v3.26.1
Fair Value of Financial Instruments - Schedule of SLF’s Portfolio (Details)
$ in Thousands
Jun. 30, 2026
USD ($)
portfolioCompany
Dec. 31, 2025
USD ($)
portfolioCompany
Dec. 31, 2024
USD ($)
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Total assets $ 4,170,384 $ 4,247,887  
Fair Value 4,079,384 [1],[2],[3] 4,071,008 [4],[5],[6]  
Investment, Identifier [Axis]: 1236904 BC, Ltd. | Software 1      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 581 [7],[8] 3,511 [9],[10]  
Investment, Identifier [Axis]: 1236904 BC, Ltd. | Software 2      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 4,436 [7],[8],[11] 4,588 [9],[10],[12]  
Investment, Identifier [Axis]: AAdvantage Loyalty IP, Ltd., Passenger Airlines      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 3,963 3,997  
Investment, Identifier [Axis]: ACE Solutions, LLC | Oil, Gas & Consumable Fuels 1      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value [8],[13] (45)    
Investment, Identifier [Axis]: ACE Solutions, LLC | Oil, Gas & Consumable Fuels 2      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value [8] 7,412    
Investment, Identifier [Axis]: ACE Solutions, LLC | Oil, Gas & Consumable Fuels 3      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value [7],[8] 10,373    
Investment, Identifier [Axis]: ADCS Clinics Intermediate Holdings, LLC | Health Care Providers & Services      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value [7],[8] 17,205    
Investment, Identifier [Axis]: ADCS Clinics Intermediate Holdings, LLC | Health Care Providers & Services 1      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 113 [8] 123 [10]  
Investment, Identifier [Axis]: ADCS Clinics Intermediate Holdings, LLC | Health Care Providers & Services 2      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 1,037 [8],[13] 243 [10],[14]  
Investment, Identifier [Axis]: ADCS Clinics Intermediate Holdings, LLC | Health Care Providers & Services 3      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 3,527 [7],[8] 3,825 [9],[10]  
Investment, Identifier [Axis]: ADCS Clinics Intermediate Holdings, LLC | Health Care Providers & Services 4      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value [9],[10]   18,658  
Investment, Identifier [Axis]: ADMI Corp., Health Care Providers & Services      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 2,602 2,669  
Investment, Identifier [Axis]: AIG CLO, Ltd. 21-1A F, Capital Markets      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 1,320 1,320  
Investment, Identifier [Axis]: ARC Falcon I, Inc., Chemicals      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value   4,955  
Investment, Identifier [Axis]: Accel International Holdings, LLC | Electrical Equipment 1      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 952 [8],[13] (21) [10],[14]  
Investment, Identifier [Axis]: Accel International Holdings, LLC | Electrical Equipment 2      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 27,685 [7],[8],[11] 27,560 [9],[10],[12]  
Investment, Identifier [Axis]: Acrisure, LLC, Insurance      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 4,622 5,154  
Investment, Identifier [Axis]: Adelaide Borrower, LLC | Software 1      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 0 [8],[13] 0 [10],[14]  
Investment, Identifier [Axis]: Adelaide Borrower, LLC | Software 2      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 399 [8],[13] 898 [10],[14]  
Investment, Identifier [Axis]: Adelaide Borrower, LLC | Software 3      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 35,895 [7],[8],[11] 35,895 [9],[10],[12]  
Investment, Identifier [Axis]: Adtalem Global Education, Inc., Diversified Consumer Services      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value   238  
Investment, Identifier [Axis]: Advanced Integration Technology, LP | Aerospace & Defense      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value [7],[8] 12,144    
Investment, Identifier [Axis]: Alera Group, Inc. | Insurance      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 21,063 [7],[11] 22,528 [9],[12]  
Investment, Identifier [Axis]: Alera Group, Inc., Insurance      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 7,325 7,794  
Investment, Identifier [Axis]: Allwyn Entertainment Financing US, LLC, Hotels, Restaurants & Leisure      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 6,886 6,860  
Investment, Identifier [Axis]: American Auto Auction Group, LLC, Commercial Services & Supplies      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 1,986    
Investment, Identifier [Axis]: American Rock Salt Company, LLC | Chemicals      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value [7],[8] 5,276    
Investment, Identifier [Axis]: American Rock Salt Company, LLC | Chemicals 1      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 1,791 [7] 1,516 [9]  
Investment, Identifier [Axis]: American Rock Salt Company, LLC | Chemicals 2      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value [9],[10]   4,855  
Investment, Identifier [Axis]: American Rock Salt Company, LLC, Chemicals      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 1,706 1,570  
Investment, Identifier [Axis]: Amylu Borrower Sub, LLC | Food Products 1      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 1,135 [8],[13] 0 [10],[14]  
Investment, Identifier [Axis]: Amylu Borrower Sub, LLC | Food Products 2      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 0 [8],[13] 0 [10],[14]  
Investment, Identifier [Axis]: Amylu Borrower Sub, LLC | Food Products 3      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 39,237 [7],[8] 39,436 [9],[10]  
Investment, Identifier [Axis]: Aprio Advisory Group, LLC | Financial Services 1      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 655 [8],[13] (112) [10],[14]  
Investment, Identifier [Axis]: Aprio Advisory Group, LLC | Financial Services 2      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value (8) [8],[13] (9) [10],[14]  
Investment, Identifier [Axis]: Arch Global Precision, LLC | Machinery 1      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 2,194 [8] 938 [10],[14]  
Investment, Identifier [Axis]: Arch Global Precision, LLC | Machinery 2      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 887 [8],[13] 2,241 [10]  
Investment, Identifier [Axis]: Arch Global Precision, LLC | Machinery 3      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 6,962 [7],[8],[11] 7,112 [9],[10],[12]  
Investment, Identifier [Axis]: Arches Buyer, Inc., Media      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 5,860 5,923  
Investment, Identifier [Axis]: Arcline FM Holdings, LLC, Aerospace & Defense      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 4,963 4,989  
Investment, Identifier [Axis]: Arctic Holdco, LLC | Trading Companies & Distributors 1      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 5,224 [8] 3,243 [10],[14]  
Investment, Identifier [Axis]: Arctic Holdco, LLC | Trading Companies & Distributors 2      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 984 [8],[13] 632 [10],[14]  
Investment, Identifier [Axis]: Arctic Holdco, LLC | Trading Companies & Distributors 3      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 45,690 [7],[8],[11] 45,922 [9],[10],[12]  
Investment, Identifier [Axis]: Armada Parent, Inc. | Aerospace & Defense 1      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 3,822 [8] 3,841 [10]  
Investment, Identifier [Axis]: Armada Parent, Inc. | Aerospace & Defense 2      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 0 [8],[13] 0 [10],[14]  
Investment, Identifier [Axis]: Armada Parent, Inc. | Aerospace & Defense 3      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 55,213 [7],[8] 55,492 [9],[10]  
Investment, Identifier [Axis]: Artera Services, LLC, Construction & Engineering      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 4,843 4,440  
Investment, Identifier [Axis]: Artifact Bidco, Inc. | Software 1      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 0 [8],[13] 0 [10],[14]  
Investment, Identifier [Axis]: Artifact Bidco, Inc. | Software 2      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 0 [8],[13] 0 [10],[14]  
Investment, Identifier [Axis]: Artifact Bidco, Inc. | Software 3      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 10,875 [7],[8],[11] 10,875 [9],[10],[12]  
Investment, Identifier [Axis]: Ascend Learning, LLC , Diversified Consumer Services      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 3,852 3,984  
Investment, Identifier [Axis]: Ascensus Group Holdings, Inc. | Financial Services      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 16,765 16,600 [10]  
Investment, Identifier [Axis]: Ascensus Group Holdings, Inc., Financial Services      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 7,282 7,472  
Investment, Identifier [Axis]: Athenahealth Group, Inc., Health Care Technology      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 7,814 9,935  
Investment, Identifier [Axis]: Athletico Management, LLC, Health Care Providers & Services      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value   3,577  
Investment, Identifier [Axis]: AuditBoard, Inc. | Software 1      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 10,735 [8] 10,898 [10]  
Investment, Identifier [Axis]: AuditBoard, Inc. | Software 2      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value (65) [8],[13] 0 [14]  
Investment, Identifier [Axis]: AuditBoard, Inc. | Software 3      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 22,544 [7],[8] 22,887 [9],[10]  
Investment, Identifier [Axis]: AuditBoard, Inc. | Software 4      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 5,655 [7],[8] 5,742 [9],[10]  
Investment, Identifier [Axis]: Avalara, Inc, Software      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value   5,992  
Investment, Identifier [Axis]: Aventine Holdings, LLC | Entertainment      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 36,847 [8],[15] 41,466 [9],[10]  
Investment, Identifier [Axis]: Aventine Holdings, LLC | Entertainment 1      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 9,982 [8] 9,809 [9],[10]  
Investment, Identifier [Axis]: Aventine Holdings, LLC | Entertainment 2      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 24,529 [8],[11] 24,777 [9],[10],[12]  
Investment, Identifier [Axis]: Axiom Global, Inc. | Professional Services      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 46,421 [7],[8],[11] 46,659 [9],[10],[12]  
Investment, Identifier [Axis]: Azurite Intermediate Holdings, Inc. | Software 1      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 22,018 [8] 22,639 [10]  
Investment, Identifier [Axis]: Azurite Intermediate Holdings, Inc. | Software 2      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 9,688 [8] 0 [10],[14]  
Investment, Identifier [Axis]: Azurite Intermediate Holdings, Inc. | Software 3      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value (91) [8],[13] 9,961 [10]  
Investment, Identifier [Axis]: BCPE Oceandrive Buyer, Inc. | Health Care Providers & Services      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 12,529 [8],[16],[17],[18] 12,528 [10],[12],[19],[20],[21]  
Investment, Identifier [Axis]: BCPE Oceandrive Buyer, Inc. | Health Care Providers & Services 1      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 3,433 [8],[18] 0 [10],[14],[21]  
Investment, Identifier [Axis]: BCPE Oceandrive Buyer, Inc. | Health Care Providers & Services 2      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 5,330 [8],[18] 4,984 [10],[21]  
Investment, Identifier [Axis]: BCPE Oceandrive Buyer, Inc. | Health Care Providers & Services 3      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 8,884 [8],[18] 8,307 [10],[21]  
Investment, Identifier [Axis]: BCPE Oceandrive Buyer, Inc. | Health Care Providers & Services 4      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value [8],[18] 4,346    
Investment, Identifier [Axis]: BCPE Oceandrive Buyer, Inc., Equity/Other Investments      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 12,529 12,528 $ 0
Investment, Identifier [Axis]: BCPE Oceandrive Buyer, Inc., Senior Secured First Lien Debt      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value   0 0
Investment, Identifier [Axis]: BCPE Oceandrive Buyer, Inc., Senior Secured First Lien Debt 1      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 3,433 0 0
Investment, Identifier [Axis]: BCPE Oceandrive Buyer, Inc., Senior Secured First Lien Debt 2      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 8,884 8,307 0
Investment, Identifier [Axis]: BCPE Oceandrive Buyer, Inc., Senior Secured First Lien Debt 3      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 5,330 4,984 0
Investment, Identifier [Axis]: BCPE Oceandrive Buyer, Inc., Senior Secured First Lien Debt 4      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 4,346 0  
Investment, Identifier [Axis]: Battalion CLO, Ltd. 21-17A F, Capital Markets      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 417 570  
Investment, Identifier [Axis]: Bayou Holdings Buyer, Inc. | Professional Services 1      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 0 [8],[13] (29) [10],[14]  
Investment, Identifier [Axis]: Bayou Holdings Buyer, Inc. | Professional Services 2      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 0 [8],[13] (31) [10],[14]  
Investment, Identifier [Axis]: Bayou Holdings Buyer, Inc. | Professional Services 3      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 21,196 [7],[8] 21,200 [9],[10]  
Investment, Identifier [Axis]: Beach Acquisition Bidco, LLC, Textiles, Apparel & luxury goods      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 1,448 1,460  
Investment, Identifier [Axis]: Bella Holding Co., LLC , Health Care Providers & Services      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 7,920    
Investment, Identifier [Axis]: Bella Holding Co., LLC, Health Care Providers & Services      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value   8,047  
Investment, Identifier [Axis]: Belron Finance 2019, LLC, Diversified Consumer Services      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 5,691 5,756  
Investment, Identifier [Axis]: Big Apple Advisory, LLC | Financial Services 1      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 6,092 [8],[13] 5,209 [10],[14]  
Investment, Identifier [Axis]: Big Apple Advisory, LLC | Financial Services 2      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 0 [8],[13] 0 [10],[14]  
Investment, Identifier [Axis]: Big Apple Advisory, LLC | Financial Services 3      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 46,929 [7],[8],[11] 47,166 [9],[10],[12]  
Investment, Identifier [Axis]: Bingo Group Buyer, Inc. | Commercial Services & Supplies 1      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 1,543 [8] 0 [10],[14]  
Investment, Identifier [Axis]: Bingo Group Buyer, Inc. | Commercial Services & Supplies 2      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 1,682 [8] 1,551 [10]  
Investment, Identifier [Axis]: Bingo Group Buyer, Inc. | Commercial Services & Supplies 3      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 644 [8],[13] 1,691 [10]  
Investment, Identifier [Axis]: Bingo Group Buyer, Inc. | Commercial Services & Supplies 4      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value [10],[14]   20  
Investment, Identifier [Axis]: Bingo Group Buyer, Inc. | Commercial Services & Supplies 5      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 5,382 [7],[8],[11] 5,410 [9],[10],[12]  
Investment, Identifier [Axis]: Bingo Group Buyer, Inc.| Commercial Services & Supplies 4      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value [8],[13] 20    
Investment, Identifier [Axis]: Black Mountain Sand, LLC | Energy Equipment & Services      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 1,304 [8],[17],[22] 1,304 [10],[19],[20],[23]  
Investment, Identifier [Axis]: Blackhawk Network Holdings, Inc., Professional Services      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 4,873 4,944  
