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Consolidated Schedule of Investments (Parenthetical) - USD ($)
$ in Thousands
 3 Months Ended 12 Months Ended
Mar. 31, 2023
Dec. 31, 2022
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 229.72% 231.24%
Unfunded commitments   $ 690,256
Fair Value   $ (3,057)
Percentage of portfolio above floor rate 94.10% 93.10%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance $ 9,617,248  
Ending balance $ 9,626,202 $ 9,617,248
Non-controlled/non-affiliated investments    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 228.61% [1] 229.90% [2],[3]
Unfunded commitments $ 598,825  
Fair Value (3,549)  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [2],[3] 9,560,664  
Ending balance $ 9,574,259 [1] $ 9,560,664 [2],[3]
Non-controlled/affiliated investments    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 1.24% [1] 1.36% [2],[3]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance $ 56,584 [2],[3] $ 35,683
Investments in and Advances to Affiliates, at Fair Value, Gross Additions 0 3,879
Investments in and Advances to Affiliates, at Fair Value, Gross Reductions 0 0
Investments in and Advances to Affiliates, at Fair Value, Period Increase (Decrease) (4,641) 17,022
Ending balance 51,943 [1] 56,584 [2],[3]
Dividend and Interest Income 0 0
Non-controlled/affiliated investments | Blackstone Donegal Holdings LP    
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance 56,584 35,683
Investments in and Advances to Affiliates, at Fair Value, Gross Additions 0 3,879
Investments in and Advances to Affiliates, at Fair Value, Gross Reductions 0 0
Investments in and Advances to Affiliates, at Fair Value, Period Increase (Decrease) (4,641) 17,022
Ending balance 51,943 56,584
Dividend and Interest Income $ 0 $ 0
Qualifying Assets    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 70.00%  
Non-qualifying Assets    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 10.40% 11.00%
Low | Qualifying Assets    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets   70.00%
Investment, Identifier [Axis]: 123Dentist, Inc.    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.03% [1],[4],[5],[6],[7] 0.03% [3],[8],[9],[10],[11]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[8],[9],[10],[11] $ 1,220  
Ending balance 1,140 [1],[4],[5],[6],[7] $ 1,220 [3],[8],[9],[10],[11]
Investment, Identifier [Axis]: 123Dentist, Inc., Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 327 270
Fair Value $ (75) $ (18)
Investment, Identifier [Axis]: ACI Group Holdings, Inc.    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 2.50% [1],[4],[5],[7],[12] 2.48% [2],[3],[8],[9],[11]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [2],[3],[8],[9],[11] $ 103,013  
Ending balance 104,567 [1],[4],[5],[7],[12] $ 103,013 [2],[3],[8],[9],[11]
Investment, Identifier [Axis]: ACI Group Holdings, Inc., Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 23,709 26,295
Fair Value 0 0
Investment, Identifier [Axis]: ACI Group Holdings, Inc., Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 11,567 10,295
Fair Value 0 $ 0
Investment, Identifier [Axis]: ADCS Clinics Intermediate Holdings, LLC    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[8],[11],[13]   0.20%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[8],[11],[13] $ 8,419  
Ending balance [3],[8],[11],[13]   $ 8,419
Investment, Identifier [Axis]: ADCS Clinics Intermediate Holdings, LLC 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[4],[7],[14] 0.16%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[4],[7],[14] $ 6,765  
Investment, Identifier [Axis]: ADCS Clinics Intermediate Holdings, LLC 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[4],[7],[14] 0.04%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[4],[7],[14] $ 1,624  
Investment, Identifier [Axis]: ADCS Clinics Intermediate Holdings, LLC, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 468 468
Fair Value 0 0
Investment, Identifier [Axis]: ADCS Clinics Intermediate Holdings, LLC, Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 1,301 1,301
Fair Value $ (26) $ (26)
Investment, Identifier [Axis]: AGI Group Holdings LP - A2 Units    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.02% [1],[7] 0.02% [2],[3],[11]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [2],[3],[11] $ 724  
Ending balance $ 839 [1],[7] $ 724 [2],[3],[11]
Investment, Identifier [Axis]: AGI-CFI Holdings, Inc.    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 2.25% [1],[5],[7] 2.29% [3],[9],[11]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[9],[11] $ 95,431  
Ending balance $ 94,228 [1],[5],[7] $ 95,431 [3],[9],[11]
Investment, Identifier [Axis]: AI Altius Bidco, Inc. 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.03% [1],[4],[5],[7],[12] 0.13% [2],[3],[8],[9],[11]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [2],[3],[8],[9],[11] $ 5,300  
Ending balance $ 1,260 [1],[4],[5],[7],[12] $ 5,300 [2],[3],[8],[9],[11]
Investment, Identifier [Axis]: AI Altius Bidco, Inc. 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.13% [1],[5],[7],[12] 0.02% [2],[3],[11],[15]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [2],[3],[11],[15] $ 808  
Ending balance $ 5,315 [1],[5],[7],[12] $ 808 [2],[3],[11],[15]
Investment, Identifier [Axis]: AI Altius Bidco, Inc. 3    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[7],[12],[16] 0.02%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[7],[12],[16] $ 848  
Investment, Identifier [Axis]: AI Altius Bidco, Inc., Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 158 1,446
Fair Value $ 0 $ (14)
Investment, Identifier [Axis]: ALKU, LLC 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 1.78% [1],[5],[7] 1.80% [3],[9],[11]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[9],[11] $ 74,904  
Ending balance $ 74,704 [1],[5],[7] $ 74,904 [3],[9],[11]
Investment, Identifier [Axis]: ALKU, LLC 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.91% [1],[5],[7] 0.92% [3],[9],[11]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[9],[11] $ 38,118  
Ending balance $ 38,022 [1],[5],[7] $ 38,118 [3],[9],[11]
Investment, Identifier [Axis]: ASP Endeavor Acquisition, LLC    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.30% [1],[7],[12],[17] 0.31% [2],[3],[11],[18]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [2],[3],[11],[18] $ 13,042  
Ending balance $ 12,700 [1],[7],[12],[17] $ 13,042 [2],[3],[11],[18]
Investment, Identifier [Axis]: AVE Holdings I Corp.    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.02% [1],[7] 0.02% [2],[3],[11]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [2],[3],[11] $ 638  
Ending balance $ 649 [1],[7] $ 638 [2],[3],[11]
Investment, Identifier [Axis]: Abaco Energy Technologies, LLC    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.68% [1],[7],[19] 0.88% [3],[11],[20]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[11],[20] $ 36,437  
Ending balance 28,573 [1],[7],[19] $ 36,437 [3],[11],[20]
Investment, Identifier [Axis]: Albireo Energy, LLC    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [2],[3],[11],[13]   2.45%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [2],[3],[11],[13] $ 101,953  
Ending balance [2],[3],[11],[13]   $ 101,953
Investment, Identifier [Axis]: Albireo Energy, LLC 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[7],[12],[14] 0.14%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[7],[12],[14] $ 5,834  
Investment, Identifier [Axis]: Albireo Energy, LLC 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[7],[12],[14] 2.24%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[7],[12],[14] $ 93,684  
Investment, Identifier [Axis]: Alera Group, Inc.    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.09% [1],[5],[7] 0.09% [3],[8],[9],[11]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[8],[9],[11] $ 3,629  
Ending balance 3,602 [1],[5],[7] $ 3,629 [3],[8],[9],[11]
Investment, Identifier [Axis]: Allium Buyer LLC, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 1,552  
Fair Value 0  
Investment, Identifier [Axis]: Allium Buyer LLC, Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 242  
Fair Value 0  
Investment, Identifier [Axis]: Amerilife Holdings, LLC    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[8],[9],[11]   0.05%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[8],[9],[11] $ 2,076  
Ending balance [3],[8],[9],[11]   $ 2,076
Investment, Identifier [Axis]: Amerilife Holdings, LLC 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[4],[5],[7] 0.04%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[4],[5],[7] $ 1,776  
Investment, Identifier [Axis]: Amerilife Holdings, LLC 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[4],[5],[7] 0.01%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[4],[5],[7] $ 295  
Investment, Identifier [Axis]: Amerilife Holdings, LLC, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 150 150
Fair Value 0 0
Investment, Identifier [Axis]: Amerilife Holdings, LLC, Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 243 243
Fair Value $ (2) $ (2)
Investment, Identifier [Axis]: Amerivet Partners Management, Inc.    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.13% [1],[4],[5],[7],[12] 0.13% [2],[3],[8],[9],[11]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [2],[3],[8],[9],[11] $ 5,600  
Ending balance 5,624 [1],[4],[5],[7],[12] $ 5,600 [2],[3],[8],[9],[11]
Investment, Identifier [Axis]: Amerivet Partners Management, Inc., Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 2,538 2,605
Fair Value 0 0
Investment, Identifier [Axis]: Amerivet Partners Management, Inc., Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 589 589
Fair Value $ (24) $ (24)
Investment, Identifier [Axis]: Anaplan, Inc.    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.04% [1],[4],[5],[6],[7] 0.04% [3],[8],[9],[10]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[8],[9],[10] $ 1,747  
Ending balance 1,784 [1],[4],[5],[6],[7] $ 1,747 [3],[8],[9],[10]
Investment, Identifier [Axis]: Anaplan, Inc., Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 161 179
Fair Value $ (2) $ (21)
Investment, Identifier [Axis]: Apex Companies, LLC 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[4],[7],[14] 0.04%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[4],[7],[14] $ 1,487  
Investment, Identifier [Axis]: Apex Companies, LLC 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[7],[14] 0.00%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[7],[14] $ 69  
Investment, Identifier [Axis]: Apex Companies, LLC, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 369  
Fair Value $ (5)  
Investment, Identifier [Axis]: Armada Parent, Inc.    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.61% [1],[4],[5],[7] 0.61% [3],[8],[9],[11]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[8],[9],[11] $ 25,209  
Ending balance 25,353 [1],[4],[5],[7] $ 25,209 [3],[8],[9],[11]
Investment, Identifier [Axis]: Armada Parent, Inc., Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 1,250 1,250
Fair Value 0 0
Investment, Identifier [Axis]: Armada Parent, Inc., Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 3,000 3,000
Fair Value $ 0 $ (83)
Investment, Identifier [Axis]: Ascend Buyer, LLC 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.44% [1],[4],[5],[7] 0.45% [3],[8],[9],[11]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[8],[9],[11] $ 18,678  
Ending balance $ 18,442 [1],[4],[5],[7] $ 18,678 [3],[8],[9],[11]
Investment, Identifier [Axis]: Ascend Buyer, LLC 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.05% [1],[5],[7] 0.05% [3],[9],[11]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[9],[11] $ 1,975  
Ending balance 1,950 [1],[5],[7] $ 1,975 [3],[9],[11]
Investment, Identifier [Axis]: Ascend Buyer, LLC, Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 1,940 1,940
Fair Value $ 0 $ (19)
Investment, Identifier [Axis]: AxiomSL Group, Inc.    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.99% [1],[4],[7],[14] 1.00% [3],[8],[11],[13]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[8],[11],[13] $ 41,635  
Ending balance 41,303 [1],[4],[7],[14] $ 41,635 [3],[8],[11],[13]
Investment, Identifier [Axis]: AxiomSL Group, Inc., Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 2,949 2,949
Fair Value (29) (29)
Investment, Identifier [Axis]: AxiomSL Group, Inc., Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 3,221 3,221
Fair Value $ (48) $ (32)
Investment, Identifier [Axis]: BP Purchaser, LLC    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.17% [1],[5],[7] 0.17% [3],[9],[11]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[9],[11] $ 7,094  
Ending balance $ 6,966 [1],[5],[7] $ 7,094 [3],[9],[11]
Investment, Identifier [Axis]: BPPH2 Limited    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.77% [1],[6],[7],[12],[16] 0.76% [2],[3],[10],[11],[15]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [2],[3],[10],[11],[15] $ 31,794  
Ending balance 32,193 [1],[6],[7],[12],[16] $ 31,794 [2],[3],[10],[11],[15]
Investment, Identifier [Axis]: Barbri Holdings, Inc.    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[9],[11]   1.53%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[9],[11] $ 63,820  
Ending balance [3],[9],[11]   $ 63,820
Investment, Identifier [Axis]: Barbri Holdings, Inc. 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[5],[7] 1.51%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[5],[7] $ 63,439  
Investment, Identifier [Axis]: Bazaarvoice, Inc.    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 5.44% [1],[4],[7],[16] 5.49% [3],[8],[11],[15]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[8],[11],[15] $ 228,477  
Ending balance 227,900 [1],[4],[7],[16] $ 228,477 [3],[8],[11],[15]
Investment, Identifier [Axis]: Bazaarvoice, Inc., Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 28,662 28,662
Fair Value 0 $ 0
Investment, Identifier [Axis]: Benefytt Technologies, Inc.    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[8],[9],[11]   0.26%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[8],[9],[11] $ 10,896  
Ending balance [3],[8],[9],[11]   $ 10,896
Investment, Identifier [Axis]: Benefytt Technologies, Inc. 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[5],[7],[21] 0.12%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[5],[7],[21] $ 5,155  
Investment, Identifier [Axis]: Benefytt Technologies, Inc. 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[4],[5],[7],[21] 0.03%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[4],[5],[7],[21] $ 1,260  
Investment, Identifier [Axis]: Benefytt Technologies, Inc., Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 343 397
Fair Value $ 0 $ 0
Investment, Identifier [Axis]: Blackstone Donegal Holdings LP - LP Interests (Westland Insurance Group LTD)    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 1.24% [1],[6],[7],[12],[22] 1.36% [2],[3],[10],[11],[23]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [2],[3],[10],[11],[23] $ 56,584  
Ending balance $ 51,943 [1],[6],[7],[12],[22] $ 56,584 [2],[3],[10],[11],[23]
Investment, Identifier [Axis]: BlueCat Networks USA, Inc.    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.05% [1],[4],[5],[6],[7] 0.05% [3],[8],[9],[10]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[8],[9],[10] $ 1,913  
Ending balance 1,918 [1],[4],[5],[6],[7] $ 1,913 [3],[8],[9],[10]
Investment, Identifier [Axis]: BlueCat Networks USA, Inc., Delayed Draw Term Loan 1    
Schedule of Investments [Line Items]    
Unfunded commitments 309 309
Fair Value 0 0
Investment, Identifier [Axis]: BlueCat Networks USA, Inc., Delayed Draw Term Loan 2    
Schedule of Investments [Line Items]    
Unfunded commitments 341 341
Fair Value $ 0 $ (3)
Investment, Identifier [Axis]: Box Co-Invest Blocker, LLC    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.01% [1],[7] 0.02% [2],[3],[11]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [2],[3],[11] $ 625  
Ending balance $ 527 [1],[7] $ 625 [2],[3],[11]
Investment, Identifier [Axis]: Bution Holdco 2, Inc.    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 1.73% [1],[7],[14] 1.75% [3],[11],[13]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[11],[13] $ 72,809  
Ending balance 72,496 [1],[7],[14] $ 72,809 [3],[11],[13]
Investment, Identifier [Axis]: CCBlue Bidco, Inc.    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[8],[9],[11]   0.24%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[8],[9],[11] $ 9,853  
Ending balance [3],[8],[9],[11]   $ 9,853
