investment, Identifier [Axis]: Material Holdings, LLC, Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 353,000 353,000
Fair Value $ 0 $ (42,000)
Investment, Identifier [Axis]: Material+ Holding Company, LLC - Class C Units    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.00% [1],[2],[8],[20] 0.00% [3],[4],[14],[21]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[14],[21] $ 0  
Ending balance 0 [1],[2],[8],[20] $ 0 [3],[4],[14],[21]
Investment, Identifier [Axis]: Maverick Acquisition, Inc.    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[14],[16],[25]   0.20%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[14],[16],[25] $ 12,273,000  
Ending balance [3],[4],[14],[16],[25]   $ 12,273,000
Investment, Identifier [Axis]: Maverick Acquisition, Inc. 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[8],[15],[23] 0.16%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[8],[15],[23] $ 10,151,000  
Investment, Identifier [Axis]: Maverick Acquisition, Inc. 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[8],[9],[15] 0.00%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[8],[9],[15] $ 276,000  
Investment, Identifier [Axis]: Maverick Acquisition, Inc., Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 96,000  
Fair Value $ 0  
Investment, Identifier [Axis]: Medallia, Inc. 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 5.48% [1],[2],[5],[8] 5.87% [3],[4],[10],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[14] $ 356,442,000  
Ending balance $ 341,848,000 [1],[2],[5],[8] $ 356,442,000 [3],[4],[10],[14]
Investment, Identifier [Axis]: Medallia, Inc. 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.03% [1],[2],[5],[7],[8] 0.03% [3],[4],[10],[13],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[13],[14] $ 2,092,000  
Ending balance $ 2,006,000 [1],[2],[5],[7],[8] $ 2,092,000 [3],[4],[10],[13],[14]
Investment, Identifier [Axis]: Mercury Bidco Globe Limited    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.98% [1],[2],[6],[7],[8],[9],[17] 0.98% [3],[4],[11],[12],[13],[14],[18]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[11],[12],[13],[14],[18] $ 59,401,000  
Ending balance 61,292,000 [1],[2],[6],[7],[8],[9],[17] $ 59,401,000 [3],[4],[11],[12],[13],[14],[18]
Investment, Identifier [Axis]: Mercury Bidco Globe Limited, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 14,933,000 14,933,000
Fair Value $ (173,000) $ (168,000)
Investment, Identifier [Axis]: Micross Topco, Inc. - Common Equity    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.10% [1],[2],[8] 0.12% [3],[4],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[14] $ 7,426,000  
Ending balance $ 6,542,000 [1],[2],[8] $ 7,426,000 [3],[4],[14]
Investment, Identifier [Axis]: Mimecast Limited - LP Interest    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.01% [1],[2],[8] 0.01% [3],[4],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[14] $ 721,000  
Ending balance $ 721,000 [1],[2],[8] $ 721,000 [3],[4],[14]
Investment, Identifier [Axis]: Mode Holdings, L.P. - Class A-2 Common Units    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.09% [1],[2],[8] 0.08% [3],[4],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[14] $ 4,774,000  
Ending balance $ 5,432,000 [1],[2],[8] $ 4,774,000 [3],[4],[14]
Investment, Identifier [Axis]: Mode Purchaser, Inc. 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 2.17% [1],[2],[8],[15] 2.22% [3],[4],[14],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[14],[16] $ 135,164,000  
Ending balance $ 135,164,000 [1],[2],[8],[15] $ 135,164,000 [3],[4],[14],[16]
Investment, Identifier [Axis]: Mode Purchaser, Inc. 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.06% [1],[2],[8],[15] 0.06% [3],[4],[14],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[14],[16] $ 3,858,000  
Ending balance $ 3,858,000 [1],[2],[8],[15] $ 3,858,000 [3],[4],[14],[16]
Investment, Identifier [Axis]: Monk Holding Co. 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.08% [1],[2],[5],[8],[24] 0.08% [3],[4],[14],[26]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[14],[26] $ 4,755,000  
Ending balance $ 4,743,000 [1],[2],[5],[8],[24] $ 4,755,000 [3],[4],[14],[26]
Investment, Identifier [Axis]: Monk Holding Co. 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.00% [1],[2],[5],[7],[8],[9] 0.00% [3],[4],[10],[11],[13],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[11],[13],[14] $ 288,000  
Ending balance 275,000 [1],[2],[5],[7],[8],[9] $ 288,000 [3],[4],[10],[11],[13],[14]
Investment, Identifier [Axis]: Monk Holding Co., Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 917,000 917,000
Fair Value $ 0 $ 0
Investment, Identifier [Axis]: Monterey Financing, S.à r.l. 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.00% [1],[2],[6],[7],[8],[17] 0.00% [3],[4],[12],[13],[14],[18]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[12],[13],[14],[18] $ 189,000  
Ending balance $ 208,000 [1],[2],[6],[7],[8],[17] $ 189,000 [3],[4],[12],[13],[14],[18]
Investment, Identifier [Axis]: Monterey Financing, S.à r.l. 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.02% [1],[2],[6],[7],[8],[17] 0.02% [3],[4],[12],[13],[14],[18]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[12],[13],[14],[18] $ 987,000  
Ending balance $ 1,030,000 [1],[2],[6],[7],[8],[17] $ 987,000 [3],[4],[12],[13],[14],[18]
Investment, Identifier [Axis]: Monterey Financing, S.à r.l. 3    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.01% [1],[2],[6],[7],[8],[17] 0.01% [3],[4],[12],[13],[14],[18]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[12],[13],[14],[18] $ 669,000  
Ending balance $ 698,000 [1],[2],[6],[7],[8],[17] $ 669,000 [3],[4],[12],[13],[14],[18]
Investment, Identifier [Axis]: Monterey Financing, S.à r.l. 4    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.01% [1],[2],[6],[7],[8],[17] 0.01% [3],[4],[12],[13],[14],[28]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[12],[13],[14],[28] $ 452,000  
Ending balance $ 489,000 [1],[2],[6],[7],[8],[17] $ 452,000 [3],[4],[12],[13],[14],[28]
Investment, Identifier [Axis]: More Cowbell II, LLC 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.13% [1],[2],[5],[8] 0.13% [3],[4],[10],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[14] $ 7,917,000  
Ending balance $ 7,897,000 [1],[2],[5],[8] $ 7,917,000 [3],[4],[10],[14]
Investment, Identifier [Axis]: More Cowbell II, LLC 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.00% [1],[2],[5],[7],[8],[9] 0.01% [3],[4],[10],[11],[13],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[11],[13],[14] $ 442,000  
Ending balance 198,000 [1],[2],[5],[7],[8],[9] $ 442,000 [3],[4],[10],[11],[13],[14]
Investment, Identifier [Axis]: More Cowbell II, LLC, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 871,000 916,000
Fair Value (11,000) (11,000)
Investment, Identifier [Axis]: More Cowbell II, LLC, Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 968,000 679,000
Fair Value $ 0 $ 0
Investment, Identifier [Axis]: NAVEX TopCo, Inc.    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.97% [1],[2],[5],[8],[9] 1.00% [3],[4],[10],[11],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[11],[14] $ 60,843,000  
Ending balance 60,690,000 [1],[2],[5],[8],[9] $ 60,843,000 [3],[4],[10],[11],[14]
Investment, Identifier [Axis]: NAVEX TopCo, Inc., Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 5,394,000 5,394,000
Fair Value $ 0 $ 0
Investment, Identifier [Axis]: NC Ocala Co-Invest Beta, L.P. - LP Interest    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.05% [1],[2],[8] 0.06% [3],[4],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[14] $ 3,368,000  
Ending balance $ 3,197,000 [1],[2],[8] $ 3,368,000 [3],[4],[14]
Investment, Identifier [Axis]: NDC Acquisition Corp    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[8],[9],[15] 0.21%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[8],[9],[15] $ 13,250,000  
Investment, Identifier [Axis]: NDC Acquisition Corp.    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[11],[14],[18]   0.22%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[11],[14],[18] 13,285,000  
Ending balance [3],[4],[11],[14],[18]   $ 13,285,000
Investment, Identifier [Axis]: NDC Acquisition Corp., Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 3,425,000 3,425,000
Fair Value $ 0 $ 0
Investment, Identifier [Axis]: NMC Crimson Holdings, Inc 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[5],[8] 1.14%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[5],[8] $ 71,173,000  
Investment, Identifier [Axis]: NMC Crimson Holdings, Inc. 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[10],[14]   1.17%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[14] $ 71,173,000  
Ending balance [3],[4],[10],[14]   $ 71,173,000
Investment, Identifier [Axis]: NMC Crimson Holdings, Inc. 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.24% [1],[2],[5],[8] 0.24% [3],[4],[10],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[14] $ 14,758,000  
Ending balance $ 14,758,000 [1],[2],[5],[8] $ 14,758,000 [3],[4],[10],[14]
Investment, Identifier [Axis]: NSI Parent, LP - Class A Common Units    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[8] 0.01%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[8] $ 579,000  
Investment, Identifier [Axis]: Navigator Acquiror, Inc    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[8],[9],[22] 3.67%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[8],[9],[22] $ 229,343,000  
Investment, Identifier [Axis]: Navigator Acquiror, Inc.    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[11],[14],[28]   3.54%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[11],[14],[28] 214,831,000  
Ending balance [3],[4],[11],[14],[28]   $ 214,831,000
Investment, Identifier [Axis]: Navigator Acquiror, Inc., Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments   8,249,000
Fair Value   $ 0
Investment, Identifier [Axis]: Navigator Acquiror, Inc., Delayed Draw Term Loan 1    
Schedule of Investments [Line Items]    
Unfunded commitments 7,762,000  
Fair Value 0  
Investment, Identifier [Axis]: Navigator Acquiror, Inc., Delayed Draw Term Loan 2    
Schedule of Investments [Line Items]    
Unfunded commitments 7,762,000  
Fair Value $ 0  
Investment, Identifier [Axis]: Ncp Helix Holdings, LLC - Preferred Shares    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[8] 0.01%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[8] $ 471,000  
Investment, Identifier [Axis]: Ncp Helix Holdings, LLC. - Preferred Shares    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[14]   0.01%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[14] $ 537,000  
Ending balance [3],[4],[14]   $ 537,000
Investment, Identifier [Axis]: Nephele III BV    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[6],[7],[8],[9],[17] 0.00%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[6],[7],[8],[9],[17] $ 312,000  
Investment, Identifier [Axis]: Nephele III BV, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 28,000  
Fair Value $ 0  
Investment, Identifier [Axis]: Neptune BidCo SAS    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.11% [1],[2],[6],[7],[8],[9],[17] 0.11% [3],[4],[11],[12],[13],[14],[18]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[11],[12],[13],[14],[18] $ 6,525,000  
Ending balance 6,937,000 [1],[2],[6],[7],[8],[9],[17] $ 6,525,000 [3],[4],[11],[12],[13],[14],[18]
Investment, Identifier [Axis]: Neptune BidCo SAS, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 2,051,000 2,051,000
Fair Value $ 0 $ 0
Investment, Identifier [Axis]: Neptune Holdings, Inc    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[5],[8],[9] 0.11%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[5],[8],[9] $ 6,889,000  
Investment, Identifier [Axis]: Neptune Holdings, Inc.    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[10],[11],[14]   0.11%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[11],[14] 6,924,000  
Ending balance [3],[4],[10],[11],[14]   $ 6,924,000
Investment, Identifier [Axis]: Neptune Holdings, Inc., Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 933,000 933,000
Fair Value (23,000) $ (23,000)
Investment, Identifier [Axis]: Netsmart Technologies Inc    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[10],[11],[14]   0.54%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[11],[14] $ 32,611,000  
Ending balance [3],[4],[10],[11],[14]   $ 32,611,000
Investment, Identifier [Axis]: Netsmart Technologies Inc    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[8],[9] 0.53%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[8],[9] $ 33,012,000  
Investment, Identifier [Axis]: Netsmart Technologies Inc, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 4,345,000 4,345,000
Fair Value (22,000) (22,000)
Investment, Identifier [Axis]: Netsmart Technologies Inc, Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 4,432,000 4,432,000
Fair Value $ 0 $ (22,000)
Investment, Identifier [Axis]: Nintex Topco Limited    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.50% [1],[2],[6],[8],[17] 0.52% [3],[4],[12],[14],[18]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[12],[14],[18] $ 31,654,000  
Ending balance $ 31,342,000 [1],[2],[6],[8],[17] $ 31,654,000 [3],[4],[12],[14],[18]
Investment, Identifier [Axis]: Noble Midco 3 Ltd    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.27% [1],[2],[5],[6],[7],[8],[9] 0.28% [3],[4],[10],[11],[12],[13],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[11],[12],[13],[14] $ 16,772,000  
Ending balance 16,966,000 [1],[2],[5],[6],[7],[8],[9] $ 16,772,000 [3],[4],[10],[11],[12],[13],[14]
Investment, Identifier [Axis]: Noble Midco 3 Ltd, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 3,875,000 3,875,000
Fair Value (19,000) (19,000)
Investment, Identifier [Axis]: Noble Midco 3 Ltd, Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 2,390,000 2,583,000
Fair Value 0 0
Investment, Identifier [Axis]: North Haven Stallone Buyer, LLC, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 511,000 511,000
Fair Value (1,000) (1,000)
Investment, Identifier [Axis]: North Haven Stallone Buyer, LLC, Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 913,000 913,000
Fair Value $ (2,000) $ (2,000)
Investment, Identifier [Axis]: North Haven Ushc Acquisition Inc 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.03% [1],[2],[8],[9],[15] 0.02% [3],[4],[11],[13],[14],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[11],[13],[14],[16] $ 1,432,000  