Investment, Identifier [Axis]: Blackstone CQP Holdco, LP, Oil, Gas & Consumable Fuels      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value   4,929  
Investment, Identifier [Axis]: Bond German BidCo 2 GmbH Chemicals      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 1,690    
Investment, Identifier [Axis]: Bond US Bidco 1, Inc., Chemicals      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 504    
Investment, Identifier [Axis]: CCI Buyer, Inc. | Wireless Telecommunication Services 1      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 0 [8],[13] 0 [10],[14]  
Investment, Identifier [Axis]: CCI Buyer, Inc. | Wireless Telecommunication Services 2      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 51,867 [7],[8],[11] 52,129 [9],[10],[12]  
Investment, Identifier [Axis]: CD&R Hydra Buyer, Inc., Industrial Conglomerates      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 8,150 6,182  
Investment, Identifier [Axis]: CNT Holdings I Corp., Personal Care Products      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 6,003 6,043  
Investment, Identifier [Axis]: CQP Holdco, LP, Oil, Gas & Consumable Fuels      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 4,884    
Investment, Identifier [Axis]: CRS-SPV, Inc. | Chemicals      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value [10],[19],[20],[24]   2,008  
Investment, Identifier [Axis]: CRS-SPV, Inc., Equity/Other Investments      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 0 2,008 1,704
Investment, Identifier [Axis]: Calcasieu Pass Funding, LLC Energy Equipment & Services      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 3,707    
Investment, Identifier [Axis]: Capstone Acquisition Holdings, Inc. | Air Freight & Logistics 1      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 207 [8] 208 [10]  
Investment, Identifier [Axis]: Capstone Acquisition Holdings, Inc. | Air Freight & Logistics 2      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 20,446 [7],[8] 20,550 [9],[10]  
Investment, Identifier [Axis]: Capstone Acquisition Holdings, Inc. | Air Freight & Logistics 3      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value [8],[13] 0    
Investment, Identifier [Axis]: Carlyle GMS CLO, 16-3A FRR, Capital Markets      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 1,731 1,823  
Investment, Identifier [Axis]: Carr, Riggs & Ingram Capital, LLC | Financial Services 1      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 2,090 [8],[13] 1,592 [10],[14]  
Investment, Identifier [Axis]: Carr, Riggs & Ingram Capital, LLC | Financial Services 2      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 441 [8],[13] 0 [10],[14]  
Investment, Identifier [Axis]: Carr, Riggs & Ingram Capital, LLC | Financial Services 3      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 11,562 [7],[8],[11] 11,620 [9],[10],[12]  
Investment, Identifier [Axis]: Center Phase Energy, LLC | Electric Utilities 1      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 2,386 [8],[17],[22] 10,305 [9],[10]  
Investment, Identifier [Axis]: Center Phase Energy, LLC | Electric Utilities 2      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 748 [8],[17],[22] 15,186 [9],[10]  
Investment, Identifier [Axis]: Center Phase Energy, LLC | Electric Utilities 3      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 10,305 [7],[8] 2,386 [10],[20],[23]  
Investment, Identifier [Axis]: Center Phase Energy, LLC | Electric Utilities 4      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 15,109 [7],[8] 636 [10],[20],[23]  
Investment, Identifier [Axis]: Charter Communications Operating, LLC Media      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 644    
Investment, Identifier [Axis]: Charter Industries Holdings, LLC | Distributors 1      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 0 [8],[13] (34) [10],[14]  
Investment, Identifier [Axis]: Charter Industries Holdings, LLC | Distributors 2      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 0 [8],[13] (51) [10],[14]  
Investment, Identifier [Axis]: Charter Industries Holdings, LLC | Distributors 3      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 29,255 [7],[8] 29,807 [9],[10]  
Investment, Identifier [Axis]: Cirque Du Soleil Holding USA Newco, Inc. | Entertainment      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 18,849 [16],[17],[25] 14,632 [19],[20],[24],[26]  
Investment, Identifier [Axis]: Cirque Du Soleil Holding USA Newco, Inc., Entertainment      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 7,018 6,756  
Investment, Identifier [Axis]: Cirque Du Soleil Holding USA Newco, Inc., Equity/Other Investments      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 0 14,632 0
Investment, Identifier [Axis]: Citadel Securities Global Holdings, LLC Financial Services      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 4,389    
Investment, Identifier [Axis]: Citadel Securities, LP, Financial Services      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value   4,432  
Investment, Identifier [Axis]: Clarios Global, LP, Automobile Components      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 9,950 10,012  
Investment, Identifier [Axis]: Cliffwater, LLC | Capital Markets 1      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value [8],[13] 0    
Investment, Identifier [Axis]: Cliffwater, LLC | Capital Markets 2      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value [7],[8],[11] 30,002    
Investment, Identifier [Axis]: Cliffwater, LLC | Financial Services 1      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value [10],[14]   0  
Investment, Identifier [Axis]: Cliffwater, LLC | Financial Services 2      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value [9],[10],[12]   30,154  
Investment, Identifier [Axis]: Clover Holding 2, LLC, Software      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 4,955 5,219  
Investment, Identifier [Axis]: Clydesdale Acquisition Holdings, Inc. Containers & Packaging      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 3,829    
Investment, Identifier [Axis]: Coalesce Merlin Purchaser, LLC | Commercial Services & Supplies 1      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 5,699 [8],[13] 715 [10],[14]  
Investment, Identifier [Axis]: Coalesce Merlin Purchaser, LLC | Commercial Services & Supplies 2      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 300 [8],[13] (32) [10],[14]  
Investment, Identifier [Axis]: Coalesce Merlin Purchaser, LLC | Commercial Services & Supplies 3      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 17,213 [7],[8],[11] 17,300 [9],[10],[12]  
Investment, Identifier [Axis]: Cold Spring Brewing, Co. | Beverages      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 20,180 [7],[8],[11] 20,556 [9],[10],[12]  
Investment, Identifier [Axis]: Communication Technology Intermediate, LLC ) | Professional Services 4      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value [7],[8] 2,408    
Investment, Identifier [Axis]: Communication Technology Intermediate, LLC | Professional Services 1      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 739 [8],[13] 1,188 [10],[14]  
Investment, Identifier [Axis]: Communication Technology Intermediate, LLC | Professional Services 2      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 24,543 [7],[8] 24,672 [9],[10]  
Investment, Identifier [Axis]: Communication Technology Intermediate, LLC | Professional Services 3      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 24,234 [7],[8] 24,357 [9],[10]  
Investment, Identifier [Axis]: Communication Technology Intermediate, LLC | Professional Services 4      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value [9],[10]   2,420  
Investment, Identifier [Axis]: Communication Technology Intermediate, LLC | Professional Services 5      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 8,537 [7],[8],[11] 8,582 [9],[10],[12]  
Investment, Identifier [Axis]: Compass Power Generation, LLC, Independent Power and Renewable Electricity Producers      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 6,178 6,467  
Investment, Identifier [Axis]: Connectwise, LL, Software      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 5,138    
Investment, Identifier [Axis]: Connectwise, LLC, Software      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value   10,427  
Investment, Identifier [Axis]: Conservice Midco, LLC, Diversified Consumer Services      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value   5,423  
Investment, Identifier [Axis]: Consolidated Precision Products Corp. | Aerospace & Defense      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 19,728 [8],[22] 21,867 [10],[23]  
Investment, Identifier [Axis]: Corelogic, Inc. | Capital Markets      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value [7] 9,110    
Investment, Identifier [Axis]: Corelogic, Inc. | IT Services      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value [9]   9,326  
Investment, Identifier [Axis]: Corelogic, Inc., Capital Markets      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 8,725    
Investment, Identifier [Axis]: Corelogic, Inc., IT Services      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value   8,879  
Investment, Identifier [Axis]: Coreweave Financing DDTL V, LLC IT Services      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 506    
Investment, Identifier [Axis]: Corfin Industries, LLC | Aerospace & Defense 1      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value [8] 1,545    
Investment, Identifier [Axis]: Corfin Industries, LLC | Aerospace & Defense 2      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value [8] 9,411    
Investment, Identifier [Axis]: Corfin Industries, LLC | Aerospace & Defense 3      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value [7],[8],[11] 15,807    
Investment, Identifier [Axis]: Corfin Industries, LLC | Aerospace & Defense 4      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value [7],[8],[11] 19,533    
Investment, Identifier [Axis]: Corfin Industries, LLC | Electrical Equipment 1      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value [10]   1,549  
Investment, Identifier [Axis]: Corfin Industries, LLC | Electrical Equipment 2      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value [10]   9,435  
Investment, Identifier [Axis]: Corfin Industries, LLC | Electrical Equipment 3      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value [9],[10],[12]   15,849  
Investment, Identifier [Axis]: Corfin Industries, LLC | Electrical Equipment 4      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value [9],[10],[12]   19,582  
Investment, Identifier [Axis]: Cornerstone Building Brands, Inc., Building Products      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value   2,798  
Investment, Identifier [Axis]: Cornerstone Chemical, Co. | Chemicals      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 0 [8],[16],[17] 3,107 [10],[19],[20]  
Investment, Identifier [Axis]: Coronis Health I, LLC | Health Care Technology      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value [8],[27] 2,820    
Investment, Identifier [Axis]: Coronis Health I, LLC | Health Care Technology 1      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 798 [8],[13],[27] 532 [10],[14],[24]  
Investment, Identifier [Axis]: Coronis Health I, LLC | Health Care Technology 2      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 4,458 [8],[27] 4,225 [10],[24]  
Investment, Identifier [Axis]: Coronis Health I, LLC | Health Care Technology 3      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 4,900 [8],[16],[17],[27] 2,751 [10],[24]  
Investment, Identifier [Axis]: Coronis Health I, LLC | Health Care Technology 4      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value [10],[19],[20],[24]   4,900  
Investment, Identifier [Axis]: Coronis Health I, LLC, Equity/Other Investments      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 4,900 4,900 0
Investment, Identifier [Axis]: Coronis Health I, LLC, Senior Secured First Lien Debt 1      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 798 532 0
Investment, Identifier [Axis]: Coronis Health I, LLC, Senior Secured First Lien Debt 2      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 4,458 4,225 0
Investment, Identifier [Axis]: Coronis Health I, LLC, Senior Secured Second Lien Debt      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 2,820 2,751 0
Investment, Identifier [Axis]: Cotiviti, Inc., Health Care Providers & Services 1      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 4,262 4,528  
Investment, Identifier [Axis]: Cotiviti, Inc., Health Care Providers & Services 2      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 8,927 9,424  
Investment, Identifier [Axis]: Crisis Prevention Institute, Inc., Diversified Consumer Services      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 2,267 2,290  
Investment, Identifier [Axis]: Crown Finance US, Inc., Entertainment      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 4,931 4,873  
Investment, Identifier [Axis]: Danish CRJ, Ltd. (2) (4), Equity/Other Investments      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value   0 0
Investment, Identifier [Axis]: DayMark Wealth Partners, LLC | Financial Services 1      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value [8],[13] (40)    
Investment, Identifier [Axis]: DayMark Wealth Partners, LLC | Financial Services 2      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value [8],[13] (5)    
Investment, Identifier [Axis]: DayMark Wealth Partners, LLC | Financial Services 3      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value [8] 2,970    
Investment, Identifier [Axis]: Demakes Borrower, LLC | Consumer Staples Distribution & Retail      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 17,466 [7],[8] 17,577 [9],[10]  
Investment, Identifier [Axis]: Directv Financing, LLC, Media      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value   196  
Investment, Identifier [Axis]: EIG Management Co., LLC, Capital Markets      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 3,442 3,442  
Investment, Identifier [Axis]: EMRLD Borrower, LP, Machinery      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 1,859    
Investment, Identifier [Axis]: Eaton Vance CDO, Ltd. 15-1A FR, Capital Markets      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 227 846  
Investment, Identifier [Axis]: Edelman Financial Center, LLC | Capital Markets      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value [9]   9,468  
Investment, Identifier [Axis]: Edelman Financial Center, LLC, Capital Markets      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value   4,734  
Investment, Identifier [Axis]: Edelman Financial Engines Center, LLC Capital Markets      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 4,760    
Investment, Identifier [Axis]: Einstein Parent, Inc. | Software 1      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value (69) [8],[13] (12) [10],[14]  
Investment, Identifier [Axis]: Einstein Parent, Inc. | Software 2      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 21,648 [7],[8],[11] 22,206 [9],[10],[12]  
Investment, Identifier [Axis]: Electric Power Engineers, LLC | Construction & Engineering 1      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value [8],[13] 6,379    
Investment, Identifier [Axis]: Electric Power Engineers, LLC | Construction & Engineering 2      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value [8],[13] 2,127    
Investment, Identifier [Axis]: Electric Power Engineers, LLC | Construction & Engineering 3      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value [7],[8],[11] 27,909    
Investment, Identifier [Axis]: Electric Power Engineers, LLC | Professional Services 1      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value [10],[14]   0  