Investment, Identifier [Axis]: CCBlue Bidco, Inc. 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[5],[7] 0.22%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[5],[7] $ 9,249  
Investment, Identifier [Axis]: CCBlue Bidco, Inc. 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[4],[5],[7] 0.01%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[4],[5],[7] $ 464  
Investment, Identifier [Axis]: CCBlue Bidco, Inc., Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 1,404 1,408
Fair Value $ 0 $ 0
Investment, Identifier [Axis]: CFGI Holdings, LLC    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [5] 0.18% [1],[4],[7] 0.18% [3],[8],[9],[11]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[5],[8],[9],[11] $ 7,565  
Ending balance [5] 7,522 [1],[4],[7] $ 7,565 [3],[8],[9],[11]
Investment, Identifier [Axis]: CFGI Holdings, LLC, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments   1,200
Fair Value   (12)
Investment, Identifier [Axis]: CFGI Holdings, LLC, Delayed Draw Term Loan 1    
Schedule of Investments [Line Items]    
Unfunded commitments 1,200  
Fair Value (12)  
Investment, Identifier [Axis]: CFGI Holdings, LLC, Delayed Draw Term Loan 2    
Schedule of Investments [Line Items]    
Unfunded commitments 607  
Fair Value 0  
Investment, Identifier [Axis]: CFGI Holdings, LLC, Delayed Draw Term Loan 3    
Schedule of Investments [Line Items]    
Unfunded commitments 96  
Fair Value 0  
Investment, Identifier [Axis]: CFGI Holdings, LLC, Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments   1,050
Fair Value   $ (21)
Investment, Identifier [Axis]: CFGI Holdings, LLC, Revolver 1    
Schedule of Investments [Line Items]    
Unfunded commitments 1,050  
Fair Value (21)  
Investment, Identifier [Axis]: CFGI Holdings, LLC, Revolver 2    
Schedule of Investments [Line Items]    
Unfunded commitments 94  
Fair Value $ 0  
Investment, Identifier [Axis]: COP Home Services TopCo IV, Inc.    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.52% [1],[4],[7],[12],[14] 0.51% [2],[3],[8],[11],[13]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [2],[3],[8],[11],[13] $ 21,233  
Ending balance $ 21,638 [1],[4],[7],[12],[14] $ 21,233 [2],[3],[8],[11],[13]
Investment, Identifier [Axis]: COP Home Services TopCo IV, Inc. 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.17% [1],[7],[12],[14] 0.17% [2],[3],[11],[13]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [2],[3],[11],[13] $ 7,178  
Ending balance 7,253 [1],[7],[12],[14] $ 7,178 [2],[3],[11],[13]
Investment, Identifier [Axis]: COP Home Services TopCo IV, Inc. Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 1,978  
Fair Value 0  
Investment, Identifier [Axis]: COP Home Services TopCo IV, Inc., Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 1,705 1,941
Fair Value 0 $ (21)
Investment, Identifier [Axis]: CPI Buyer, LLC    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[8],[9],[11]   0.70%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[8],[9],[11] $ 29,089  
Ending balance [3],[8],[9],[11]   $ 29,089
Investment, Identifier [Axis]: CPI Buyer, LLC 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[5],[7] 0.65%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[5],[7] $ 27,288  
Investment, Identifier [Axis]: CPI Buyer, LLC 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[4],[5],[7] 0.07%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[4],[5],[7] $ 2,781  
Investment, Identifier [Axis]: CPI Buyer, LLC, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 6,649 7,778
Fair Value 0 0
Investment, Identifier [Axis]: CPI Buyer, LLC, Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 3,214 3,214
Fair Value $ (64) $ (64)
Investment, Identifier [Axis]: CPI Intermediate Holdings Inc    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.10% [1],[4],[5],[7] 0.09% [3],[8],[9],[11]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[8],[9],[11] $ 3,943  
Ending balance 3,984 [1],[4],[5],[7] $ 3,943 [3],[8],[9],[11]
Investment, Identifier [Axis]: CPI Intermediate Holdings Inc, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 966 966
Fair Value $ 0 $ (10)
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],[6],[7] 0.00% [2],[3],[10],[11]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [2],[3],[10],[11] $ 1  
Ending balance $ 1 [1],[6],[7] $ 1 [2],[3],[10],[11]
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],[6],[7] 0.00% [2],[3],[10],[11]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [2],[3],[10],[11] $ 53  
Ending balance $ 53 [1],[6],[7] $ 53 [2],[3],[10],[11]
Investment, Identifier [Axis]: Caerus US 1, Inc. 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.23% [1],[4],[5],[6],[7] 0.25% [3],[8],[9],[10],[11]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[8],[9],[10],[11] $ 10,207  
Ending balance $ 9,748 [1],[4],[5],[6],[7] $ 10,207 [3],[8],[9],[10],[11]
Investment, Identifier [Axis]: Caerus US 1, Inc. 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.01% [1],[4],[5],[6],[7] 0.05% [3],[8],[9],[10],[11]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[8],[9],[10],[11] $ 2,170  
Ending balance $ 622 [1],[4],[5],[6],[7] $ 2,170 [3],[8],[9],[10],[11]
Investment, Identifier [Axis]: Caerus US 1, Inc. 3    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[4],[5],[6],[7] 0.05%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[4],[5],[6],[7] $ 2,189  
Investment, Identifier [Axis]: Caerus US 1, Inc., Delayed Draw Term Loan 1    
Schedule of Investments [Line Items]    
Unfunded commitments 1,506 1,506
Fair Value (15) (15)
Investment, Identifier [Axis]: Caerus US 1, Inc., Delayed Draw Term Loan 2    
Schedule of Investments [Line Items]    
Unfunded commitments 320 320
Fair Value 0 0
Investment, Identifier [Axis]: Caerus US 1, Inc., Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 652  
Fair Value $ 0  
Investment, Identifier [Axis]: Caerus US 1, Inc., Revolver 1    
Schedule of Investments [Line Items]    
Unfunded commitments   732
Fair Value   0
Investment, Identifier [Axis]: Caerus US 1, Inc., Revolver 2    
Schedule of Investments [Line Items]    
Unfunded commitments   233
Fair Value   $ (5)
Investment, Identifier [Axis]: Cambium Holdings, LLC - Senior Preferred Interests    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.36% [1],[7] 0.36% [2],[3],[11]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [2],[3],[11] $ 15,135  
Ending balance $ 15,078 [1],[7] $ 15,135 [2],[3],[11]
Investment, Identifier [Axis]: Cambium Learning Group, Inc.    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 6.95% [1],[4],[5],[7] 7.02% [3],[8],[9],[11]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[8],[9],[11] $ 292,101  
Ending balance 291,362 [1],[4],[5],[7] $ 292,101 [3],[8],[9],[11]
Investment, Identifier [Axis]: Cambium Learning Group, Inc., Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 43,592 43,592
Fair Value 0 $ 0
Investment, Identifier [Axis]: Canadian Hospital Specialties Ltd.    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [2],[3],[8],[10],[11],[13]   0.55%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [2],[3],[8],[10],[11],[13] $ 22,786  
Ending balance [2],[3],[8],[10],[11],[13]   $ 22,786
Investment, Identifier [Axis]: Canadian Hospital Specialties Ltd. 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[6],[7],[12],[14] 0.54%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[6],[7],[12],[14] $ 22,740  
Investment, Identifier [Axis]: Canadian Hospital Specialties Ltd. 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.04% [1],[4],[5],[6],[7],[12] 0.17% [2],[3],[10],[11],[15]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [2],[3],[10],[11],[15] $ 7,171  
Ending balance $ 1,547 [1],[4],[5],[6],[7],[12] $ 7,171 [2],[3],[10],[11],[15]
Investment, Identifier [Axis]: Canadian Hospital Specialties Ltd. 3    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[6],[7],[12],[16] 0.17%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[6],[7],[12],[16] $ 7,044  
Investment, Identifier [Axis]: Canadian Hospital Specialties Ltd., Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 5,272 5,647
Fair Value 0 0
Investment, Identifier [Axis]: Canadian Hospital Specialties Ltd., Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 1,093 1,376
Fair Value $ 0 $ 0
Investment, Identifier [Axis]: Capstone Logistics, LLC    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.13% [1],[7],[14] 0.13% [3],[11],[13]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[11],[13] $ 5,350  
Ending balance $ 5,350 [1],[7],[14] $ 5,350 [3],[11],[13]
Investment, Identifier [Axis]: Circana Group L.P. 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[5],[7] 2.86%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[5],[7] $ 120,038  
Investment, Identifier [Axis]: Circana Group L.P. 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[4],[5],[7] 0.04%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[4],[5],[7] $ 1,794  
Investment, Identifier [Axis]: Circana Group L.P. 3    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[5],[7] 1.78%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[5],[7] $ 74,543  
Investment, Identifier [Axis]: Circana Group L.P., Revolver 1    
Schedule of Investments [Line Items]    
Unfunded commitments 7,453  
Fair Value 0  
Investment, Identifier [Axis]: Circana Group L.P., Revolver 2    
Schedule of Investments [Line Items]    
Unfunded commitments 4,416  
Fair Value 0  
Investment, Identifier [Axis]: Clearview Buyer, Inc.    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [2],[3],[8],[9]   0.22%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [2],[3],[8],[9] $ 9,001  
Ending balance [2],[3],[8],[9]   $ 9,001
Investment, Identifier [Axis]: Clearview Buyer, Inc. 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[4],[5],[7],[12] 0.21%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[4],[5],[7],[12] $ 8,996  
Investment, Identifier [Axis]: Clearview Buyer, Inc. 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[4],[5],[7],[12] 0.01%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[4],[5],[7],[12] $ 296  
Investment, Identifier [Axis]: Clearview Buyer, Inc., Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 3,668 3,668
Fair Value 0 0
Investment, Identifier [Axis]: Clearview Buyer, Inc., Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 584 898
Fair Value $ 0 $ (18)
Investment, Identifier [Axis]: Cobham Holdings, Inc.    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[4],[5],[7] 0.05%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[4],[5],[7] $ 1,929  
Investment, Identifier [Axis]: Cobham Holdings, Inc., Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 376  
Fair Value $ (11)  
Investment, Identifier [Axis]: Color Intermediate LLC    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.48% [1],[5],[7] 0.48% [3],[9],[11]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[9],[11] $ 19,906  
Ending balance $ 20,109 [1],[5],[7] $ 19,906 [3],[9],[11]
Investment, Identifier [Axis]: Community Brands ParentCo, LLC    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.12% [1],[4],[5],[7],[12] 0.12% [2],[3],[8],[9]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [2],[3],[8],[9] $ 4,850  
Ending balance 4,838 [1],[4],[5],[7],[12] $ 4,850 [2],[3],[8],[9]
Investment, Identifier [Axis]: Community Brands ParentCo, LLC, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 588 588
Fair Value (6) (6)
Investment, Identifier [Axis]: Community Brands ParentCo, LLC, Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 345 345
Fair Value $ (7) $ (7)
Investment, Identifier [Axis]: Confine Visual Bidco    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.35% [1],[4],[5],[6],[7] 0.36% [3],[8],[9],[10]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[8],[9],[10] $ 15,092  
Ending balance 14,721 [1],[4],[5],[6],[7] $ 15,092 [3],[8],[9],[10]
Investment, Identifier [Axis]: Confine Visual Bidco, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 3,046 3,046
Fair Value $ 0 $ 0
Investment, Identifier [Axis]: Connatix Buyer, Inc.    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.49% [1],[4],[5],[7],[12] 0.51% [2],[3],[8],[9]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [2],[3],[8],[9] $ 21,220  
Ending balance 20,633 [1],[4],[5],[7],[12] $ 21,220 [2],[3],[8],[9]
Investment, Identifier [Axis]: Connatix Buyer, Inc., Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 10,900 10,900
Fair Value (109) (109)
Investment, Identifier [Axis]: Connatix Buyer, Inc., Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 5,431 5,431
Fair Value $ (204) $ (109)
Investment, Identifier [Axis]: Connatix Parent, LLC - Class L Common Units    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.00% [1],[7] 0.01% [2],[3],[11]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [2],[3],[11] $ 256  
Ending balance $ 206 [1],[7] $ 256 [2],[3],[11]
Investment, Identifier [Axis]: Corfin Holdings, Inc. 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 4.65% [1],[7],[14] 4.70% [3],[11],[13]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[11],[13] $ 195,405  
Ending balance $ 194,902 [1],[7],[14] $ 195,405 [3],[11],[13]
Investment, Identifier [Axis]: Corfin Holdings, Inc. 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.02% [1],[5],[7] 1.63% [3],[11],[13]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[11],[13] $ 67,874  
Ending balance $ 935 [1],[5],[7] $ 67,874 [3],[11],[13]
Investment, Identifier [Axis]: Corfin Holdings, Inc. 3    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[7],[14] 1.62%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[7],[14] $ 67,702  
Investment, Identifier [Axis]: Coupa Software Inc.    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[4],[5],[6],[7] 0.04%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[4],[5],[6],[7] $ 1,785  
Investment, Identifier [Axis]: Coupa Software Inc., Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 164  
Fair Value (2)  
Investment, Identifier [Axis]: Coupa Software Inc., Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 126  
Fair Value $ (3)  
Investment, Identifier [Axis]: Cross Country Healthcare, Inc.    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.16% [1],[5],[7] 0.16% [3],[9],[11]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[9],[11] $ 6,582  
Ending balance $ 6,582 [1],[5],[7] $ 6,582 [3],[9],[11]
Investment, Identifier [Axis]: Cumming Group, Inc. 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 1.86% [1],[4],[7],[14] 1.71% [3]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[8],[11],[13] $ 71,088  
Ending balance $ 77,873 [1],[4],[7],[14] $ 71,088 [3],[8],[11],[13]
Investment, Identifier [Axis]: Cumming Group, Inc. 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.03% [1],[4],[7],[14] 0.02% [3],[11],[13]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[11],[13] $ 970  
Ending balance 1,209 [1],[4],[7],[14] $ 970 [3],[11],[13]
Investment, Identifier [Axis]: Cumming Group, Inc., Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 343 7,896
Fair Value 0 (79)
Investment, Identifier [Axis]: Cumming Group, Inc., Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 12,695 11,923
Fair Value $ (381) $ 0
Investment, Identifier [Axis]: CustomInk, LLC    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 3.90% [1],[7],[14],[24] 3.93% [3],[11],[13]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[11],[13] $ 163,594  
Ending balance $ 163,586 [1],[7],[14],[24] $ 163,594 [3],[11],[13]
Investment, Identifier [Axis]: CustomInk, LLC - Series A Preferred Units    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.16% [1],[7] 0.16% [2],[3],[11]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [2],[3],[11] $ 6,521  
Ending balance 6,877 [1],[7] $ 6,521 [2],[3],[11]
Investment, Identifier [Axis]: DCA Investment Holdings, LLC    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[8],[9],[11]   0.79%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[8],[9],[11] $ 32,749  
Ending balance [3],[8],[9],[11]   $ 32,749
Investment, Identifier [Axis]: DCA Investment Holdings, LLC 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[4],[5],[7] 0.76%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[4],[5],[7] $ 31,974  
Investment, Identifier [Axis]: DCA Investment Holdings, LLC 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[4],[5],[7] 0.01%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[4],[5],[7] $ 243  
Investment, Identifier [Axis]: DCA Investment Holdings, LLC, Delayed Draw Term Loan 1    
Schedule of Investments [Line Items]    
Unfunded commitments 736 169
Fair Value $ 0 0