Ending balance $ 1,827,000 [1],[2],[8],[9],[15] $ 1,432,000 [3],[4],[11],[13],[14],[16]
Investment, Identifier [Axis]: North Haven Ushc Acquisition Inc 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.03% [1],[2],[7],[8],[15] 0.04% [3],[4],[13],[14],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[13],[14],[16] $ 2,183,000  
Ending balance $ 2,182,000 [1],[2],[7],[8],[15] $ 2,183,000 [3],[4],[13],[14],[16]
Investment, Identifier [Axis]: North Haven Ushc Acquisition Inc 3    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.02% [1],[2],[7],[8],[15] 0.02% [3],[4],[13],[14],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[13],[14],[16] $ 1,278,000  
Ending balance $ 1,278,000 [1],[2],[7],[8],[15] $ 1,278,000 [3],[4],[13],[14],[16]
Investment, Identifier [Axis]: North Haven Ushc Acquisition Inc 4    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.01% [1],[2],[7],[8],[15] 0.01% [3],[4],[13],[14],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[13],[14],[16] $ 544,000  
Ending balance $ 544,000 [1],[2],[7],[8],[15] $ 544,000 [3],[4],[13],[14],[16]
Investment, Identifier [Axis]: North Haven Ushc Acquisition Inc 5    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.01% [1],[2],[7],[8],[9],[15] 0.01% [3],[4],[11],[13],[14],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[11],[13],[14],[16] $ 751,000  
Ending balance $ 751,000 [1],[2],[7],[8],[9],[15] $ 751,000 [3],[4],[11],[13],[14],[16]
Investment, Identifier [Axis]: North Haven Ushc Acquisition Inc 6    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.01% [1],[2],[7],[8],[15] 0.01% [3],[4],[13],[14],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[13],[14],[16] $ 632,000  
Ending balance $ 632,000 [1],[2],[7],[8],[15] $ 632,000 [3],[4],[13],[14],[16]
Investment, Identifier [Axis]: North Haven Ushc Acquisition Inc 7    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.06% [1],[2],[7],[8],[15] 0.06% [3],[4],[13],[14],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[13],[14],[16] $ 3,893,000  
Ending balance 3,893,000 [1],[2],[7],[8],[15] $ 3,893,000 [3],[4],[13],[14],[16]
Investment, Identifier [Axis]: North Haven Ushc Acquisition Inc, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 4,544,000 4,544,000
Fair Value 0 0
Investment, Identifier [Axis]: North Haven Ushc Acquisition Inc, Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 1,161,000 1,548,000
Fair Value $ 0 $ 0
Investment, Identifier [Axis]: OHCP V TC COI, LP. - LP Interest    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.13% [1],[2],[8] 0.13% [3],[4],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[14] $ 8,085,000  
Ending balance $ 8,260,000 [1],[2],[8] $ 8,085,000 [3],[4],[14]
Investment, Identifier [Axis]: Odevo AB 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.00% [1],[2],[6],[7],[8],[17] 0.00% [3],[4],[11],[12],[13],[14],[18]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[11],[12],[13],[14],[18] $ 258,000  
Ending balance $ 270,000 [1],[2],[6],[7],[8],[17] $ 258,000 [3],[4],[11],[12],[13],[14],[18]
Investment, Identifier [Axis]: Odevo AB 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.05% [1],[2],[6],[7],[8],[17] 0.05% [3],[4],[12],[13],[14],[18]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[12],[13],[14],[18] $ 2,759,000  
Ending balance $ 2,847,000 [1],[2],[6],[7],[8],[17] $ 2,759,000 [3],[4],[12],[13],[14],[18]
Investment, Identifier [Axis]: Odevo AB 3    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.14% [1],[2],[6],[7],[8],[17] 0.13% [3],[4],[12],[13],[14],[18]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[12],[13],[14],[18] $ 8,180,000  
Ending balance $ 9,004,000 [1],[2],[6],[7],[8],[17] $ 8,180,000 [3],[4],[12],[13],[14],[18]
Investment, Identifier [Axis]: Odevo AB 4    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.45% [1],[2],[6],[7],[8],[9],[17] 0.46% [3],[4],[11],[12],[13],[14],[18]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[11],[12],[13],[14],[18] $ 28,018,000  
Ending balance 28,014,000 [1],[2],[6],[7],[8],[9],[17] $ 28,018,000 [3],[4],[11],[12],[13],[14],[18]
Investment, Identifier [Axis]: Odevo AB, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 32,980,000 32,508,000
Fair Value $ (83,000) $ (80,000)
Investment, Identifier [Axis]: Onex Baltimore Buyer, Inc. 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.17% [1],[2],[5],[8],[24] 0.18% [3],[4],[14],[16],[26]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[14],[16],[26] $ 10,804,000  
Ending balance $ 10,804,000 [1],[2],[5],[8],[24] $ 10,804,000 [3],[4],[14],[16],[26]
Investment, Identifier [Axis]: Onex Baltimore Buyer, Inc. 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.24% [1],[2],[8],[9],[15],[24] 0.24% [3],[4],[11],[16],[26]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[11],[16],[26] $ 14,746,000  
Ending balance 14,724,000 [1],[2],[8],[9],[15],[24] $ 14,746,000 [3],[4],[11],[16],[26]
Investment, Identifier [Axis]: Onex Baltimore Buyer, Inc., Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 4,472,000 4,472,000
Fair Value $ 0 $ 0
Investment, Identifier [Axis]: Optimizely North America Inc 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.02% [1],[2],[5],[7],[8] 0.02% [3],[4],[10],[13],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[13],[14] $ 1,072,000  
Ending balance $ 1,106,000 [1],[2],[5],[7],[8] $ 1,072,000 [3],[4],[10],[13],[14]
Investment, Identifier [Axis]: Optimizely North America Inc 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.05% [1],[2],[5],[7],[8] 0.05% [3],[4],[10],[13],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[13],[14] $ 2,956,000  
Ending balance $ 3,085,000 [1],[2],[5],[7],[8] $ 2,956,000 [3],[4],[10],[13],[14]
Investment, Identifier [Axis]: Optimizely North America Inc 3    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.13% [1],[2],[5],[7],[8],[9] 0.13% [3],[4],[10],[11],[13],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[11],[13],[14] $ 8,120,000  
Ending balance 8,120,000 [1],[2],[5],[7],[8],[9] $ 8,120,000 [3],[4],[10],[11],[13],[14]
Investment, Identifier [Axis]: Optimizely North America Inc, Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 1,218,000 1,218,000
Fair Value (12,000) $ (12,000)
Investment, Identifier [Axis]: Oranje Holdco Inc 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[11],[13],[14],[16]   0.03%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[11],[13],[14],[16] 2,000,000  
Ending balance [3],[4],[11],[13],[14],[16]   $ 2,000,000
Investment, Identifier [Axis]: Oranje Holdco Inc 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[14]   0.56%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[14] $ 33,969,000  
Ending balance [3],[4],[14]   $ 33,969,000
Investment, Identifier [Axis]: Oranje Holdco Inc, Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments   250,000
Fair Value   $ 0
Investment, Identifier [Axis]: Oranje Holdco, Inc. 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[7],[8],[9],[15] 0.03%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[7],[8],[9],[15] $ 2,000,000  
Investment, Identifier [Axis]: Oranje Holdco, Inc. 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[8],[15] 0.54%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[8],[15] $ 33,969,000  
Investment, Identifier [Axis]: Oranje Holdco, Inc., Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 250,000  
Fair Value $ 0  
Investment, Identifier [Axis]: Other Cash and Cash Equivalents    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 10.16% [1],[2] 3.25% [3],[4]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4] $ 197,359,000  
Ending balance $ 634,048,000 [1],[2] $ 197,359,000 [3],[4]
Investment, Identifier [Axis]: Oxford Global Resources Inc 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.30% [1],[2],[8],[15] 0.31% [3],[4],[11],[14],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[11],[14],[16] $ 18,774,000  
Ending balance $ 18,725,000 [1],[2],[8],[15] $ 18,774,000 [3],[4],[11],[14],[16]
Investment, Identifier [Axis]: Oxford Global Resources Inc 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.05% [1],[2],[8],[9],[15] 0.05% [3],[4],[14],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[14],[16] $ 2,909,000  
Ending balance $ 2,907,000 [1],[2],[8],[9],[15] $ 2,909,000 [3],[4],[14],[16]
Investment, Identifier [Axis]: Oxford Global Resources Inc 3    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.04% [1],[2],[8],[22] 0.04% [3],[4],[14],[28]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[14],[28] $ 2,217,000  
Ending balance 2,211,000 [1],[2],[8],[22] $ 2,217,000 [3],[4],[14],[28]
Investment, Identifier [Axis]: Oxford Global Resources Inc, Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 3,085,000 3,085,000
Fair Value 0 $ 0
Investment, Identifier [Axis]: PDI TA Holdings, Inc.    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[10],[11],[14]   0.69%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[11],[14] $ 41,760,000  
Ending balance [3],[4],[10],[11],[14]   $ 41,760,000
Investment, Identifier [Axis]: PDI TA Holdings, Inc. 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[8] 0.70%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[8] $ 43,815,000  
Investment, Identifier [Axis]: PDI TA Holdings, Inc. 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[5],[8],[9] 0.07%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[5],[8],[9] $ 4,342,000  
Investment, Identifier [Axis]: PDI TA Holdings, Inc., Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments   3,835,000
Fair Value   0
Investment, Identifier [Axis]: PDI TA Holdings, Inc., Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 3,293,000 3,800,000
Fair Value 0 $ (29,000)
Investment, Identifier [Axis]: PKF O'Connor Davies Advisory, LLC    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[10],[11],[13],[14]   0.02%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[11],[13],[14] $ 1,034,000  
Ending balance [3],[4],[10],[11],[13],[14]   $ 1,034,000
Investment, Identifier [Axis]: PKF O'Connor Davies Advisory, LLC    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[5],[7],[8],[9] 0.02%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[5],[7],[8],[9] $ 1,040,000  
Investment, Identifier [Axis]: PKF O'Connor Davies Advisory, LLC, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 504,000 504,000
Fair Value (3,000) 0
Investment, Identifier [Axis]: PKF O'Connor Davies Advisory, LLC, Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 141,000 141,000
Fair Value $ (1,000) $ (1,000)
Investment, Identifier [Axis]: PPT Holdings III, LLC    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.03% [1],[2],[7],[8],[17] 0.03% [3],[4],[13],[14],[18]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[13],[14],[18] $ 1,767,000  
Ending balance $ 1,823,000 [1],[2],[7],[8],[17] $ 1,767,000 [3],[4],[13],[14],[18]
Investment, Identifier [Axis]: PPV Intermediate Holdings, LLC 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.03% [1],[2],[5],[7],[8] 0.03% [3],[4],[10],[13],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[13],[14] $ 1,977,000  
Ending balance $ 1,972,000 [1],[2],[5],[7],[8] $ 1,977,000 [3],[4],[10],[13],[14]
Investment, Identifier [Axis]: PPV Intermediate Holdings, LLC 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.00% [1],[2],[5],[7],[8],[9] 0.00% [3],[4],[10],[11],[13],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[11],[13],[14] $ 76,000  
Ending balance 199,000 [1],[2],[5],[7],[8],[9] $ 76,000 [3],[4],[10],[11],[13],[14]
Investment, Identifier [Axis]: PPV Intermediate Holdings, LLC, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 187,000 309,000
Fair Value 0 (2,000)
Investment, Identifier [Axis]: PPV Intermediate Holdings, LLC, Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 159,000 159,000
Fair Value 0 $ 0
Investment, Identifier [Axis]: PT Intermediate Holdings III, LLC    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[11],[14],[28]   1.01%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[11],[14],[28] $ 61,437,000  
Ending balance [3],[4],[11],[14],[28]   $ 61,437,000
Investment, Identifier [Axis]: PT Intermediate Holdings III, LLC    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[5],[8],[9] 0.99%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[5],[8],[9] $ 61,681,000  
Investment, Identifier [Axis]: PT Intermediate Holdings III, LLC, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 4,338,000 4,338,000
Fair Value $ (5,000) $ (5,000)
Investment, Identifier [Axis]: Paisley Bidco Ltd 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[6],[7],[8],[17] 0.13%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[6],[7],[8],[17] $ 8,248,000  
Investment, Identifier [Axis]: Paisley Bidco Ltd 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[11],[12],[13],[14],[18]   0.11%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[11],[12],[13],[14],[18] $ 6,438,000  
Ending balance [3],[4],[11],[12],[13],[14],[18]   $ 6,438,000
Investment, Identifier [Axis]: Paisley Bidco Ltd 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.06% [1],[2],[6],[7],[8],[17] 0.06% [3],[4],[12],[13],[14],[18]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[12],[13],[14],[18] $ 3,507,000  
Ending balance $ 3,661,000 [1],[2],[6],[7],[8],[17] $ 3,507,000 [3],[4],[12],[13],[14],[18]
Investment, Identifier [Axis]: Paisley Bidco Ltd 3    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.05% [1],[2],[6],[7],[8],[17] 0.05% [3],[4],[12],[13],[14],[18]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[12],[13],[14],[18] $ 3,093,000  
Ending balance $ 3,229,000 [1],[2],[6],[7],[8],[17] $ 3,093,000 [3],[4],[12],[13],[14],[18]
Investment, Identifier [Axis]: Paisley Bidco Ltd, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments   1,563,000
Fair Value   $ (12,000)
Investment, Identifier [Axis]: Paramount Global Surfaces Inc    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[8],[15] 0.76%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[8],[15] $ 47,436,000  
Investment, Identifier [Axis]: Park Place Technologies, LLC 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 1.81% [1],[2],[5],[8] 1.86% [3],[4],[10],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[14] $ 112,936,000  
Ending balance $ 112,970,000 [1],[2],[5],[8] $ 112,936,000 [3],[4],[10],[14]
Investment, Identifier [Axis]: Park Place Technologies, LLC 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.05% [1],[2],[5],[7],[8],[9] 0.06% [3],[4],[10],[11],[13],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[11],[13],[14] $ 3,698,000  