Investment, Identifier [Axis]: Electric Power Engineers, LLC | Professional Services 2      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value [10],[14]   0  
Investment, Identifier [Axis]: Electric Power Engineers, LLC | Professional Services 3      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value [9],[10],[12]   27,909  
Investment, Identifier [Axis]: Electro-Methods, LP | Aerospace & Defense 1      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value [8],[13] 0    
Investment, Identifier [Axis]: Electro-Methods, LP | Aerospace & Defense 2      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value [7],[8],[11] 34,239    
Investment, Identifier [Axis]: Electro-Methods, LP | Machinery 1      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value [10],[14]   0  
Investment, Identifier [Axis]: Electro-Methods, LP | Machinery 2      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value [9],[10],[12]   34,412  
Investment, Identifier [Axis]: Eliassen Group, LLC | Professional Services 1      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 1,299 [7],[8] 1,344 [9],[10]  
Investment, Identifier [Axis]: Eliassen Group, LLC | Professional Services 2      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 16,247 [7],[8],[11] 16,802 [9],[10],[12]  
Investment, Identifier [Axis]: Emerald Borrower, LP Machinery      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 2,279    
Investment, Identifier [Axis]: Emerald Borrower, LP, Machinery      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value   2,297  
Investment, Identifier [Axis]: Emma Buyer, LLC Media 1      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value (1)    
Investment, Identifier [Axis]: Emma Buyer, LLC Media 2      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value (1)    
Investment, Identifier [Axis]: Emma Buyer, LLC Media 3      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 1,302    
Investment, Identifier [Axis]: Ensemble RCM, LLC, Health Care Providers & Services      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 12,945 13,368  
Investment, Identifier [Axis]: Entain, PLC, Hotels, Restaurants & Leisure 1      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 4,756 4,747  
Investment, Identifier [Axis]: Entain, PLC, Hotels, Restaurants & Leisure 2      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 3,435 3,435  
Investment, Identifier [Axis]: Epicor Software Corp., Software      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 5,760 6,086  
Investment, Identifier [Axis]: FBLC Senior Loan Fund, LLC | Investment in Joint Ventures      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 218,207 [8],[17],[18],[25],[28] 224,956 [10],[20],[21],[29]  
Investment, Identifier [Axis]: FBLC Senior Loan Fund, LLC, Joint Venture      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 218,207 224,956 404,934
Investment, Identifier [Axis]: FGT Purchaser, LLC | Specialty Retail 1      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value (296) [8],[13] (296) [10],[14]  
Investment, Identifier [Axis]: FGT Purchaser, LLC | Specialty Retail 2      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 28,449 [7],[8] 28,164 [9],[10]  
Investment, Identifier [Axis]: FNZ Group Entities, Ltd., Financial Services      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 2,327 2,330  
Investment, Identifier [Axis]: Faraday Buyer, LLC | Electrical Equipment 1      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value [9],[10]   40,805  
Investment, Identifier [Axis]: Faraday Buyer, LLC | Electrical Equipment 2      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value [9],[10]   8,644  
Investment, Identifier [Axis]: Fiesta Purchaser, Inc. Food Products      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 3,909    
Investment, Identifier [Axis]: FinThrive Software Intermediate Holdings, Inc., Health Care Technology      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 1,452 2,732  
Investment, Identifier [Axis]: First Eagle Greenway Fund II, LLC, Equity/Other Investments      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value   0 255
Investment, Identifier [Axis]: Fitness International, LLC, Hotels, Restaurants & Leisure      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 6,791 6,839  
Investment, Identifier [Axis]: FloWorks International, LLC | Machinery 1      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value [10]   4,958  
Investment, Identifier [Axis]: FloWorks International, LLC | Machinery 2      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value [9],[10],[12]   39,366  
Investment, Identifier [Axis]: FloWorks International, LLC | Trading Companies & Distributors 1      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value [8] 4,945    
Investment, Identifier [Axis]: FloWorks International, LLC | Trading Companies & Distributors 2      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value [7],[8],[11] 39,167    
Investment, Identifier [Axis]: Florida Food Products, LLC | Food Products      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value [7],[8] 7,457    
Investment, Identifier [Axis]: Florida Food Products, LLC | Food Products 1      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value [9]   7,555  
Investment, Identifier [Axis]: Florida Food Products, LLC | Food Products 2      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value [9],[10]   1,916  
Investment, Identifier [Axis]: Florida Food Products, LLC | Food Products 3      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value [9]   1,890  
Investment, Identifier [Axis]: Flow Traders Holding, LLC | Capital Markets 1      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 16,328 [8],[25] (91) [10],[14],[26]  
Investment, Identifier [Axis]: Flow Traders Holding, LLC | Capital Markets 2      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 2,835 [8],[13],[25] 16,389 [10],[26]  
Investment, Identifier [Axis]: Focus Financial Partners, LLC, Capital Markets      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 4,302 4,443  
Investment, Identifier [Axis]: Foresight Energy Operating, LL, Oil, Gas & Consumable Fuels      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 644    
Investment, Identifier [Axis]: Foresight Energy Operating, LLC | Oil, Gas & Consumable Fuels      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value [8] 1,031    
Investment, Identifier [Axis]: Foresight Energy Operating, LLC | Oil, Gas & Consumable Fuels 1      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 876 [8],[16],[17],[22] 1,037 [10]  
Investment, Identifier [Axis]: Foresight Energy Operating, LLC | Oil, Gas & Consumable Fuels 2      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value [10],[19],[20],[23]   876  
Investment, Identifier [Axis]: Foresight Energy Operating, LLC, Oil, Gas & Consumable Fuels      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value   648  
Investment, Identifier [Axis]: Freeport LNG Investments, LLLP, Oil, Gas & Consumable Fuels      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 5,004 4,820  
Investment, Identifier [Axis]: GRVTY, Inc. | Aerospace & Defense 2      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value [8],[11] 3,290    
Investment, Identifier [Axis]: GRVTY, Inc. | Aerospace & Defense 1      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value [8],[13] (23)    
Investment, Identifier [Axis]: GRVTY, Inc. | Aerospace & Defense 3      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value [8],[13] (12)    
Investment, Identifier [Axis]: Gainwell Acquisition Corp., Health Care Technology      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 2,937    
Investment, Identifier [Axis]: Galaxy US OpCo, Inc., Professional Services      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value   2,229  
Investment, Identifier [Axis]: Galway Borrower, LLC | Insurance 1      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 1,122 [8] 920 [10],[14]  
Investment, Identifier [Axis]: Galway Borrower, LLC | Insurance 2      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 1,055 [8],[13] 581 [10],[14]  
Investment, Identifier [Axis]: Galway Borrower, LLC | Insurance 3      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 0 [8],[13] 38,101 [9],[10]  
Investment, Identifier [Axis]: Galway Borrower, LLC | Insurance 4      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value [7],[8] 37,911    
Investment, Identifier [Axis]: Geon Performance Solutions, LLC, Chemicals      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 4,217 3,555  
Investment, Identifier [Axis]: Geosyntec Consultants, Inc., Professional Services      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 9,120 9,227  
Investment, Identifier [Axis]: Global Medical Response, Inc., Health Care Providers & Services      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 8,079 10,022  
Investment, Identifier [Axis]: GoHealth, Inc. | Insurance      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 1 [16],[22] 7 [19],[23]  
Investment, Identifier [Axis]: Golden State Foods, LLC, Food Products      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 6,406 6,450  
Investment, Identifier [Axis]: Gordian Medical, Inc. | Health Care Providers & Services 1      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 0 [8],[16],[17] 0 [10],[19],[20]  
Investment, Identifier [Axis]: Gordian Medical, Inc. | Health Care Providers & Services 2      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 2,944 [7],[8],[16],[17] 2,944 [9],[10],[20]  
Investment, Identifier [Axis]: Gordian Medical, Inc., Health Care Providers & Services      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 7,316    
Investment, Identifier [Axis]: Gordian Medical, Inc., Health Care Providers & Services 1      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 0 7,316  
Investment, Identifier [Axis]: Gordian Medical, Inc., Health Care Providers & Services 2      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value   0  
Investment, Identifier [Axis]: Graftech Global Enterprises, Inc. Electrical Equipment 1      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 1,042    
Investment, Identifier [Axis]: Graftech Global Enterprises, Inc. Electrical Equipment 2      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 1,824    
Investment, Identifier [Axis]: Greywolf CLO, Ltd. 20-3RA ER, Capital Markets      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 729 916  
Investment, Identifier [Axis]: Groome Purchaser, LLC | Commercial Services & Supplies 1      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 3,479 [8] (33) [10],[14]  
Investment, Identifier [Axis]: Groome Purchaser, LLC | Commercial Services & Supplies 2      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 832 [8],[13] (49) [10],[14]  
Investment, Identifier [Axis]: Groome Purchaser, LLC | Commercial Services & Supplies 3      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value (23) [8],[13] (25) [10],[14]  
Investment, Identifier [Axis]: Groome Purchaser, LLC | Commercial Services & Supplies 4      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 16,299 [7],[8] 16,368 [9],[10]  
Investment, Identifier [Axis]: Gulfside Supply, Inc., Building Products      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 3,699 4,375  
Investment, Identifier [Axis]: Hamilton Projects Acquiror, LLC, Independent Power and Renewable Electricity Producers      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value   6,617  
Investment, Identifier [Axis]: HelpSystems Holdings, Inc., Software      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 4,937 4,139  
Investment, Identifier [Axis]: Higginbotham Insurance Agency, Inc. | Insurance      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 10,046 [8],[17] 10,046 [10],[20]  
Investment, Identifier [Axis]: High Street Buyer, Inc. | Insurance      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 5,035 [8],[13] 3,259 [10],[14]  
Investment, Identifier [Axis]: Highbridge Loan Management, Ltd. 11A-17 E, Capital Markets      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 2,201 2,592  
Investment, Identifier [Axis]: Hologic, Inc. | Health Care Equipment & Supplies      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 6,964    
Investment, Identifier [Axis]: Hologic, Inc., Health Care Equipment & Supplies      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 9,777    
Investment, Identifier [Axis]: Hometown Food, Co. | Food Products      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 14,921 [7],[8],[11] 14,973 [9],[10],[12]  
Investment, Identifier [Axis]: Hospice Care Buyer, Inc. | Health Care Providers & Services 1      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 4,592 [8] 4,615 [10]  
Investment, Identifier [Axis]: Hospice Care Buyer, Inc. | Health Care Providers & Services 2      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 2,122 [8] 2,085 [10],[14]  
Investment, Identifier [Axis]: Hospice Care Buyer, Inc. | Health Care Providers & Services 3      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 2,204 [8],[13] 2,132 [10]  
Investment, Identifier [Axis]: Hospice Care Buyer, Inc. | Health Care Providers & Services 4      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 24,705 [7],[8] 24,828 [9],[10]  
Investment, Identifier [Axis]: Hospice Care Buyer, Inc. | Health Care Providers & Services 5      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 6,412 [7],[8] 6,444 [9],[10]  
Investment, Identifier [Axis]: Hospice Care Buyer, Inc. | Health Care Providers & Services 6      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 8,359 [7],[8] 8,401 [9],[10]  
Investment, Identifier [Axis]: Hospice Care Buyer, Inc. | Health Care Providers & Services 7      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 3,510 [7],[8] 3,528 [9],[10]  
Investment, Identifier [Axis]: Hudson River Trading, LLC, Capital Markets      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 5,158 5,243  
Investment, Identifier [Axis]: Hunter Communications & Technologies, LLC | Diversified Telecommunication Services 1      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value [8],[13] 410    
Investment, Identifier [Axis]: Hunter Communications & Technologies, LLC | Diversified Telecommunication Services 2      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value [8],[13] (6)    
Investment, Identifier [Axis]: Hunter Communications & Technologies, LLC | Diversified Telecommunication Services 3      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value [7],[8] 5,756    
Investment, Identifier [Axis]: Hunter Douglas, Inc., Household Durables      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 4,452 4,500  
Investment, Identifier [Axis]: Hyperion Refinance SARL Insurance      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 3,754    
Investment, Identifier [Axis]: ICAT Intermediate Holdings, LLC | Air Freight & Logistics 1      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value [8],[13] 4,658    
Investment, Identifier [Axis]: ICAT Intermediate Holdings, LLC | Air Freight & Logistics 2      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value [8],[13] (15)    
Investment, Identifier [Axis]: ICAT Intermediate Holdings, LLC | Air Freight & Logistics 3      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value [8],[13] (57)    
Investment, Identifier [Axis]: ICAT Intermediate Holdings, LLC | Air Freight & Logistics 4      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value [7],[8] 17,018    
Investment, Identifier [Axis]: ICAT Intermediate Holdings, LLC | Ground Transportation 1      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value [10],[14]   2,050  
Investment, Identifier [Axis]: ICAT Intermediate Holdings, LLC | Ground Transportation 2      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value [10],[14]   (18)  
Investment, Identifier [Axis]: ICAT Intermediate Holdings, LLC | Ground Transportation 3      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value [9],[10]   17,066  