Investment, Identifier [Axis]: DCA Investment Holdings, LLC, Delayed Draw Term Loan 2    
Schedule of Investments [Line Items]    
Unfunded commitments   1,000
Fair Value   $ (15)
Investment, Identifier [Axis]: Dana Kepner Company, LLC 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 1.50% [1],[7],[14] 1.51% [3],[11],[13]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[11],[13] $ 62,975  
Ending balance $ 62,815 [1],[7],[14] $ 62,975 [3],[11],[13]
Investment, Identifier [Axis]: Dana Kepner Company, LLC 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.05% [1],[7],[14] 0.05% [3],[11],[13]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[11],[13] $ 1,985  
Ending balance $ 1,980 [1],[7],[14] $ 1,985 [3],[11],[13]
Investment, Identifier [Axis]: Deneb Ultimate Topco, LLC - Class A Units    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.00% [1],[7] 0.00% [2],[3],[11]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [2],[3],[11] $ 168  
Ending balance $ 164 [1],[7] $ 168 [2],[3],[11]
Investment, Identifier [Axis]: Diligent Corporation    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 1.36% [1],[7],[14] 1.38% [3],[11],[13]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[11],[13] $ 57,182  
Ending balance $ 57,036 [1],[7],[14] $ 57,182 [3],[11],[13]
Investment, Identifier [Axis]: Discovery Education, Inc.    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.61% [1],[4],[5],[7] 0.61% [3],[8],[9],[11]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[8],[9],[11] $ 25,565  
Ending balance 25,722 [1],[4],[5],[7] $ 25,565 [3],[8],[9],[11]
Investment, Identifier [Axis]: Discovery Education, Inc., Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 6,773 6,773
Fair Value 0 0
Investment, Identifier [Axis]: Discovery Education, Inc., Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 2,960 2,960
Fair Value $ 0 $ (104)
Investment, Identifier [Axis]: Doc Generici (Diocle S.p.A.)    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.04% [1],[4],[6],[7],[16] 0.04% [3],[8],[10],[11],[15]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[8],[10],[11],[15] $ 1,688  
Ending balance 1,556 [1],[4],[6],[7],[16] $ 1,688 [3],[8],[10],[11],[15]
Investment, Identifier [Axis]: Doc Generici (Diocle S.p.A.), Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 1,380 1,195
Fair Value $ (307) $ (141)
Investment, Identifier [Axis]: Donuts, Inc.    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 7.60% [1],[7],[14] 7.68% [3],[11],[13]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[11],[13] $ 319,245  
Ending balance $ 318,430 [1],[7],[14] $ 319,245 [3],[11],[13]
Investment, Identifier [Axis]: Dreambox Learning Holding LLC    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.16% [1],[5],[7],[12] 0.16% [2],[3],[9],[11]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [2],[3],[9],[11] $ 6,661  
Ending balance $ 6,661 [1],[5],[7],[12] $ 6,661 [2],[3],[9],[11]
Investment, Identifier [Axis]: EIS Acquisition Holdings, LP - Class A Common Units    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.36% [1],[7] 0.32% [2],[3],[11]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [2],[3],[11] $ 13,282  
Ending balance $ 15,140 [1],[7] $ 13,282 [2],[3],[11]
Investment, Identifier [Axis]: ENV BIDCO AB, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments   260
Fair Value   $ 0
Investment, Identifier [Axis]: ENV Bidco AB 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.02% [1],[5],[6],[7] 0.02% [3],[9],[10],[11]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[9],[10],[11] $ 981  
Ending balance $ 991 [1],[5],[6],[7] $ 981 [3],[9],[10],[11]
Investment, Identifier [Axis]: ENV Bidco AB 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.03% [1],[4],[6],[7],[16] 0.03% [3],[8],[10],[11],[15]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[8],[10],[11],[15] $ 1,179  
Ending balance 1,176 [1],[4],[6],[7],[16] $ 1,179 [3],[8],[10],[11],[15]
Investment, Identifier [Axis]: ENV Bidco AB, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 300  
Fair Value $ (24)  
Investment, Identifier [Axis]: Eagle Midstream Canada Finance, Inc.    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 1.77% [1],[5],[6],[7] 1.77% [3],[9],[10],[11]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[9],[10],[11] $ 73,529  
Ending balance $ 74,089 [1],[5],[6],[7] $ 73,529 [3],[9],[10],[11]
Investment, Identifier [Axis]: Edifecs, Inc. 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 5.27% [1],[7],[14] 0.32% [3],[9],[11]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[9],[11] $ 13,449  
Ending balance $ 220,787 [1],[7],[14] $ 13,449 [3],[9],[11]
Investment, Identifier [Axis]: Edifecs, Inc. 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.14% [1],[5],[7] 5.38% [3],[11],[13]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[11],[13] $ 223,544  
Ending balance $ 5,749 [1],[5],[7] $ 223,544 [3],[11],[13]
Investment, Identifier [Axis]: Edifecs, Inc. 3    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[5],[7] 0.19%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[5],[7] $ 7,802  
Investment, Identifier [Axis]: Emergency Power Holdings, LLC    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 1.04% [1],[4],[7],[12],[14] 1.05% [2],[3],[8],[11],[13]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [2],[3],[8],[11],[13] $ 43,486  
Ending balance 43,375 [1],[4],[7],[12],[14] $ 43,486 [2],[3],[8],[11],[13]
Investment, Identifier [Axis]: Emergency Power Holdings, LLC, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 18,700 18,700
Fair Value $ (187) $ (187)
Investment, Identifier [Axis]: Episerver, Inc.    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.21% [1],[4],[7],[12],[14] 0.22% [2],[3],[8],[13]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [2],[3],[8],[13] $ 9,117  
Ending balance 8,918 [1],[4],[7],[12],[14] $ 9,117 [2],[3],[8],[13]
Investment, Identifier [Axis]: Episerver, Inc., Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 2,064 2,064
Fair Value $ (124) $ (93)
Investment, Identifier [Axis]: Epoch Acquisition, Inc.    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.58% [1],[7],[14] 0.58% [3],[11],[13]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[11],[13] $ 24,185  
Ending balance $ 24,123 [1],[7],[14] $ 24,185 [3],[11],[13]
Investment, Identifier [Axis]: Expedition Holdco, LLC - Class A Units    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.00% [1],[7] 0.00% [2],[3],[11]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [2],[3],[11] $ 44  
Ending balance $ 40 [1],[7] $ 44 [2],[3],[11]
Investment, Identifier [Axis]: Expedition Holdco, LLC - Class B Units    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.00% [1],[7] 0.00% [2],[3],[11]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [2],[3],[11] $ 21  
Ending balance $ 14 [1],[7] $ 21 [2],[3],[11]
Investment, Identifier [Axis]: Experity, Inc.    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.34% [1],[4],[5],[7],[12] 0.35% [2],[3],[8],[9]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [2],[3],[8],[9] $ 14,677  
Ending balance 14,448 [1],[4],[5],[7],[12] $ 14,677 [2],[3],[8],[9]
Investment, Identifier [Axis]: Experity, Inc., Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 1,495 1,495
Fair Value $ (45) $ (30)
Investment, Identifier [Axis]: Fencing Supply Group Acquisition, LLC    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 1.25% [1],[7],[12],[14] 1.25% [2],[3],[11],[13]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [2],[3],[11],[13] $ 52,187  
Ending balance $ 52,187 [1],[7],[12],[14] $ 52,187 [2],[3],[11],[13]
Investment, Identifier [Axis]: Foundation Risk Partners Corp.    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.60% [1],[4],[5],[7] 0.65% [3],[8],[9],[11]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[8],[9],[11] $ 26,881  
Ending balance 25,051 [1],[4],[5],[7] $ 26,881 [3],[8],[9],[11]
Investment, Identifier [Axis]: Foundation Risk Partners Corp., Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 2,382 1,401
Fair Value $ (36) $ 0
Investment, Identifier [Axis]: Frontline Road Safety Investments, LLC - Class A Common Units    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.05% [1],[7] 0.05% [2],[3],[11]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [2],[3],[11] $ 1,920  
Ending balance 2,046 [1],[7] $ 1,920 [2],[3],[11]
Investment, Identifier [Axis]: Frontline Road Safety, LLC    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[9],[11]   2.04%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[9],[11] $ 84,648  
Ending balance [3],[9],[11]   $ 84,648
Investment, Identifier [Axis]: Frontline Road Safety, LLC 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[5],[7] 1.86%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[5],[7] $ 78,067  
Investment, Identifier [Axis]: Frontline Road Safety, LLC 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[5],[7] 0.19%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[5],[7] $ 7,938  
Investment, Identifier [Axis]: GCX Corporation Buyer, LLC    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [2],[3],[8],[9],[11]   0.64%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [2],[3],[8],[9],[11] $ 26,661  
Ending balance [2],[3],[8],[9],[11]   $ 26,661
Investment, Identifier [Axis]: GCX Corporation Buyer, LLC 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[5],[7],[12] 0.51%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[5],[7],[12] $ 21,237  
Investment, Identifier [Axis]: GCX Corporation Buyer, LLC 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[4],[5],[7],[12] 0.13%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[4],[5],[7],[12] $ 5,370  
Investment, Identifier [Axis]: GCX Corporation Buyer, LLC, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 2,000 2,000
Fair Value $ 0 $ 0
Investment, Identifier [Axis]: GCX Corporation Group Holdings, L.P. - Class A-2 Units    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.01% [1],[7] 0.01% [2],[3],[11]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [2],[3],[11] $ 324  
Ending balance 324 [1],[7] $ 324 [2],[3],[11]
Investment, Identifier [Axis]: GI Ranger Intermediate, LLC    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[8],[9],[11]   0.38%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[8],[9],[11] $ 15,725  
Ending balance [3],[8],[9],[11]   $ 15,725
Investment, Identifier [Axis]: GI Ranger Intermediate, LLC 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[5],[7] 0.30%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[5],[7] $ 12,723  
Investment, Identifier [Axis]: GI Ranger Intermediate, LLC 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[4],[5],[7] 0.07%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[4],[5],[7] $ 2,841  
Investment, Identifier [Axis]: GI Ranger Intermediate, LLC 3    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[4],[5],[7] 0.00%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[4],[5],[7] $ 102  
Investment, Identifier [Axis]: GI Ranger Intermediate, LLC, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 3,040 3,040
Fair Value 0 0
Investment, Identifier [Axis]: GI Ranger Intermediate, LLC, Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 1,080 1,080
Fair Value 0 $ 0
Investment, Identifier [Axis]: Galway Borrower, LLC    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [2],[3],[8],[9],[11]   0.52%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [2],[3],[8],[9],[11] $ 21,577  
Ending balance [2],[3],[8],[9],[11]   $ 21,577
Investment, Identifier [Axis]: Galway Borrower, LLC 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[4],[5],[7],[12] 0.47%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[4],[5],[7],[12] $ 19,543  
Investment, Identifier [Axis]: Galway Borrower, LLC 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[4],[5],[7],[12] 0.01%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[4],[5],[7],[12] $ 412  
Investment, Identifier [Axis]: Galway Borrower, LLC, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 279 274
Fair Value (3) 0
Investment, Identifier [Axis]: Galway Borrower, LLC, Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 1,659 2,113
Fair Value $ 0 $ (53)
Investment, Identifier [Axis]: Genuine Cable Group, LLC    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 4.20% [1],[5],[7] 4.24% [3],[9],[11]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[9],[11] $ 176,389  
Ending balance $ 175,943 [1],[5],[7] $ 176,389 [3],[9],[11]
Investment, Identifier [Axis]: Gigamon Inc.    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.17% [1],[4],[7],[14] 0.18% [3],[8],[11],[13]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[8],[11],[13] $ 7,293  
Ending balance 7,287 [1],[4],[7],[14] $ 7,293 [3],[8],[11],[13]
Investment, Identifier [Axis]: Gigamon Inc., Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 437 437
Fair Value (5) $ (10)
Investment, Identifier [Axis]: Go Car Wash Management Corp.    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[8],[11],[25]   0.53%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[8],[11],[25] $ 21,954  
Ending balance [3],[8],[11],[25]   $ 21,954
Investment, Identifier [Axis]: Go Car Wash Management Corp. 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[7],[26] 0.25%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[7],[26] $ 10,281  
Investment, Identifier [Axis]: Go Car Wash Management Corp. 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[4],[7],[14] 0.28%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[4],[7],[14] $ 11,617  
Investment, Identifier [Axis]: Go Car Wash Management Corp., Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 1,057 1,057
Fair Value $ 0 $ 0
Investment, Identifier [Axis]: GovernmentJobs.com, Inc.    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.11% [1],[4],[5],[7] 0.12% [3],[8],[9],[11]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[8],[9],[11] $ 4,828  
Ending balance 4,795 [1],[4],[5],[7] $ 4,828 [3],[8],[9],[11]
Investment, Identifier [Axis]: GovernmentJobs.com, Inc., Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 2,144 2,144
Fair Value (43) (21)
Investment, Identifier [Axis]: GovernmentJobs.com, Inc., Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 677 677
Fair Value (14) $ (14)
Investment, Identifier [Axis]: GraphPAD Software, LLC    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[8],[11],[13]   0.63%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[8],[11],[13] $ 26,222  
Ending balance [3],[8],[11],[13]   $ 26,222
Investment, Identifier [Axis]: GraphPAD Software, LLC 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[4],[7],[14] 0.32%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[4],[7],[14] $ 13,220  
Investment, Identifier [Axis]: GraphPAD Software, LLC 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[4],[7],[14] 0.30%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[4],[7],[14] $ 12,606  
Investment, Identifier [Axis]: GraphPAD Software, LLC, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 6,429 6,429
Fair Value 0 (64)
Investment, Identifier [Axis]: GraphPAD Software, LLC, Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 2,124 2,124
Fair Value $ (32) $ (32)
Investment, Identifier [Axis]: Groundworks, LLC    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[4],[7],[14] 0.02%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[4],[7],[14] $ 690  
Investment, Identifier [Axis]: Groundworks, LLC, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 130  
Fair Value 0  
Investment, Identifier [Axis]: Groundworks, LLC, Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 42  
Fair Value $ 0  
Investment, Identifier [Axis]: Gruden Acquisition, Inc.    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.37% [1],[4],[7],[12],[14] 0.39% [2],[3],[8],[13]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [2],[3],[8],[13] $ 16,167  
Ending balance 15,554 [1],[4],[7],[12],[14] $ 16,167 [2],[3],[8],[13]
Investment, Identifier [Axis]: Gruden Acquisition, Inc., Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 2,040 2,100
Fair Value 0 (26)
Investment, Identifier [Axis]: Gruden Acquisition, Inc., Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 3,000 3,000
Fair Value $ 0 $ (38)
Investment, Identifier [Axis]: Guidehouse Holding Corp. - Preferred Equity    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.41% [1],[7] 0.40% [2],[3],[11]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [2],[3],[11] $ 16,637  
Ending balance $ 17,063 [1],[7] $ 16,637 [2],[3],[11]
