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Investments - Capital and Unfunded Commitments (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2022
Dec. 31, 2021
Feb. 08, 2021
May 13, 2020
Schedule of Investments [Line Items]            
Total unfunded commitments $ 308,532 $ 234,658 $ 308,532 $ 234,658    
Investment, Identifier [Axis]: APC1 Holding, Delayed Draw Term Loan            
Schedule of Investments [Line Items]            
Total unfunded commitments 354 0 354 0    
Investment, Identifier [Axis]: ASC Communications, Revolver            
Schedule of Investments [Line Items]            
Total unfunded commitments 1,089 0 1,089 0    
Investment, Identifier [Axis]: ATL II MRO Holdings, Inc., Revolver            
Schedule of Investments [Line Items]            
Total unfunded commitments 1,667 0 1,667 0    
Investment, Identifier [Axis]: Acclime Holdings HK Limited , Delayed Draw Term Loan 1            
Schedule of Investments [Line Items]            
Total unfunded commitments 0 1,179 0 1,179    
Investment, Identifier [Axis]: Acclime Holdings HK Limited , Delayed Draw Term Loan 2            
Schedule of Investments [Line Items]            
Total unfunded commitments 0 110 0 110    
Investment, Identifier [Axis]: Accurus Aerospace Corporation, Revolver            
Schedule of Investments [Line Items]            
Total unfunded commitments 1,152 0 1,152 0    
Investment, Identifier [Axis]: Air Comm Corporation, LLC, Delayed Draw Term Loan 1            
Schedule of Investments [Line Items]            
Total unfunded commitments 0 11 0 11    
Investment, Identifier [Axis]: Air Comm Corporation, LLC, Delayed Draw Term Loan 2            
Schedule of Investments [Line Items]            
Total unfunded commitments 0 1,448 0 1,448    
Investment, Identifier [Axis]: Amtech LLC, Delayed Draw Term Loan            
Schedule of Investments [Line Items]            
Total unfunded commitments 1,527 2,727 1,527 2,727    
Investment, Identifier [Axis]: Amtech LLC, Revolver            
Schedule of Investments [Line Items]            
Total unfunded commitments 545 682 545 682    
Investment, Identifier [Axis]: AnalytiChem Holding GmbH, Bridge Revolver            
Schedule of Investments [Line Items]            
Total unfunded commitments 366 0 366 0    
Investment, Identifier [Axis]: AnalytiChem Holding GmbH, Delayed Draw Term Loan            
Schedule of Investments [Line Items]            
Total unfunded commitments 0 6,207 0 6,207    
Investment, Identifier [Axis]: Aquavista Watersides 2 LTD, Bridge Revolver            
Schedule of Investments [Line Items]            
Total unfunded commitments 0 503 0 503    
Investment, Identifier [Axis]: Aquavista Watersides 2 LTD, Capex / Acquisition Facility            
Schedule of Investments [Line Items]            
Total unfunded commitments 2,543 3,147 2,543 3,147    
Investment, Identifier [Axis]: Arc Education, Delayed Draw Term Loan            
Schedule of Investments [Line Items]            
Total unfunded commitments 1,900 0 1,900 0    
Investment, Identifier [Axis]: Argus Bidco Limited, CAF Term Loan            
Schedule of Investments [Line Items]            
Total unfunded commitments 789 0 789 0    
Investment, Identifier [Axis]: Argus Bidco Limited, RCF Bridge Term Loan            
Schedule of Investments [Line Items]            
Total unfunded commitments 168 0 168 0    
Investment, Identifier [Axis]: Astra Bidco Limited, Delayed Draw Term Loan            
Schedule of Investments [Line Items]            
Total unfunded commitments 876 2,571 876 2,571    
Investment, Identifier [Axis]: Avance Clinical Bidco Pty Ltd, Delayed Draw Term Loan            
Schedule of Investments [Line Items]            
Total unfunded commitments 1,295 3,497 1,295 3,497    