Investment, Identifier [Axis]: ICR Operations, LLC | Professional Services 1      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value [10],[14]   3,784  
Investment, Identifier [Axis]: ICR Operations, LLC | Professional Services 2      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value [9],[10]   40,839  
Investment, Identifier [Axis]: ICR Operations, LLC | Professional Services 3      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value [9],[10]   2,219  
Investment, Identifier [Axis]: IDERA, Inc., Software      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 3,797    
Investment, Identifier [Axis]: IDERA, Inc., Software 1      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value   4,602  
Investment, Identifier [Axis]: IDERA, Inc., Software 2      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 622 933  
Investment, Identifier [Axis]: IG Investments Holdings, LLC | Professional Services 1      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 0 [8],[13] 0 [10],[14]  
Investment, Identifier [Axis]: IG Investments Holdings, LLC | Professional Services 2      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 25,869 [7],[8] 26,001 [9],[10]  
Investment, Identifier [Axis]: ION Platform Finance US, Inc., Software      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 3,283 3,803  
Investment, Identifier [Axis]: IQN Holding Corp. | Software 1      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 5,778 [8] 5,790 [10]  
Investment, Identifier [Axis]: IQN Holding Corp. | Software 2      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 889 [8],[13] 988 [10],[14]  
Investment, Identifier [Axis]: IQN Holding Corp. | Software 3      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 17,205 [7],[8],[11] 17,329 [9],[10],[12]  
Investment, Identifier [Axis]: IXS Holdings, Inc. Automobiles      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 2,964    
Investment, Identifier [Axis]: Icon Parent I, Inc., Software      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 4,621 4,981  
Investment, Identifier [Axis]: Ideal Tridon Holdings, Inc. | Machinery      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value [8],[13] (67)    
Investment, Identifier [Axis]: Ideal Tridon Holdings, Inc. | Machinery 1      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value [10],[14]   (72)  
Investment, Identifier [Axis]: Ideal Tridon Holdings, Inc. | Machinery 2      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 2,452 [8],[13] 804 [10],[14]  
Investment, Identifier [Axis]: Ideal Tridon Holdings, Inc. | Machinery 3      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 41,695 [7],[8],[11] 41,876 [9],[10],[12]  
Investment, Identifier [Axis]: Indigo Buyer, Inc. | Containers & Packaging 1      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 9,764 [8],[13] 4,007 [10],[14]  
Investment, Identifier [Axis]: Indigo Buyer, Inc. | Containers & Packaging 2      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 0 [8],[13] 0 [10],[14]  
Investment, Identifier [Axis]: Indigo Buyer, Inc. | Containers & Packaging 3      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 60,572 [7],[8] 60,879 [9],[10]  
Investment, Identifier [Axis]: InhabitIQ, Inc. | Software 1      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value (109) [8],[13] (31) [10],[14]  
Investment, Identifier [Axis]: InhabitIQ, Inc. | Software 2      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value (68) [8],[13] (20) [10],[14]  
Investment, Identifier [Axis]: InhabitIQ, Inc. | Software 3      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 25,490 [7],[8],[11] 25,897 [9],[10],[12]  
Investment, Identifier [Axis]: Integrated Efficiency Solutions, Inc, Equity/Other Investments 1      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value   0 0
Investment, Identifier [Axis]: Integrated Efficiency Solutions, Inc. | Electrical Equipment      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value [8],[16],[17],[22],[27] 0    
Investment, Identifier [Axis]: Integrated Efficiency Solutions, Inc. | Electrical Equipment 1      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value [10],[24]   1,378  
Investment, Identifier [Axis]: Integrated Efficiency Solutions, Inc. | Electrical Equipment 2      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value [10],[24],[30]   668  
Investment, Identifier [Axis]: Integrated Efficiency Solutions, Inc. | Electrical Equipment 3      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value [10],[19],[20],[23]   0  
Investment, Identifier [Axis]: Integrated Efficiency Solutions, Inc. | Electrical Equipment 4      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value [10],[19],[20],[23]   0  
Investment, Identifier [Axis]: Integrated Efficiency Solutions, Inc., Equity/Other Investments      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 0 0  
Investment, Identifier [Axis]: Integrated Efficiency Solutions, Inc., Equity/Other Investments 2      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value   0 0
Investment, Identifier [Axis]: Integrated Efficiency Solutions, Inc., Senior Secured First Lien Debt      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 0 1,378  
Investment, Identifier [Axis]: Integrated Efficiency Solutions, Inc., Senior Secured First Lien Debt 1      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value   1,378 1,393
Investment, Identifier [Axis]: Integrated Efficiency Solutions, Inc., Senior Secured First Lien Debt 2      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value   0 210
Investment, Identifier [Axis]: Integrated Efficiency Solutions, Inc., Senior Secured First Lien Debt 3      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value   0 0
Investment, Identifier [Axis]: Integrated Efficiency Solutions, Inc., Senior Secured Second Lien Debt      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 0 668 446
Investment, Identifier [Axis]: Integrated Global Services, Inc. | Commercial Services & Supplies 1      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value [10],[14]   (72)  
Investment, Identifier [Axis]: Integrated Global Services, Inc. | Commercial Services & Supplies 2      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value [10],[14]   1,560  
Investment, Identifier [Axis]: Integrated Global Services, Inc. | Commercial Services & Supplies 3      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value [9],[10],[12]   32,151  
Investment, Identifier [Axis]: Integrated Global Services, Inc. | Construction & Engineering 1      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value [8],[13] 0    
Investment, Identifier [Axis]: Integrated Global Services, Inc. | Construction & Engineering 2      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value [8],[13] 5,060    
Investment, Identifier [Axis]: Integrated Global Services, Inc. | Construction & Engineering 3      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value [7],[8],[11] 32,417    
Investment, Identifier [Axis]: International Cruise & Excursion Gallery, Inc. | Hotels, Restaurants & Leisure      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value [8],[11],[16],[17] 0    
Investment, Identifier [Axis]: International Cruise & Excursion Gallery, Inc. | Hotels, Restaurants & Leisure 1      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value [8],[11] 1,358    
Investment, Identifier [Axis]: International Cruise & Excursion Gallery, Inc. | Hotels, Restaurants & Leisure 2      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value [10],[12],[19],[20],[23]   0  
Investment, Identifier [Axis]: International Cruise & Excursion Gallery, Inc. | Hotels, Restaurants & Leisure A      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value [10],[12]   1,358  
Investment, Identifier [Axis]: Invenergy Thermal Operating I, LLC, Independent Power and Renewable Electricity Producers      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value   3,578  
Investment, Identifier [Axis]: Invenergy Thermal Operating I, LLC, Independent Power and Renewable Electricity Producers 1      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 3,411    
Investment, Identifier [Axis]: Invenergy Thermal Operating I, LLC, Independent Power and Renewable Electricity Producers 2      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 225 226  
Investment, Identifier [Axis]: Jane Street Group, LLC, Financial Services      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 7,962 8,040  
Investment, Identifier [Axis]: Jump Financial, LLC, Financial Services      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 7,186 7,124  
Investment, Identifier [Axis]: KKR Financial CLO, Ltd. 15 FR, Capital Markets      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 697 1,795  
Investment, Identifier [Axis]: Kahala Aviation, LLC | Asset Based Financing      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 58,990 [8],[18] 33,911 [10],[21]  
Investment, Identifier [Axis]: Kahala Aviation, LLC | Asset Based Financing 1      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 16,125 [8],[16],[17],[18] 10,330 [10],[19],[20],[21]  
Investment, Identifier [Axis]: Kahala Aviation, LLC, Equity/Other Investments      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 16,125 10,330 2,308
Investment, Identifier [Axis]: Kahala Aviation, LLC, Subordinated Debt      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 58,990 33,911 0
Investment, Identifier [Axis]: Kahala Ireland Opco DAC | Asset Based Financing      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value [8],[13],[18],[25] 0    
Investment, Identifier [Axis]: Kahala Ireland Opco DAC, Subordinated Debt      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value   0 0
Investment, Identifier [Axis]: Kahala US OpCo, LLC, Equity/Other Investments      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value   0 0
Investment, Identifier [Axis]: Kaman Corp., Aerospace & Defense 1      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value (1) 58  
Investment, Identifier [Axis]: Kaman Corp., Aerospace & Defense 2      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 4,065 6,220  
Investment, Identifier [Axis]: Kaseya, Inc., Software      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 2,887 3,772  
Investment, Identifier [Axis]: Kingpin Intermediate Holdings, LLC, Hotels, Restaurants & Leisure 1      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 4,248 4,733  
Investment, Identifier [Axis]: Kingpin Intermediate Holdings, LLC, Hotels, Restaurants & Leisure 2      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 6,000 7,331  
Investment, Identifier [Axis]: Knowledge Pro Buyer, Inc. | Professional Services 1      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 2,663 [8],[13] 21,622 [10],[14]  
Investment, Identifier [Axis]: Knowledge Pro Buyer, Inc. | Professional Services 2      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 23,080 [8],[13] 0 [10],[14]  
Investment, Identifier [Axis]: Knowledge Pro Buyer, Inc. | Professional Services 3      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 41,777 [7],[8],[11] 42,173 [9],[10],[12]  
Investment, Identifier [Axis]: Kodiak Building Partners, LLC, Building Products      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value   3,896  
Investment, Identifier [Axis]: LABL, Inc., Containers & Packaging      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value   3,093  
Investment, Identifier [Axis]: LBM Acquisition, LLC, Building Products      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 2,867    
Investment, Identifier [Axis]: LCM, Ltd. Partnership 16A ER2, Capital Markets      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 1,635 1,807  
Investment, Identifier [Axis]: LSF12 Donnelly Bidco, LLC | Machinery      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 18,643 [7],[8] 18,739 [9],[10]  
Investment, Identifier [Axis]: Labrie Environmental Group, LLC | Machinery      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value [10],[26]   21,666  
Investment, Identifier [Axis]: Lakeland Tours, LLC | Diversified Consumer Services      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value [8],[11],[15] 2,026    
Investment, Identifier [Axis]: Lakeland Tours, LLC | Diversified Consumer Services 1      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 0 [8],[11],[16],[17] 45 [9],[10],[12],[30]  
Investment, Identifier [Axis]: Lakeland Tours, LLC | Diversified Consumer Services 2      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value [10],[12],[30]   1,414  
Investment, Identifier [Axis]: LaserShip, Inc. | Air Freight & Logistics      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value [15] 270    
Investment, Identifier [Axis]: LaserShip, Inc. | Ground Transportation      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value   838  
Investment, Identifier [Axis]: Last Dance Intermediate II, LLC | Diversified Telecommunication Services 1      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 2,944 [8],[13] 3,987 [10],[14]  
Investment, Identifier [Axis]: Last Dance Intermediate II, LLC | Diversified Telecommunication Services 2      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 15,349 [8] (44) [10],[14]  
Investment, Identifier [Axis]: Last Dance Intermediate II, LLC | Diversified Telecommunication Services 3      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 0 [8],[13] 18,884 [9],[10],[12]  
Investment, Identifier [Axis]: Last Dance Intermediate II, LLC | Diversified Telecommunication Services 4      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 19,054 [7],[8],[11] 19,059 [9],[10],[12]  
Investment, Identifier [Axis]: Last Dance Intermediate II, LLC | Diversified Telecommunication Services 5      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value [7],[8],[11] 19,312    
Investment, Identifier [Axis]: Lighthouse Intelligence, Ltd. | Software 1      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 22,085 [8],[25] (154) [10],[14],[26]  
Investment, Identifier [Axis]: Lighthouse Intelligence, Ltd. | Software 2      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value (345) [8],[13],[25] (110) [10],[14],[26]  
Investment, Identifier [Axis]: Lighthouse Intelligence, Ltd. | Software 3      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value (246) [8],[13],[25] 22,370 [10],[26]  
Investment, Identifier [Axis]: MGTF Holdco, LLC | Media      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value [10],[19],[20],[21],[23]   0  
Investment, Identifier [Axis]: MGTF Holdco, LLC, Equity/Other Investments      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value   0 0
Investment, Identifier [Axis]: MGTF Radio Company, LLC | Media      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value [10],[21],[30]   11,408  
Investment, Identifier [Axis]: MGTF Radio Company, LLC, Senior Secured First Lien Debt      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 0 11,408 31,672
Investment, Identifier [Axis]: MH Sub I, LLC, IT Services      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 5,184 4,978  
Investment, Identifier [Axis]: MRI Software, LLC | Software 1      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 2,147 [8] 52 [10],[14]  
Investment, Identifier [Axis]: MRI Software, LLC | Software 2      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 6,633 [8] 11 [10],[14]  
Investment, Identifier [Axis]: MRI Software, LLC | Software 3      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 233 [8],[13] 2,180 [10]  
Investment, Identifier [Axis]: MRI Software, LLC | Software 4      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 14 [8],[13] 6,734 [10]  
Investment, Identifier [Axis]: MWH Intermediate II, LLC | Capital Markets 1      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value [8] 8,945    
Investment, Identifier [Axis]: MWH Intermediate II, LLC | Capital Markets 2      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value [8],[13] 930    
Investment, Identifier [Axis]: MWH Intermediate II, LLC | Capital Markets 3      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value [7],[8] 15,215    