Investment, Identifier [Axis]: Guidehouse, Inc.    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 7.59% [1],[5],[7],[12] 7.67% [2],[3],[9],[11]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [2],[3],[9],[11] $ 319,027  
Ending balance 318,222 [1],[5],[7],[12] $ 319,027 [2],[3],[9],[11]
Investment, Identifier [Axis]: HIG Orca Acquisition Holdings, Inc.    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3]   0.56%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3] $ 23,239  
Ending balance [3]   $ 23,239
Investment, Identifier [Axis]: HIG Orca Acquisition Holdings, Inc. 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[7],[12],[14] 0.45%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[7],[12],[14] $ 18,922  
Investment, Identifier [Axis]: HIG Orca Acquisition Holdings, Inc. 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[4],[7],[12],[14] 0.03%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[4],[7],[12],[14] $ 1,203  
Investment, Identifier [Axis]: HIG Orca Acquisition Holdings, Inc. 3    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[4],[7],[12],[14] 0.07%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[4],[7],[12],[14] $ 2,899  
Investment, Identifier [Axis]: HIG Orca Acquisition Holdings, Inc., Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 3,241 3,390
Fair Value 0 0
Investment, Identifier [Axis]: HIG Orca Acquisition Holdings, Inc., Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 1,851 1,542
Fair Value $ 0 $ 0
Investment, Identifier [Axis]: Healthcomp Holding Company, LLC    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[4],[7],[12],[14] 2.58%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[4],[7],[12],[14] $ 108,056  
Investment, Identifier [Axis]: Healthcomp Holding Company, LLC 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [2],[3],[11],[13]   1.83%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [2],[3],[11],[13] 76,247  
Ending balance [2],[3],[11],[13]   $ 76,247
Investment, Identifier [Axis]: Healthcomp Holding Company, LLC 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [2],[3],[8],[11],[13]   0.77%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [2],[3],[8],[11],[13] 32,085  
Ending balance [2],[3],[8],[11],[13]   $ 32,085
Investment, Identifier [Axis]: Healthcomp Holding Company, LLC, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 23,952 23,952
Fair Value 0 $ 0
Investment, Identifier [Axis]: Helix TS, LLC    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[8],[9],[11]   1.01%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[8],[9],[11] $ 42,083  
Ending balance [3],[8],[9],[11]   $ 42,083
Investment, Identifier [Axis]: Helix TS, LLC 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[5],[7] 0.50%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[5],[7] $ 20,756  
Investment, Identifier [Axis]: Helix TS, LLC 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[5],[7] 0.50%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[5],[7] $ 21,135  
Investment, Identifier [Axis]: Helix TS, LLC 3    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[4],[5],[7] 0.01%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[4],[5],[7] $ 376  
Investment, Identifier [Axis]: Helix TS, LLC, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 614  
Fair Value 0  
Investment, Identifier [Axis]: Helix TS, LLC, Delayed Draw Term Loan 1    
Schedule of Investments [Line Items]    
Unfunded commitments   138
Fair Value   0
Investment, Identifier [Axis]: Helix TS, LLC, Delayed Draw Term Loan 2    
Schedule of Investments [Line Items]    
Unfunded commitments   767
Fair Value   $ 0
Investment, Identifier [Axis]: High Street Buyer, Inc.    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [2],[3],[8],[9],[11]   1.47%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [2],[3],[8],[9],[11] $ 61,282  
Ending balance [2],[3],[8],[9],[11]   $ 61,282
Investment, Identifier [Axis]: High Street Buyer, Inc. 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[4],[5],[7],[12] 1.25%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[4],[5],[7],[12] $ 52,383  
Investment, Identifier [Axis]: High Street Buyer, Inc. 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[4],[5],[7],[12] 0.21%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[4],[5],[7],[12] $ 8,633  
Investment, Identifier [Axis]: High Street Buyer, Inc., Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 11,830 11,830
Fair Value 0 0
Investment, Identifier [Axis]: High Street Buyer, Inc., Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 2,254 2,254
Fair Value (45) $ (45)
Investment, Identifier [Axis]: IG Investments Holdings, LLC    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [2],[3],[8],[9]   1.15%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [2],[3],[8],[9] $ 47,915  
Ending balance [2],[3],[8],[9]   $ 47,915
Investment, Identifier [Axis]: IG Investments Holdings, LLC 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[4],[5],[7],[12] 0.03%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[4],[5],[7],[12] $ 1,281  
Investment, Identifier [Axis]: IG Investments Holdings, LLC 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[5],[7],[12] 1.08%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[5],[7],[12] $ 45,083  
Investment, Identifier [Axis]: IG Investments Holdings, LLC, Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 3,583 2,150
Fair Value (18) 0
Investment, Identifier [Axis]: ISQ Hawkey Holdco, Inc., Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments   90
Fair Value   0
Investment, Identifier [Axis]: ISQ Hawkey Holdco, Inc., Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments   91
Fair Value   $ (1)
Investment, Identifier [Axis]: ISQ Hawkeye Holdco, Inc.    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[8],[9],[11]   0.02%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[8],[9],[11] $ 893  
Ending balance [3],[8],[9],[11]   $ 893
Investment, Identifier [Axis]: ISQ Hawkeye Holdco, Inc. 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[5],[7] 0.02%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[5],[7] $ 716  
Investment, Identifier [Axis]: ISQ Hawkeye Holdco, Inc. 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[4],[5],[7] 0.00%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[4],[5],[7] $ 38  
Investment, Identifier [Axis]: ISQ Hawkeye Holdco, Inc. 3    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[4],[5],[7] 0.00%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[4],[5],[7] $ 176  
Investment, Identifier [Axis]: ISQ Hawkeye Holdco, Inc., Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 90  
Fair Value 0  
Investment, Identifier [Axis]: ISQ Hawkeye Holdco, Inc., Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 52  
Fair Value $ 0  
Investment, Identifier [Axis]: Infostretch Corporation    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.11% [1],[5],[7] 0.11% [3],[9],[11]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[9],[11] $ 4,776  
Ending balance $ 4,727 [1],[5],[7] $ 4,776 [3],[9],[11]
Investment, Identifier [Axis]: Inovalon Holdings, Inc.    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 2.53% [1],[4],[5],[7] 2.52% [3],[8],[9],[11]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[8],[9],[11] $ 104,979  
Ending balance $ 105,921 [1],[4],[5],[7] $ 104,979 [3],[8],[9],[11]
Investment, Identifier [Axis]: Inovalon Holdings, Inc. 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.26% [1],[5],[7],[12] 0.25% [2],[3],[9],[11]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [2],[3],[9],[11] $ 10,359  
Ending balance 10,769 [1],[5],[7],[12] $ 10,359 [2],[3],[9],[11]
Investment, Identifier [Axis]: Inovalon Holdings, Inc., Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 11,060 11,060
Fair Value (138) $ (138)
Investment, Identifier [Axis]: Integrity Marketing Acquisition, LLC    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [2],[3],[8],[9],[11]   3.39%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [2],[3],[8],[9],[11] $ 141,089  
Ending balance [2],[3],[8],[9],[11]   $ 141,089
Investment, Identifier [Axis]: Integrity Marketing Acquisition, LLC 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[7],[12],[14] 0.45%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[7],[12],[14] $ 18,991  
Investment, Identifier [Axis]: Integrity Marketing Acquisition, LLC 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[4],[5],[7],[12] 0.04%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[4],[5],[7],[12] $ 1,484  
Investment, Identifier [Axis]: Integrity Marketing Acquisition, LLC 3    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[5],[7],[12] 0.09%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[5],[7],[12] $ 3,917  
Investment, Identifier [Axis]: Integrity Marketing Acquisition, LLC 4    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[5],[7],[12] 2.77%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[5],[7],[12] $ 116,152  
Investment, Identifier [Axis]: Integrity Marketing Acquisition, LLC, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 347 347
Fair Value $ 0 $ 0
Investment, Identifier [Axis]: Investment Five    
Schedule of Investments [Line Items]    
Interest rate, floor 1.50% 1.50%
Investment, Identifier [Axis]: Investment Four    
Schedule of Investments [Line Items]    
Interest rate, floor 1.25% 1.25%
Investment, Identifier [Axis]: Investment One    
Schedule of Investments [Line Items]    
Interest rate, floor 0.50% 0.50%
Investment, Identifier [Axis]: Investment Six    
Schedule of Investments [Line Items]    
Interest rate, floor 2.00% 2.00%
Investment, Identifier [Axis]: Investment Three    
Schedule of Investments [Line Items]    
Interest rate, floor 1.00% 1.00%
Investment, Identifier [Axis]: Investment Two    
Schedule of Investments [Line Items]    
Interest rate, floor 0.75% 0.75%
Investment, Identifier [Axis]: Italian Motorway Holdings S.à.r.l    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 2.00% [1],[6],[7],[16] 1.96% [3],[10],[11],[15]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[10],[11],[15] $ 81,376  
Ending balance $ 83,910 [1],[6],[7],[16] $ 81,376 [3],[10],[11],[15]
Investment, Identifier [Axis]: JSS Holdings, Inc. 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 6.80% [1],[5],[7] 6.88% [3],[9],[11]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[9],[11] $ 285,912  
Ending balance $ 285,087 [1],[5],[7] $ 285,912 [3],[9],[11]
Investment, Identifier [Axis]: JSS Holdings, Inc. 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.12% [1],[5],[7] 0.12% [3],[9],[11]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[9],[11] $ 4,938  
Ending balance 4,925 [1],[5],[7] $ 4,938 [3],[9],[11]
Investment, Identifier [Axis]: Jacuzzi Brands, LLC    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[11],[13]   2.28%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[11],[13] $ 94,817  
Ending balance [3],[11],[13]   $ 94,817
Investment, Identifier [Axis]: Jacuzzi Brands, LLC 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[7],[14] 2.25%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[7],[14] $ 94,343  
Investment, Identifier [Axis]: Java Buyer, Inc.    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[8],[9],[11]   0.12%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[8],[9],[11] $ 4,815  
Ending balance [3],[8],[9],[11]   $ 4,815
Investment, Identifier [Axis]: Java Buyer, Inc. 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[5],[7] 0.09%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[5],[7] $ 3,945  
Investment, Identifier [Axis]: Java Buyer, Inc. 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[4],[5],[7] 0.02%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[4],[5],[7] $ 858  
Investment, Identifier [Axis]: Java Buyer, Inc., Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 1,897 1,897
Fair Value 0 $ 0
Investment, Identifier [Axis]: Jayhawk Buyer, LLC    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[8],[11],[13]   3.70%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[8],[11],[13] $ 153,720  
Ending balance [3],[8],[11],[13]   $ 153,720
Investment, Identifier [Axis]: Jayhawk Buyer, LLC 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[4],[7],[14] 3.38%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[4],[7],[14] $ 141,589  
Investment, Identifier [Axis]: Jayhawk Buyer, LLC 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.28% [1],[7],[14] 0.12% [3],[11],[13]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[11],[13] $ 5,144  
Ending balance $ 11,737 [1],[7],[14] $ 5,144 [3],[11],[13]
Investment, Identifier [Axis]: Jayhawk Buyer, LLC 3    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[7],[14] 0.12%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[7],[14] $ 5,144  
Investment, Identifier [Axis]: Jayhawk Buyer, LLC, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 30 30
Fair Value $ 0 $ 0
Investment, Identifier [Axis]: Jayhawk Holdings, LP - A-1 Common Units    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.01% [1],[7] 0.02% [2],[3],[11]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [2],[3],[11] $ 627  
Ending balance $ 627 [1],[7] $ 627 [2],[3],[11]
Investment, Identifier [Axis]: Jayhawk Holdings, LP - A-2 Common Units    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.01% [1],[7] 0.01% [2],[3],[11]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [2],[3],[11] $ 338  
Ending balance 338 [1],[7] $ 338 [2],[3],[11]
Investment, Identifier [Axis]: Jones Deslauriers Insurance Management, Inc.    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [2],[3],[9],[10]   1.44%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [2],[3],[9],[10] $ 59,917  
Ending balance [2],[3],[9],[10]   $ 59,917
Investment, Identifier [Axis]: Jones Deslauriers Insurance Management, Inc. 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[5],[6],[12] 0.13%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[5],[6],[12] $ 5,550  
Investment, Identifier [Axis]: Jones Deslauriers Insurance Management, Inc. 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[5],[6],[12] 0.10%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[5],[6],[12] $ 4,040  
Investment, Identifier [Axis]: Jones Deslauriers Insurance Management, Inc. 3    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[6],[12],[16] 0.38%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[6],[12],[16] $ 15,887  
Investment, Identifier [Axis]: KKR Alberta Midstream Finance Inc.    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.96% [1],[5],[6],[7] 0.96% [3],[9],[10],[11]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[9],[10],[11] $ 40,002  
Ending balance 40,307 [1],[5],[6],[7] $ 40,002 [3],[9],[10],[11]
Investment, Identifier [Axis]: KPSKY Acquisition, Inc.    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[8],[9],[11]   0.51%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[8],[9],[11] $ 21,240  
Ending balance [3],[8],[9],[11]   $ 21,240
Investment, Identifier [Axis]: KPSKY Acquisition, Inc. 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[5],[7],[24] 0.46%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[5],[7],[24] $ 19,258  
Investment, Identifier [Axis]: KPSKY Acquisition, Inc. 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[4],[5],[7] 0.05%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[4],[5],[7] $ 2,100  
Investment, Identifier [Axis]: KPSKY Acquisition, Inc., Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 143 143
Fair Value $ 0 $ 0
Investment, Identifier [Axis]: Kaufman Hall & Associates, LLC    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.57% [1],[5],[7] 0.58% [3],[8],[9],[11]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[8],[9],[11] $ 24,131  
Ending balance $ 24,083 [1],[5],[7] $ 24,131 [3],[8],[9],[11]
Investment, Identifier [Axis]: Knowledge Pro Buyer, Inc.    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.15% [1],[4],[5],[7] 0.14% [3],[8],[9],[11]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[8],[9],[11] $ 5,858  
Ending balance 6,268 [1],[4],[5],[7] $ 5,858 [3],[8],[9],[11]
Investment, Identifier [Axis]: Knowledge Pro Buyer, Inc., Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 661 1,032
Fair Value 0 (8)
Investment, Identifier [Axis]: Knowledge Pro Buyer, Inc., Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 1,145 1,145
Fair Value $ 0 $ 0
Investment, Identifier [Axis]: L&S Mechanical Acquisition, LLC    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.27% [1],[5],[7],[12] 0.29% [2],[3],[9],[11]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [2],[3],[9],[11] $ 11,869  