Investment, Identifier [Axis]: Azalea Buyer, Inc., Delayed Draw Term Loan            
Schedule of Investments [Line Items]            
Total unfunded commitments 962 962 962 962    
Investment, Identifier [Axis]: Azalea Buyer, Inc., Revolver            
Schedule of Investments [Line Items]            
Total unfunded commitments 481 481 481 481    
Investment, Identifier [Axis]: Bariacum S.A, Acquisition Facility            
Schedule of Investments [Line Items]            
Total unfunded commitments 2,028 2,161 2,028 2,161    
Investment, Identifier [Axis]: Beyond Risk Management, Inc., Delayed Draw Term Loan            
Schedule of Investments [Line Items]            
Total unfunded commitments 2,423 2,573 2,423 2,573    
Investment, Identifier [Axis]: BigHand UK Bidco Limited, Acquisition Facility            
Schedule of Investments [Line Items]            
Total unfunded commitments 0 378 0 378    
Investment, Identifier [Axis]: Biolam Group, Delayed Draw Term Loan            
Schedule of Investments [Line Items]            
Total unfunded commitments 4,783 0 4,783 0    
Investment, Identifier [Axis]: Black Angus Steakhouses, LLC, Delayed Draw Term Loan            
Schedule of Investments [Line Items]            
Total unfunded commitments 417 0 417 0    
Investment, Identifier [Axis]: Bounteous, Inc., Delayed Draw Term Loan            
Schedule of Investments [Line Items]            
Total unfunded commitments 2,840 2,840 2,840 2,840    
Investment, Identifier [Axis]: BrightSign LLC, Revolver            
Schedule of Investments [Line Items]            
Total unfunded commitments 1,329 1,329 1,329 1,329    
Investment, Identifier [Axis]: Brightpay Limited, Delayed Draw Term Loan 1            
Schedule of Investments [Line Items]            
Total unfunded commitments 0 432 0 432    
Investment, Identifier [Axis]: Brightpay Limited, Delayed Draw Term Loan 2            
Schedule of Investments [Line Items]            
Total unfunded commitments 135 144 135 144    
Investment, Identifier [Axis]: British Engineering Services Holdco Limited, Bridge Revolver            
Schedule of Investments [Line Items]            
Total unfunded commitments 0 613 0 613    
Investment, Identifier [Axis]: CAi Software, LLC, Revolver            
Schedule of Investments [Line Items]            
Total unfunded commitments 943 943 943 943    
Investment, Identifier [Axis]: CGI Parent, LLC, Revolver            
Schedule of Investments [Line Items]            
Total unfunded commitments 1,653 0 1,653 0    
Investment, Identifier [Axis]: CSL Dualcom, Capex / Acquisition Term Loan            
Schedule of Investments [Line Items]            
Total unfunded commitments 142 998 142 998    
Investment, Identifier [Axis]: Canadian Orthodontic Partners Corp., Delayed Draw Term Loan            
Schedule of Investments [Line Items]            
Total unfunded commitments 110 167 110 167    
Investment, Identifier [Axis]: Catawba River Limited, Structured Junior Note            
Schedule of Investments [Line Items]            
Total unfunded commitments 12,635 0 12,635 0    
Investment, Identifier [Axis]: Centralis Finco S.a.r.l., Incremental CAF Term Loan            
Schedule of Investments [Line Items]            
Total unfunded commitments 1,028 461 1,028 461    
Investment, Identifier [Axis]: Ceres Pharma NV, Delayed Draw Term Loan            
Schedule of Investments [Line Items]            
Total unfunded commitments 0 2,149 0 2,149    
Investment, Identifier [Axis]: Classic Collision (Summit Buyer, LLC), Delayed Draw Term Loan            
Schedule of Investments [Line Items]            
Total unfunded commitments 78 393 78 393    
Investment, Identifier [Axis]: Coastal Marina Holdings, LLC, PIK Tranche B Term Loan            