Investment, Identifier [Axis]: MWH Intermediate II, LLC | Financial Services 1      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value [10],[14]   1,941  
Investment, Identifier [Axis]: MWH Intermediate II, LLC | Financial Services 2      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value [10],[14]   (13)  
Investment, Identifier [Axis]: MWH Intermediate II, LLC | Financial Services 3      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value [9],[10]   15,284  
Investment, Identifier [Axis]: Mandrake Bidco, Inc. | Machinery 1      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 0 [8],[13] 0 [10],[14]  
Investment, Identifier [Axis]: Mandrake Bidco, Inc. | Machinery 2      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 55,557 [7],[8],[11] 55,557 [9],[10],[12]  
Investment, Identifier [Axis]: Manna Pro Products, LLC | Food Products 1      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value [8] 3,237    
Investment, Identifier [Axis]: Manna Pro Products, LLC | Food Products 2      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value [8],[13] (135)    
Investment, Identifier [Axis]: Manna Pro Products, LLC | Food Products 3      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value [8],[11] 1,543    
Investment, Identifier [Axis]: Manna Pro Products, LLC | Food Products 4      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value [8],[11] 5,550    
Investment, Identifier [Axis]: Manna Pro Products, LLC | Food Products 5      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value [8],[11] 19,574    
Investment, Identifier [Axis]: Manna Pro Products, LLC | Specialty Retail 1      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value [10]   3,341  
Investment, Identifier [Axis]: Manna Pro Products, LLC | Specialty Retail 2      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value [10],[14]   (430)  
Investment, Identifier [Axis]: Manna Pro Products, LLC | Specialty Retail 3      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value [10]   1,593  
Investment, Identifier [Axis]: Manna Pro Products, LLC | Specialty Retail 4      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value [10]   5,729  
Investment, Identifier [Axis]: Manna Pro Products, LLC | Specialty Retail 5      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value [10]   20,204  
Investment, Identifier [Axis]: Maravai Intermediate Holdings, LLC | Life Sciences Tools & Services 1      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value [8],[13],[25] (42)    
Investment, Identifier [Axis]: Maravai Intermediate Holdings, LLC | Life Sciences Tools & Services 2      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value [8],[11],[25] 14,077    
Investment, Identifier [Axis]: Max US Bidco, Inc., Food Products      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 4,438 3,755  
Investment, Identifier [Axis]: McDonald Worley, P.C. | Professional Services      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value [8],[16],[17] 10,828    
Investment, Identifier [Axis]: McDonald Worley, P.C. | Professional Services 1      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 4,845 [8],[13],[15] 6,513 [10],[14],[30]  
Investment, Identifier [Axis]: McDonald Worley, P.C. | Professional Services 2      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value [10],[19],[20]   10,264  
Investment, Identifier [Axis]: Medical Management Resource Group, LLC | Health Care Providers & Services 1      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value (26) [8],[13] 744 [10],[14]  
Investment, Identifier [Axis]: Medical Management Resource Group, LLC | Health Care Providers & Services 2      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 9,136 [7],[8] 9,184 [9],[10]  
Investment, Identifier [Axis]: Medical Management Resource Group, LLC | Health Care Providers & Services 3      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 22,117 [7],[8] 22,233 [9],[10]  
Investment, Identifier [Axis]: Megavolt Borrower, LLC | Construction & Engineering      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 36,803 [7],[8],[11] 36,989 [9],[10],[12]  
Investment, Identifier [Axis]: Merlin Buyer, Inc., Machinery      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 2,503 1,118  
Investment, Identifier [Axis]: Mermaid Bidco Inc, IT Services      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value   7,481  
Investment, Identifier [Axis]: Mermaid Bidco, Inc. , IT Services      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 7,177    
Investment, Identifier [Axis]: Michael Baker International, LLC | Construction & Engineering      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value [8] 17,231    
Investment, Identifier [Axis]: Michael Baker International, LLC | Professional Services      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value [10]   18,223  
Investment, Identifier [Axis]: Midwest Can Company, LLC | Containers & Packaging      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 0 [8],[13] 27,902 [9],[10],[12]  
Investment, Identifier [Axis]: Midwest Can Company, LLC | Containers & Packaging 1      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value [7],[8],[11] 26,494    
Investment, Identifier [Axis]: Mirra-Primeaccess Holdings, LLC | Health Care Providers & Services 1      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 60,959 [8] 7,316 [10],[14]  
Investment, Identifier [Axis]: Mirra-Primeaccess Holdings, LLC | Health Care Providers & Services 2      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 7,316 [8],[13] 61,279 [10]  
Investment, Identifier [Axis]: Monogram Food Solutions, LLC, Food Products      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 2,074 2,088  
Investment, Identifier [Axis]: Motor Vehicle Software Corp. | Software      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 1,077 [8],[16],[17],[31] 1,077 [10],[19],[20],[32]  
Investment, Identifier [Axis]: Multi-Color Corp., Containers & Packaging      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 2,151    
Investment, Identifier [Axis]: Multi-Color Corp., Containers & Packaging 1      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 44    
Investment, Identifier [Axis]: Multi-Color Corp., Containers & Packaging 2      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 688    
Investment, Identifier [Axis]: Multi-Color Corp., Containers & Packaging 3      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 2    
Investment, Identifier [Axis]: Muth Mirror Systems, LLC | Automobile Components (1)      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value [8],[16],[17],[22] 0    
Investment, Identifier [Axis]: Muth Mirror Systems, LLC | Automobile Components (2)      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value [8],[16],[17],[22] 0    
Investment, Identifier [Axis]: Muth Mirror Systems, LLC | Automobile Components 1      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value (11) [8],[13],[15] 396 [10],[14],[30]  
Investment, Identifier [Axis]: Muth Mirror Systems, LLC | Automobile Components 2      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 4,549 [8],[15] 7,624 [10],[30]  
Investment, Identifier [Axis]: Muth Mirror Systems, LLC | Automobile Components 3      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value [10],[19],[20],[23]   0  
Investment, Identifier [Axis]: Muth Mirror Systems, LLC | Automobile Components 4      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value [10],[19],[20],[23]   0  
Investment, Identifier [Axis]: Neptune Bidco US, Inc., Interactive Media & Services      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value   579  
Investment, Identifier [Axis]: NewStar Arlington Senior Loan Program, LLC 14-1A FR | Capital Markets      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 3,248 [8],[17],[25],[27] 4,322 [10],[20],[24],[26]  
Investment, Identifier [Axis]: NewStar Arlington Senior Loan Program, LLC 14-1A FR, Collateralized Securities      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 3,248 4,322 4,237
Investment, Identifier [Axis]: NewStar Arlington Senior Loan Program, LLC 14-1A SUB | Capital Markets      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 183 [8],[17],[25],[27],[33] 0 [10],[20],[24],[26],[34]  
Investment, Identifier [Axis]: NewStar Arlington Senior Loan Program, LLC 14-1A SUB, Collateralized Securities      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 183 0 2,170
Investment, Identifier [Axis]: NewStar Fairfield Fund CLO, Ltd. 2015-1RA SUB | Capital Markets      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value [8],[17],[25],[27],[33] 467    
Investment, Identifier [Axis]: Newstar Fairfield Fund CLO, Ltd. 2015-1RA F, Collateralized Securities      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value   0 2,457
Investment, Identifier [Axis]: Newstar Fairfield Fund CLO, Ltd. 2015-1RA SUB | Capital Markets      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value [10],[20],[24],[26],[34]   477  
Investment, Identifier [Axis]: Newstar Fairfield Fund CLO, Ltd. 2015-1RA SUB, Collateralized Securities      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 467 477 1,208
Investment, Identifier [Axis]: Nexus Buyer, LLC , Capital Markets      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 4,750    
Investment, Identifier [Axis]: Nexus Buyer, LLC, Capital Markets      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value   4,889  
Investment, Identifier [Axis]: Norvax, LLC | Insurance 1      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 229 [8] 354 [10]  
Investment, Identifier [Axis]: Norvax, LLC | Insurance 2      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 0 [8],[15] 228 [10]  
Investment, Identifier [Axis]: Nouryon Finance B.V., Chemicals      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 2,191 2,202  
Investment, Identifier [Axis]: ORG GC Holdings, LLC | Professional Services      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value [8],[27] 10,112    
Investment, Identifier [Axis]: ORG GC Holdings, LLC | Professional Services (1)      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value [8],[16],[17],[22],[27] 0    
Investment, Identifier [Axis]: ORG GC Holdings, LLC | Professional Services 1      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 2,433 [8],[15],[27] 10,111 [10],[24]  
Investment, Identifier [Axis]: ORG GC Holdings, LLC | Professional Services 2      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 0 [8],[16],[17],[22],[27] 2,810 [10],[24],[30]  
Investment, Identifier [Axis]: ORG GC Holdings, LLC | Professional Services 3      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value [10],[19],[20],[23],[24]   0  
Investment, Identifier [Axis]: ORG GC Holdings, LLC | Professional Services 4      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value [10],[19],[20],[23],[24]   0  
Investment, Identifier [Axis]: ORG GC Holdings, LLC, Equity/Other Investments 1      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 0 0 0
Investment, Identifier [Axis]: ORG GC Holdings, LLC, Equity/Other Investments 2      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 0 0 0
Investment, Identifier [Axis]: ORG GC Holdings, LLC, Equity/Other Investments 3      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value   0 0
Investment, Identifier [Axis]: ORG GC Holdings, LLC, Senior Secured First Lien Debt      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 10,112 10,111 10,112
Investment, Identifier [Axis]: ORG GC Holdings, LLC, Senior Secured Second Lien Debt      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 2,433 2,810 4,999
Investment, Identifier [Axis]: OSV Thunderbold Topco, Inc. | Professional Services      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value [8] 4,185    
Investment, Identifier [Axis]: OSV Thunderbold Topco, Inc. | Professional Services 1      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value [8],[16],[17] 589    
Investment, Identifier [Axis]: Obra Capital, Inc. | Capital Markets      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value [8] 4,095    
Investment, Identifier [Axis]: Obra Capital, Inc. | Capital Markets 1      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value [8],[16],[17] 332    
Investment, Identifier [Axis]: Odessa Technologies, Inc. | Software 1      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 0 [8],[13] 0 [10],[14]  
Investment, Identifier [Axis]: Odessa Technologies, Inc. | Software 2      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 20,130 [7],[8] 20,236 [9],[10]  
Investment, Identifier [Axis]: Omnia Partners, LLC , Commercial Services & Supplies      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value   6,171  
Investment, Identifier [Axis]: Omnia Partners, LLC, Commercial Services & Supplies      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 6,124    
Investment, Identifier [Axis]: OneDigital Borrower, LLC Insurance      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 2,894    
Investment, Identifier [Axis]: OneSource Virtual, Inc. | Professional Services 1      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value [8],[13] (13)    
Investment, Identifier [Axis]: OneSource Virtual, Inc. | Professional Services 2      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value [8] 18,473    
Investment, Identifier [Axis]: PG&E Corp., Electric Utilities      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 9,496 9,412  
Investment, Identifier [Axis]: PODS, LLC, Air Freight & Logistics      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 3,886 7,343  
Investment, Identifier [Axis]: PODS, LLC, Air Freight & Logistics 2      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 2,926    
Investment, Identifier [Axis]: Palmdale Oil Co., LLC | Oil, Gas & Consumable Fuels      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value [10]   3,335  
Investment, Identifier [Axis]: Palmdale Oil Co., LLC | Oil, Gas & Consumable Fuels 1      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value [8] 4,318    
Investment, Identifier [Axis]: Palmdale Oil Co., LLC | Oil, Gas & Consumable Fuels 2      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value [8],[13] (15)    
Investment, Identifier [Axis]: Peer Holding III B.V., Broadline Retail      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 5,917 5,961  
Investment, Identifier [Axis]: PennantPark Credit Opportunities Fund II, LP | Capital Markets      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 653 [16],[17],[25],[27] 552 [19],[20],[24],[26]  
Investment, Identifier [Axis]: PennantPark Credit Opportunities Fund II, LP, Equity/Other Investments      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 653 552 603
Investment, Identifier [Axis]: Peraton Corp Communications Equipment      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 1,795    
Investment, Identifier [Axis]: Peraton Corp., Communications Equipment      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 5,181 7,636  
Investment, Identifier [Axis]: PetSmart, LLC, Specialty Retail      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 2,444 2,442  
Investment, Identifier [Axis]: PetVet Care Centers, LLC | Health Care Providers & Services 1      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 806 [8],[13] 210 [10],[14]  
Investment, Identifier [Axis]: PetVet Care Centers, LLC | Health Care Providers & Services 2      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 27,127 [7],[8],[11] 28,841 [9],[10],[12]  
Investment, Identifier [Axis]: Pie Buyer, Inc. | Consumer Staples Distribution & Retail 1      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 2,194 [8] 2,323 [10]  
Investment, Identifier [Axis]: Pie Buyer, Inc. | Consumer Staples Distribution & Retail 2      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 7,355 [7],[8] 7,787 [9],[10]  
Investment, Identifier [Axis]: Pie Buyer, Inc. | Consumer Staples Distribution & Retail 3      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 1,929 [7],[8] 2,042 [9],[10]  