Ending balance $ 11,336 [1],[5],[7],[12] $ 11,869 [2],[3],[9],[11]
Investment, Identifier [Axis]: LD Lower Holdings, Inc.    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 2.17% [1],[7],[14] 2.19% [3],[8],[11],[13]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[8],[11],[13] $ 91,072  
Ending balance $ 90,840 [1],[7],[14] $ 91,072 [3],[8],[11],[13]
Investment, Identifier [Axis]: LD Lower Holdings, Inc., Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments   15,684
Fair Value   $ 0
Investment, Identifier [Axis]: Legacy Intermediate, LLC    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.14% [1],[4],[5],[7],[12] 0.12% [2],[3],[8],[9]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [2],[3],[8],[9] $ 5,080  
Ending balance 5,715 [1],[4],[5],[7],[12] $ 5,080 [2],[3],[8],[9]
Investment, Identifier [Axis]: Legacy Intermediate, LLC, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 1,410 2,000
Fair Value 0 (20)
Investment, Identifier [Axis]: Legacy Intermediate, LLC, Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 958 958
Fair Value $ (10) $ (10)
Investment, Identifier [Axis]: Lightbox Intermediate, LP    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.05% [1],[7],[16] 0.05% [3],[11],[15]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[11],[15] $ 1,920  
Ending balance $ 1,916 [1],[7],[16] $ 1,920 [3],[11],[15]
Investment, Identifier [Axis]: Lindstrom, LLC    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 2.88% [1],[7],[14] 2.90% [3],[11],[13]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[11],[13] $ 120,758  
Ending balance $ 120,512 [1],[7],[14] $ 120,758 [3],[11],[13]
Investment, Identifier [Axis]: Linquest Corp.    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.22% [1],[5],[7],[12] 0.23% [2],[3],[8],[9],[11]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [2],[3],[8],[9],[11] $ 9,395  
Ending balance $ 9,420 [1],[5],[7],[12] $ 9,395 [2],[3],[8],[9],[11]
Investment, Identifier [Axis]: Linquest Corp., Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments   4,975
Fair Value   $ (50)
Investment, Identifier [Axis]: Livingston International, Inc.    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 3.04% [1],[5],[6],[7] 3.07% [3],[9],[10],[11]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[9],[10],[11] $ 127,563  
Ending balance $ 127,239 [1],[5],[6],[7] $ 127,563 [3],[9],[10],[11]
Investment, Identifier [Axis]: Lobos Parent, Inc. - Series A Preferred Shares    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.04% [1],[7] 0.04% [2],[3],[11]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [2],[3],[11] $ 1,641  
Ending balance $ 1,672 [1],[7] $ 1,641 [2],[3],[11]
Investment, Identifier [Axis]: Lytx, Inc.    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 2.00% [1],[7],[14] 1.95% [3],[11],[13]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[11],[13] $ 81,076  
Ending balance $ 83,820 [1],[7],[14] $ 81,076 [3],[11],[13]
Investment, Identifier [Axis]: MAG DS Corp.    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 1.78% [1],[14] 1.80% [3],[11],[13]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[11],[13] $ 74,813  
Ending balance $ 74,611 [1],[14] $ 74,813 [3],[11],[13]
Investment, Identifier [Axis]: MHE Intermediate Holdings 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.01% [1],[4],[7],[12],[14] 0.10% [2],[3],[8],[11],[13]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [2],[3],[8],[11],[13] $ 4,331  
Ending balance $ 445 [1],[4],[7],[12],[14] $ 4,331 [2],[3],[8],[11],[13]
Investment, Identifier [Axis]: MHE Intermediate Holdings 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.01% [1],[7],[12],[14] 0.01% [2],[3],[11],[13]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [2],[3],[11],[13] $ 208  
Ending balance $ 383 [1],[7],[12],[14] $ 208 [2],[3],[11],[13]
Investment, Identifier [Axis]: MHE Intermediate Holdings 3    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[7],[12],[14] 0.08%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[7],[12],[14] $ 3,321  
Investment, Identifier [Axis]: MHE Intermediate Holdings, LLC, Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments   230
Fair Value   $ 0
Investment, Identifier [Axis]: MHE Intermediate Holdings, Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 230  
Fair Value $ 0  
Investment, Identifier [Axis]: MRI Software, LLC    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.62% [1],[4],[12],[14] 0.63% [2],[3],[8],[13]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [2],[3],[8],[13] $ 26,405  
Ending balance 26,178 [1],[4],[12],[14] $ 26,405 [2],[3],[8],[13]
Investment, Identifier [Axis]: MRI Software, LLC, Revolver 1    
Schedule of Investments [Line Items]    
Unfunded commitments 1,516 1,516
Fair Value (61) (55)
Investment, Identifier [Axis]: MRI Software, LLC, Revolver 2    
Schedule of Investments [Line Items]    
Unfunded commitments 4,200 4,200
Fair Value $ (397) $ (347)
Investment, Identifier [Axis]: Magnesium BorrowerCo, Inc. 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.10% [1],[5],[7] 0.10% [3],[9],[11]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[9],[11] $ 4,079  
Ending balance $ 4,183 [1],[5],[7] $ 4,079 [3],[9],[11]
Investment, Identifier [Axis]: Magnesium BorrowerCo, Inc. 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.12% [1],[4],[5],[7] 0.12% [3],[8],[9],[11]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[8],[9],[11] $ 5,177  
Ending balance 5,164 [1],[4],[5],[7] $ 5,177 [3],[8],[9],[11]
Investment, Identifier [Axis]: Magnesium BorrowerCo, Inc., Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 485 485
Fair Value $ (12) $ (12)
Investment, Identifier [Axis]: Mandolin Technology Holdings, Inc. - Series A Preferred Shares    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.08% [1],[7] 0.08% [2],[3],[11]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [2],[3],[11] $ 3,408  
Ending balance 3,337 [1],[7] $ 3,408 [2],[3],[11]
Investment, Identifier [Axis]: Mandolin Technology Intermediate Holdings, Inc.    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [2],[3],[8],[11],[18]   0.22%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [2],[3],[8],[11],[18] $ 9,120  
Ending balance [2],[3],[8],[11],[18]   $ 9,120
Investment, Identifier [Axis]: Mandolin Technology Intermediate Holdings, Inc. 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[7],[12],[17] 0.19%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[7],[12],[17] $ 8,162  
Investment, Identifier [Axis]: Mandolin Technology Intermediate Holdings, Inc. 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.03% [1],[7],[12],[16] 0.08% [2],[3],[11],[18]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [2],[3],[11],[18] $ 3,426  
Ending balance $ 1,140 [1],[7],[12],[16] $ 3,426 [2],[3],[11],[18]
Investment, Identifier [Axis]: Mandolin Technology Intermediate Holdings, Inc. 3    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[7],[12],[17] 0.08%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[7],[12],[17] $ 3,374  
Investment, Identifier [Axis]: Mandolin Technology Intermediate Holdings, Inc., Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments   349
Fair Value   $ 0
Investment, Identifier [Axis]: Marcone Yellowstone Buyer, Inc. 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.11% [1],[5],[7],[12] 0.04% [2],[3],[8],[9],[11]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [2],[3],[8],[9],[11] $ 1,524  
Ending balance $ 4,740 [1],[5],[7],[12] $ 1,524 [2],[3],[8],[9],[11]
Investment, Identifier [Axis]: Marcone Yellowstone Buyer, Inc. 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.04% [1],[5],[7],[12] 0.11% [2],[3],[9],[11]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [2],[3],[9],[11] $ 4,752  
Ending balance $ 1,542 [1],[5],[7],[12] $ 4,752 [2],[3],[9],[11]
Investment, Identifier [Axis]: Marcone Yellowstone Buyer, Inc. 3    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.04% [1],[4],[5],[7],[12] 0.04% [2],[3],[9],[11]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [2],[3],[9],[11] $ 1,534  
Ending balance 1,521 [1],[4],[5],[7],[12] $ 1,534 [2],[3],[9],[11]
Investment, Identifier [Axis]: Marcone Yellowstone Buyer, Inc., Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 342 342
Fair Value 0 $ 0
Investment, Identifier [Axis]: Material Holdings, LLC    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [2],[3],[8],[9]   0.57%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [2],[3],[8],[9] $ 23,687  
Ending balance [2],[3],[8],[9]   $ 23,687
Investment, Identifier [Axis]: Material Holdings, LLC 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[5],[7],[12] 0.54%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[5],[7],[12] $ 22,834  
Investment, Identifier [Axis]: Material Holdings, LLC 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[4],[5],[7],[12] 0.04%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[4],[5],[7],[12] $ 1,501  
Investment, Identifier [Axis]: Material Holdings, LLC, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 1,802 1,802
Fair Value 0 0
Investment, Identifier [Axis]: Material Holdings, LLC, Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 212 918
Fair Value $ 0 $ 0
Investment, Identifier [Axis]: Maverick Acquisition, Inc.    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.38% [1],[7],[14] 0.41% [3],[11],[13]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[11],[13] $ 17,004  
Ending balance $ 15,836 [1],[7],[14] $ 17,004 [3],[11],[13]
Investment, Identifier [Axis]: Medallia, Inc.    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 8.32% [1],[5],[7] 8.26% [3],[9],[11]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[9],[11] $ 343,665  
Ending balance $ 348,477 [1],[5],[7] $ 343,665 [3],[9],[11]
Investment, Identifier [Axis]: Micross Topco, Inc.    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.14% [1],[7] 0.11% [2],[3],[11]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [2],[3],[11] $ 4,767  
Ending balance $ 5,973 [1],[7] $ 4,767 [2],[3],[11]
Investment, Identifier [Axis]: Mimecast Limited    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.02% [1],[7] 0.02% [2],[3],[11]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [2],[3],[11] $ 638  
Ending balance $ 638 [1],[7] $ 638 [2],[3],[11]
Investment, Identifier [Axis]: Minotaur Acquisition, Inc.    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.05% [1],[16] 0.05% [3],[15]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[15] $ 1,903  
Ending balance $ 1,929 [1],[16] $ 1,903 [3],[15]
Investment, Identifier [Axis]: Mode Holdings, L.P. - Class A-2 Common Units    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.28% [1],[7] 0.26% [2],[3],[11]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [2],[3],[11] $ 10,699  
Ending balance $ 11,577 [1],[7] $ 10,699 [2],[3],[11]
Investment, Identifier [Axis]: Mode Purchaser, Inc. 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 4.13% [1],[7],[14] 4.17% [3],[11],[13]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[11],[13] $ 173,421  
Ending balance $ 172,975 [1],[7],[14] $ 173,421 [3],[11],[13]
Investment, Identifier [Axis]: Mode Purchaser, Inc. 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.12% [1],[7],[14] 0.12% [3],[11],[13]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[11],[13] $ 4,950  
Ending balance 4,938 [1],[7],[14] $ 4,950 [3],[11],[13]
Investment, Identifier [Axis]: Monk Holding Co.    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[8],[9],[11]   0.12%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[8],[9],[11] $ 4,929  
Ending balance [3],[8],[9],[11]   $ 4,929
Investment, Identifier [Axis]: Monk Holding Co. 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[5],[7] 0.11%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[5],[7] $ 4,756  
Investment, Identifier [Axis]: Monk Holding Co. 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[4],[5],[7] 0.00%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[4],[5],[7] $ 161  
Investment, Identifier [Axis]: Monk Holding Co., Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 2,038 2,038
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],[6],[7],[16] 0.02% [3],[8],[10],[11],[15]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[8],[10],[11],[15] $ 704  
Ending balance $ 197 [1],[6],[7],[16] $ 704 [3],[8],[10],[11],[15]
Investment, Identifier [Axis]: Monterey Financing S.à.r.l 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.02% [1],[6],[7],[16] 0.02% [3],[10],[11],[15]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[10],[11],[15] $ 674  
Ending balance $ 685 [1],[6],[7],[16] $ 674 [3],[10],[11],[15]
Investment, Identifier [Axis]: Monterey Financing S.à.r.l 3    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.02% [1],[4],[6],[7],[16] 0.01% [3],[10],[11],[18]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[10],[11],[18] $ 510  
Ending balance $ 653 [1],[4],[6],[7],[16] $ 510 [3],[10],[11],[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],[6],[7],[17] 0.00% [3],[10],[11],[15]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[10],[11],[15] $ 196  
Ending balance 479 [1],[6],[7],[17] $ 196 [3],[10],[11],[15]
Investment, Identifier [Axis]: Monterey Financing S.à.r.l, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 539 467
Fair Value $ (44) $ 0
Investment, Identifier [Axis]: NC Ocala Co-Invest Beta, L.P. - LP Interest    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.07% [1],[7] 0.07% [2],[3],[11]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [2],[3],[11] $ 2,854  
Ending balance 3,055 [1],[7] $ 2,854 [2],[3],[11]
Investment, Identifier [Axis]: NDC Acquisition Corp.    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[8],[11],[13]   0.33%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[8],[11],[13] $ 13,735  
Ending balance [3],[8],[11],[13]   $ 13,735
Investment, Identifier [Axis]: NDC Acquisition Corp. 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[4],[7],[14] 0.01%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[4],[7],[14] $ 445  
Investment, Identifier [Axis]: NDC Acquisition Corp. 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[7],[14] 0.32%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[7],[14] $ 13,256  
Investment, Identifier [Axis]: NDC Acquisition Corp., Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 2,911 2,911
Fair Value 0 $ 0
Investment, Identifier [Axis]: NMC Crimson Holdings, Inc.    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[8],[9],[11]   1.80%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[8],[9],[11] $ 74,829  
Ending balance [3],[8],[9],[11]   $ 74,829
Investment, Identifier [Axis]: NMC Crimson Holdings, Inc. 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[5],[7] 1.68%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[5],[7] $ 70,462  
Investment, Identifier [Axis]: NMC Crimson Holdings, Inc. 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[4],[5],[7] 0.11%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[4],[5],[7] $ 4,578  
Investment, Identifier [Axis]: NMC Crimson Holdings, Inc., Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 12,560 26,585
Fair Value 0 $ 0
Investment, Identifier [Axis]: Navigator Acquiror, Inc.    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[8],[11],[18]   4.78%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[8],[11],[18] $ 198,728  
Ending balance [3],[8],[11],[18]   $ 198,728
Investment, Identifier [Axis]: Navigator Acquiror, Inc. 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[7],[17] 4.43%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[7],[17] $ 185,783  
Investment, Identifier [Axis]: Navigator Acquiror, Inc. 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[4],[7],[17] 0.60%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[4],[7],[17] $ 24,974  
Investment, Identifier [Axis]: Navigator Acquiror, Inc., Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 40,639 49,175
Fair Value $ 0 $ 0
Investment, Identifier [Axis]: Ncp Helix Holdings, LLC. - Preferred Shares    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.01% [1],[7] 0.01% [2],[3],[11]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [2],[3],[11] $ 472  
Ending balance $ 472 [1],[7] $ 472 [2],[3],[11]
Investment, Identifier [Axis]: Nintex Topco Limited    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.76% [1],[5],[6],[7] 0.77% [3],[9],[10],[11]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[9],[10],[11] $ 31,987  
Ending balance $ 31,906 [1],[5],[6],[7] $ 31,987 [3],[9],[10],[11]