Ending balance $ 3,109,000 [1],[2],[5],[7],[8],[9] $ 3,698,000 [3],[4],[10],[11],[13],[14]
Investment, Identifier [Axis]: Park Place Technologies, LLC 3    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[5],[7],[8],[9] 0.15%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[5],[7],[8],[9] $ 9,084,000  
Investment, Identifier [Axis]: Park Place Technologies, LLC, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 8,617,000 17,767,000
Fair Value 0 (89,000)
Investment, Identifier [Axis]: Park Place Technologies, LLC, Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 10,216,000 9,505,000
Fair Value $ 0 $ 0
Investment, Identifier [Axis]: Patriot Growth Insurance Services, LLC 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[5],[7],[8] 0.07%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[5],[7],[8] $ 4,532,000  
Investment, Identifier [Axis]: Patriot Growth Insurance Services, LLC 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[5],[7],[8],[9] 0.05%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[5],[7],[8],[9] $ 2,974,000  
Investment, Identifier [Axis]: Patriot Growth Insurance Services, LLC 3    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[5],[7],[8],[9] 0.00%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[5],[7],[8],[9] $ 225,000  
Investment, Identifier [Axis]: Patriot Growth Insurance Services, LLC. 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[10],[13],[14]   0.07%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[13],[14] 4,544,000  
Ending balance [3],[4],[10],[13],[14]   $ 4,544,000
Investment, Identifier [Axis]: Patriot Growth Insurance Services, LLC. 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[10],[11],[13],[14]   0.05%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[11],[13],[14] 2,979,000  
Ending balance [3],[4],[10],[11],[13],[14]   $ 2,979,000
Investment, Identifier [Axis]: Patriot Growth Insurance Services, LLC. 3    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[10],[11],[13]   0.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[11],[13] 225,000  
Ending balance [3],[4],[10],[11],[13]   $ 225,000
Investment, Identifier [Axis]: Patriot Growth Insurance Services, LLC., Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 1,275,000 1,275,000
Fair Value 0 0
Investment, Identifier [Axis]: Patriot Growth Insurance Services, LLC., Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 235,000 235,000
Fair Value $ 0 $ 0
Investment, Identifier [Axis]: Pavion Corp. 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 1.17% [1],[2],[5],[6],[8] 1.26% [3],[4],[10],[12],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[12],[14] $ 76,409,000  
Ending balance $ 72,977,000 [1],[2],[5],[6],[8] $ 76,409,000 [3],[4],[10],[12],[14]
Investment, Identifier [Axis]: Pavion Corp. 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.25% [1],[2],[5],[6],[8],[9] 0.26% [3],[4],[10],[11],[12],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[11],[12],[14] $ 15,497,000  
Ending balance 15,406,000 [1],[2],[5],[6],[8],[9] $ 15,497,000 [3],[4],[10],[11],[12],[14]
Investment, Identifier [Axis]: Pavion Corp., Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 2,559,000 2,559,000
Fair Value 0 $ 0
Investment, Identifier [Axis]: Petrus Buyer Inc 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[5],[7],[14]   0.03%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[7],[14] 1,871,000  
Ending balance [3],[4],[5],[7],[14]   $ 1,871,000
Investment, Identifier [Axis]: Petrus Buyer Inc 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[10],[11],[13],[14]   0.01%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[11],[13],[14] $ 335,000  
Ending balance [3],[4],[10],[11],[13],[14]   $ 335,000
Investment, Identifier [Axis]: Petrus Buyer Inc, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments   260,000
Fair Value   0
Investment, Identifier [Axis]: Petrus Buyer Inc, Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments   272,000
Fair Value   $ 0
Investment, Identifier [Axis]: Petrus Buyer, Inc. 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[5],[7],[8] 0.03%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[5],[7],[8] $ 1,867,000  
Investment, Identifier [Axis]: Petrus Buyer, Inc. 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[5],[8],[9] 0.01%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[5],[8],[9] $ 330,000  
Investment, Identifier [Axis]: Petrus Buyer, Inc. 3    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[5],[7],[8] 0.01%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[5],[7],[8] $ 645,000  
Investment, Identifier [Axis]: Petrus Buyer, Inc., Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 260,000  
Fair Value 0  
Investment, Identifier [Axis]: Petrus Buyer, Inc., Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 272,000  
Fair Value $ 0  
Investment, Identifier [Axis]: Phoenix 1 Buyer Corp    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[5],[8],[9] 0.41%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[5],[8],[9] $ 25,688,000  
Investment, Identifier [Axis]: Phoenix 1 Buyer Corp.    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[10],[11],[14]   0.42%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[11],[14] 25,753,000  
Ending balance [3],[4],[10],[11],[14]   $ 25,753,000
Investment, Identifier [Axis]: Phoenix 1 Buyer Corp., Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 5,009,000 5,009,000
Fair Value $ 0 $ 0
Investment, Identifier [Axis]: Ping Identity Holding Corp    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.11% [1],[2],[5],[7],[8],[9] 0.11% [3],[4],[10],[11],[13],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[11],[13],[14] $ 6,691,000  
Ending balance 6,674,000 [1],[2],[5],[7],[8],[9] $ 6,691,000 [3],[4],[10],[11],[13],[14]
Investment, Identifier [Axis]: Ping Identity Holding Corp, Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 671,000 671,000
Fair Value 0 $ 0
Investment, Identifier [Axis]: Point Broadband Acquisition, LLC    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[11],[14],[16]   2.04%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[11],[14],[16] $ 123,684,000  
Ending balance [3],[4],[11],[14],[16]   $ 123,684,000
Investment, Identifier [Axis]: Point Broadband Acquisition, LLC    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[8],[9],[15] 1.97%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[8],[9],[15] $ 122,898,000  
Investment, Identifier [Axis]: Point Broadband Acquisition, LLC, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 36,397,000 36,397,000
Fair Value $ 0 $ (455,000)
Investment, Identifier [Axis]: Point Broadband Holdings, LLC - Class A Common Units    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.09% [1],[2],[8] 0.11% [3],[4],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[14] $ 6,483,000  
Ending balance $ 5,906,000 [1],[2],[8] $ 6,483,000 [3],[4],[14]
Investment, Identifier [Axis]: Point Broadband Holdings, LLC - Class Additional A Common Units    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.02% [1],[2],[8] 0.02% [3],[4],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[14] $ 1,393,000  
Ending balance $ 1,269,000 [1],[2],[8] $ 1,393,000 [3],[4],[14]
Investment, Identifier [Axis]: Point Broadband Holdings, LLC - Class Additional B Common Units    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.00% [1],[2],[8] 0.09% [3],[4],[12],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[12],[14] $ 5,287,000  
Ending balance 136,000 [1],[2],[8] $ 5,287,000 [3],[4],[12],[14]
Investment, Identifier [Axis]: Point Broadband Holdings, LLC - Class Additional B Common Units 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[14]   0.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[14] $ 243,000  
Ending balance [3],[4],[14]   $ 243,000
Investment, Identifier [Axis]: Point Broadband Holdings, LLC - Class B Common Units    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.01% [1],[2],[8] 0.02% [3],[4],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[14] $ 1,130,000  
Ending balance 631,000 [1],[2],[8] $ 1,130,000 [3],[4],[14]
Investment, Identifier [Axis]: Porcelain Acquisition Corp.    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[14],[16]   0.83%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[14],[16] $ 50,531,000  
Ending balance [3],[4],[14],[16]   $ 50,531,000
Investment, Identifier [Axis]: Profile Products, LLC 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.11% [1],[2],[5],[8] 0.12% [3],[4],[10],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[14] $ 7,001,000  
Ending balance $ 7,073,000 [1],[2],[5],[8] $ 7,001,000 [3],[4],[10],[14]
Investment, Identifier [Axis]: Profile Products, LLC 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.01% [1],[2],[5],[7],[8],[9] 0.00% [3],[4],[10],[11],[13],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[11],[13],[14] $ 88,000  
Ending balance $ 424,000 [1],[2],[5],[7],[8],[9] $ 88,000 [3],[4],[10],[11],[13],[14]
Investment, Identifier [Axis]: Profile Products, LLC 3    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.00% [1],[2],[5],[7],[8],[9] 0.00% [3],[4],[10],[11],[13],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[11],[13],[14] $ 9,000  
Ending balance 42,000 [1],[2],[5],[7],[8],[9] $ 9,000 [3],[4],[10],[11],[13],[14]
Investment, Identifier [Axis]: Profile Products, LLC, Revolver 1    
Schedule of Investments [Line Items]    
Unfunded commitments 324,000 353,000
Fair Value 0 0
Investment, Identifier [Axis]: Profile Products, LLC, Revolver 2    
Schedule of Investments [Line Items]    
Unfunded commitments 87,000 417,000
Fair Value $ 0 $ 0
Investment, Identifier [Axis]: Progress Residential PM Holdings, LLC 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 1.09% [1],[2],[5],[8] 1.12% [3],[4],[10],[11],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[11],[14] $ 67,900,000  
Ending balance $ 67,900,000 [1],[2],[5],[8] $ 67,900,000 [3],[4],[10],[11],[14]
Investment, Identifier [Axis]: Progress Residential PM Holdings, LLC 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.01% [1],[2],[5],[8],[9] 0.01% [3],[4],[10],[13],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[13],[14] $ 833,000  
Ending balance 833,000 [1],[2],[5],[8],[9] $ 833,000 [3],[4],[10],[13],[14]
Investment, Identifier [Axis]: Progress Residential PM Holdings, LLC, Delayed Draw Term Loan 1    
Schedule of Investments [Line Items]    
Unfunded commitments 16,623,000 16,623,000
Fair Value 0 0
Investment, Identifier [Axis]: Progress Residential PM Holdings, LLC, Delayed Draw Term Loan 2    
Schedule of Investments [Line Items]    
Unfunded commitments 333,000 333,000
Fair Value $ 0 $ 0
Investment, Identifier [Axis]: Project Ruby Ultimate Parent Corp    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.02% [1],[2],[5],[7],[8] 0.02% [3],[4],[10],[13],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[13],[14] $ 995,000  
Ending balance $ 998,000 [1],[2],[5],[7],[8] $ 995,000 [3],[4],[10],[13],[14]
Investment, Identifier [Axis]: Project Ruby Ultimate Parent Corp    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[17] 0.13%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[17] $ 8,274,000  
Investment, Identifier [Axis]: Project Ruby Ultimate Parent Corp 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[18]   0.14%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[18] $ 8,360,000  
Ending balance [3],[4],[18]   $ 8,360,000
Investment, Identifier [Axis]: Pye-Barker Fire & Safety, LLC 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [5] 0.07% [1],[2],[7],[8] 0.07% [3],[4],[10],[13],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[10],[13],[14] $ 4,461,000  
Ending balance [5] $ 4,461,000 [1],[2],[7],[8] $ 4,461,000 [3],[4],[10],[13],[14]
Investment, Identifier [Axis]: Pye-Barker Fire & Safety, LLC 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [5] 0.22% [1],[2],[7],[8] 0.23% [3],[4],[10],[13],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[10],[13],[14] $ 13,747,000  
Ending balance [5] 13,747,000 [1],[2],[7],[8] $ 13,747,000 [3],[4],[10],[13],[14]
Investment, Identifier [Axis]: QBS Parent Inc    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[10],[11],[13],[14]   0.15%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[11],[13],[14] $ 9,267,000  
Ending balance [3],[4],[10],[11],[13],[14]   $ 9,267,000
Investment, Identifier [Axis]: QBS Parent Inc, Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments   984,000
Fair Value   $ (5,000)
Investment, Identifier [Axis]: QBS Parent, Inc. 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[5],[7],[8],[9] 0.15%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[5],[7],[8],[9] $ 9,291,000  
Investment, Identifier [Axis]: QBS Parent, Inc. 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[5],[8] 0.01%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[5],[8] $ 902,000  
Investment, Identifier [Axis]: QBS Parent, Inc., Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 984,000  
Fair Value $ (5,000)  
Investment, Identifier [Axis]: Qualus Power Services Corp 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[8],[15] 0.52%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[8],[15] $ 32,703,000  
Investment, Identifier [Axis]: Qualus Power Services Corp 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[8],[15] 0.57%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[8],[15] $ 35,387,000  
Investment, Identifier [Axis]: Qualus Power Services Corp 3    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[8],[9],[15] 1.13%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[8],[9],[15] $ 70,636,000  
Investment, Identifier [Axis]: Qualus Power Services Corp. 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[14],[16]   0.54%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[14],[16] 32,778,000  
Ending balance [3],[4],[14],[16]   $ 32,778,000
Investment, Identifier [Axis]: Qualus Power Services Corp. 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[14],[16]   0.58%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[14],[16] 35,439,000  
Ending balance [3],[4],[14],[16]   $ 35,439,000
Investment, Identifier [Axis]: Qualus Power Services Corp. 3    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[11],[14],[16]   1.17%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[11],[14],[16] 70,813,000  