Investment, Identifier [Axis]: Pie Buyer, Inc. | Consumer Staples Distribution & Retail 4      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 33,982 [7],[8],[11] 35,981 [9],[10],[12]  
Investment, Identifier [Axis]: Pie Buyer, Inc. | Consumer Staples Distribution & Retail 5      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 2,513 [7],[8],[11] 2,660 [9],[10],[12]  
Investment, Identifier [Axis]: Pluralsight, LLC | Software      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 0 [8],[16],[17] 0 [10],[19],[20]  
Investment, Identifier [Axis]: Pluralsight, LLC | Software 1      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 4,563 [8] 4,600 [10]  
Investment, Identifier [Axis]: Pluralsight, LLC | Software 2      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 2,318 [8] 7,422 [10]  
Investment, Identifier [Axis]: Pluralsight, LLC | Software 3      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value (35) [8],[13] 2,336 [10]  
Investment, Identifier [Axis]: Pluralsight, LLC | Software 4      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value [8],[13] (14)    
Investment, Identifier [Axis]: Pluralsight, LLC | Software 5      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value [8],[15] 846    
Investment, Identifier [Axis]: Pluto Acquisition I, Inc. | Health Care Providers & Services      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 3,345    
Investment, Identifier [Axis]: Pluto Acquisition I, Inc. | Health Care Providers & Services 1      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 33,540 [7],[8] 3,337  
Investment, Identifier [Axis]: Pluto Acquisition I, Inc. | Health Care Providers & Services 2      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value [9],[10]   32,134  
Investment, Identifier [Axis]: Pluto Acquisition I, Inc., Health Care Providers & Services      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 8,937 7,984  
Investment, Identifier [Axis]: Point Broadband Acquisition, LLC | Diversified Telecommunication Services 1      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 124 [8],[16],[17],[22] 124 [10],[19],[20],[23]  
Investment, Identifier [Axis]: Point Broadband Acquisition, LLC | Diversified Telecommunication Services 2      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 4,935 [8],[16],[17],[22] 4,935 [10],[19],[23]  
Investment, Identifier [Axis]: Post Road Equipment Finance, LLC | Asset Based Financing      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 138,475 [8],[17],[18],[22],[28] 128,252 [10],[20],[21],[23],[29]  
Investment, Identifier [Axis]: Post Road Equipment Finance, LLC | Asset Based Financing 1      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 0 [8],[13],[18],[28] 34,000 [10],[14],[21],[29]  
Investment, Identifier [Axis]: Post Road Equipment Finance, LLC | Asset Based Financing 2      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 31,000 [8],[13],[18],[28] 0 [10],[14],[21],[29]  
Investment, Identifier [Axis]: Post Road Equipment Finance, LLC | Asset Based Financing 3      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 62,600 [8],[18],[28] 62,601 [10],[21],[29]  
Investment, Identifier [Axis]: Post Road Equipment Finance, LLC, Equity/Other Investments      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 138,475 128,252 119,233
Investment, Identifier [Axis]: Post Road Equipment Finance, LLC, Subordinated Debt 1      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 62,600 62,601 62,599
Investment, Identifier [Axis]: Post Road Equipment Finance, LLC, Subordinated Debt 2      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 31,000 34,000 35,000
Investment, Identifier [Axis]: Post Road Equipment Finance, LLC, Subordinated Debt 3      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 0 0 3,000
Investment, Identifier [Axis]: Pregis TopCo, LLC, Containers & Packaging      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 6,643 6,712  
Investment, Identifier [Axis]: Pretzel Parent, Inc, Entertainment      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 3,278    
Investment, Identifier [Axis]: Pretzel Parent, Inc., Entertainment      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value   3,426  
Investment, Identifier [Axis]: Primo Brands Corp., Beverages      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 6,144    
Investment, Identifier [Axis]: ProAmpac PG Borrower, LLC, Chemicals      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 6,931    
Investment, Identifier [Axis]: Proofpoint, Inc, Software      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 6,344    
Investment, Identifier [Axis]: Proofpoint, Inc., Software      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value   6,644  
Investment, Identifier [Axis]: Pug, LLC, Entertainment      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 4,978 2,474  
Investment, Identifier [Axis]: Questex, Inc. | Media 1      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 0 [8],[13] (32) [10],[14]  
Investment, Identifier [Axis]: Questex, Inc. | Media 2      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 14,873 [8],[11] 14,703 [10],[12]  
Investment, Identifier [Axis]: Quikrete Holdings, Inc., Construction Materials 1      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 4,477 4,517  
Investment, Identifier [Axis]: Quikrete Holdings, Inc., Construction Materials 2      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 2,515 2,538  
Investment, Identifier [Axis]: RMP Group, Inc. | Health Care Technology      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 43 [8],[16],[17],[22] 246 [10],[19],[20],[23]  
Investment, Identifier [Axis]: Radiology Partners, Inc, Health Care Providers & Services      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 7,543    
Investment, Identifier [Axis]: Radiology Partners, Inc., Health Care Providers & Services      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value   7,570  
Investment, Identifier [Axis]: Raven Acquisition Holdings, LLC, Health Care Providers & Services 1      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 9,542 9,754  
Investment, Identifier [Axis]: Raven Acquisition Holdings, LLC, Health Care Providers & Services 2      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value (10) 2  
Investment, Identifier [Axis]: Reagent Chemical and Research, LLC | Chemicals 1      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 5,311 [8] 5,605 [10]  
Investment, Identifier [Axis]: Reagent Chemical and Research, LLC | Chemicals 2      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 0 [8],[13] 0 [10],[14]  
Investment, Identifier [Axis]: Reagent Chemical and Research, LLC | Chemicals 3      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 42,323 [7],[8],[11] 44,417 [9],[10],[12]  
Investment, Identifier [Axis]: Realtruck Group, Inc. Automobile Components 1      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 5,129    
Investment, Identifier [Axis]: Realtruck Group, Inc. Automobile Components 2      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 2,751    
Investment, Identifier [Axis]: Realtruck Group, Inc. Automobile Components 3      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 2,943    
Investment, Identifier [Axis]: Recess Holdings, Inc., Household Durables      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 3,315 5,373  
Investment, Identifier [Axis]: Red Planet Borrower, LLC, Media      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 2,700 7,506  
Investment, Identifier [Axis]: Relativity Oda, LLC | Software      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value [9],[10]   7,717  
Investment, Identifier [Axis]: Renaissance Holdings Corp., Diversified Consumer Services      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 3,256 3,613  
Investment, Identifier [Axis]: Resideo Funding, Inc., Building Products      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 1,917 1,934  
Investment, Identifier [Axis]: Resilience Parent, LLC | Electrical Equipment      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value [8] 9,634    
Investment, Identifier [Axis]: Resolute Investment Managers, Inc. | Capital Markets      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value [8],[16],[17] 112    
Investment, Identifier [Axis]: Resolute Investment Managers, Inc. | Financial Services      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value [10],[19],[20]   2,022  
Investment, Identifier [Axis]: Resolute Investment Managers, Inc., Capital Markets      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 55    
Investment, Identifier [Axis]: Resolute Investment Managers, Inc., Financial Services      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value   991  
Investment, Identifier [Axis]: Rialto Management Group, LLC | Capital Markets 1      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value [8],[13] 0    
Investment, Identifier [Axis]: Rialto Management Group, LLC | Capital Markets 2      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value [7],[8],[11] 20,178    
Investment, Identifier [Axis]: Rialto Management Group, LLC | Financial Services 1      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value [10],[14]   0  
Investment, Identifier [Axis]: Rialto Management Group, LLC | Financial Services 2      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value [9],[10],[12]   20,178  
Investment, Identifier [Axis]: Rithm Capital Corp., Mortgage Real Estate Investment Trusts (REITs)      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 3,009    
Investment, Identifier [Axis]: Rithum Holdings, Inc., Software      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 4,671 4,977  
Investment, Identifier [Axis]: Roadsafe Holdings, Inc. | Construction & Engineering 1      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value [7],[8] 5,345    
Investment, Identifier [Axis]: Roadsafe Holdings, Inc. | Construction & Engineering 2      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value [7],[8] 4,973    
Investment, Identifier [Axis]: Roadsafe Holdings, Inc. | Construction & Engineering 3      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value [7],[8],[11] 8,750    
Investment, Identifier [Axis]: Roadsafe Holdings, Inc. | Construction & Engineering 4      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value [7],[8],[11] 789    
Investment, Identifier [Axis]: Roadsafe Holdings, Inc. | Transportation Infrastructure 1      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value [9],[10]   7,286  
Investment, Identifier [Axis]: Roadsafe Holdings, Inc. | Transportation Infrastructure 2      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value [9],[10]   6,779  
Investment, Identifier [Axis]: Roadsafe Holdings, Inc. | Transportation Infrastructure 3      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value [9],[10],[12]   11,930  
Investment, Identifier [Axis]: Roadsafe Holdings, Inc. | Transportation Infrastructure 4      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value [9],[10],[12]   1,075  
Investment, Identifier [Axis]: Roper Industrial Products Investment Co., LLC, Industrial Conglomerates      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value   4,973  
Investment, Identifier [Axis]: S&S Holdings, LLC, Textiles, Apparel & luxury goods      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 4,590 4,668  
Investment, Identifier [Axis]: SCIH Salt Holdings, Inc. | Chemicals      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value (15) [8],[13] 315 [10],[14]  
Investment, Identifier [Axis]: Saab Purchaser, Inc. | Software 1      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value (166) [8],[13] (166) [10],[14]  
Investment, Identifier [Axis]: Saab Purchaser, Inc. | Software 2      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value (22) [8],[13] (22) [10],[14]  
Investment, Identifier [Axis]: Saab Purchaser, Inc. | Software 3      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 17,705 [7],[8] 17,705 [9],[10]  
Investment, Identifier [Axis]: Saranac CLO, Ltd. 20-8A E, Capital Markets      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 618 1,095  
Investment, Identifier [Axis]: Saturn SHC Buyer Holdings, Inc. | Health Care Providers & Services 1      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value (2,580) [8],[13] (1,290) [10],[14]  
Investment, Identifier [Axis]: Saturn SHC Buyer Holdings, Inc. | Health Care Providers & Services 2      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 29,733 [7],[8] 33,449 [9],[10]  
Investment, Identifier [Axis]: Saturn SHC Buyer Holdings, Inc. | Health Care Providers & Services 3      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 10,394 [7],[8] 11,693 [9],[10]  
Investment, Identifier [Axis]: Saturn Sound Bidco, Ltd. | Aerospace & Defense 1      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value [8],[13],[25] 0    
Investment, Identifier [Axis]: Saturn Sound Bidco, Ltd. | Aerospace & Defense 2      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value [7],[8],[11],[25] 24,800    
Investment, Identifier [Axis]: Saturn Sound Bidco, Ltd. | Trading Companies & Distributors 1      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value [10],[14],[26]   (38)  
Investment, Identifier [Axis]: Saturn Sound Bidco, Ltd. | Trading Companies & Distributors 2      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value [9],[10],[12],[26]   24,589  
Investment, Identifier [Axis]: Sedgwick Claims Management Services, Inc., Health Care Providers & Services      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 7,088 7,239  
Investment, Identifier [Axis]: Sharp Services, LLC, Health Care Providers & Services      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value   3,023  
Investment, Identifier [Axis]: Sherlock Buyer Corp. | Professional Services 1      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 0 [8],[13] 0 [10],[14]  
Investment, Identifier [Axis]: Sherlock Buyer Corp. | Professional Services 2      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 15,476 [7],[8],[11] 15,558 [9],[10],[12]  
Investment, Identifier [Axis]: Siena Capital Finance, LLC | Asset Based Financing      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 72,500 [8],[18] 77,728 [10],[20],[21]  
Investment, Identifier [Axis]: Siena Capital Finance, LLC | Asset Based Financing 1      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 85,668 [8],[17],[18] 77,500 [10],[21]  
Investment, Identifier [Axis]: Siena Capital Finance, LLC, Equity/Other Investments      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 85,668 77,728 77,310
Investment, Identifier [Axis]: Siena Capital Finance, LLC, Subordinated Debt      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 72,500 77,500 49,500
Investment, Identifier [Axis]: Simplifi Holdings, Inc. | Media 1      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 1,926 [8],[13] 516 [10],[14]  
Investment, Identifier [Axis]: Simplifi Holdings, Inc. | Media 2      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 49,267 [7],[8] 49,524 [9],[10]  
Investment, Identifier [Axis]: SitusAMC Holdings Corp. | Financial Services      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 51,868 [7],[8],[11] 52,130 [9],[10],[12]  
Investment, Identifier [Axis]: Skillsoft Corp. | Professional Services      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value [19]   116  
Investment, Identifier [Axis]: Smile Brands, Inc. | Health Care Providers & Services      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 0 [8],[15] 0 [10],[19],[20]  
Investment, Identifier [Axis]: Smile Brands, Inc. | Health Care Providers & Services 1      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value [8],[16],[17] 0    
Investment, Identifier [Axis]: Smile Brands, Inc. | Health Care Providers & Services 2      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value [10]   9  
Investment, Identifier [Axis]: Sonrava Health Holdings, LLC, Health Care Providers & Services 1      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value   1,754  