Investment, Identifier [Axis]: OHCP V TC COI, LP. - LP Interest    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.11% [1],[7] 0.11% [2],[3],[11]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [2],[3],[11] $ 4,410  
Ending balance 4,550 [1],[7] $ 4,410 [2],[3],[11]
Investment, Identifier [Axis]: Odyssey Holding Company, LLC    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[11],[13]   0.45%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[11],[13] $ 18,672  
Ending balance [3],[11],[13]   $ 18,672
Investment, Identifier [Axis]: Odyssey Holding Company, LLC 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[7],[14] 0.09%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[7],[14] $ 3,634  
Investment, Identifier [Axis]: Odyssey Holding Company, LLC 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[7],[14] 0.32%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[7],[14] $ 13,403  
Investment, Identifier [Axis]: Odyssey Holding Company, LLC 3    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[7],[14] 0.04%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[7],[14] $ 1,635  
Investment, Identifier [Axis]: Onex Baltimore Buyer, Inc.    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [2],[3],[8],[9],[11],[27]   0.67%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [2],[3],[8],[9],[11],[27] $ 27,720  
Ending balance [2],[3],[8],[9],[11],[27]   $ 27,720
Investment, Identifier [Axis]: Onex Baltimore Buyer, Inc. 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[5],[7],[24] 0.49%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[5],[7],[24] $ 20,595  
Investment, Identifier [Axis]: Onex Baltimore Buyer, Inc. 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[4],[5],[7] 0.17%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[4],[5],[7] $ 7,107  
Investment, Identifier [Axis]: Onex Baltimore Buyer, Inc., Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 2,247 2,247
Fair Value $ 0 $ 0
Investment, Identifier [Axis]: Oranje Holdco Inc    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[4],[7],[14] 0.05%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[4],[7],[14] $ 1,944  
Investment, Identifier [Axis]: Oranje Holdco Inc, Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 250  
Fair Value $ (6)  
Investment, Identifier [Axis]: Other Cash and Cash Equivalents    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 2.45% [1] 3.16% [2],[3]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [2],[3] $ 131,272  
Ending balance $ 102,473 [1] $ 131,272 [2],[3]
Investment, Identifier [Axis]: PGIS Intermediate Holdings, LLC    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.11% [1],[4],[5],[7],[12] 0.11% [2],[3],[8],[9],[11]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [2],[3],[8],[9],[11] $ 4,470  
Ending balance 4,459 [1],[4],[5],[7],[12] $ 4,470 [2],[3],[8],[9],[11]
Investment, Identifier [Axis]: PGIS Intermediate Holdings, LLC, Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 330 330
Fair Value $ (7) $ (7)
Investment, Identifier [Axis]: PPV Intermediate Holdings, LLC    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.04% [1],[4],[5],[7] 0.04% [3],[8],[9],[11]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[8],[9],[11] $ 1,775  
Ending balance 1,885 [1],[4],[5],[7] $ 1,775 [3],[8],[9],[11]
Investment, Identifier [Axis]: PPV Intermediate Holdings, LLC, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 17 170
Fair Value 0 0
Investment, Identifier [Axis]: PPV Intermediate Holdings, LLC, Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 159 116
Fair Value $ (2) $ 0
Investment, Identifier [Axis]: Petrus Buyer Inc    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.04% [1],[4],[5],[7] 0.04% [3],[8],[9],[11]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[8],[9],[11] $ 1,831  
Ending balance 1,852 [1],[4],[5],[7] $ 1,831 [3],[8],[9],[11]
Investment, Identifier [Axis]: Petrus Buyer Inc, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 595 595
Fair Value (9) (9)
Investment, Identifier [Axis]: Petrus Buyer Inc, Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 272 272
Fair Value (5) $ (8)
Investment, Identifier [Axis]: Point Broadband Acquisition, LLC    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[8],[11],[13]   2.44%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[8],[11],[13] $ 101,470  
Ending balance [3],[8],[11],[13]   $ 101,470
Investment, Identifier [Axis]: Point Broadband Acquisition, LLC 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[7],[14] 2.02%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[7],[14] $ 84,848  
Investment, Identifier [Axis]: Point Broadband Acquisition, LLC 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[4],[7],[14] 0.81%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[4],[7],[14] $ 33,947  
Investment, Identifier [Axis]: Point Broadband Acquisition, LLC, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 4,717 20,703
Fair Value $ 0 $ 0
Investment, Identifier [Axis]: Point Broadband Holdings, LLC - Class A Units    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.16% [1],[7] 0.13% [2],[3],[11]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [2],[3],[11] $ 5,285  
Ending balance $ 6,692 [1],[7] $ 5,285 [2],[3],[11]
Investment, Identifier [Axis]: Point Broadband Holdings, LLC - Class Additional A Units    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.03% [1],[7] 0.00% [2],[3],[11]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [2],[3],[11] $ 164  
Ending balance $ 1,438 [1],[7] $ 164 [2],[3],[11]
Investment, Identifier [Axis]: Point Broadband Holdings, LLC - Class Additional B Units    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.01% [1],[7] 0.03% [2],[3],[11]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [2],[3],[11] $ 1,136  
Ending balance $ 417 [1],[7] $ 1,136 [2],[3],[11]
Investment, Identifier [Axis]: Point Broadband Holdings, LLC - Class B Units    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.05% [1],[7] 0.02% [2],[3],[11]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [2],[3],[11] $ 762  
Ending balance $ 1,940 [1],[7] $ 762 [2],[3],[11]
Investment, Identifier [Axis]: Porcelain Acquisition Corp.    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 1.29% [1],[4],[7],[14] 1.32% [3],[8],[11],[13]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[8],[11],[13] $ 54,829  
Ending balance 54,156 [1],[4],[7],[14] $ 54,829 [3],[8],[11],[13]
Investment, Identifier [Axis]: Porcelain Acquisition Corp., Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 14,481 14,481
Fair Value $ 0 $ 0
Investment, Identifier [Axis]: Profile Products, LLC 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.14% [1],[5],[7] 0.15% [3],[8],[9],[11]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[8],[9],[11] $ 6,186  
Ending balance $ 5,740 [1],[5],[7] $ 6,186 [3],[8],[9],[11]
Investment, Identifier [Axis]: Profile Products, LLC 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.02% [1],[4],[5],[7] 0.03% [3],[9],[11]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[9],[11] $ 1,214  
Ending balance $ 729 [1],[4],[5],[7] $ 1,214 [3],[9],[11]
Investment, Identifier [Axis]: Profile Products, LLC 3    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[5],[7] 0.03%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[5],[7] $ 1,211  
Investment, Identifier [Axis]: Profile Products, LLC, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments   413
Fair Value   (9)
Investment, Identifier [Axis]: Profile Products, LLC, Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 145 237
Fair Value $ 0 $ 0
Investment, Identifier [Axis]: Progress Residential PM Holdings, LLC 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 1.68% [1],[4],[5],[7] 1.69% [3],[8],[9],[11]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[8],[9],[11] $ 70,324  
Ending balance $ 70,324 [1],[4],[5],[7] $ 70,324 [3],[8],[9],[11]
Investment, Identifier [Axis]: Progress Residential PM Holdings, LLC 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.02% [1],[4],[5],[7] 0.02% [3],[8],[9],[11]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[8],[9],[11] $ 833  
Ending balance 833 [1],[4],[5],[7] $ 833 [3],[8],[9],[11]
Investment, Identifier [Axis]: Progress Residential PM Holdings, LLC, Delayed Draw Term Loan 1    
Schedule of Investments [Line Items]    
Unfunded commitments 16,623 16,623
Fair Value 0 0
Investment, Identifier [Axis]: Progress Residential PM Holdings, LLC, Delayed Draw Term Loan 2    
Schedule of Investments [Line Items]    
Unfunded commitments 333 333
Fair Value 0 $ 0
Investment, Identifier [Axis]: Project Boost Purchaser, LLC    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[8],[9],[11]   0.11%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[8],[9],[11] $ 4,763  
Ending balance [3],[8],[9],[11]   $ 4,763
Investment, Identifier [Axis]: Project Boost Purchaser, LLC 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[4],[5],[7] 0.11%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[4],[5],[7] $ 4,682  
Investment, Identifier [Axis]: Project Boost Purchaser, LLC 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[4],[5],[7] 0.00%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[4],[5],[7] $ 69  
Investment, Identifier [Axis]: Project Boost Purchaser, LLC, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 905 905
Fair Value 0 0
Investment, Identifier [Axis]: Project Boost Purchaser, LLC, Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 591 591
Fair Value $ (3) $ (3)
Investment, Identifier [Axis]: Project Ruby Ultimate Parent Corp.    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.19% [1],[5] 0.19% [3],[9]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[9] $ 8,019  
Ending balance $ 8,143 [1],[5] $ 8,019 [3],[9]
Investment, Identifier [Axis]: Qualus Power Services Corp.    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.79% [1],[4],[7],[14] 0.80% [3],[8],[11],[13]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[8],[11],[13] $ 33,092  
Ending balance 32,975 [1],[4],[7],[14] $ 33,092 [3],[8],[11],[13]
Investment, Identifier [Axis]: Qualus Power Services Corp., Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 4,259 4,259
Fair Value $ 0 $ 0
Investment, Identifier [Axis]: RPBLS Midco, LLC    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.22% [1],[5],[7] 0.22% [3],[8],[9],[11]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[8],[9],[11] $ 9,329  
Ending balance $ 9,419 [1],[5],[7] $ 9,329 [3],[8],[9],[11]
Investment, Identifier [Axis]: RPBLS Midco, LLC, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments   20
Fair Value   $ 0
Investment, Identifier [Axis]: RWL Holdings, LLC    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.57% [1],[4],[5],[7] 0.57% [3],[8],[9],[11]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[8],[9],[11] $ 23,827  
Ending balance 23,767 [1],[4],[5],[7] $ 23,827 [3],[8],[9],[11]
Investment, Identifier [Axis]: RWL Holdings, LLC, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 6,452 6,452
Fair Value (65) $ (65)
Investment, Identifier [Axis]: Rally Buyer, Inc.    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[8],[9],[11]   0.02%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[8],[9],[11] $ 699  
Ending balance [3],[8],[9],[11]   $ 699
Investment, Identifier [Axis]: Rally Buyer, Inc. 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[4],[5],[7] 0.02%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[4],[5],[7] $ 699  
Investment, Identifier [Axis]: Rally Buyer, Inc. 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[4],[5],[7] 0.00%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[4],[5],[7] $ 22  
Investment, Identifier [Axis]: Rally Buyer, Inc., Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 180 205
Fair Value 0 (2)
Investment, Identifier [Axis]: Rally Buyer, Inc., Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 110 110
Fair Value $ (2) $ (2)
Investment, Identifier [Axis]: Razor Holdco, LLC    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.88% [1],[5],[7] 0.88% [3],[9],[11]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[9],[11] $ 36,600  
Ending balance $ 36,694 [1],[5],[7] $ 36,600 [3],[9],[11]
Investment, Identifier [Axis]: Red River Technology, LLC    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 1.92% [1],[4],[7],[14] 1.93% [3],[8],[11],[13]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[8],[11],[13] $ 80,180  
Ending balance 80,581 [1],[4],[7],[14] $ 80,180 [3],[8],[11],[13]
Investment, Identifier [Axis]: Red River Technology, LLC, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 25,880 25,880
Fair Value $ 0 $ 0
Investment, Identifier [Axis]: Redwood Services Group, LLC    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.06% [1],[4],[5],[7] 0.06% [3],[8],[9],[11]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[8],[9],[11] $ 2,290  
Ending balance 2,501 [1],[4],[5],[7] $ 2,290 [3],[8],[9],[11]
Investment, Identifier [Axis]: Redwood Services Group, LLC, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments   133
Fair Value   $ 0
Investment, Identifier [Axis]: Redwood Services Group, LLC, Delayed Draw Term Loan 1    
Schedule of Investments [Line Items]    
Unfunded commitments 2  
Fair Value 0  
Investment, Identifier [Axis]: Redwood Services Group, LLC, Delayed Draw Term Loan 2    
Schedule of Investments [Line Items]    
Unfunded commitments 903  
Fair Value $ 0  
Investment, Identifier [Axis]: Relativity ODA, LLC    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.50% [1],[4],[7],[14] 0.50% [3],[8],[11],[13]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[8],[11],[13] $ 20,631  
Ending balance 20,847 [1],[4],[7],[14] $ 20,631 [3],[8],[11],[13]
Investment, Identifier [Axis]: Relativity ODA, LLC, Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 3,292 3,292
Fair Value $ (49) $ (49)
Investment, Identifier [Axis]: Relay Purchaser, LLC    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.82% [1],[4],[5],[7],[12] 0.88% [2],[3],[8],[9],[11]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [2],[3],[8],[9],[11] $ 36,415  
Ending balance 34,478 [1],[4],[5],[7],[12] $ 36,415 [2],[3],[8],[9],[11]
Investment, Identifier [Axis]: Relay Purchaser, LLC, Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 7,143 7,143
Fair Value $ (71) $ (71)
Investment, Identifier [Axis]: RoadOne Inc    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.03% [1],[4],[7],[14] 0.02% [3],[8],[11],[13]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[8],[11],[13] $ 1,024  
Ending balance 1,099 [1],[4],[7],[14] $ 1,024 [3],[8],[11],[13]
Investment, Identifier [Axis]: RoadOne Inc, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 177 255
Fair Value 0 (4)
Investment, Identifier [Axis]: RoadOne Inc, Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 226 226
Fair Value 0 $ 0
Investment, Identifier [Axis]: Roadsafe Holdings, Inc.    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[8],[11],[13]   1.23%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[8],[11],[13] $ 51,336  
Ending balance [3],[8],[11],[13]   $ 51,336
Investment, Identifier [Axis]: Roadsafe Holdings, Inc. 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[4],[7],[14] 0.78%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[4],[7],[14] $ 32,692  
Investment, Identifier [Axis]: Roadsafe Holdings, Inc. 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[7],[14] 0.47%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[7],[14] $ 19,692  
Investment, Identifier [Axis]: Roadsafe Holdings, Inc., Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 1,460 2,900
Fair Value $ 0 $ 0
Investment, Identifier [Axis]: SEKO Global Logistics Network, LLC 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.14% [1],[7],[12],[14] 0.05% [2],[3],[10],[11],[13]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [2],[3],[10],[11],[13] $ 1,978  
Ending balance $ 5,951 [1],[7],[12],[14] $ 1,978 [2],[3],[10],[11],[13]
Investment, Identifier [Axis]: SEKO Global Logistics Network, LLC 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.00% [1],[4],[7],[12],[14] 0.15% [2],[3],[8],[11],[13]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [2],[3],[8],[11],[13] $ 6,214  
Ending balance $ 121 [1],[4],[7],[12],[14] $ 6,214 [2],[3],[8],[11],[13]
Investment, Identifier [Axis]: SEKO Global Logistics Network, LLC 3    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[6],[7],[12],[14] 0.05%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[6],[7],[12],[14] $ 2,009  