Ending balance [3],[4],[11],[14],[16]   $ 70,813,000
Investment, Identifier [Axis]: Qualus Power Services Corp., Delayed Draw Term Loan 1    
Schedule of Investments [Line Items]    
Unfunded commitments 12,093,000 12,093,000
Fair Value 0 0
Investment, Identifier [Axis]: Qualus Power Services Corp., Delayed Draw Term Loan 2    
Schedule of Investments [Line Items]    
Unfunded commitments 33,748,000 33,748,000
Fair Value $ (169,000) $ (169,000)
Investment, Identifier [Axis]: R1 Holdings LLC    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[7],[8],[9],[15] 0.02%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[7],[8],[9],[15] $ 1,148,000  
Investment, Identifier [Axis]: R1 Holdings LLC, Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 177,000  
Fair Value $ 0  
Investment, Identifier [Axis]: RC VI Buckeye Holdings, LLC    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[8] 0.00%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[8] $ 161,000  
Investment, Identifier [Axis]: RFS Opco, LLC    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[11],[13],[14],[28]   0.16%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[11],[13],[14],[28] $ 9,491,000  
Ending balance [3],[4],[11],[13],[14],[28]   $ 9,491,000
Investment, Identifier [Axis]: RFS Opco, LLC    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[8],[9],[22] 0.16%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[8],[9],[22] $ 9,864,000  
Investment, Identifier [Axis]: RFS Opco, LLC, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 1,984,000 2,381,000
Fair Value $ 0 $ 0
Investment, Identifier [Axis]: RWL Holdings, LLC    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.43% [1],[2],[5],[8] 0.44% [3],[4],[10],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[14] $ 26,714,000  
Ending balance $ 26,646,000 [1],[2],[5],[8] $ 26,714,000 [3],[4],[10],[14]
Investment, Identifier [Axis]: Rally Buyer, Inc. 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.01% [1],[2],[5],[7],[8] 0.01% [3],[4],[10],[13],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[13],[14] $ 820,000  
Ending balance $ 818,000 [1],[2],[5],[7],[8] $ 820,000 [3],[4],[10],[13],[14]
Investment, Identifier [Axis]: Rally Buyer, Inc. 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.00% [1],[2],[5],[7],[8],[9] 0.00% [3],[4],[10],[11],[13],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[11],[13],[14] $ 77,000  
Ending balance 63,000 [1],[2],[5],[7],[8],[9] $ 77,000 [3],[4],[10],[11],[13],[14]
Investment, Identifier [Axis]: Rally Buyer, Inc., Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 38,000 25,000
Fair Value $ 0 $ 0
Investment, Identifier [Axis]: Razor Holdco, LLC    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.30% [1],[2],[5],[8] 0.60% [3],[4],[10],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[14] $ 36,593,000  
Ending balance $ 18,885,000 [1],[2],[5],[8] $ 36,593,000 [3],[4],[10],[14]
Investment, Identifier [Axis]: Red Fox CD Acquisition Corp    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 1.18% [1],[2],[8],[15] 1.28% [3],[4],[14],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[14],[16] $ 78,073,000  
Ending balance $ 73,827,000 [1],[2],[8],[15] $ 78,073,000 [3],[4],[14],[16]
Investment, Identifier [Axis]: Red Griffin ParentCo, LLC - Class A Common Units    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.05% [1],[2],[8] 0.05% [3],[4],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[14] $ 3,166,000  
Ending balance $ 2,931,000 [1],[2],[8] $ 3,166,000 [3],[4],[14]
Investment, Identifier [Axis]: Red River Technology, LLC    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 1.13% [1],[2],[8],[15] 1.24% [3],[4],[14],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[14],[16] $ 75,588,000  
Ending balance $ 70,483,000 [1],[2],[8],[15] $ 75,588,000 [3],[4],[14],[16]
Investment, Identifier [Axis]: Redwood Services Group, LLC 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 1.23% [1],[2],[5],[8] 0.08% [3],[4],[10],[13],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[13],[14] $ 4,641,000  
Ending balance $ 76,961,000 [1],[2],[5],[8] $ 4,641,000 [3],[4],[10],[13],[14]
Investment, Identifier [Axis]: Redwood Services Group, LLC 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 1.19% [1],[2],[5],[8],[9] 1.22% [3],[4],[10],[11],[13],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[11],[13],[14] $ 73,918,000  
Ending balance 74,520,000 [1],[2],[5],[8],[9] $ 73,918,000 [3],[4],[10],[11],[13],[14]
Investment, Identifier [Axis]: Redwood Services Group, LLC, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments   3,980,000
Fair Value   $ 0
Investment, Identifier [Axis]: Redwood Services Group, LLC, Delayed Draw Term Loan 1    
Schedule of Investments [Line Items]    
Unfunded commitments 3,929,000  
Fair Value 0  
Investment, Identifier [Axis]: Redwood Services Group, LLC, Delayed Draw Term Loan 2    
Schedule of Investments [Line Items]    
Unfunded commitments 25,154,000  
Fair Value $ (126,000)  
Investment, Identifier [Axis]: Relativity ODA, LLC    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.31% [1],[2],[8],[9],[15] 0.32% [3],[4],[14],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[14],[16] $ 19,251,000  
Ending balance 19,204,000 [1],[2],[8],[9],[15] $ 19,251,000 [3],[4],[14],[16]
Investment, Identifier [Axis]: Relativity ODA, LLC, Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 2,966,000 2,966,000
Fair Value (74,000) $ (74,000)
Investment, Identifier [Axis]: RoadOne Inc    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[11],[13],[14],[16]   0.02%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[11],[13],[14],[16] $ 1,109,000  
Ending balance [3],[4],[11],[13],[14],[16]   $ 1,109,000
Investment, Identifier [Axis]: RoadOne Inc, Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments   226,000
Fair Value   $ 0
Investment, Identifier [Axis]: Roadsafe Holdings, Inc. 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.50% [1],[2],[8],[15] 0.53% [3],[4],[14],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[14],[16] $ 32,093,000  
Ending balance $ 31,513,000 [1],[2],[8],[15] $ 32,093,000 [3],[4],[14],[16]
Investment, Identifier [Axis]: Roadsafe Holdings, Inc. 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.31% [1],[2],[8],[15] 0.33% [3],[4],[14],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[14],[16] $ 19,770,000  
Ending balance $ 19,459,000 [1],[2],[8],[15] $ 19,770,000 [3],[4],[14],[16]
Investment, Identifier [Axis]: Roadsafe Holdings, Inc. 3    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.06% [1],[2],[8],[15] 0.07% [3],[4],[14],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[14],[16] $ 4,032,000  
Ending balance $ 3,967,000 [1],[2],[8],[15] $ 4,032,000 [3],[4],[14],[16]
Investment, Identifier [Axis]: Roadsafe Holdings, Inc. 4    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.02% [1],[2],[7],[8],[15] 0.02% [3],[4],[13],[14],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[13],[14],[16] $ 1,198,000  
Ending balance 1,179,000 [1],[2],[7],[8],[15] $ 1,198,000 [3],[4],[13],[14],[16]
Investment, Identifier [Axis]: Rocky MRA Acquisition Corp    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[13],[14],[28]   0.15%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[13],[14],[28] $ 9,253,000  
Ending balance [3],[4],[13],[14],[28]   $ 9,253,000
Investment, Identifier [Axis]: Rocky MRA Acquisition Corp    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[8],[22] 0.15%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[8],[22] $ 9,253,000  
Investment, Identifier [Axis]: SEKO Global Logistics Network, LLC 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.00% [1],[2],[7],[8],[15] 0.00% [3],[4],[11],[13],[14],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[11],[13],[14],[16] $ 124,000  
Ending balance $ 139,000 [1],[2],[7],[8],[15] $ 124,000 [3],[4],[11],[13],[14],[16]
Investment, Identifier [Axis]: SEKO Global Logistics Network, LLC 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.00% [1],[2],[7],[8],[15] 0.00% [3],[4],[13],[14],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[13],[14],[16] $ 78,000  
Ending balance $ 78,000 [1],[2],[7],[8],[15] $ 78,000 [3],[4],[13],[14],[16]
Investment, Identifier [Axis]: SEKO Global Logistics Network, LLC 3    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.03% [1],[2],[7],[8],[15] 0.03% [3],[4],[13],[14],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[13],[14],[16] $ 1,958,000  
Ending balance $ 1,953,000 [1],[2],[7],[8],[15] $ 1,958,000 [3],[4],[13],[14],[16]
Investment, Identifier [Axis]: SEKO Global Logistics Network, LLC 4    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.01% [1],[2],[7],[8],[15] 0.01% [3],[4],[13],[14],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[13],[14],[16] $ 413,000  
Ending balance $ 412,000 [1],[2],[7],[8],[15] $ 413,000 [3],[4],[13],[14],[16]
Investment, Identifier [Axis]: SEKO Global Logistics Network, LLC, Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments   15,000
Fair Value   $ 0
Investment, Identifier [Axis]: SG Acquisition, Inc    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[5],[8],[9] 2.10%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[5],[8],[9] $ 130,811,000  
Investment, Identifier [Axis]: SG Acquisition, Inc.    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[10],[11],[14]   2.18%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[11],[14] 132,471,000  
Ending balance [3],[4],[10],[11],[14]   $ 132,471,000
Investment, Identifier [Axis]: SG Acquisition, Inc., Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 8,301,000 8,301,000
Fair Value $ 0 $ 0
Investment, Identifier [Axis]: SQ ABS Issuer LLC    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[6],[7],[8],[17] 0.06%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[6],[7],[8],[17] $ 3,783,000  
Investment, Identifier [Axis]: SQ ABS Issuer LLC    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[6],[7],[8],[17] 0.09%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[6],[7],[8],[17] $ 5,689,000  
Investment, Identifier [Axis]: SQ ABS Issuer LLC 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[12],[13],[14],[18]   0.10%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[12],[13],[14],[18] 6,031,000  
Ending balance [3],[4],[12],[13],[14],[18]   $ 6,031,000
Investment, Identifier [Axis]: SQ ABS Issuer LLC 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[12],[13],[14],[18]   0.07%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[12],[13],[14],[18] $ 3,995,000  
Ending balance [3],[4],[12],[13],[14],[18]   $ 3,995,000
Investment, Identifier [Axis]: STV Group, Inc. 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.39% [1],[2],[5],[8] 0.40% [3],[4],[10],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[14] $ 24,234,000  
Ending balance $ 24,173,000 [1],[2],[5],[8] $ 24,234,000 [3],[4],[10],[14]
Investment, Identifier [Axis]: STV Group, Inc. 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.02% [1],[2],[5],[7],[8],[9] 0.01% [3],[4],[10],[11],[13],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[11],[13],[14] $ 628,000  
Ending balance 977,000 [1],[2],[5],[7],[8],[9] $ 628,000 [3],[4],[10],[11],[13],[14]
Investment, Identifier [Axis]: STV Group, Inc., Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 6,976,000 6,976,000
Fair Value (70,000) (70,000)
Investment, Identifier [Axis]: STV Group, Inc., Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 3,837,000 4,186,000
Fair Value $ 0 $ 0
Investment, Identifier [Axis]: Safety Borrower Holdings LP 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.08% [1],[2],[8],[15] 0.09% [3],[4],[13],[14],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[13],[14],[16] $ 5,256,000  
Ending balance $ 5,243,000 [1],[2],[8],[15] $ 5,256,000 [3],[4],[13],[14],[16]
Investment, Identifier [Axis]: Safety Borrower Holdings LP 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.00% [1],[2],[7],[8],[9],[15] 0.00% [3],[4],[11],[13],[14],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[11],[13],[14],[16] $ 89,000  
Ending balance 89,000 [1],[2],[7],[8],[9],[15] $ 89,000 [3],[4],[11],[13],[14],[16]
Investment, Identifier [Axis]: Safety Borrower Holdings LP, Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 280,000 280,000
Fair Value $ 0 $ 0
Investment, Identifier [Axis]: Sam Holding Co, Inc. 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.59% [1],[2],[8],[15] 0.61% [3],[4],[14],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[14],[16] $ 36,764,000  
Ending balance $ 36,717,000 [1],[2],[8],[15] $ 36,764,000 [3],[4],[14],[16]
Investment, Identifier [Axis]: Sam Holding Co, Inc. 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.25% [1],[2],[8],[15] 0.26% [3],[4],[14],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[14],[16] $ 15,798,000  
Ending balance $ 15,760,000 [1],[2],[8],[15] $ 15,798,000 [3],[4],[14],[16]
Investment, Identifier [Axis]: Sam Holding Co, Inc. 3    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.18% [1],[2],[8],[15] 0.19% [3],[4],[14],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[14],[16] $ 11,406,000  
Ending balance $ 11,374,000 [1],[2],[8],[15] $ 11,406,000 [3],[4],[14],[16]
Investment, Identifier [Axis]: Sam Holding Co, Inc. 4    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.16% [1],[2],[8],[15] 0.16% [3],[4],[14],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[14],[16] $ 9,951,000  
Ending balance $ 9,945,000 [1],[2],[8],[15] $ 9,951,000 [3],[4],[14],[16]
Investment, Identifier [Axis]: Sam Holding Co, Inc. 5    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.03% [1],[2],[7],[8],[9],[15] 0.03% [3],[4],[11],[13],[14],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[11],[13],[14],[16] $ 1,800,000  
Ending balance $ 1,600,000 [1],[2],[7],[8],[9],[15] $ 1,800,000 [3],[4],[11],[13],[14],[16]
Investment, Identifier [Axis]: Sam Holding Co, Inc. 6    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.13% [1],[2],[7],[8],[9],[15] 0.10% [3],[4],[11],[13],[14],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[11],[13],[14],[16] $ 5,980,000  
Ending balance 8,084,000 [1],[2],[7],[8],[9],[15] $ 5,980,000 [3],[4],[11],[13],[14],[16]
Investment, Identifier [Axis]: Sam Holding Co, Inc., Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 3,800,000 5,900,000
Fair Value 0 0
Investment, Identifier [Axis]: Sam Holding Co, Inc., Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 4,400,000 4,200,000