Schedule of Investments [Line Items]            
Total unfunded commitments 0 1,311 0 1,311    
Investment, Identifier [Axis]: Coastal Marina Holdings, LLC, Tranche A Term Loan            
Schedule of Investments [Line Items]            
Total unfunded commitments 0 3,576 0 3,576    
Investment, Identifier [Axis]: Command Alkon (Project Potter Buyer, LLC), Delayed Draw Term Loan            
Schedule of Investments [Line Items]            
Total unfunded commitments 0 6,018 0 6,018    
Investment, Identifier [Axis]: Comply365, LLC, Revolver            
Schedule of Investments [Line Items]            
Total unfunded commitments 935 0 935 0    
Investment, Identifier [Axis]: Coyo Uprising GmbH, Delayed Draw Term Loan            
Schedule of Investments [Line Items]            
Total unfunded commitments 419 894 419 894    
Investment, Identifier [Axis]: Crash Champions, LLC, Delayed Draw Term Loan            
Schedule of Investments [Line Items]            
Total unfunded commitments 0 5,420 0 5,420    
Investment, Identifier [Axis]: DISA Holdings Corp., Delayed Draw Term Loan            
Schedule of Investments [Line Items]            
Total unfunded commitments 1,368 0 1,368 0    
Investment, Identifier [Axis]: DISA Holdings Corp., Revolver            
Schedule of Investments [Line Items]            
Total unfunded commitments 416 0 416 0    
Investment, Identifier [Axis]: Dart Buyer, Inc., Delayed Draw Term Loan            
Schedule of Investments [Line Items]            
Total unfunded commitments 0 2,431 0 2,431    
Investment, Identifier [Axis]: DataServ Integrations, LLC, Revolver            
Schedule of Investments [Line Items]            
Total unfunded commitments 481 0 481 0    
Investment, Identifier [Axis]: DecksDirect, LLC, Revolver            
Schedule of Investments [Line Items]            
Total unfunded commitments 218 218 218 218    
Investment, Identifier [Axis]: DreamStart Bidco SAS (d/b/a SmartTrade), Acquisition Facility            
Schedule of Investments [Line Items]            
Total unfunded commitments 579 617 579 617    
Investment, Identifier [Axis]: Dune Group, Delayed Draw Term Loan            
Schedule of Investments [Line Items]            
Total unfunded commitments 624 665 624 665    
Investment, Identifier [Axis]: Dwyer Instruments, Inc., Delayed Draw Term Loan            
Schedule of Investments [Line Items]            
Total unfunded commitments 5,164 692 5,164 692    
Investment, Identifier [Axis]: EMI Porta Holdco LLC, Delayed Draw Term Loan            
Schedule of Investments [Line Items]            
Total unfunded commitments 9,272 12,458 9,272 12,458    
Investment, Identifier [Axis]: EMI Porta Holdco LLC, Revolver            
Schedule of Investments [Line Items]            
Total unfunded commitments 1,471 2,966 1,471 2,966    
Investment, Identifier [Axis]: EPS NASS Parent, Inc., Delayed Draw Term Loan            
Schedule of Investments [Line Items]            
Total unfunded commitments 257 583 257 583    
Investment, Identifier [Axis]: Eclipse Business Capital, LLC, Revolver            
Schedule of Investments [Line Items]            
Total unfunded commitments 17,455 11,818 17,455 11,818    
Investment, Identifier [Axis]: Eurofins Digital Testing International LUX Holding SARL, Delayed Draw Term Loan            
Schedule of Investments [Line Items]            
Total unfunded commitments 2,639 0 2,639 0    
Investment, Identifier [Axis]: Eurofins Digital Testing International LUX Holding SARL, Delayed Draw Term Loan1            
Schedule of Investments [Line Items]            
Total unfunded commitments 528 0 528 0    
Investment, Identifier [Axis]: Events Software BidCo Pty Ltd, Delayed Draw Term Loan            