Investment, Identifier [Axis]: SEKO Global Logistics Network, LLC, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 318 399
Fair Value 0 0
Investment, Identifier [Axis]: SEKO Global Logistics Network, LLC, Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 485 294
Fair Value $ 0 $ 0
Investment, Identifier [Axis]: SG Acquisition, Inc.    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 2.51% [1],[7],[17] 2.52% [3],[11],[18]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[11],[18] $ 104,974  
Ending balance 104,974 [1],[7],[17] $ 104,974 [3],[11],[18]
Investment, Identifier [Axis]: Safety Borrower Holdings LP    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [2],[3],[8],[13]   0.12%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [2],[3],[8],[13] $ 5,028  
Ending balance [2],[3],[8],[13]   $ 5,028
Investment, Identifier [Axis]: Safety Borrower Holdings LP 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[7],[12],[14] 0.12%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[7],[12],[14] $ 5,045  
Investment, Identifier [Axis]: Safety Borrower Holdings LP 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[4],[7],[12],[14] 0.00%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[4],[7],[12],[14] $ 89  
Investment, Identifier [Axis]: Safety Borrower Holdings LP, Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 280 373
Fair Value 0 $ (4)
Investment, Identifier [Axis]: Sam Holding Co, Inc.    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[8],[11],[13]   0.99%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[8],[11],[13] $ 41,306  
Ending balance [3],[8],[11],[13]   $ 41,306
Investment, Identifier [Axis]: Sam Holding Co, Inc. 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[7],[14] 0.88%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[7],[14] $ 36,962  
Investment, Identifier [Axis]: Sam Holding Co, Inc. 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[4],[7],[14] 0.06%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[4],[7],[14] $ 2,505  
Investment, Identifier [Axis]: Sam Holding Co, Inc. 3    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[4],[7],[14] 0.09%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[4],[7],[14] $ 3,846  
Investment, Identifier [Axis]: Sam Holding Co, Inc., Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 29,700 29,731
Fair Value 0 0
Investment, Identifier [Axis]: Sam Holding Co, Inc., Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 3,420 5,500
Fair Value $ 0 $ 0
Investment, Identifier [Axis]: SelectQuote, Inc.    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 1.60% [1],[5],[7] 1.62% [3],[9],[11]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[9],[11] $ 67,243  
Ending balance $ 66,921 [1],[5],[7] $ 67,243 [3],[9],[11]
Investment, Identifier [Axis]: Shelf Bidco Ltd    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.12% [1],[5],[6],[7],[24] 0.12% [3],[9],[10]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[9],[10] $ 4,938  
Ending balance $ 4,939 [1],[5],[6],[7],[24] $ 4,938 [3],[9],[10]
Investment, Identifier [Axis]: Shelf Holdco Ltd Common Equity    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.00% [1],[6],[7] 0.00% [2],[3],[10],[11]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [2],[3],[10],[11] $ 50  
Ending balance $ 55 [1],[6],[7] $ 50 [2],[3],[10],[11]
Investment, Identifier [Axis]: Sherlock Buyer Corp.    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.20% [1],[4],[5],[7] 0.20% [3],[8],[9],[11]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[8],[9],[11] $ 8,223  
Ending balance 8,202 [1],[4],[5],[7] $ 8,223 [3],[8],[9],[11]
Investment, Identifier [Axis]: Sherlock Buyer Corp., Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 2,794 2,794
Fair Value (28) (28)
Investment, Identifier [Axis]: Sherlock Buyer Corp., Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 1,111 1,111
Fair Value $ (22) $ (22)
Investment, Identifier [Axis]: Shoals Holdings, LLC    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 2.00% [1],[7],[14] 2.02% [3],[11],[13]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[11],[13] $ 83,921  
Ending balance 83,706 [1],[7],[14] $ 83,921 [3],[11],[13]
Investment, Identifier [Axis]: Smile Doctors, LLC    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[8],[9],[11]   0.27%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[8],[9],[11] $ 11,218  
Ending balance [3],[8],[9],[11]   $ 11,218
Investment, Identifier [Axis]: Smile Doctors, LLC 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[5],[7] 0.26%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[5],[7] $ 10,694  
Investment, Identifier [Axis]: Smile Doctors, LLC 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[4],[5],[7] 0.03%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[4],[5],[7] $ 1,071  
Investment, Identifier [Axis]: Smile Doctors, LLC, Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 138 710
Fair Value $ 0 $ 0
Investment, Identifier [Axis]: Snoopy Bidco, Inc.    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 6.93% [1],[4],[5],[7] 7.05% [3],[8],[9],[11]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[8],[9],[11] $ 293,329  
Ending balance 290,287 [1],[4],[5],[7] $ 293,329 [3],[8],[9],[11]
Investment, Identifier [Axis]: Snoopy Bidco, Inc., Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 15,786 15,786
Fair Value $ 0 $ (237)
Investment, Identifier [Axis]: SpecialtyCare, Inc.    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.27% [1],[4],[7],[12],[14] 0.29% [2],[3],[8],[11],[13]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [2],[3],[8],[11],[13] $ 12,209  
Ending balance 11,393 [1],[4],[7],[12],[14] $ 12,209 [2],[3],[8],[11],[13]
Investment, Identifier [Axis]: SpecialtyCare, Inc., Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 1,155 1,155
Fair Value 0 0
Investment, Identifier [Axis]: SpecialtyCare, Inc., Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 1,012 614
Fair Value $ (22) $ 0
Investment, Identifier [Axis]: Spitfire Parent, Inc. 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 1.63% [1],[7],[14] 1.30% [3],[11],[13]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[11],[13] $ 53,960  
Ending balance $ 68,316 [1],[7],[14] $ 53,960 [3],[11],[13]
Investment, Identifier [Axis]: Spitfire Parent, Inc. 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.22% [1],[7],[14] 0.26% [2],[3],[11],[13]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [2],[3],[11],[13] $ 10,845  
Ending balance $ 9,323 [1],[7],[14] $ 10,845 [2],[3],[11],[13]
Investment, Identifier [Axis]: Spitfire Parent, Inc. 3    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.26% [1],[7],[12],[14] 0.48% [3],[8],[11],[13]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[8],[11],[13] $ 20,059  
Ending balance $ 10,984 [1],[7],[12],[14] $ 20,059 [3],[8],[11],[13]
Investment, Identifier [Axis]: Spitfire Parent, Inc., Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments   3,689
Fair Value   $ 0
Investment, Identifier [Axis]: Stamps.com, Inc.    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 6.69% [1],[5],[7] 6.75% [3],[9],[11]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[9],[11] $ 280,899  
Ending balance $ 280,191 [1],[5],[7] $ 280,899 [3],[9],[11]
Investment, Identifier [Axis]: State Street Institutional U.S. Government Money Market Fund    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1] 0.01%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1] $ 552  
Investment, Identifier [Axis]: Stepping Stones Healthcare Services, LLC    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[8],[9],[11]   0.06%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[8],[9],[11] $ 2,690  
Ending balance [3],[8],[9],[11]   $ 2,690
Investment, Identifier [Axis]: Stepping Stones Healthcare Services, LLC 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[4],[5],[7] 0.01%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[4],[5],[7] $ 416  
Investment, Identifier [Axis]: Stepping Stones Healthcare Services, LLC 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[4],[5],[7] 0.01%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[4],[5],[7] $ 226  
Investment, Identifier [Axis]: Stepping Stones Healthcare Services, LLC 3    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[5],[7] 0.05%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[5],[7] $ 2,101  
Investment, Identifier [Axis]: Stepping Stones Healthcare Services, LLC, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 314 441
Fair Value 0 0
Investment, Identifier [Axis]: Stepping Stones Healthcare Services, LLC, Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 134 74
Fair Value $ 0 $ 0
Investment, Identifier [Axis]: TCFI AEVEX, LLC    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 2.51% [1],[7],[14] 2.44% [3],[11],[13]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[11],[13] $ 101,373  
Ending balance $ 104,977 [1],[7],[14] $ 101,373 [3],[11],[13]
Investment, Identifier [Axis]: TRP Infrastructure Services, LLC    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.87% [1],[7],[14] 0.88% [3],[8],[11],[13]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[8],[11],[13] $ 36,464  
Ending balance 36,443 [1],[7],[14] $ 36,464 [3],[8],[11],[13]
Investment, Identifier [Axis]: TRP Infrastructure Services, LLC, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments   7,101
Fair Value   $ (71)
Investment, Identifier [Axis]: Tailwind Colony Holding Corporation    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[8],[11],[13]   1.01%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[8],[11],[13] $ 42,132  
Ending balance [3],[8],[11],[13]   $ 42,132
Investment, Identifier [Axis]: Tailwind Colony Holding Corporation 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[7],[14] 0.74%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[7],[14] $ 31,181  
Investment, Identifier [Axis]: Tailwind Colony Holding Corporation 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[7],[14] 0.02%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[7],[14] $ 960  
Investment, Identifier [Axis]: Tailwind Colony Holding Corporation 3    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[7],[14] 0.24%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[7],[14] $ 10,184  
Investment, Identifier [Axis]: Tennessee Bidco Limited 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.05% [1],[6],[7],[12],[16] 0.46% [2],[3],[10],[11],[15]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [2],[3],[10],[11],[15] $ 19,134  
Ending balance $ 1,934 [1],[6],[7],[12],[16] $ 19,134 [2],[3],[10],[11],[15]
Investment, Identifier [Axis]: Tennessee Bidco Limited 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.47% [1],[6],[7],[12],[16] 0.81% [2],[3],[10],[11],[15]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [2],[3],[10],[11],[15] $ 33,693  
Ending balance $ 19,667 [1],[6],[7],[12],[16] $ 33,693 [2],[3],[10],[11],[15]
Investment, Identifier [Axis]: Tennessee Bidco Limited 3    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.78% [1],[6],[7],[12],[16] 1.28% [2],[3],[10],[11],[15]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [2],[3],[10],[11],[15] $ 53,088  
Ending balance $ 32,788 [1],[6],[7],[12],[16] $ 53,088 [2],[3],[10],[11],[15]
Investment, Identifier [Axis]: Tennessee Bidco Limited 4    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 1.27% [1],[6],[7],[12],[16] 0.38% [2],[3],[10],[11],[15]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [2],[3],[10],[11],[15] $ 15,718  
Ending balance $ 53,088 [1],[6],[7],[12],[16] $ 15,718 [2],[3],[10],[11],[15]
Investment, Identifier [Axis]: Tennessee Bidco Limited 5    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[6],[7],[12],[16] 0.38%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[6],[7],[12],[16] $ 15,718  
Investment, Identifier [Axis]: Tetra Technologies, Inc.    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.42% [1],[6],[7],[14] 0.43% [3],[10],[11],[13]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[10],[11],[13] $ 17,790  
Ending balance $ 17,790 [1],[6],[7],[14] $ 17,790 [3],[10],[11],[13]
Investment, Identifier [Axis]: The Action Environmental Group, Inc.    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[7],[12],[28] 3.40%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[7],[12],[28] $ 142,648  
Investment, Identifier [Axis]: The Action Environmental Group, Inc. 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [2],[3],[11],[27]   3.17%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [2],[3],[11],[27] 132,022  
Ending balance [2],[3],[11],[27]   $ 132,022
Investment, Identifier [Axis]: The Action Environmental Group, Inc. 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [2],[3],[11],[27]   0.26%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [2],[3],[11],[27] $ 10,993  
Ending balance [2],[3],[11],[27]   $ 10,993
Investment, Identifier [Axis]: The Cook & Boardman Group, LLC    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 1.06% [1],[14] 1.01% [3],[13]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[13] $ 41,998  
Ending balance $ 44,236 [1],[14] $ 41,998 [3],[13]
Investment, Identifier [Axis]: The Fertility Partners, Inc. 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.01% [1],[4],[5],[6],[7],[12] 0.11% [2],[3],[9],[10],[11]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [2],[3],[9],[10],[11] $ 4,776  
Ending balance $ 213 [1],[4],[5],[6],[7],[12] $ 4,776 [2],[3],[9],[10],[11]
Investment, Identifier [Axis]: The Fertility Partners, Inc. 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.08% [1],[5],[6],[7],[12] 0.10% [2],[3],[8],[9],[10],[11]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [2],[3],[8],[9],[10],[11] $ 4,287  
Ending balance $ 3,518 [1],[5],[6],[7],[12] $ 4,287 [2],[3],[8],[9],[10],[11]
Investment, Identifier [Axis]: The Fertility Partners, Inc. 3    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[4],[5],[6],[7],[12] 0.01%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[4],[5],[6],[7],[12] $ 261  
Investment, Identifier [Axis]: The Fertility Partners, Inc. 4    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[5],[6],[7],[12] 0.11%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[5],[6],[7],[12] $ 4,764  
Investment, Identifier [Axis]: The Fertility Partners, Inc., Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 590 315
Fair Value 0 0
Investment, Identifier [Axis]: The Fertility Partners, Inc., Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 34 28
Fair Value 0 $ 0
Investment, Identifier [Axis]: The GI Alliance Management, LLC    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[8],[11],[13]   0.10%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[8],[11],[13] $ 3,998  
Ending balance [3],[8],[11],[13]   $ 3,998
Investment, Identifier [Axis]: The GI Alliance Management, LLC 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[7],[14] 0.10%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[7],[14] $ 4,056  
Investment, Identifier [Axis]: The GI Alliance Management, LLC 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[7],[14] 0.02%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[7],[14] $ 874  
Investment, Identifier [Axis]: The GI Alliance Management, LLC, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments   883
Fair Value   $ (26)
Investment, Identifier [Axis]: The NPD Group L.P. 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[8],[9],[11]   1.78%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[8],[9],[11] 74,210  
Ending balance [3],[8],[9],[11]   $ 74,210
Investment, Identifier [Axis]: The NPD Group L.P. 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[8],[9],[11]   2.93%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[8],[9],[11] $ 121,859  
Ending balance [3],[8],[9],[11]   $ 121,859
Investment, Identifier [Axis]: The NPD Group L.P., Revolver 1    
Schedule of Investments [Line Items]    
Unfunded commitments   7,729
Fair Value   0
Investment, Identifier [Axis]: The NPD Group L.P., Revolver 2    
Schedule of Investments [Line Items]    
Unfunded commitments   4,416
Fair Value   $ (44)
Investment, Identifier [Axis]: Thevelia US, LLC    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.03% [1],[6],[12],[17] 0.03% [2],[3],[10],[18]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [2],[3],[10],[18] $ 1,273  
Ending balance $ 1,274 [1],[6],[12],[17] $ 1,273 [2],[3],[10],[18]
Investment, Identifier [Axis]: Thevelia US, LLC 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.12% [1],[6],[7],[17] 0.12% [3],[10],[11],[18]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[10],[11],[18] $ 4,810  