Fair Value $ 0 $ 0
Investment, Identifier [Axis]: Scorpio BidCo SAS    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.39% [1],[2],[6],[7],[8],[9],[17] 0.38% [3],[4],[11],[12],[13],[14],[18]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[11],[12],[13],[14],[18] $ 23,362,000  
Ending balance 24,634,000 [1],[2],[6],[7],[8],[9],[17] $ 23,362,000 [3],[4],[11],[12],[13],[14],[18]
Investment, Identifier [Axis]: Scorpio BidCo SAS, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 4,386,000 4,386,000
Fair Value (48,000) $ (46,000)
Investment, Identifier [Axis]: Seahawk Bidco, LLC    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[11],[14],[16]   0.66%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[11],[14],[16] $ 39,844,000  
Ending balance [3],[4],[11],[14],[16]   $ 39,844,000
Investment, Identifier [Axis]: Seahawk Bidco, LLC    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[8],[9],[15] 0.67%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[8],[9],[15] $ 41,929,000  
Investment, Identifier [Axis]: Seahawk Bidco, LLC, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments   12,511,000
Fair Value   0
Investment, Identifier [Axis]: Seahawk Bidco, LLC, Delayed Draw Term Loan 1    
Schedule of Investments [Line Items]    
Unfunded commitments 10,322,000  
Fair Value 0  
Investment, Identifier [Axis]: Seahawk Bidco, LLC, Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments   3,753,000
Fair Value   $ (34,000)
Investment, Identifier [Axis]: Seahawk Bidco, LLC, Revolver 1    
Schedule of Investments [Line Items]    
Unfunded commitments 3,753,000  
Fair Value $ (34,000)  
Investment, Identifier [Axis]: SelectQuote Inc    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[6],[7],[8],[30] 0.53%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[6],[7],[8],[30] $ 32,833,000  
Investment, Identifier [Axis]: SelectQuote Inc.    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[12],[13],[14],[31]   0.90%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[12],[13],[14],[31] $ 54,837,000  
Ending balance [3],[4],[12],[13],[14],[31]   $ 54,837,000
Investment, Identifier [Axis]: SelectQuote Inc. - Warrants    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.01% [1],[2],[6],[8] 0.01% [3],[4],[12],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[12],[14] $ 441,000  
Ending balance 439,000 [1],[2],[6],[8] $ 441,000 [3],[4],[12],[14]
Investment, Identifier [Axis]: Shelf Bidco Ltd    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[10],[12],[14],[26]   2.45%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[12],[14],[26] $ 149,131,000  
Ending balance [3],[4],[10],[12],[14],[26]   $ 149,131,000
Investment, Identifier [Axis]: Shelf Bidco Ltd    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[5],[6],[8],[24] 2.40%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[5],[6],[8],[24] $ 149,506,000  
Investment, Identifier [Axis]: Shelf Holdco Ltd - Common Equity    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.00% [1],[2],[6],[8] 0.00% [3],[4],[12],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[12],[14] $ 188,000  
Ending balance 190,000 [1],[2],[6],[8] $ 188,000 [3],[4],[12],[14]
Investment, Identifier [Axis]: Simplicity Financial Marketing Group Holdings Inc    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[10],[11],[12],[13],[14]   0.13%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[11],[12],[13],[14] $ 7,965,000  
Ending balance [3],[4],[10],[11],[12],[13],[14]   $ 7,965,000
Investment, Identifier [Axis]: Simplicity Financial Marketing Group Holdings Inc    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[5],[6],[7],[8],[9] 0.13%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[5],[6],[7],[8],[9] $ 8,309,000  
Investment, Identifier [Axis]: Simplicity Financial Marketing Group Holdings Inc, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 1,807,000 2,151,000
Fair Value 0 (11,000)
Investment, Identifier [Axis]: Simplicity Financial Marketing Group Holdings Inc, Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 1,076,000 1,076,000
Fair Value (11,000) (11,000)
Investment, Identifier [Axis]: Skopima Consilio Parent LLC, Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 4,200,000 4,200,000
Fair Value $ (59,000) $ (12,000)
Investment, Identifier [Axis]: Smile Doctors, LLC 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.17% [1],[2],[5],[8] 0.17% [3],[4],[10],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[14] $ 10,533,000  
Ending balance $ 10,452,000 [1],[2],[5],[8] $ 10,533,000 [3],[4],[10],[14]
Investment, Identifier [Axis]: Smile Doctors, LLC 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.03% [1],[2],[5],[7],[8],[9] 0.02% [3],[4],[10],[11],[13],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[11],[13],[14] $ 1,484,000  
Ending balance 1,771,000 [1],[2],[5],[7],[8],[9] $ 1,484,000 [3],[4],[10],[11],[13],[14]
Investment, Identifier [Axis]: Smile Doctors, LLC, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 738,000 1,036,000
Fair Value 0 0
Investment, Identifier [Axis]: Smile Doctors, LLC, Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 1,233,000 1,233,000
Fair Value (37,000) $ (31,000)
Investment, Identifier [Axis]: Snoopy Bidco, Inc.    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[10],[13],[14]   5.46%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[13],[14] $ 332,060,000  
Ending balance [3],[4],[10],[13],[14]   $ 332,060,000
Investment, Identifier [Axis]: Snoopy Bidco, Inc.    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[5],[8] 5.27%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[5],[8] $ 328,610,000  
Investment, Identifier [Axis]: Spaceship Purchaser Inc    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 1.46% [1],[2],[5],[7],[8],[9] 1.49% [3],[4],[10],[11],[13],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[11],[13],[14] $ 90,417,000  
Ending balance 90,874,000 [1],[2],[5],[7],[8],[9] $ 90,417,000 [3],[4],[10],[11],[13],[14]
Investment, Identifier [Axis]: Spaceship Purchaser Inc, Delayed Draw Term Loan 1    
Schedule of Investments [Line Items]    
Unfunded commitments 5,447,000 5,447,000
Fair Value 0 0
Investment, Identifier [Axis]: Spaceship Purchaser Inc, Delayed Draw Term Loan 2    
Schedule of Investments [Line Items]    
Unfunded commitments 13,072,000 13,072,000
Fair Value (65,000) (65,000)
Investment, Identifier [Axis]: Spaceship Purchaser Inc, Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 10,894,000 10,894,000
Fair Value (109,000) $ (109,000)
Investment, Identifier [Axis]: Sparta UK Bidco Ltd    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[11],[12],[13],[14]   0.30%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[11],[12],[13],[14] $ 18,008,000  
Ending balance [3],[4],[11],[12],[13],[14]   $ 18,008,000
Investment, Identifier [Axis]: Sparta UK Bidco Ltd    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[6],[7],[8],[9],[17] 0.36%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[6],[7],[8],[9],[17] $ 22,300,000  
Investment, Identifier [Axis]: Sparta UK Bidco Ltd, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 1,237,000 5,099,000
Fair Value $ 0 $ 0
Investment, Identifier [Axis]: SpecialtyCare, Inc 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[7],[8],[15] 0.19%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[7],[8],[15] $ 11,591,000  
Investment, Identifier [Axis]: SpecialtyCare, Inc 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[7],[8],[9],[17] 0.01%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[7],[8],[9],[17] $ 431,000  
Investment, Identifier [Axis]: SpecialtyCare, Inc 3    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[7],[8],[15] 0.00%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[7],[8],[15] $ 100,000  
Investment, Identifier [Axis]: SpecialtyCare, Inc. 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[13],[14],[16]   0.19%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[13],[14],[16] 11,621,000  
Ending balance [3],[4],[13],[14],[16]   $ 11,621,000
Investment, Identifier [Axis]: SpecialtyCare, Inc. 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[11],[13],[14],[18]   0.01%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[11],[13],[14],[18] 643,000  
Ending balance [3],[4],[11],[13],[14],[18]   $ 643,000
Investment, Identifier [Axis]: SpecialtyCare, Inc. 3    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[13],[14],[16]   0.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[13],[14],[16] 101,000  
Ending balance [3],[4],[13],[14],[16]   $ 101,000
Investment, Identifier [Axis]: SpecialtyCare, Inc., Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 607,000 404,000
Fair Value $ 0 $ 0
Investment, Identifier [Axis]: Spectrum Safety Solutions Purchaser, LLC - Common Equity    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.08% [1],[2],[6],[8] 0.01% [3],[4],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[14] $ 579,000  
Ending balance $ 5,287,000 [1],[2],[6],[8] $ 579,000 [3],[4],[14]
Investment, Identifier [Axis]: Spectrum Safety Solutions Purchaser, LLC 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.98% [1],[2],[6],[8],[9],[22] 0.99% [3],[4],[11],[13],[14],[28]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[11],[13],[14],[28] $ 60,058,000  
Ending balance $ 61,466,000 [1],[2],[6],[8],[9],[22] $ 60,058,000 [3],[4],[11],[13],[14],[28]
Investment, Identifier [Axis]: Spectrum Safety Solutions Purchaser, LLC 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.26% [1],[2],[6],[7],[8],[22] 0.25% [3],[4],[12],[13],[14],[28]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[12],[13],[14],[28] $ 15,487,000  
Ending balance $ 16,167,000 [1],[2],[6],[7],[8],[22] $ 15,487,000 [3],[4],[12],[13],[14],[28]
Investment, Identifier [Axis]: Spectrum Safety Solutions Purchaser, LLC 3    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.02% [1],[2],[6],[7],[8],[22] 0.03% [3],[4],[12],[13],[14],[28]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[12],[13],[14],[28] $ 1,755,000  
Ending balance 1,256,000 [1],[2],[6],[7],[8],[22] $ 1,755,000 [3],[4],[12],[13],[14],[28]
Investment, Identifier [Axis]: Spectrum Safety Solutions Purchaser, LLC, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 16,126,000 16,126,000
Fair Value (121,000) (121,000)
Investment, Identifier [Axis]: Spectrum Safety Solutions Purchaser, LLC, Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 13,310,000 14,298,000
Fair Value $ 0 $ (107,000)
Investment, Identifier [Axis]: Speedster Bidco GmbH    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.55% [1],[2],[6],[8],[17] 0.57% [3],[4],[12],[14],[18]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[12],[14],[18] $ 34,534,000  
Ending balance $ 34,584,000 [1],[2],[6],[8],[17] $ 34,534,000 [3],[4],[12],[14],[18]
Investment, Identifier [Axis]: Speedster Bidco GmbH 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.19% [1],[2],[6],[9],[17] 0.19% [3],[4],[11],[12],[14],[18]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[11],[12],[14],[18] $ 11,464,000  
Ending balance $ 11,926,000 [1],[2],[6],[9],[17] $ 11,464,000 [3],[4],[11],[12],[14],[18]
Investment, Identifier [Axis]: Speedster Bidco GmbH 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.05% [1],[2],[6],[22] 0.05% [3],[4],[12],[28]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[12],[28] $ 2,841,000  
Ending balance 2,830,000 [1],[2],[6],[22] $ 2,841,000 [3],[4],[12],[28]
Investment, Identifier [Axis]: Speedster Bidco GmbH, Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 1,801,000 1,801,000
Fair Value $ (10,000) $ (5,000)
Investment, Identifier [Axis]: Spitfire Parent, Inc. 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.91% [1],[2],[8],[15] 0.94% [3],[4],[14],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[14],[16] $ 56,832,000  
Ending balance $ 56,702,000 [1],[2],[8],[15] $ 56,832,000 [3],[4],[14],[16]
Investment, Identifier [Axis]: Spitfire Parent, Inc. 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.34% [1],[2],[8],[15] 0.35% [3],[4],[14],[28]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[14],[28] $ 20,984,000  
Ending balance $ 20,930,000 [1],[2],[8],[15] $ 20,984,000 [3],[4],[14],[28]
Investment, Identifier [Axis]: Spitfire Parent, Inc. 3    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.17% [1],[2],[7],[8],[15] 0.17% [3],[4],[13],[14],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[13],[14],[16] $ 10,496,000  
Ending balance 10,900,000 [1],[2],[7],[8],[15] $ 10,496,000 [3],[4],[13],[14],[16]
Investment, Identifier [Axis]: Stamps.com, Inc.    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[10],[13],[14]   0.05%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[13],[14] $ 3,224,000  
Ending balance [3],[4],[10],[13],[14]   $ 3,224,000
Investment, Identifier [Axis]: Stamps.com, Inc. 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.05% [1],[2],[5],[7],[8] 4.51% [3],[4],[10],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[14] $ 274,131,000  
Ending balance $ 3,216,000 [1],[2],[5],[7],[8] $ 274,131,000 [3],[4],[10],[14]
Investment, Identifier [Axis]: Stamps.com, Inc. 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[5],[8] 4.38%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[5],[8] $ 273,427,000  
Investment, Identifier [Axis]: State Street Institutional U.S. Government Money Market Fund - Investor Class    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 5.30% [1],[2] 0.53% [3],[4]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4] $ 31,987,000  
Ending balance $ 330,674,000 [1],[2] $ 31,987,000 [3],[4]
Investment, Identifier [Axis]: Stepping Stones Healthcare Services, LLC 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.04% [1],[2],[5],[8] 0.04% [3],[4],[10],[13],[14],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[13],[14],[16] $ 2,699,000  
Ending balance $ 2,692,000 [1],[2],[5],[8] $ 2,699,000 [3],[4],[10],[13],[14],[16]
Investment, Identifier [Axis]: Stepping Stones Healthcare Services, LLC 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.00% [1],[2],[5],[7],[8],[9] 0.00% [3],[4],[10],[11],[13],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[11],[13],[14] $ 74,000  
Ending balance 200,000 [1],[2],[5],[7],[8],[9] $ 74,000 [3],[4],[10],[11],[13],[14]
Investment, Identifier [Axis]: Stepping Stones Healthcare Services, LLC, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 540,000 671,000
Fair Value 0 0