Schedule of Investments [Line Items]            
Total unfunded commitments 640 0 640 0    
Investment, Identifier [Axis]: Express Wash Acquisition Company, LLC, Revolver            
Schedule of Investments [Line Items]            
Total unfunded commitments 115 0 115 0    
Investment, Identifier [Axis]: F24 (Stairway BidCo GmbH), Acquisition Term Loan            
Schedule of Investments [Line Items]            
Total unfunded commitments 246 405 246 405    
Investment, Identifier [Axis]: Fineline Technologies, Inc., Delayed Draw Term Loan            
Schedule of Investments [Line Items]            
Total unfunded commitments 180 180 180 180    
Investment, Identifier [Axis]: Footco 40 Limited, Delayed Draw Term Loan            
Schedule of Investments [Line Items]            
Total unfunded commitments 766 0 766 0    
Investment, Identifier [Axis]: Fortis Payment Systems, LLC, Delayed Draw Term Loan            
Schedule of Investments [Line Items]            
Total unfunded commitments 925 0 925 0    
Investment, Identifier [Axis]: FragilePak LLC, Delayed Draw Term Loan            
Schedule of Investments [Line Items]            
Total unfunded commitments 2,354 2,354 2,354 2,354    
Investment, Identifier [Axis]: GB EAGLE BUYER, INC., Revolver            
Schedule of Investments [Line Items]            
Total unfunded commitments 2,581 0 2,581 0    
Investment, Identifier [Axis]: GPZN II GmbH, CAF Term Loan            
Schedule of Investments [Line Items]            
Total unfunded commitments 560 0 560 0    
Investment, Identifier [Axis]: GROUPE PRODUCT LIFE, Delayed Draw Term Loan            
Schedule of Investments [Line Items]            
Total unfunded commitments 441 0 441 0    
Investment, Identifier [Axis]: Global Academic Group Limited, Term Loan            
Schedule of Investments [Line Items]            
Total unfunded commitments 451 0 451 0    
Investment, Identifier [Axis]: Greenhill BV, Capex Acquisition Facility            
Schedule of Investments [Line Items]            
Total unfunded commitments 255 0 255 0    
Investment, Identifier [Axis]: Gusto Aus BidCo Pty Ltd, Delayed Draw Term Loan            
Schedule of Investments [Line Items]            
Total unfunded commitments 223 0 223 0    
Investment, Identifier [Axis]: HEKA INVEST, Delayed Draw Term Loan            
Schedule of Investments [Line Items]            
Total unfunded commitments 555 0 555 0    
Investment, Identifier [Axis]: HTI Technology & Industries, Delayed Draw Term Loan            
Schedule of Investments [Line Items]            
Total unfunded commitments 2,045 0 2,045 0    
Investment, Identifier [Axis]: HTI Technology & Industries, Revolver            
Schedule of Investments [Line Items]            
Total unfunded commitments 1,364 0 1,364 0    
Investment, Identifier [Axis]: HW Holdco, LLC (Hanley Wood LLC), Delayed Draw Term Loan            
Schedule of Investments [Line Items]            
Total unfunded commitments 913 1,563 913 1,563    
Investment, Identifier [Axis]: HeartHealth Bidco Pty Ltd, Delayed Draw Term Loan            
Schedule of Investments [Line Items]            
Total unfunded commitments 313 0 313 0    
Investment, Identifier [Axis]: Heartland Veterinary Partners, LLC, Delayed Draw Term Loan            
Schedule of Investments [Line Items]            
Total unfunded commitments 267 657 267 657    
Investment, Identifier [Axis]: Heavy Construction Systems Specialists, LLC, Revolver            
Schedule of Investments [Line Items]            
Total unfunded commitments 2,632 2,632 2,632 2,632    
Investment, Identifier [Axis]: IGL Holdings III Corp., Delayed Draw Term Loan            
Schedule of Investments [Line Items]            
Total unfunded commitments 0 1,217 0 1,217    