Investment, Identifier [Axis]: Sonrava Health Holdings, LLC, Health Care Providers & Services 2      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value   1,617  
Investment, Identifier [Axis]: Sonrava Health Holdings, LLC, Health Care Providers & Services 3      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value   311  
Investment, Identifier [Axis]: Sotera Health Holdings, LLC, Life Sciences Tools & Services      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 7,391 7,442  
Investment, Identifier [Axis]: Sound Point CLO, Ltd. 17-2A E, Capital Markets      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 1,494 1,820  
Investment, Identifier [Axis]: Sound Point CLO, Ltd. 18-3A D, Capital Markets      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 605 819  
Investment, Identifier [Axis]: Specialty Building Products Holdings, LLC, Building Products      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 5,755 4,583  
Investment, Identifier [Axis]: Squan Holding Corp. | Wireless Telecommunication Services      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 0 [8],[16],[17] 0 [10],[19],[20]  
Investment, Identifier [Axis]: Staples, Inc., Business Services      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value   704,292  
Investment, Identifier [Axis]: Staples, Inc., Specialty Retail      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 2,727 2,799  
Investment, Identifier [Axis]: Starlight Parent, LLC, Software      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 2,252 5,472  
Investment, Identifier [Axis]: Stonepeak Nile Parent, LLC , Air Freight & Logistics      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value   4,373  
Investment, Identifier [Axis]: Stonepeak Nile Parent, LLC, Air Freight & Logistics      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 4,350    
Investment, Identifier [Axis]: Striper Buyer, LLC | Containers & Packaging      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 14,501 [7],[8] 16,652 [9],[10]  
Investment, Identifier [Axis]: SunMed Group Holdings, LLC | Health Care Equipment & Supplies 1      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 0 [8],[13] 0 [10],[14]  
Investment, Identifier [Axis]: SunMed Group Holdings, LLC | Health Care Equipment & Supplies 2      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 12,373 [7],[8] 12,438 [9],[10]  
Investment, Identifier [Axis]: Symphony CLO, Ltd. 2012-9A ER2, Capital Markets      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 2,478 2,779  
Investment, Identifier [Axis]: TEI Intermediate, LLC | Commercial Services & Supplies 1      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 5,235 [8],[13] 932 [10],[14]  
Investment, Identifier [Axis]: TEI Intermediate, LLC | Commercial Services & Supplies 2      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 384 [8],[13] 859 [10],[14]  
Investment, Identifier [Axis]: TEI Intermediate, LLC | Commercial Services & Supplies 3      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 23,349 [7],[8],[11] 23,015 [9],[10],[12]  
Investment, Identifier [Axis]: Tamko Building Products, Inc., Building Products      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 1,358    
Investment, Identifier [Axis]: Tax Defense Network, LLC | Diversified Consumer Services 1      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 0 [8],[15] 0 [10],[30]  
Investment, Identifier [Axis]: Tax Defense Network, LLC | Diversified Consumer Services 2      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 0 [8],[15] 0 [10],[30]  
Investment, Identifier [Axis]: Tax Defense Network, LLC | Diversified Consumer Services 3      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 6,391 [8],[15] 6,022 [10],[30]  
Investment, Identifier [Axis]: Tax Defense Network, LLC | Diversified Consumer Services 4      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 0 [8],[16],[17] 0 [10],[19],[20]  
Investment, Identifier [Axis]: Tax Defense Network, LLC | Diversified Consumer Services 5      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 0 [8],[16],[17] 0 [10],[19],[20]  
Investment, Identifier [Axis]: Tecta America Corp., Construction & Engineering      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 5,443 5,485  
Investment, Identifier [Axis]: Tennenbaum Waterman Fund, LP | Capital Markets      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 392 [16],[17],[25],[27] 461 [19],[20],[24],[26]  
Investment, Identifier [Axis]: Tennenbaum Waterman Fund, LP, Equity/Other Investments      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 392 461 5,802
Investment, Identifier [Axis]: The E.W. Scripps Company, Media      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 2,658    
Investment, Identifier [Axis]: The NPD Group, LP | Professional Services 1      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 0 [8],[13] 0 [10],[14]  
Investment, Identifier [Axis]: The NPD Group, LP | Professional Services 2      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 52,102 [7],[8] 52,102 [9],[10]  
Investment, Identifier [Axis]: Therapy Brands Holdings, LLC | Health Care Technology      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value [7],[8] 5,536    
Investment, Identifier [Axis]: Therapy Brands Holdings, LLC | Health Care Technology 1      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value [9],[10]   5,565  
Investment, Identifier [Axis]: Therapy Brands Holdings, LLC | Health Care Technology 2      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value [9],[10]   4,786  
Investment, Identifier [Axis]: Tivity Health, Inc. | Health Care Providers & Services      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 24,167 [7],[8] 24,291 [9],[10]  
Investment, Identifier [Axis]: TransDigm, Inc., Aerospace & Defense      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 3,881 3,914  
Investment, Identifier [Axis]: Travelpro Products, Inc. | Textiles, Apparel & Luxury Goods      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 63 [8],[16],[17],[25] 183 [10],[19],[20],[26]  
Investment, Identifier [Axis]: Traverse Midstream Partners, LLC, Oil, Gas & Consumable Fuels      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value   9,859  
Investment, Identifier [Axis]: Traverse Midstream Partners, LLC, Oil, Gas & Consumable Fuels 1      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 9,838    
Investment, Identifier [Axis]: Traverse Midstream Partners, LLC, Oil, Gas & Consumable Fuels 2      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 7,690    
Investment, Identifier [Axis]: Trinity Air Consultants Holdings Corp. | Professional Services 1      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 16,143 [8] 0 [10],[14]  
Investment, Identifier [Axis]: Trinity Air Consultants Holdings Corp. | Professional Services 2      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 0 [8],[13] 0 [10],[14]  
Investment, Identifier [Axis]: Trinity Air Consultants Holdings Corp. | Professional Services 3      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 0 [8],[13] 16,224 [10]  
Investment, Identifier [Axis]: Triple Lift, Inc. | Media 1      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value (282) [8],[13] (282) [10],[14]  
Investment, Identifier [Axis]: Triple Lift, Inc. | Media 2      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 36,443 [7],[8],[11] 36,635 [9],[10],[12]  
Investment, Identifier [Axis]: Triton Water Holdings, Inc., Beverages      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value   7,402  
Investment, Identifier [Axis]: Truck Hero, Inc., Automobile Components 1      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value   3,428  
Investment, Identifier [Axis]: Truck Hero, Inc., Automobile Components 2      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value   6,391  
Investment, Identifier [Axis]: Trystar, LLC | Electrical Equipment 1      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 12,552 [8] 2,926 [10],[14]  
Investment, Identifier [Axis]: Trystar, LLC | Electrical Equipment 2      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 0 [8],[13] 0 [10],[14]  
Investment, Identifier [Axis]: Trystar, LLC | Electrical Equipment 3      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 22,896 [7],[8],[11] 24,549 [9],[10],[12]  
Investment, Identifier [Axis]: Trystar, LLC | Electrical Equipment 4      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 10,311 [8],[11] 10,364 [10],[12]  
Investment, Identifier [Axis]: UKG, Inc., Software      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 9,012 9,642  
Investment, Identifier [Axis]: US Anesthesia Partners, Inc., Health Care Providers & Services      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 6,881 6,938  
Investment, Identifier [Axis]: US Oral Surgery Management Holdco, LLC | Health Care Providers & Services 1      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 5,050 [8] 5,050 [10]  
Investment, Identifier [Axis]: US Oral Surgery Management Holdco, LLC | Health Care Providers & Services 2      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 0 [8],[13] 0 [10],[14]  
Investment, Identifier [Axis]: US Oral Surgery Management Holdco, LLC | Health Care Providers & Services 3      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 6,997 [7],[8] 6,997 [9],[10]  
Investment, Identifier [Axis]: US Oral Surgery Management Holdco, LLC | Health Care Providers & Services 4      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 6,098 [7],[8] 6,098 [9],[10]  
Investment, Identifier [Axis]: US Oral Surgery Management Holdco, LLC | Health Care Providers & Services 5      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 17,668 [7],[8] 17,668 [9],[10]  
Investment, Identifier [Axis]: US Salt Investors, LLC | Chemicals 1      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value [8],[25] 16,521    
Investment, Identifier [Axis]: US Salt Investors, LLC | Chemicals 2      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value [8],[13],[25] (18)    
Investment, Identifier [Axis]: US Salt Investors, LLC | Metals & Mining 1      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value [10],[14]   0  
Investment, Identifier [Axis]: US Salt Investors, LLC | Metals & Mining 2      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value [9],[10]   25,657  
Investment, Identifier [Axis]: United Airlines, Inc., Passenger Airlines      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value   3,722  
Investment, Identifier [Axis]: University Support Services, LLC , Diversified Consumer Services      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value   3,882  
Investment, Identifier [Axis]: University Support Services, LLC, Diversified Consumer Services      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 4,918    
Investment, Identifier [Axis]: Univision Communications, Media      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 2,627    
Investment, Identifier [Axis]: Urban One, Inc. | Media      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 157 [17] 235 [20]  
Investment, Identifier [Axis]: Urban One, Inc. | Media 1      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value [20]   490  
Investment, Identifier [Axis]: VFH Parent, LLC, Capital Markets      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 4,948 5,010  
Investment, Identifier [Axis]: Vaco Holdings, LLC, Professional Services      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 447    
Investment, Identifier [Axis]: Vanco Payment Solutions, LLC | Software 1      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 11,092 [8] (5) [10],[14]  
Investment, Identifier [Axis]: Vanco Payment Solutions, LLC | Software 2      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value [8],[13] (5)    
Investment, Identifier [Axis]: Vanco Payment Solutions, LLC| Software 2      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value [10]   11,147  
Investment, Identifier [Axis]: Varicent Intermediate Holdings Corp. | Software 1      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 6,339 [8] 0 [10],[14]  
Investment, Identifier [Axis]: Varicent Intermediate Holdings Corp. | Software 2      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value (21) [8],[13] 5,423 [10]  
Investment, Identifier [Axis]: Varicent Intermediate Holdings Corp. | Software 3      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value (35) [8],[13] 0 [10],[14]  
Investment, Identifier [Axis]: Varicent Intermediate Holdings Corp. | Software 4      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value (54) [8],[13] 0 [10],[14]  
Investment, Identifier [Axis]: Varicent Intermediate Holdings Corp. | Software 5      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 21,076 [7],[8],[11] 21,107 [9],[10],[12]  
Investment, Identifier [Axis]: Venture CLO 43, Ltd. 21-43A E, Capital Markets      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 1,724 2,715  
Investment, Identifier [Axis]: Victors CCC Buyer, LLC | Professional Services 1      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 2,969 [8] 1,551 [10]  
Investment, Identifier [Axis]: Victors CCC Buyer, LLC | Professional Services 2      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 942 [8] 0 [10],[14]  
Investment, Identifier [Axis]: Victors CCC Buyer, LLC | Professional Services 3      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 1,543 [8] 23,455 [9],[10]  
Investment, Identifier [Axis]: Victors CCC Buyer, LLC | Professional Services 4      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value [8],[13] 0    
Investment, Identifier [Axis]: Victors CCC Buyer, LLC | Professional Services 5      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value [8],[13] 0    
Investment, Identifier [Axis]: Victors CCC Buyer, LLC | Professional Services 6      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value [7],[8] 23,334    
Investment, Identifier [Axis]: Victory Buyer, LLC | Building Products      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value [9],[10]   45,990  
Investment, Identifier [Axis]: Victory Buyer, LLC | Machinery      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value [7],[8] 37,961    
Investment, Identifier [Axis]: Victory Buyer, LLC, Building Products      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value   7,375  
Investment, Identifier [Axis]: WCG Intermediate Corp., Health Care Providers & Services      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 4,414    
Investment, Identifier [Axis]: WCG Purchaser Corp., Health Care Providers & Services      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value   4,479  
Investment, Identifier [Axis]: WHCG Purchaser III, Inc. | Health Care Providers & Services 1      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 24,712 [8] 24,091 [10]  
Investment, Identifier [Axis]: WHCG Purchaser III, Inc. | Health Care Providers & Services 2      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 10,129 [8],[15] 9,645 [10],[30]  
Investment, Identifier [Axis]: WHCG Purchaser III, Inc. | Health Care Providers & Services 3      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 0 [8],[16],[17] 0 [10],[19],[20]  
Investment, Identifier [Axis]: WIN Holdings III Corp. | Diversified Consumer Services 1      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 3,575 [8],[13] 1,192 [10],[14]  
Investment, Identifier [Axis]: WIN Holdings III Corp. | Diversified Consumer Services 2      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 41,683 [7],[8] 41,683 [9],[10]  
Investment, Identifier [Axis]: WIN Holdings III Corp. | Diversified Consumer Services 3      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 9,865 [7],[8] 9,915 [9],[10]  
Investment, Identifier [Axis]: WIN Holdings III Corp. | Diversified Consumer Services 4      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 20,154 [7],[8] 20,255 [9],[10]  
Investment, Identifier [Axis]: WPNT, LLC | Media      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value [10],[19],[20],[21],[23]   0  