Investment, Identifier [Axis]: Stepping Stones Healthcare Services, LLC, Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 371,000 371,000
Fair Value $ 0 $ 0
Investment, Identifier [Axis]: TCFI AEVEX, LLC    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 1.73% [1],[2],[8],[15] 1.80% [3],[4],[14],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[14],[16] $ 109,088,000  
Ending balance $ 108,259,000 [1],[2],[8],[15] $ 109,088,000 [3],[4],[14],[16]
Investment, Identifier [Axis]: TEI Intermediate LLC 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [5] 0.41% [1],[2],[8] 0.42% [3],[4],[10],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[10],[14] $ 25,541,000  
Ending balance [5] $ 25,670,000 [1],[2],[8] $ 25,541,000 [3],[4],[10],[14]
Investment, Identifier [Axis]: TEI Intermediate LLC 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [5] 0.01% [1],[2],[7],[8],[9] 0.01% [3],[4],[10],[11],[13],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[10],[11],[13],[14] $ 336,000  
Ending balance [5] 437,000 [1],[2],[7],[8],[9] $ 336,000 [3],[4],[10],[11],[13],[14]
Investment, Identifier [Axis]: TEI Intermediate LLC, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 8,256,000 8,256,000
Fair Value (41,000) (41,000)
Investment, Identifier [Axis]: TEI Intermediate LLC, Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 3,013,000 3,096,000
Fair Value 0 $ 0
Investment, Identifier [Axis]: THG Acquisition LLC    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[10],[11],[13],[14]   0.19%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[11],[13],[14] $ 11,606,000  
Ending balance [3],[4],[10],[11],[13],[14]   $ 11,606,000
Investment, Identifier [Axis]: THG Acquisition LLC 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[5],[7],[8] 0.19%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[5],[7],[8] $ 11,653,000  
Investment, Identifier [Axis]: THG Acquisition LLC 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[5],[8],[9] 0.00%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[5],[8],[9] $ 92,000  
Investment, Identifier [Axis]: THG Acquisition LLC, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 2,552,000 2,598,000
Fair Value 0 (13,000)
Investment, Identifier [Axis]: THG Acquisition LLC, Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 1,239,000 1,202,000
Fair Value $ 0 $ 0
Investment, Identifier [Axis]: THL Fund IX Investors (Plymouth II), LP - LP Interest    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.01% [1],[2],[8] 0.01% [3],[4],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[14] $ 346,000  
Ending balance $ 346,000 [1],[2],[8] $ 346,000 [3],[4],[14]
Investment, Identifier [Axis]: TPG IX Newark CI, L.P. - LP Interest    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.03% [1],[2],[8] 0.03% [3],[4],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[14] $ 1,966,000  
Ending balance $ 1,966,000 [1],[2],[8] $ 1,966,000 [3],[4],[14]
Investment, Identifier [Axis]: TRP Infrastructure Services, LLC 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.62% [1],[2],[8],[15] 0.63% [3],[4],[14],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[14],[16] $ 38,101,000  
Ending balance $ 38,388,000 [1],[2],[8],[15] $ 38,101,000 [3],[4],[14],[16]
Investment, Identifier [Axis]: TRP Infrastructure Services, LLC 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.21% [1],[2],[7],[8],[9],[15] 0.21% [3],[4],[11],[13],[14],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[11],[13],[14],[16] $ 13,003,000  
Ending balance 13,135,000 [1],[2],[7],[8],[9],[15] $ 13,003,000 [3],[4],[11],[13],[14],[16]
Investment, Identifier [Axis]: TRP Infrastructure Services, LLC, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 10,766,000 10,766,000
Fair Value (54,000) $ (54,000)
Investment, Identifier [Axis]: Tailwind Colony Holding Corporation    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[14],[16]   0.77%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[14],[16] $ 46,602,000  
Ending balance [3],[4],[14],[16]   $ 46,602,000
Investment, Identifier [Axis]: Tailwind Colony Holding Corporation    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[8],[15] 0.74%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[8],[15] $ 46,265,000  
Investment, Identifier [Axis]: Tango Bidco SAS 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.20% [1],[2],[6],[7],[8],[17] 0.20% [3],[4],[12],[13],[14],[18]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[12],[13],[14],[18] $ 12,124,000  
Ending balance $ 12,656,000 [1],[2],[6],[7],[8],[17] $ 12,124,000 [3],[4],[12],[13],[14],[18]
Investment, Identifier [Axis]: Tango Bidco SAS 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.06% [1],[2],[6],[7],[8],[9],[17] 0.04% [3],[4],[11],[12],[13],[14],[18]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[11],[12],[13],[14],[18] $ 2,596,000  
Ending balance 3,435,000 [1],[2],[6],[7],[8],[9],[17] $ 2,596,000 [3],[4],[11],[12],[13],[14],[18]
Investment, Identifier [Axis]: Tango Bidco SAS, Delayed Draw Term Loan 1    
Schedule of Investments [Line Items]    
Unfunded commitments 962,000 962,000
Fair Value (6,000) (6,000)
Investment, Identifier [Axis]: Tango Bidco SAS, Delayed Draw Term Loan 2    
Schedule of Investments [Line Items]    
Unfunded commitments 1,580,000 2,305,000
Fair Value $ 0 $ 0
Investment, Identifier [Axis]: Tennessee Bidco Limited 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 1.45% [1],[2],[8] 1.46% [3],[4],[12],[14],[18]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[12],[14],[18] $ 88,637,000  
Ending balance $ 90,453,000 [1],[2],[8] $ 88,637,000 [3],[4],[12],[14],[18]
Investment, Identifier [Axis]: Tennessee Bidco Limited 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.09% [1],[2],[6],[7],[8],[17] 0.09% [3],[4],[12],[13],[14],[18]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[12],[13],[14],[18] $ 5,633,000  
Ending balance $ 5,690,000 [1],[2],[6],[7],[8],[17] $ 5,633,000 [3],[4],[12],[13],[14],[18]
Investment, Identifier [Axis]: Tennessee Bidco Limited 3    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.94% [1],[2],[6],[7],[8],[17] 0.92% [3],[4],[12],[13],[14],[18]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[12],[13],[14],[18] $ 55,671,000  
Ending balance $ 58,612,000 [1],[2],[6],[7],[8],[17] $ 55,671,000 [3],[4],[12],[13],[14],[18]
Investment, Identifier [Axis]: Tennessee Bidco Limited 4    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.05% [1],[2],[6],[7],[8],[9],[17] 0.05% [3],[4],[11],[12],[13],[14],[18]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[11],[12],[13],[14],[18] $ 2,971,000  
Ending balance $ 3,250,000 [1],[2],[6],[7],[8],[9],[17] $ 2,971,000 [3],[4],[11],[12],[13],[14],[18]
Investment, Identifier [Axis]: Tennessee Bidco Limited 5    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.03% [1],[2],[6],[7],[8],[17] 0.03% [3],[4],[12],[13],[14],[18]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[12],[13],[14],[18] $ 1,926,000  
Ending balance $ 2,051,000 [1],[2],[6],[7],[8],[17] $ 1,926,000 [3],[4],[12],[13],[14],[18]
Investment, Identifier [Axis]: Tennessee Bidco Limited 6    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.03% [1],[2],[6],[7],[8],[17] 0.03% [3],[4],[12],[13],[14],[18]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[12],[13],[14],[18] $ 1,717,000  
Ending balance 1,810,000 [1],[2],[6],[7],[8],[17] $ 1,717,000 [3],[4],[12],[13],[14],[18]
Investment, Identifier [Axis]: Tennessee Bidco Limited, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 22,998,000 22,998,000
Fair Value $ 0 $ 0
Investment, Identifier [Axis]: The Fertility Partners, Inc 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[5],[6],[7],[8] 0.08%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[5],[6],[7],[8] $ 4,836,000  
Investment, Identifier [Axis]: The Fertility Partners, Inc 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[5],[6],[7],[8] 0.05%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[5],[6],[7],[8] $ 3,184,000  
Investment, Identifier [Axis]: The Fertility Partners, Inc 3    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[5],[6],[7],[8],[9] 0.00%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[5],[6],[7],[8],[9] $ 58,000  
Investment, Identifier [Axis]: The Fertility Partners, Inc. 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[10],[12],[13],[14]   0.08%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[12],[13],[14] 4,837,000  
Ending balance [3],[4],[10],[12],[13],[14]   $ 4,837,000
Investment, Identifier [Axis]: The Fertility Partners, Inc. 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[10],[12],[13],[14]   0.05%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[12],[13],[14] 3,188,000  
Ending balance [3],[4],[10],[12],[13],[14]   $ 3,188,000
Investment, Identifier [Axis]: The Fertility Partners, Inc. 3    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[10],[11],[12],[13],[14]   0.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[11],[12],[13],[14] 58,000  
Ending balance [3],[4],[10],[11],[12],[13],[14]   $ 58,000
Investment, Identifier [Axis]: The Fertility Partners, Inc., Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 211,000 211,000
Fair Value 0 $ 0
Investment, Identifier [Axis]: The GI Alliance Management, LLC 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[13],[14],[16]   0.07%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[13],[14],[16] 4,065,000  
Ending balance [3],[4],[13],[14],[16]   $ 4,065,000
Investment, Identifier [Axis]: The GI Alliance Management, LLC 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[13],[14],[16]   0.01%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[13],[14],[16] 451,000  
Ending balance [3],[4],[13],[14],[16]   $ 451,000
Investment, Identifier [Axis]: The GI Alliance Management, LLC 3    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[13],[14],[16]   0.01%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[13],[14],[16] 876,000  
Ending balance [3],[4],[13],[14],[16]   $ 876,000
Investment, Identifier [Axis]: The GI Alliance Management, LLC 4    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[11],[13],[14],[16]   0.18%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[11],[13],[14],[16] $ 10,913,000  
Ending balance [3],[4],[11],[13],[14],[16]   $ 10,913,000
Investment, Identifier [Axis]: The GI Alliance Management, LLC, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments   35,604,000
Fair Value   $ 0
Investment, Identifier [Axis]: The Hiller Companies, LLC 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [5] 0.13% [1],[2],[8] 0.13% [3],[4],[10],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[10],[14] $ 8,152,000  
Ending balance [5] $ 8,131,000 [1],[2],[8] $ 8,152,000 [3],[4],[10],[14]
Investment, Identifier [Axis]: The Hiller Companies, LLC 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [5] 0.01% [1],[2],[7],[8],[9] 0.01% [3],[4],[10],[11],[13],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[5],[10],[11],[13],[14] $ 542,000  
Ending balance [5] 545,000 [1],[2],[7],[8],[9] $ 542,000 [3],[4],[10],[11],[13],[14]
Investment, Identifier [Axis]: The Hiller Companies, LLC, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 1,696,000 1,696,000
Fair Value 0 0
Investment, Identifier [Axis]: The Hiller Companies, LLC, Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 1,432,000 1,432,000
Fair Value $ (11,000) $ (11,000)
Investment, Identifier [Axis]: The North Highland Co LLC 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.25% [1],[2],[5],[7],[8] 0.26% [3],[4],[10],[13],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[13],[14] $ 15,862,000  
Ending balance $ 15,823,000 [1],[2],[5],[7],[8] $ 15,862,000 [3],[4],[10],[13],[14]
Investment, Identifier [Axis]: The North Highland Co LLC 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.03% [1],[2],[5],[7],[8],[9] 0.01% [3],[4],[10],[11],[13],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[11],[13],[14] $ 772,000  
Ending balance 1,952,000 [1],[2],[5],[7],[8],[9] $ 772,000 [3],[4],[10],[11],[13],[14]
Investment, Identifier [Axis]: The North Highland Co LLC, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 5,903,000 5,903,000
Fair Value (30,000) (30,000)
Investment, Identifier [Axis]: The North Highland Co LLC, Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 2,193,000 3,373,000
Fair Value $ 0 $ 0
Investment, Identifier [Axis]: Thevelia US, LLC    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.02% [1],[2],[6],[7],[22] 0.02% [3],[4],[12],[14],[28]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[12],[14],[28] $ 1,292,000  
Ending balance $ 1,279,000 [1],[2],[6],[7],[22] $ 1,292,000 [3],[4],[12],[14],[28]
Investment, Identifier [Axis]: Thevelia US, LLC 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.08% [1],[2],[6],[7],[8],[22] 0.08% [3],[4],[12],[13],[14],[28]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[12],[13],[14],[28] $ 4,920,000  
Ending balance $ 4,920,000 [1],[2],[6],[7],[8],[22] $ 4,920,000 [3],[4],[12],[13],[14],[28]
Investment, Identifier [Axis]: Titan Investment Company, Inc.    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.62% [1],[2],[8],[17] 0.63% [3],[4],[14],[18]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[14],[18] $ 38,488,000  
Ending balance $ 38,387,000 [1],[2],[8],[17] $ 38,488,000 [3],[4],[14],[18]
Investment, Identifier [Axis]: Tricentis Operations Holdings, Inc.    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[8],[9],[15] 0.36%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[8],[9],[15] $ 22,694,000  
Investment, Identifier [Axis]: Tricentis Operations Holdings, Inc., Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 4,595,000  
Fair Value (23,000)  
Investment, Identifier [Axis]: Tricentis Operations Holdings, Inc., Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 2,872,000  
Fair Value $ (29,000)  
Investment, Identifier [Axis]: Tricentis, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments   4,549,000
Fair Value   0
Investment, Identifier [Axis]: Tricentis, Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments   2,843,000
Fair Value   0
Investment, Identifier [Axis]: Tricentis, Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments   22,745,000
Fair Value   $ 0
Investment, Identifier [Axis]: Tricor Horizon - LP Interest    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.01% [1],[2],[6],[8] 0.01% [3],[4],[12],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[12],[14] $ 416,000  