Investment, Identifier [Axis]: INOS 19-090 GmbH, Acquisition Facility            
Schedule of Investments [Line Items]            
Total unfunded commitments 2,380 2,535 2,380 2,535    
Investment, Identifier [Axis]: ITI Intermodal, Inc., Delayed Draw Term Loan            
Schedule of Investments [Line Items]            
Total unfunded commitments 103 103 103 103    
Investment, Identifier [Axis]: ITI Intermodal, Inc., Revolver            
Schedule of Investments [Line Items]            
Total unfunded commitments 118 124 118 124    
Investment, Identifier [Axis]: Innovad Group II BV, Delayed Draw Term Loan            
Schedule of Investments [Line Items]            
Total unfunded commitments 1,261 1,825 1,261 1,825    
Investment, Identifier [Axis]: Interstellar Group B.V., Delayed Draw Term Loan 1            
Schedule of Investments [Line Items]            
Total unfunded commitments 1,310 0 1,310 0    
Investment, Identifier [Axis]: Interstellar Group B.V., Delayed Draw Term Loan 2            
Schedule of Investments [Line Items]            
Total unfunded commitments 55 0 55 0    
Investment, Identifier [Axis]: Isolstar Holding NV (IPCOM), Delayed Draw Term Loan            
Schedule of Investments [Line Items]            
Total unfunded commitments 744 0 744 0    
Investment, Identifier [Axis]: Jaguar Merger Sub Inc., Delayed Draw Term Loan            
Schedule of Investments [Line Items]            
Total unfunded commitments 422 1,961 422 1,961    
Investment, Identifier [Axis]: Jaguar Merger Sub Inc., Revolver            
Schedule of Investments [Line Items]            
Total unfunded commitments 490 490 490 490    
Investment, Identifier [Axis]: Jocassee Partners LLC            
Schedule of Investments [Line Items]            
Total contributed capital 35 30,000 35 30,000    
Total unfunded commitments 65 20,000 65 20,000    
Investment, Identifier [Axis]: Jocassee Partners LLC, Joint Venture            
Schedule of Investments [Line Items]            
Total unfunded commitments 65,000 20,000 65,000 20,000    
Investment, Identifier [Axis]: Jon Bidco Limited, Capex & Acquisition Facility            
Schedule of Investments [Line Items]            
Total unfunded commitments 1,441 0 1,441 0    
Investment, Identifier [Axis]: Jones Fish Hatcheries & Distributors LLC, Revolver            
Schedule of Investments [Line Items]            
Total unfunded commitments 418 0 418 0    
Investment, Identifier [Axis]: Kano Laboratories LLC, Delayed Draw Term Loan 1            
Schedule of Investments [Line Items]            
Total unfunded commitments 153 153 153 153    
Investment, Identifier [Axis]: Kano Laboratories LLC, Delayed Draw Term Loan 2            
Schedule of Investments [Line Items]            
Total unfunded commitments 2,830 4,544 2,830 4,544    
Investment, Identifier [Axis]: Kemmerer Operations, LLC, Delayed Draw Term Loan            
Schedule of Investments [Line Items]            
Total unfunded commitments 908 0 908 0    
Investment, Identifier [Axis]: LAF International, Acquisition Facility            
Schedule of Investments [Line Items]            
Total unfunded commitments 0 341 0 341    
Investment, Identifier [Axis]: Lambir Bidco Limited, Bridge Revolver            
Schedule of Investments [Line Items]            
Total unfunded commitments 0 941 0 941    
Investment, Identifier [Axis]: Lambir Bidco Limited, Delayed Draw Term Loan            
Schedule of Investments [Line Items]            
Total unfunded commitments 1,766 1,881 1,766 1,881    
Investment, Identifier [Axis]: Lattice Group Holdings Bidco Limited, Delayed Draw Term Loan            
Schedule of Investments [Line Items]            
Total unfunded commitments 298 0 298 0    