Investment, Identifier [Axis]: WPNT, LLC, Equity/Other Investments      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value   0 $ 0
Investment, Identifier [Axis]: West Coast Dental Services, Inc. | Health Care Providers & Services 1      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 2,901 [8],[13] 2,898 [10],[14]  
Investment, Identifier [Axis]: West Coast Dental Services, Inc. | Health Care Providers & Services 2      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 1,325 [8] 1,332 [9],[10]  
Investment, Identifier [Axis]: West Coast Dental Services, Inc. | Health Care Providers & Services 3      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 22,186 [8] 22,299 [9],[10]  
Investment, Identifier [Axis]: WestJet Loyalty, LP, Passenger Airlines      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 5,485 5,718  
Investment, Identifier [Axis]: Western Dental Holdings, LLC, Health Care Providers & Services      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 1,340    
Investment, Identifier [Axis]: Western Dental Holdings, LLC, Health Care Providers & Services 1      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 2,057    
Investment, Identifier [Axis]: Western Dental Services, Inc., Health Care Providers & Services 1      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 942    
Investment, Identifier [Axis]: Western Dental Services, Inc., Health Care Providers & Services 2      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 0    
Investment, Identifier [Axis]: Westwood Professional Services, Inc. | Construction & Engineering 1      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 6,942 [8],[13] 4,429 [10],[14]  
Investment, Identifier [Axis]: Westwood Professional Services, Inc. | Construction & Engineering 2      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 0 [8],[13] 0 [10],[14]  
Investment, Identifier [Axis]: Westwood Professional Services, Inc. | Construction & Engineering 3      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 44,621 [7],[8],[11] 44,848 [9],[10],[12]  
Investment, Identifier [Axis]: Wharf Street Ratings Acquisition, LLC | Capital Markets 1      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value (26) [8],[13] (28) [10],[14]  
Investment, Identifier [Axis]: Wharf Street Ratings Acquisition, LLC | Capital Markets 2      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value (26) [8],[13] (28) [10],[14]  
Investment, Identifier [Axis]: Wharf Street Ratings Acquisition, LLC | Capital Markets 3      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 25,440 [7],[8] 25,550 [9],[10]  
Investment, Identifier [Axis]: White Cap Supply Holdings, LLC, Building Products      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 5,241 5,301  
Investment, Identifier [Axis]: Whitehorse, Ltd. 14-1A E | Capital Markets      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value [10],[20],[26]   62  
Investment, Identifier [Axis]: Wideopenwest Finance, LLC, Media      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 2,716    
Investment, Identifier [Axis]: Wind River CLO, Ltd. 14-2A FR, Capital Markets      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 100 91  
Investment, Identifier [Axis]: Windsor Holdings III, LLC, Chemicals      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 3,225 3,249  
Investment, Identifier [Axis]: Wipfli Advisory, LLC | Financial Services 1      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 980 [8],[13] (14) [10],[14]  
Investment, Identifier [Axis]: Wipfli Advisory, LLC | Financial Services 2      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value (18) [8],[13] (19) [10],[14]  
Investment, Identifier [Axis]: Wipfli Advisory, LLC | Financial Services 3      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 16,060 [7],[8] 16,057 [9],[10]  
Investment, Identifier [Axis]: World Business Lenders, LLC | Financial Services      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 3,967 [8],[17] 1,615 [10],[19],[20]  
Investment, Identifier [Axis]: X Corp., Interactive Media & Services 1      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value   4,857  
Investment, Identifier [Axis]: X Corp., Interactive Media & Services 2      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value   7,468  
Investment, Identifier [Axis]: YummyEarth, Inc. | Food Products      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 0 [8],[16],[17] 0 [10],[19],[20]  
Investment, Identifier [Axis]: Zayo Group Holdings, Inc., Diversified Telecommunication Services      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 3,529 4,242  
Investment, Identifier [Axis]: Zendesk, Inc. | Software 1      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 5,376 [8] 10,462 [10]  
Investment, Identifier [Axis]: Zendesk, Inc. | Software 2      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value 10,243 [8] 64,884 [9],[10]  
Investment, Identifier [Axis]: Zendesk, Inc. | Software 3      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value [8],[13] (105)    
Investment, Identifier [Axis]: Zendesk, Inc. | Software 4      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value [7],[8] 63,531    
FBLC Senior Loan Fund, LLC      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Total assets 721,472 751,516  
Fair Value $ 679,825 $ 704,292  
Number of Portfolio companies in SLF | portfolioCompany 149 139  
FBLC Senior Loan Fund, LLC | Investment, Identifier [Axis]: Largest Portfolio Company Investment      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value $ 17,528 $ 13,952  
FBLC Senior Loan Fund, LLC | Investment, Identifier [Axis]: Top Five Largest Portfolio Company Investments      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Fair Value $ 64,733 $ 62,136  
FBLC Senior Loan Fund, LLC | Weighted average      
Investment Company, Nonconsolidated Subsidiary [Line Items]      
Weighted Average Current Yield for Total Portfolio 8.00% 7.90%  
[1] Percentages are based on net assets attributable to common stock as of June 30, 2026.
[2] Unless otherwise indicated, all investments in the consolidated schedules of investments are non-affiliated, non-controlled investments.
[3] Unless otherwise indicated, all of the Company's investments or a portion thereof are pledged as collateral under the JPM Revolver Facility.
[4] Percentages are based on net assets attributable to common stock as of December 31, 2025.
[5] Unless otherwise indicated, all investments in the consolidated schedules of investments are non-affiliated, non-controlled investments.
[6] Unless otherwise indicated, all of the Company's investments or a portion thereof are pledged as collateral under the JPM Revolver Facility (as defined below).
[7] The Company's investment or a portion thereof is pledged as collateral under the JPM Credit Facility.
[8] The fair value of investments with respect to securities for which market quotations are not readily available is determined in good faith by the Company's Board of Directors (as defined below) as required by the 1940 Act. Such investments are valued using significant unobservable inputs (See Note 3 to the consolidated financial statements).
[9] The Company's investment or a portion thereof is pledged as collateral under the JPM Credit Facility (as defined below).
[10] The fair value of investments with respect to securities for which market quotations are not readily available is determined in good faith by the Company's Board of Directors (as defined below) as required by the 1940 Act. Such investments are valued using significant unobservable inputs (See Note 3 to the consolidated financial statements).
[11] The Company's investment or a portion thereof is pledged as collateral under the Wells Fargo Credit Facility (as defined below). Individual investments can be divided into parts which are pledged to separate credit facilities.
[12] The Company's investment or a portion thereof is pledged as collateral under the Wells Fargo Credit Facility. Individual investments can be divided into parts which are pledged to separate credit facilities.
[13] Position or portion thereof is an unfunded loan commitment, and no interest is being earned on the unfunded portion. The investment may be subject to an unused/letter of credit facility fee. The negative fair value, if applicable, is the result of the capitalized discount on the loan or the unfunded commitment being valued below par. The negative amortized cost, if applicable, is the result of the capitalized discount being greater than the principal amount outstanding on the loan. Please refer to Note 7 - Commitments and Contingencies for additional details.
[14] Position or portion thereof is an unfunded loan commitment, and no interest is being earned on the unfunded portion. The investment may be subject to an unused/letter of credit facility fee. The negative fair value, if applicable, is the result of the capitalized discount on the loan or the unfunded commitment being valued below par. The negative amortized cost, if applicable, is the result of the capitalized discount being greater than the principal amount outstanding on the loan. Please refer to Note 7 - Commitments and Contingencies for additional details.
[15] The investment is on non-accrual status as of June 30, 2026.
[16] Non-income producing at June 30, 2026.
[17] Securities exempt from registration under the Securities Act of 1933 (as defined below), and may be deemed to be “restricted securities.” As of June 30, 2026, the aggregate fair value of these securities is $540.2 million or 30.2% of the Company’s net assets. The initial acquisition dates have been included for such securities.
[18] The provisions of the 1940 Act classify investments based on the level of control that the Company maintains in a particular portfolio company. As defined in the 1940 Act, a company is generally presumed to be “non-controlled” when the Company owns 25% or less of the portfolio company’s outstanding voting securities and/or does not have the power to exercise control over the management or policies of such portfolio company. A company is generally presumed to be “controlled” when the Company owns more than 25% of the portfolio company’s outstanding voting securities and/or has the power to exercise control over the management or policies of such portfolio company. The Company classifies this investment as “controlled.”
[19] Non-income producing at December 31, 2025.
[20] Securities exempt from registration under the Securities Act of 1933 (as defined below), and may be deemed to be “restricted securities.” As of December 31, 2025, the aggregate fair value of these securities is $523.7 million or 28.5% of the Company’s net assets. The initial acquisition dates have been included for such securities.
[21] The provisions of the 1940 Act classify investments based on the level of control that the Company maintains in a particular portfolio company. As defined in the 1940 Act, a company is generally presumed to be “non-controlled” when the Company owns 25% or less of the portfolio company’s outstanding voting securities and/or does not have the power to exercise control over the management or policies of such portfolio company. A company is generally presumed to be “controlled” when the Company owns more than 25% of the portfolio company’s outstanding voting securities and/or has the power to exercise control over the management or policies of such portfolio company. The Company classifies this investment as “controlled.”
[22] Investments are held in the taxable wholly-owned, consolidated subsidiary, 54th Street Equity Holdings, Inc.
[23] Investments are held in the taxable wholly-owned, consolidated subsidiary, 54th Street Equity Holdings, Inc.
[24] The provisions of the 1940 Act classify investments further based on the level of ownership that the Company maintains in a particular portfolio company. As defined in the 1940 Act, a company is generally deemed as "non-affiliated" when the Company owns less than 5% of a portfolio company's outstanding voting securities and "affiliated" when the Company owns 5% or more of a portfolio company's outstanding voting securities. The Company classifies this investment as “affiliated.”
[25] All of the Company's investments, except the investments noted by this footnote, are qualifying assets under Section 55(a) of the Investment Company Act of 1940, as amended (the “1940 Act”). Under the 1940 Act, the Company may not acquire any non-qualifying asset unless, at the time the acquisition is made, qualifying assets represent at least 70% of the Company's total assets. At June 30, 2026, qualifying assets represent 91.9% of the Company's total assets.
[26] All of the Company's investments, except the investments noted by this footnote, are qualifying assets under Section 55(a) of the Investment Company Act of 1940, as amended (the “1940 Act”). Under the 1940 Act, the Company may not acquire any non-qualifying asset unless, at the time the acquisition is made, qualifying assets represent at least 70% of the Company's total assets. At December 31, 2025, qualifying assets represent 92.2% of the Company's total assets.
[27] The provisions of the 1940 Act classify investments further based on the level of ownership that the Company maintains in a particular portfolio company. As defined in the 1940 Act, a company is generally deemed as "non-affiliated" when the Company owns less than 5% of a portfolio company's outstanding voting securities and "affiliated" when the Company owns 5% or more of a portfolio company's outstanding voting securities. The Company classifies this investment as “affiliated.”
[28] The Company's investment falls under the definition of a significant subsidiary, as it exceeded the threshold of at least one of the tests under Rule 4-08(g), or exceeded the threshold of at least one of the tests under Rule 3-09. See Note 3 for summarized financial information.
[29] The Company's investment falls under the definition of a significant subsidiary, as it exceeded the threshold of at least one of the tests under Rule 4-08(g), or exceeded the threshold of at least one of the tests under Rule 3-09. See Note 3 for summarized financial information.
[30] The investment is on non-accrual status as of December 31, 2025.
[31] The investment is held through BSP TCAP Acquisition Holdings LP, which is an affiliated acquisition entity. Due to certain restrictions, such as limits on the number of partners allowable within the equity structures of the newly acquired investments, these investments are still held within the acquisition entity as of June 30, 2026.
[32] The investment is held through BSP TCAP Acquisition Holdings LP, which is an affiliated acquisition entity. Due to certain restrictions, such as limits on the number of partners allowable within the equity structures of the newly acquired investments, these investments are still held within the acquisition entity as of December 31, 2025.
[33] The Collateralized Securities - subordinated notes are treated as equity investments and are entitled to recurring distributions which are generally equal to the remaining cash flow of the payments made by the underlying fund’s securities less contractual payments to debt holders and fund expenses. The estimated yield indicated is based upon a current projection of the amount and timing of these recurring distributions and the estimated amount of repayment of principal upon termination. Such projections are periodically reviewed and adjusted, and the estimated yield may not ultimately be realized.
[34] The Collateralized Securities - subordinated notes are treated as equity investments and are entitled to recurring distributions which are generally equal to the remaining cash flow of the payments made by the underlying fund’s securities less contractual payments to debt holders and fund expenses. The estimated yield indicated is based upon a current projection of the amount and timing of these recurring distributions and the estimated amount of repayment of principal upon termination. Such projections are periodically reviewed and adjusted, and the estimated yield may not ultimately be realized.