Ending balance $ 421,000 [1],[2],[6],[8] $ 416,000 [3],[4],[12],[14]
Investment, Identifier [Axis]: Trinity Air Consultants Holdings Corp - Common Units    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.00% [1],[2],[8] 0.00% [3],[4],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[14] $ 6,000  
Ending balance $ 6,000 [1],[2],[8] $ 6,000 [3],[4],[14]
Investment, Identifier [Axis]: Trinity Air Consultants Holdings Corp. 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.96% [1],[2],[5],[8] 0.99% [3],[4],[10],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[14] $ 59,901,000  
Ending balance $ 59,901,000 [1],[2],[5],[8] $ 59,901,000 [3],[4],[10],[14]
Investment, Identifier [Axis]: Trinity Air Consultants Holdings Corp. 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.56% [1],[2],[5],[8],[9] 0.46% [3],[4],[10],[11],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[11],[14] $ 27,747,000  
Ending balance 34,684,000 [1],[2],[5],[8],[9] $ 27,747,000 [3],[4],[10],[11],[14]
Investment, Identifier [Axis]: Trinity Air Consultants Holdings Corp., Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 956,000 7,907,000
Fair Value 0 0
Investment, Identifier [Axis]: Trinity Air Consultants Holdings Corp., Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 7,269,000 7,269,000
Fair Value $ 0 $ 0
Investment, Identifier [Axis]: Trinity Partners Holdings, LLC    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.08% [1],[2],[8],[9],[15],[24] 0.08% [3],[4],[11],[14],[16],[26]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[11],[14],[16],[26] $ 4,687,000  
Ending balance 4,689,000 [1],[2],[8],[9],[15],[24] $ 4,687,000 [3],[4],[11],[14],[16],[26]
Investment, Identifier [Axis]: Trinity Partners Holdings, LLC, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 1,433,000 1,433,000
Fair Value $ (14,000) $ (14,000)
Investment, Identifier [Axis]: Triple Lift, Inc. 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.21% [1],[2],[5],[8] 0.21% [3],[4],[10],[11],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[11],[14] $ 12,884,000  
Ending balance $ 13,188,000 [1],[2],[5],[8] $ 12,884,000 [3],[4],[10],[11],[14]
Investment, Identifier [Axis]: Triple Lift, Inc. 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.72% [1],[2],[5],[8],[9] 0.75% [3],[4],[10],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[14] $ 45,394,000  
Ending balance 45,012,000 [1],[2],[5],[8],[9] $ 45,394,000 [3],[4],[10],[14]
Investment, Identifier [Axis]: Triple Lift, Inc., Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 7,697,000 7,697,000
Fair Value $ (308,000) $ (308,000)
Investment, Identifier [Axis]: Turing Holdco, Inc. 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.14% [1],[2],[6],[7],[8],[17] 0.14% [3],[4],[12],[13],[14],[18]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[12],[13],[14],[18] $ 8,766,000  
Ending balance $ 8,674,000 [1],[2],[6],[7],[8],[17] $ 8,766,000 [3],[4],[12],[13],[14],[18]
Investment, Identifier [Axis]: Turing Holdco, Inc. 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.07% [1],[2],[6],[7],[8],[17] 0.07% [3],[4],[11],[12],[13],[14],[18]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[11],[12],[13],[14],[18] $ 4,363,000  
Ending balance $ 4,339,000 [1],[2],[6],[7],[8],[17] $ 4,363,000 [3],[4],[11],[12],[13],[14],[18]
Investment, Identifier [Axis]: Turing Holdco, Inc. 3    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.19% [1],[2],[6],[7],[8],[17] 0.19% [3],[4],[12],[13],[14],[18]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[12],[13],[14],[18] $ 11,707,000  
Ending balance $ 12,004,000 [1],[2],[6],[7],[8],[17] $ 11,707,000 [3],[4],[12],[13],[14],[18]
Investment, Identifier [Axis]: Turing Holdco, Inc. 4    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.07% [1],[2],[6],[7],[8],[17] 0.07% [3],[4],[12],[13],[14],[18]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[12],[13],[14],[18] $ 4,482,000  
Ending balance $ 4,620,000 [1],[2],[6],[7],[8],[17] $ 4,482,000 [3],[4],[12],[13],[14],[18]
Investment, Identifier [Axis]: Turing Holdco, Inc. 5    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.33% [1],[2],[5],[6],[8],[9] 0.34% [3],[4],[10],[12],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[12],[14] $ 20,630,000  
Ending balance $ 20,368,000 [1],[2],[5],[6],[8],[9] $ 20,630,000 [3],[4],[10],[12],[14]
Investment, Identifier [Axis]: Turing Holdco, Inc. 6    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.32% [1],[2],[5],[6],[7],[8],[9] 0.32% [3],[4],[10],[11],[12],[13],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[11],[12],[13],[14] $ 19,408,000  
Ending balance 19,794,000 [1],[2],[5],[6],[7],[8],[9] $ 19,408,000 [3],[4],[10],[11],[12],[13],[14]
Investment, Identifier [Axis]: Turing Holdco, Inc., Delayed Draw Term Loan 1    
Schedule of Investments [Line Items]    
Unfunded commitments 28,117,000 28,117,000
Fair Value 0 0
Investment, Identifier [Axis]: Turing Holdco, Inc., Delayed Draw Term Loan 2    
Schedule of Investments [Line Items]    
Unfunded commitments 20,901,000 20,901,000
Fair Value $ 0 $ 0
Investment, Identifier [Axis]: UMP Holdings, LLC 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.02% [1],[2],[5],[7],[8] 0.02% [3],[4],[10],[13],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[13],[14] $ 1,079,000  
Ending balance $ 1,073,000 [1],[2],[5],[7],[8] $ 1,079,000 [3],[4],[10],[13],[14]
Investment, Identifier [Axis]: UMP Holdings, LLC 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.02% [1],[2],[5],[7],[8] 0.02% [3],[4],[10],[13],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[13],[14] $ 1,480,000  
Ending balance $ 1,473,000 [1],[2],[5],[7],[8] $ 1,480,000 [3],[4],[10],[13],[14]
Investment, Identifier [Axis]: US Oral Surgery Management Holdco, LLC 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.59% [1],[2],[5],[8] 0.61% [3],[4],[10],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[14] $ 37,021,000  
Ending balance $ 37,021,000 [1],[2],[5],[8] $ 37,021,000 [3],[4],[10],[14]
Investment, Identifier [Axis]: US Oral Surgery Management Holdco, LLC 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.25% [1],[2],[5],[8] 0.26% [3],[4],[10],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[14] $ 15,616,000  
Ending balance $ 15,616,000 [1],[2],[5],[8] $ 15,616,000 [3],[4],[10],[14]
Investment, Identifier [Axis]: US Oral Surgery Management Holdco, LLC 3    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.48% [1],[2],[5],[8],[9] 0.45% [3],[4],[10],[11],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[11],[14] $ 27,426,000  
Ending balance $ 30,197,000 [1],[2],[5],[8],[9] $ 27,426,000 [3],[4],[10],[11],[14]
Investment, Identifier [Axis]: US Oral Surgery Management Holdco, LLC 4    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.00% [1],[2],[5],[7],[8] 0.00% [3],[4],[10],[13],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[13],[14] $ 83,000  
Ending balance 83,000 [1],[2],[5],[7],[8] $ 83,000 [3],[4],[10],[13],[14]
Investment, Identifier [Axis]: US Oral Surgery Management Holdco, LLC, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 38,655,000 41,551,000
Fair Value 0 (208,000)
Investment, Identifier [Axis]: US Oral Surgery Management Holdco, LLC, Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 3,735,000 3,735,000
Fair Value $ 0 $ 0
Investment, Identifier [Axis]: Unified Women's Healthcare LP 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[7],[8],[9],[22] 0.63%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[7],[8],[9],[22] $ 39,398,000  
Investment, Identifier [Axis]: Unified Women's Healthcare LP 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.03% [1],[2],[7],[8],[22] 0.03% [3],[4],[13],[14],[28]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[13],[14],[28] $ 2,081,000  
Ending balance 2,076,000 [1],[2],[7],[8],[22] $ 2,081,000 [3],[4],[13],[14],[28]
Investment, Identifier [Axis]: Unified Women's Healthcare LP 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[11],[13],[14],[28]   0.32%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[11],[13],[14],[28] 19,419,000  
Ending balance [3],[4],[11],[13],[14],[28]   $ 19,419,000
Investment, Identifier [Axis]: Unified Women's Healthcare LP, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 27,807,000  
Fair Value 0  
Investment, Identifier [Axis]: Unified Women's Healthcare LP, Delayed Draw Term Loan 1    
Schedule of Investments [Line Items]    
Unfunded commitments   2,895,000
Fair Value   0
Investment, Identifier [Axis]: Unified Women's Healthcare LP, Delayed Draw Term Loan 2    
Schedule of Investments [Line Items]    
Unfunded commitments   44,793,000
Fair Value   0
Investment, Identifier [Axis]: Unified Women's Healthcare LP, Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 241,000 241,000
Fair Value $ 0 $ 0
Investment, Identifier [Axis]: Varicent Parent Holdings Corp    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.20% [1],[2],[5],[7],[8],[9] 0.20% [3],[4],[10],[11],[13],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[11],[13],[14] $ 11,998,000  
Ending balance 12,314,000 [1],[2],[5],[7],[8],[9] $ 11,998,000 [3],[4],[10],[11],[13],[14]
Investment, Identifier [Axis]: Varicent Parent Holdings Corp, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 2,576,000 2,794,000
Fair Value (19,000) (21,000)
Investment, Identifier [Axis]: Varicent Parent Holdings Corp, Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 1,557,000 1,557,000
Fair Value $ (23,000) $ (23,000)
Investment, Identifier [Axis]: Veregy Consolidated, Inc.    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.33% [1],[2],[15] 0.34% [3],[4],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[16] $ 20,479,000  
Ending balance $ 20,457,000 [1],[2],[15] $ 20,479,000 [3],[4],[16]
Investment, Identifier [Axis]: Victory Buyer, LLC    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.15% [1],[2],[8],[22] 0.15% [3],[4],[14],[28]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[14],[28] $ 9,188,000  
Ending balance $ 9,186,000 [1],[2],[8],[22] $ 9,188,000 [3],[4],[14],[28]
Investment, Identifier [Axis]: WHCG Purchaser III Inc 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.32% [1],[2],[5],[7],[8],[9] 0.33% [3],[4],[10],[11],[13],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[11],[13],[14] $ 19,921,000  
Ending balance $ 20,191,000 [1],[2],[5],[7],[8],[9] $ 19,921,000 [3],[4],[10],[11],[13],[14]
Investment, Identifier [Axis]: WHCG Purchaser III Inc 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.10% [1],[2],[5],[7],[8],[23] 0.10% [3],[4],[10],[13],[14],[25]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[13],[14],[25] $ 6,167,000  
Ending balance 6,458,000 [1],[2],[5],[7],[8],[23] $ 6,167,000 [3],[4],[10],[13],[14],[25]
Investment, Identifier [Axis]: WHCG Purchaser III Inc, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 7,044,000 7,044,000
Fair Value $ 0 $ 0
Investment, Identifier [Axis]: WHCG Purchaser, Inc. - Class A Common Units    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.00% [1],[2],[8] 0.00% [3],[4],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[14] $ 0  
Ending balance $ 0 [1],[2],[8] $ 0 [3],[4],[14]
Investment, Identifier [Axis]: WPEngine, Inc.    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 1.07% [1],[2],[5],[8],[9] 1.09% [3],[4],[10],[11],[13],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[11],[13],[14] $ 66,467,000  
Ending balance 66,467,000 [1],[2],[5],[8],[9] $ 66,467,000 [3],[4],[10],[11],[13],[14]
Investment, Identifier [Axis]: WPEngine, Inc., Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 6,667,000 6,667,000
Fair Value $ (200,000) $ (200,000)
Investment, Identifier [Axis]: Water Holdings Acquisition LLC    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.50% [1],[2],[5],[8],[9] 0.51% [3],[4],[10],[11],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[11],[14] $ 31,057,000  
Ending balance 31,488,000 [1],[2],[5],[8],[9] $ 31,057,000 [3],[4],[10],[11],[14]
Investment, Identifier [Axis]: Water Holdings Acquisition LLC, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 5,554,000 5,754,000
Fair Value $ 0 $ 0
Investment, Identifier [Axis]: West Monroe Partners, LLC 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.23% [1],[2],[5],[8],[9] 0.24% [3],[4],[10],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[14] $ 14,450,000  
Ending balance $ 14,413,000 [1],[2],[5],[8],[9] $ 14,450,000 [3],[4],[10],[14]
Investment, Identifier [Axis]: West Monroe Partners, LLC 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.01% [1],[2],[5],[7],[8],[9] 0.01% [3],[4],[10],[11],[13],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[11],[13],[14] $ 494,000  
Ending balance 493,000 [1],[2],[5],[7],[8],[9] $ 494,000 [3],[4],[10],[11],[13],[14]
Investment, Identifier [Axis]: West Monroe Partners, LLC, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 2,500,000 2,500,000
Fair Value 0 0
Investment, Identifier [Axis]: West Monroe Partners, LLC, Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 1,443,000 1,443,000
Fair Value $ 0 $ 0
Investment, Identifier [Axis]: Windows Acquisition Holdings, Inc.    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.68% [1],[2],[7],[8],[15] 0.70% [3],[4],[10],[13],[14],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[13],[14],[16] $ 42,274,000  
Ending balance $ 42,137,000 [1],[2],[7],[8],[15] $ 42,274,000 [3],[4],[10],[13],[14],[16]
Investment, Identifier [Axis]: World Insurance Associates, LLC 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.56% [1],[2],[8],[15] 0.62% [3],[4],[14],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[14],[16] $ 37,826,000  
Ending balance $ 34,650,000 [1],[2],[8],[15] $ 37,826,000 [3],[4],[14],[16]
Investment, Identifier [Axis]: World Insurance Associates, LLC 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.53% [1],[2],[7],[8],[15] 0.53% [3],[4],[11],[14],[16]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[11],[14],[16] $ 32,343,000  
Ending balance $ 33,283,000 [1],[2],[7],[8],[15] $ 32,343,000 [3],[4],[11],[14],[16]
Investment, Identifier [Axis]: World Insurance Associates, LLC 3    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[8],[9],[15] 0.06%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[8],[9],[15] $ 3,564,000  
Investment, Identifier [Axis]: World Insurance Associates, LLC, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 40,362,000 14,682,000
Fair Value (199,000) 0
Investment, Identifier [Axis]: World Insurance Associates, LLC, Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 4,473,000 2,939,000