Investment, Identifier [Axis]: LeadsOnline, LLC, Revolver            
Schedule of Investments [Line Items]            
Total unfunded commitments 2,603 0 2,603 0    
Investment, Identifier [Axis]: Lifestyle Intermediate II, LLC, Revolver            
Schedule of Investments [Line Items]            
Total unfunded commitments 2,500 0 2,500 0    
Investment, Identifier [Axis]: LivTech Purchaser, Inc., Delayed Draw Term Loan            
Schedule of Investments [Line Items]            
Total unfunded commitments 138 82 138 82    
Investment, Identifier [Axis]: MC Group Ventures Corporation, Delayed Draw Term Loan            
Schedule of Investments [Line Items]            
Total unfunded commitments 296 817 296 817    
Investment, Identifier [Axis]: Marmoutier Holding B.V., Delayed Draw Term Loan            
Schedule of Investments [Line Items]            
Total unfunded commitments 24 405 24 405    
Investment, Identifier [Axis]: Marmoutier Holding B.V., Revolver            
Schedule of Investments [Line Items]            
Total unfunded commitments 106 162 106 162    
Investment, Identifier [Axis]: Marshall Excelsior Co., Revolver            
Schedule of Investments [Line Items]            
Total unfunded commitments 413 0 413 0    
Investment, Identifier [Axis]: Mercell Holding AS, Capex Acquisition Facility            
Schedule of Investments [Line Items]            
Total unfunded commitments 797 0 797 0    
Investment, Identifier [Axis]: Modern Star Holdings Bidco Pty Limited, Term Loan            
Schedule of Investments [Line Items]            
Total unfunded commitments 968 1,038 968 1,038    
Investment, Identifier [Axis]: Murphy Midco Limited, Delayed Draw Term Loan            
Schedule of Investments [Line Items]            
Total unfunded commitments 407 2,617 407 2,617    
Investment, Identifier [Axis]: NPM Investments 28 B.V., Delayed Draw Term Loan            
Schedule of Investments [Line Items]            
Total unfunded commitments 463 0 463 0    
Investment, Identifier [Axis]: Narda Acquisitionco., Inc., Revolver            
Schedule of Investments [Line Items]            
Total unfunded commitments 1,180 1,311 1,180 1,311    
Investment, Identifier [Axis]: Navia Benefit Solutions, Inc., Delayed Draw Term Loan            
Schedule of Investments [Line Items]            
Total unfunded commitments 0 1,261 0 1,261    
Investment, Identifier [Axis]: Nexus Underwriting Management Limited, Acquisition Facility            
Schedule of Investments [Line Items]            
Total unfunded commitments 443 541 443 541    
Investment, Identifier [Axis]: Nexus Underwriting Management Limited, Revolver            
Schedule of Investments [Line Items]            
Total unfunded commitments 0 103 0 103    
Investment, Identifier [Axis]: Novotech Aus Bidco Pty Ltd, Capex & Acquisition Facility            
Schedule of Investments [Line Items]            
Total unfunded commitments 809 0 809 0    
Investment, Identifier [Axis]: OA Buyer, Inc., Revolver            
Schedule of Investments [Line Items]            
Total unfunded commitments 1,331 1,331 1,331 1,331    
Investment, Identifier [Axis]: OAC Holdings I Corp., Revolver            
Schedule of Investments [Line Items]            
Total unfunded commitments 607 607    
Investment, Identifier [Axis]: OG III B.V., Acquisition CapEx Facility            
Schedule of Investments [Line Items]            
Total unfunded commitments 0 686 0 686    
Investment, Identifier [Axis]: OSP Hamilton Purchaser, LLC, Revolver            
Schedule of Investments [Line Items]            
Total unfunded commitments 187 187 187 187    
Investment, Identifier [Axis]: Omni Intermediate Holdings, LLC, Delayed Draw Term Loan 1            
Schedule of Investments [Line Items]            