Ending balance $ 4,846 [1],[6],[7],[17] $ 4,810 [3],[10],[11],[18]
Investment, Identifier [Axis]: Titan Investment Company, Inc.    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.96% [1],[7],[12],[16] 0.97% [2],[3],[11],[15]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [2],[3],[11],[15] $ 40,136  
Ending balance $ 40,033 [1],[7],[12],[16] $ 40,136 [2],[3],[11],[15]
Investment, Identifier [Axis]: Trader Corp.    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.16% [1],[4],[5],[6],[7] 0.17% [3],[8],[9],[10],[11]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[8],[9],[10],[11] $ 7,185  
Ending balance 6,768 [1],[4],[5],[6],[7] $ 7,185 [3],[8],[9],[10],[11]
Investment, Identifier [Axis]: Trader Corp., Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 1,047 620
Fair Value $ (436) $ (11)
Investment, Identifier [Axis]: Tricor Horizon, LP    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.01% [1],[6],[7] 0.01% [2],[3],[10],[11]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [2],[3],[10],[11] $ 382  
Ending balance 382 [1],[6],[7] $ 382 [2],[3],[10],[11]
Investment, Identifier [Axis]: Trinity Air Consultants Holdings Corp.    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[8],[9],[11]   1.61%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[8],[9],[11] $ 67,079  
Ending balance [3],[8],[9],[11]   $ 67,079
Investment, Identifier [Axis]: Trinity Air Consultants Holdings Corp. 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[4],[5],[7] 1.32%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[4],[5],[7] $ 55,202  
Investment, Identifier [Axis]: Trinity Air Consultants Holdings Corp. 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[4],[5],[7] 0.28%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[4],[5],[7] $ 11,877  
Investment, Identifier [Axis]: Trinity Air Consultants Holdings Corp., Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 10,916 10,916
Fair Value 0 0
Investment, Identifier [Axis]: Trinity Air Consultants Holdings Corp., Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 6,881 6,881
Fair Value $ (69) $ (69)
Investment, Identifier [Axis]: Trinity Partners Holdings, LLC    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.11% [1],[4],[5],[7] 0.11% [3],[8],[9],[11]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[8],[9],[11] $ 4,694  
Ending balance 4,682 [1],[4],[5],[7] $ 4,694 [3],[8],[9],[11]
Investment, Identifier [Axis]: Trinity Partners Holdings, LLC, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 1,433 1,433
Fair Value 0 $ (14)
Investment, Identifier [Axis]: Triple Lift, Inc.    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[8],[9],[11]   1.54%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[8],[9],[11] $ 63,876  
Ending balance [3],[8],[9],[11]   $ 63,876
Investment, Identifier [Axis]: Triple Lift, Inc. 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[5],[7] 1.13%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[5],[7] $ 47,179  
Investment, Identifier [Axis]: Triple Lift, Inc. 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[5],[7] 0.33%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[5],[7] $ 13,710  
Investment, Identifier [Axis]: Triple Lift, Inc. 3    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[4],[5],[7] 0.07%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[4],[5],[7] $ 2,797  
Investment, Identifier [Axis]: Triple Lift, Inc., Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 4,747 4,747
Fair Value $ 0 $ 0
Investment, Identifier [Axis]: Turing Holdco, Inc. 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.19% [1],[4],[6],[7],[12],[16] 0.41% [2],[3],[8],[10],[11],[15]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [2],[3],[8],[10],[11],[15] $ 17,160  
Ending balance $ 7,818 [1],[4],[6],[7],[12],[16] $ 17,160 [2],[3],[8],[10],[11],[15]
Investment, Identifier [Axis]: Turing Holdco, Inc. 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.20% [1],[6],[7],[12],[16] 0.20% [2],[3],[10],[11],[15]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [2],[3],[10],[11],[15] $ 8,310  
Ending balance $ 8,289 [1],[6],[7],[12],[16] $ 8,310 [2],[3],[10],[11],[15]
Investment, Identifier [Axis]: Turing Holdco, Inc. 3    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[6],[7],[12],[16] 0.28%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[6],[7],[12],[16] $ 11,614  
Investment, Identifier [Axis]: Turing Holdco, Inc., Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 1,424 3,239
Fair Value $ 0 $ 0
Investment, Identifier [Axis]: UMP Holdings, LLC 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[4],[5],[7] 0.03%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[4],[5],[7] $ 1,100  
Investment, Identifier [Axis]: UMP Holdings, LLC 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[5],[7] 0.03%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[5],[7] $ 1,065  
Investment, Identifier [Axis]: UMP Holdings, LLC, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 808  
Fair Value 0  
Investment, Identifier [Axis]: US Oral Surgery Management Holdco, LLC    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[8],[9],[11]   0.99%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[8],[9],[11] $ 41,169  
Ending balance [3],[8],[9],[11]   $ 41,169
Investment, Identifier [Axis]: US Oral Surgery Management Holdco, LLC 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[4],[5],[7] 0.72%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[4],[5],[7] $ 30,117  
Investment, Identifier [Axis]: US Oral Surgery Management Holdco, LLC 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[5],[7] 0.31%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[5],[7] $ 12,897  
Investment, Identifier [Axis]: US Oral Surgery Management Holdco, LLC, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments   3,666
Fair Value   0
Investment, Identifier [Axis]: US Oral Surgery Management Holdco, LLC, Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 3,233 3,233
Fair Value $ (154) $ (32)
Investment, Identifier [Axis]: Unified Door & Hardware Group, LLC 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 2.16% [1],[7],[14] 0.02% [3],[11],[13]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[11],[13] $ 953  
Ending balance $ 90,352 [1],[7],[14] $ 953 [3],[11],[13]
Investment, Identifier [Axis]: Unified Door & Hardware Group, LLC 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.02% [1],[7],[14] 1.23% [3],[11],[13]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[11],[13] $ 51,064  
Ending balance 955 [1],[7],[14] $ 51,064 [3],[11],[13]
Investment, Identifier [Axis]: Unified Door & Hardware Group, LLC 3    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[11],[13]   1.00%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[11],[13] $ 41,733  
Ending balance [3],[11],[13]   $ 41,733
Investment, Identifier [Axis]: Unified Physician Management, LLC    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.05% [1],[4],[7],[17] 0.05% [3],[8],[11],[18]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[8],[11],[18] $ 2,046  
Ending balance 2,084 [1],[4],[7],[17] $ 2,046 [3],[8],[11],[18]
Investment, Identifier [Axis]: Unified Physician Management, LLC, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 34 77
Fair Value 0 0
Investment, Identifier [Axis]: Unified Physician Management, LLC, Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 241 241
Fair Value 0 $ 0
Investment, Identifier [Axis]: United Mutual Acquisition Holdings, LLC    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [3],[8],[9],[11]   0.04%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[8],[9],[11] $ 1,738  
Ending balance [3],[8],[9],[11]   $ 1,738
Investment, Identifier [Axis]: United Mutual Acquisition Holdings, LLC, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments   1,275
Fair Value   $ 0
Investment, Identifier [Axis]: Veregy Consolidated, Inc.    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.43% [1],[14] 0.41% [3],[11],[13]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[11],[13] $ 17,126  
Ending balance $ 17,864 [1],[14] $ 17,126 [3],[11],[13]
Investment, Identifier [Axis]: Victory Buyer, LLC    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.20% [1],[7],[17] 0.20% [3],[11],[18]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[11],[18] $ 8,248  
Ending balance 8,248 [1],[7],[17] $ 8,248 [3],[11],[18]
Investment, Identifier [Axis]: WHCG Purchaser III, Inc.    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [2],[3],[8],[9],[11]   0.83%
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [2],[3],[8],[9],[11] $ 34,563  
Ending balance [2],[3],[8],[9],[11]   $ 34,563
Investment, Identifier [Axis]: WHCG Purchaser III, Inc. 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[4],[5],[7],[12] 0.12%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[4],[5],[7],[12] $ 4,950  
Investment, Identifier [Axis]: WHCG Purchaser III, Inc. 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets [1],[4],[5],[7],[12] 0.69%  
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Ending balance [1],[4],[5],[7],[12] $ 28,726  
Investment, Identifier [Axis]: WHCG Purchaser III, Inc., Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 10,490 10,490
Fair Value 0 0
Investment, Identifier [Axis]: WHCG Purchaser III, Inc., Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 42 4,454
Fair Value $ 0 $ 0
Investment, Identifier [Axis]: West Monroe Partners, LLC    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.35% [1],[4],[5],[7] 0.35% [3],[8],[9],[11]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[8],[9],[11] $ 14,524  
Ending balance 14,487 [1],[4],[5],[7] $ 14,524 [3],[8],[9],[11]
Investment, Identifier [Axis]: West Monroe Partners, LLC, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 3,848 3,848
Fair Value 0 0
Investment, Identifier [Axis]: West Monroe Partners, LLC, Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 1,443 1,443
Fair Value $ 0 $ 0
Investment, Identifier [Axis]: Westland Insurance Group LTD 1    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 1.01% [1],[6],[7],[12],[14] 0.99% [2],[3],[10],[11],[13]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [2],[3],[10],[11],[13] $ 41,209  
Ending balance $ 42,483 [1],[6],[7],[12],[14] $ 41,209 [2],[3],[10],[11],[13]
Investment, Identifier [Axis]: Westland Insurance Group LTD 2    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 2.92% [1],[4],[6],[7],[12],[14] 2.84% [2],[3],[8],[10],[11],[15]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [2],[3],[8],[10],[11],[15] $ 118,210  
Ending balance 122,351 [1],[4],[6],[7],[12],[14] $ 118,210 [2],[3],[8],[10],[11],[15]
Investment, Identifier [Axis]: Westland Insurance Group LTD, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 246 572
Fair Value $ 0 $ 0
Investment, Identifier [Axis]: Windows Acquisition Holdings, Inc.    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 1.19% [1],[7],[12],[14] 1.29% [2],[3],[11],[13]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [2],[3],[11],[13] $ 53,729  
Ending balance $ 49,997 [1],[7],[12],[14] $ 53,729 [2],[3],[11],[13]
Investment, Identifier [Axis]: Zendesk Inc    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.04% [1],[4],[5],[7] 0.04% [3],[8],[9],[11]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [3],[8],[9],[11] $ 1,542  
Ending balance 1,557 [1],[4],[5],[7] $ 1,542 [3],[8],[9],[11]
Investment, Identifier [Axis]: Zendesk Inc, Delayed Draw Term Loan    
Schedule of Investments [Line Items]    
Unfunded commitments 361 361
Fair Value (5) (5)
Investment, Identifier [Axis]: Zendesk Inc, Revolver    
Schedule of Investments [Line Items]    
Unfunded commitments 169 169
Fair Value $ (3) $ (3)
Investment, Identifier [Axis]: Zoro Common Equity    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.00% [1],[7] 0.00% [2],[3],[11]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [2],[3],[11] $ 21  
Ending balance $ 21 [1],[7] $ 21 [2],[3],[11]
Investment, Identifier [Axis]: Zoro Series A Preferred Shares    
Schedule of Investments [Line Items]    
Fair Value as % of Net Assets 0.01% [1],[7] 0.01% [2],[3],[11]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]    
Beginning balance [2],[3],[11] $ 362  
Ending balance $ 373 [1],[7] $ 362 [2],[3],[11]
[1] 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 Consolidated Schedule of Investments) are denominated in dollars. As of March 31, 2023, the Company had investments denominated in Canadian Dollars (CAD), Euros (EUR), British Pounds (GBP), Danish Krone (DKK), Swedish Krona (SEK), and Norwegian Krone (NOK). 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.
[2] These debt 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.
[3] 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 Consolidated Schedule of Investments) are denominated in dollars. As of December 31, 2022, the Company had investments denominated in Canadian Dollars (CAD), Euros (EUR), British Pounds (GBP), Danish Krone (DKK), Swedish Krona (SEK), and Norwegian Krone (NOK). 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.
[4] Position or portion thereof is an unfunded loan 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 loan 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:
[5] The interest rate floor on these investments as of March 31, 2023 was 0.75%
[6] The investment is not a qualifying asset under Section 55(a) of 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, 2023, non-qualifying assets represented 10.4% of total assets as calculated in accordance with regulatory requirements.
[7] 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.
[8] Position or portion thereof is an unfunded loan 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 loan 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:
[9] The interest rate floor on these investments as of December 31, 2022 was 0.75%
[10] The investment is not a qualifying asset under Section 55(a) of 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, 2022, non-qualifying assets represented 11.0% of total assets as calculated in accordance with regulatory requirements.
[11] 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 and Note 5), pursuant to the Company’s valuation policy.
[12] 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.
[13] The interest rate floor on these investments as of December 31, 2022 was 1.00%
[14] The interest rate floor on these investments as of March 31, 2023 was 1.00%
[15] There are no interest rate floors on these investments.
[16] There are no interest rate floors on these investments.
[17] The interest rate floor on these investments as of March 31, 2023 was 0.50%
[18] The interest rate floor on these investments as of December 31, 2022 was 0.50%
[19] The interest rate floor on these investments as of March 31, 2023 was 1.50%
[20] The interest rate floor on these investments as of December 31, 2022 was 1.50%
[21] Loan was on non-accrual status as of March 31, 2023.(18)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.
[22] Under the Investment Company Act of 1940, as amended (together with the rules and regulations promulgated thereunder, 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. As of March 31, 2023, the Company does not “control” any of these portfolio companies. 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, 2023, the Company’s non-controlled/affiliated investments were as follows:
Fair value as of December 31, 2022Gross AdditionsGross ReductionsChange in Unrealized Gains (Losses)Fair value as of March 31, 2023Dividend and Interest Income
Non-controlled/Affiliated Investments
Blackstone Donegal Holdings LP$56,584 $— $— $(4,641)$51,943 $— 
Total$56,584 $— $— $(4,641)$51,943 $— 
[23] Under the Investment Company Act of 1940, as amended (together with the rules and regulations promulgated thereunder, 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. As of December 31, 2022, the Company does not “control” any of these portfolio companies. 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, 2022, the Company’s non-controlled/affiliated investments were as follows:
[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] The interest rate floor on these investments as of December 31, 2022 was 2.00%
[26] The interest rate floor on these investments as of March 31, 2023 was 2.00%
[27] The interest rate floor on these investments as of December 31, 2022 was 1.25%
[28] The interest rate floor on these investments as of March 31, 2023 was 1.25%