Fair Value $ (66,000) $ 0
Investment, Identifier [Axis]: YA Intermediate Holdings II, LLC 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.13% [1],[2],[5],[7],[8] 0.13% [3],[4],[10],[13],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[13],[14] $ 7,816,000  
Ending balance $ 7,829,000 [1],[2],[5],[7],[8] $ 7,816,000 [3],[4],[10],[13],[14]
Investment, Identifier [Axis]: YA Intermediate Holdings II, LLC 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.01% [1],[2],[5],[7],[8],[9] 0.00% [3],[4],[10],[11],[13],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[11],[13],[14] $ 47,000  
Ending balance 403,000 [1],[2],[5],[7],[8],[9] $ 47,000 [3],[4],[10],[11],[13],[14]
Investment, Identifier [Axis]: YA Intermediate Holdings II, LLC, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 2,937,000 3,286,000
Fair Value 0 (16,000)
Investment, Identifier [Axis]: YA Intermediate Holdings II, LLC, Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 1,499,000 1,499,000
Fair Value $ 0 0
Investment, Identifier [Axis]: Zellis TopCo Limited, Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments   7,765,000
Fair Value   $ 0
Investment, Identifier [Axis]: Zendesk Inc    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.03% [1],[2],[5],[7],[8],[9] 0.03% [3],[4],[10],[11],[13],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[11],[13],[14] $ 1,614,000  
Ending balance 1,610,000 [1],[2],[5],[7],[8],[9] $ 1,614,000 [3],[4],[10],[11],[13],[14]
Investment, Identifier [Axis]: Zendesk Inc, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 361,000 361,000
Fair Value (5,000) (5,000)
Investment, Identifier [Axis]: Zendesk Inc, Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 169,000 169,000
Fair Value 0 $ 0
Investment, Identifier [Axis]: Zeus, LLC    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[10],[11],[14]   0.43%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[10],[11],[14] $ 26,009,000  
Ending balance [3],[4],[10],[11],[14]   $ 26,009,000
Investment, Identifier [Axis]: Zeus, LLC    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[5],[8],[9] 0.42%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[5],[8],[9] $ 25,926,000  
Investment, Identifier [Axis]: Zeus, LLC, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 2,969,000 2,969,000
Fair Value 0 0
Investment, Identifier [Axis]: Zeus, LLC, Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 3,426,000 3,426,000
Fair Value $ (17,000) $ (17,000)
Investment, Identifier [Axis]: Zoro - Common Equity    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.00% [1],[2],[8] 0.00% [3],[4],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[14] $ 22,000  
Ending balance $ 22,000 [1],[2],[8] $ 22,000 [3],[4],[14]
Investment, Identifier [Axis]: Zoro - Series A Preferred Shares    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.01% [1],[2],[8] 0.01% [3],[4],[14]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[14] $ 492,000  
Ending balance 509,000 [1],[2],[8] $ 492,000 [3],[4],[14]
Investment, Identifier [Axis]: Zorro Bidco Ltd    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[4],[11],[12],[13],[14],[18]   0.53%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[4],[11],[12],[13],[14],[18] $ 32,502,000  
Ending balance [3],[4],[11],[12],[13],[14],[18]   $ 32,502,000
Investment, Identifier [Axis]: Zorro Bidco Ltd 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[7],[8],[9] 0.58%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[7],[8],[9] $ 36,373,000  
Investment, Identifier [Axis]: Zorro Bidco Ltd 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[7],[8] 0.06%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[7],[8] $ 4,047,000  
Investment, Identifier [Axis]: Zorro Bidco Ltd 3    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[7],[8] 0.07%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[7],[8] $ 4,273,000  
Investment, Identifier [Axis]: Zorro Bidco Ltd, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 4,772,000 7,647,000
Fair Value $ 0 $ (73,000)
Investment, Identifier [Axis]: eResearchTechnology, Inc 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[5],[8] 2.46%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[5],[8] $ 153,266,000  
Investment, Identifier [Axis]: eResearchTechnology, Inc. 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[2],[5],[7],[8],[9] 0.02%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[2],[5],[7],[8],[9] $ 1,033,000  
Investment, Identifier [Axis]: eResearchTechnology, Inc., Delayed Draw Term Loan 1    
Schedule of Investments [Line Items]    
Unfunded commitments 27,750,000  
Fair Value 0  
Investment, Identifier [Axis]: eResearchTechnology, Inc., Delayed Draw Term Loan 2    
Schedule of Investments [Line Items]    
Unfunded commitments 25,705,000  
Fair Value 0  
Investment, Identifier [Axis]: eResearchTechnology, Inc., Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 14,605,000  
Fair Value $ (146,000)  
[1] All securities are exempt from registration under the Securities Act of 1933, as amended (the “Securities Act”), and may be deemed to be “restricted securities.” As of March 31, 2025, the aggregate fair value of these securities is $12,834.2 million or 205.61% of the Company’s net assets. The initial acquisition dates have been included for such securities.
[2] Unless otherwise indicated, all debt and equity investments held by the Company (which such term “Company” shall include the Company’s consolidated subsidiaries for purposes of this Condensed Consolidated Schedule of Investments) are denominated in U.S. dollars. As of March 31, 2025, the Company had investments denominated in Canadian Dollars (CAD), Euros (EUR), British Pounds (GBP), Danish Krone (DKK), Swedish Krona (SEK), Norwegian Krone (NOK), and Australian Dollars (AUD). All debt investments are income producing unless otherwise indicated. All equity investments are non-income producing unless otherwise noted. Certain portfolio company investments are subject to contractual restrictions on sales. The total par amount (in thousands) is presented for debt investments, while the number of shares or units (in whole amounts) owned is presented for equity investments. Each of the Company’s investments is pledged as collateral, under one or more of its credit facilities unless otherwise indicated.
[3] All securities are exempt from registration under the Securities Act of 1933, as amended (the “Securities Act”), and may be deemed to be “restricted securities.” As of December 31, 2024, the aggregate fair value of these securities is $13,092.5 million or 215.43% of the Company’s net assets. The initial acquisition dates have been included for such securities.
[4] Unless otherwise indicated, all debt and equity investments held by the Company (which such term “Company” shall include the Company’s consolidated subsidiaries for purposes of this Condensed Consolidated Schedule of Investments) are denominated in dollars. As of December 31, 2024, the Company had investments denominated in Canadian Dollars (CAD), Euros (EUR), British Pounds (GBP), Danish Krone (DKK), Swedish Krona (SEK), Norwegian Krone (NOK), and Australian Dollars (AUD). All debt investments are income producing unless otherwise indicated. All equity investments are non-income producing unless otherwise noted. Certain portfolio company investments are subject to contractual restrictions on sales. The total par amount (in thousands) is presented for debt investments, while the number of shares or units (in whole amounts) owned is presented for equity investments. Each of the Company’s investments is pledged as collateral, under one or more of its credit facilities unless otherwise indicated.
[5] The interest rate floor on these investments as of March 31, 2025 was 0.75%.
[6] The investment is not a Qualifying Asset under Section 55(a) of the Investment Company Act of 1940, as amended (together with the rules and regulations promulgated thereunder, the “1940 Act”). The Company may not acquire any non-qualifying asset unless, at the time of acquisition, Qualifying Assets represent at least 70% of the Company’s total assets. As of March 31, 2025, non-qualifying assets represented 13.9% of total assets as calculated in accordance with regulatory requirements.
[7] These investments are not pledged as collateral under any of the Company’s credit facilities. For other debt investments that are pledged to the Company’s credit facilities, a single investment may be divided into parts that are individually pledged as collateral to separate credit facilities. Any other debt investments listed above are pledged to financing facilities and are not available to satisfy the creditors of the Company.
[8] These investments were valued using unobservable inputs and are considered Level 3 investments. Fair value was determined in good faith by or under the direction of the Board of Trustees (see Note 2), pursuant to the Company’s valuation policy.
[9] Position or portion thereof is an unfunded commitment, and no interest is being earned on the unfunded portion, although the investment may be subject to unused commitment fees. Negative cost and fair value results from unamortized fees, which are capitalized to the investment cost. The unfunded commitment may be subject to a commitment termination date that may expire prior to the maturity date stated. See below for more information on the Company’s unfunded commitments:
[10] The interest rate floor on these investments as of December 31, 2024 was 0.75%.
[11] Position or portion thereof is an unfunded commitment, and no interest is being earned on the unfunded portion, although the investment may be subject to unused commitment fees. Negative cost and fair value results from unamortized fees, which are capitalized to the investment cost. The unfunded commitment may be subject to a commitment termination date that may expire prior to the maturity date stated. See below for more information on the Company’s unfunded commitments:
[12] The investment is not a Qualifying Asset under Section 55(a) of the Investment Company Act of 1940, as amended (together with the rules and regulations promulgated thereunder, the “1940 Act”). The Company may not acquire any non-qualifying asset unless, at the time of acquisition, Qualifying Assets represent at least 70% of the Company’s total assets. As of December 31, 2024, non-qualifying assets represented 14.8% of total assets as calculated in accordance with regulatory requirements.
[13] These investments are not pledged as collateral under any of the Company’s credit facilities. For other debt investments that are pledged to the Company’s credit facilities, a single investment may be divided into parts that are individually pledged as collateral to separate credit facilities. Any other debt investments listed above are pledged to financing facilities and are not available to satisfy the creditors of the Company.
[14] These investments were valued using unobservable inputs and are considered Level 3 investments. Fair value was determined in good faith by or under the direction of the Board of Trustees (see Note 2), pursuant to the Company’s valuation policy.
[15] The interest rate floor on these investments as of March 31, 2025 was 1.00%.
[16] The interest rate floor on these investments as of December 31, 2024 was 1.00%.
[17] There are no interest rate floors on these investments.
[18] There are no interest rate floors on these investments.
[19] The interest rate floor on these investments as of December 31, 2024 was 1.50%.
[20] Under the 1940 Act, the Company would be deemed to “control” a portfolio company if the Company owned more than 25% of its outstanding voting securities and/or held the power to exercise control over the management or policies of the portfolio company. Under the 1940 Act, the Company would be deemed an “affiliated person” of a portfolio company if the Company owns 5% or more of the portfolio company’s outstanding voting securities. As of March 31, 2025, the Company’s non-controlled/affiliated investments were as follows:
[21] Under the 1940 Act, the Company would be deemed to “control” a portfolio company if the Company owned more than 25% of its outstanding voting securities and/or held the power to exercise control over the management or policies of the portfolio company. Under the 1940 Act, the Company would be deemed an “affiliated person” of a portfolio company if the Company owns 5% or more of the portfolio company’s outstanding voting securities. As of December 31, 2024, the Company’s non-controlled/affiliated investments were as follows:
Fair Value as of December 31, 2023
Gross AdditionsGross ReductionsNet Change in Unrealized Gains (Losses)Net Realized Gain (Loss)
Fair Value as of December 31, 2024
Dividend and Interest Income
Non-controlled/Affiliated Investments
Blackstone Donegal Holdings LP$5,790 $— $— $613 $— $6,403 $— 
Material Holdings, LLC— 21,384 — 163 — 21,547 1,378 
Material Holdings, LLC— 5,114 — (3,717)— 1,397 314 
Material+ Holding Company, LLC— — — — — — — 
Total$5,790 $26,498 $— $(2,941)$— $29,347 $1,692 
[22] The interest rate floor on these investments as of March 31, 2025 was 0.50%.
[23] Loan was on non-accrual status as of March 31, 2025.
[24] These loans are “last-out” portions of loans. The “last-out” portion of the Company’s loan investment generally earns a higher interest rate than the “first-out” portion, and in exchange the “first-out” portion would generally receive priority with respect to payment principal, interest and any other amounts due thereunder over the “last-out” portion.
[25] Loan was on non-accrual status as of December 31, 2024.
[26] These loans are “last-out” portions of loans. The “last-out” portion of the Company’s loan investment generally earns a higher interest rate than the “first-out” portion, and in exchange the “first-out” portion would generally receive priority with respect to payment principal, interest and any other amounts due thereunder over the “last-out” portion.
[27] The interest rate floor on these investments as of December 31, 2024 was 1.25%.
[28] The interest rate floor on these investments as of December 31, 2024 was 0.50%.
[29] The interest rate floor on these investments as of December 31, 2024 was 2.00%.
[30] The interest rate floor on these investments as of March 31, 2025 was 3.00%.
[31] The interest rate floor on these investments as of December 31, 2024 was 3.00%.