Total unfunded commitments 0 817 0 817    
Investment, Identifier [Axis]: Omni Intermediate Holdings, LLC, Delayed Draw Term Loan 2            
Schedule of Investments [Line Items]            
Total unfunded commitments 2,289 4,357 2,289 4,357    
Investment, Identifier [Axis]: PDQ.Com Corporation, Delayed Draw Term Loan 1            
Schedule of Investments [Line Items]            
Total unfunded commitments 0 289 0 289    
Investment, Identifier [Axis]: PDQ.Com Corporation, Delayed Draw Term Loan 2            
Schedule of Investments [Line Items]            
Total unfunded commitments 6,885 10,948 6,885 10,948    
Investment, Identifier [Axis]: PSP Intermediate 4, L.L.C., Delayed Draw Term Loan            
Schedule of Investments [Line Items]            
Total unfunded commitments 727 0 727 0    
Investment, Identifier [Axis]: Pacific Health Supplies Bidco Pty Limited, CapEx Term Loan            
Schedule of Investments [Line Items]            
Total unfunded commitments 0 1,283 0 1,283    
Investment, Identifier [Axis]: Polara Enterprises, L.L.C., Revolver            
Schedule of Investments [Line Items]            
Total unfunded commitments 545 545 545 545    
Investment, Identifier [Axis]: Policy Services Company, LLC, Delayed Draw Term Loan            
Schedule of Investments [Line Items]            
Total unfunded commitments 0 6,944 0 6,944    
Investment, Identifier [Axis]: Premium Invest, Delayed Draw Term Loan            
Schedule of Investments [Line Items]            
Total unfunded commitments 2,882 1,933 2,882 1,933    
Investment, Identifier [Axis]: Profit Optics, LLC, Revolver            
Schedule of Investments [Line Items]            
Total unfunded commitments 484 0 484 0    
Investment, Identifier [Axis]: Protego Bidco B.V., Delayed Draw Term Loan            
Schedule of Investments [Line Items]            
Total unfunded commitments 792 844 792 844    
Investment, Identifier [Axis]: QPE7 SPV1 BidCo Pty Ltd, Acquisition Term Loan            
Schedule of Investments [Line Items]            
Total unfunded commitments 0 373 0 373    
Investment, Identifier [Axis]: R1 Holdings, LLC, Delayed Draw Term Loan            
Schedule of Investments [Line Items]            
Total unfunded commitments 2,623 0 2,623 0    
Investment, Identifier [Axis]: R1 Holdings, LLC, Revolver            
Schedule of Investments [Line Items]            
Total unfunded commitments 1,601 0 1,601 0    
Investment, Identifier [Axis]: RA Outdoors, LLC, Revolver            
Schedule of Investments [Line Items]            
Total unfunded commitments 1,235 0 1,235 0    
Investment, Identifier [Axis]: RTIC Subsidiary Holdings, LLC, Revolver            
Schedule of Investments [Line Items]            
Total unfunded commitments 2,381 0 2,381 0    
Investment, Identifier [Axis]: Randys Holdings, Inc., Delayed Draw Term Loan            
Schedule of Investments [Line Items]            
Total unfunded commitments 4,412 0 4,412 0    
Investment, Identifier [Axis]: Randys Holdings, Inc., Revolver            
Schedule of Investments [Line Items]            
Total unfunded commitments 1,571 0 1,571 0    
Investment, Identifier [Axis]: Rep Seko Merger Sub LLC, Delayed Draw Term Loan            
Schedule of Investments [Line Items]            
Total unfunded commitments 725 1,455 725 1,455    
Investment, Identifier [Axis]: Reward Gateway (UK) Ltd, Acquisition Facility            
Schedule of Investments [Line Items]            
Total unfunded commitments 600 1,061 600 1,061    
Investment, Identifier [Axis]: Riedel Beheer B.V., Delayed Draw Term Loan            
Schedule of Investments [Line Items]            
Total unfunded commitments 0 153 0 153    
Investment, Identifier [Axis]: Riedel Beheer B.V., Revolver            
Schedule of Investments [Line Items]            
Total unfunded commitments 0 230 0 230    
Investment, Identifier [Axis]: Royal Buyer, LLC, Delayed Draw Term Loan            
Schedule of Investments [Line Items]            
Total unfunded commitments 2,209 0 2,209 0    
Investment, Identifier [Axis]: Royal Buyer, LLC, Revolver            
Schedule of Investments [Line Items]            
Total unfunded commitments 1,340 0 1,340 0    
Investment, Identifier [Axis]: SSCP Pegasus Midco Limited, Delayed Draw Term Loan            
Schedule of Investments [Line Items]            
Total unfunded commitments 4,664 5,251 4,664 5,251    
Investment, Identifier [Axis]: Sanoptis S.A.R.L., Acquisition Capex Facility            
Schedule of Investments [Line Items]            
Total unfunded commitments 1,751 0 1,751 0    
Investment, Identifier [Axis]: Scaled Agile, Inc., Delayed Draw Term Loan            
Schedule of Investments [Line Items]            
Total unfunded commitments 416 416 416 416    
Investment, Identifier [Axis]: Scaled Agile, Inc., Revolver            
Schedule of Investments [Line Items]            
Total unfunded commitments 336 336 336 336    
Investment, Identifier [Axis]: Scout Bidco B.V., Delayed Draw Term Loan            
Schedule of Investments [Line Items]            
Total unfunded commitments 2,270 0 2,270 0    
Investment, Identifier [Axis]: Scout Bidco B.V., Revolver            
Schedule of Investments [Line Items]            
Total unfunded commitments 1,030 0 1,030 0    
Investment, Identifier [Axis]: Security Holdings B.V., Delayed Draw Term Loan            
Schedule of Investments [Line Items]            
Total unfunded commitments 2,134 2,274 2,134 2,274    
Investment, Identifier [Axis]: Security Holdings B.V., Revolver            
Schedule of Investments [Line Items]            
Total unfunded commitments 1,067 1,137 1,067 1,137    
Investment, Identifier [Axis]: Sereni Capital NV, Term Loan            
Schedule of Investments [Line Items]            
Total unfunded commitments 109 0 109 0    
Investment, Identifier [Axis]: Sierra Senior Loan Strategy JV LLC (Sierra JV)            
Schedule of Investments [Line Items]            
Total contributed capital 110,100   110,100      
Investment, Identifier [Axis]: Smartling, Inc., Delayed Draw Term Loan            
Schedule of Investments [Line Items]            
Total unfunded commitments 1,978 2,353 1,978 2,353    
Investment, Identifier [Axis]: Smartling, Inc., Revolver            
Schedule of Investments [Line Items]            
Total unfunded commitments 1,176 1,176 1,176 1,176    
Investment, Identifier [Axis]: Smile Brands Group, Inc., Delayed Draw Term Loan            
Schedule of Investments [Line Items]            
Total unfunded commitments 38 655 38 655    
Investment, Identifier [Axis]: Soho Square III Debtco II SARL, Delayed Draw Term Loan            
Schedule of Investments [Line Items]            
Total unfunded commitments 3,383 0 3,383 0    
Investment, Identifier [Axis]: Solo Buyer, L.P., Revolver            
Schedule of Investments [Line Items]            
Total unfunded commitments 1,995 0 1,995 0    
Investment, Identifier [Axis]: Sparus Holdings, LLC (f/k/a Sparus Holdings, Inc.), Delayed Draw Term Loan            
Schedule of Investments [Line Items]            
Total unfunded commitments 666 0 666 0    
Investment, Identifier [Axis]: Sparus Holdings, LLC (f/k/a Sparus Holdings, Inc.), Revolver            
Schedule of Investments [Line Items]            
Total unfunded commitments 156 0 156 0    
Investment, Identifier [Axis]: Spatial Business Systems LLC, Delayed Draw Term Loan            
Schedule of Investments [Line Items]            
Total unfunded commitments 7,500 0 7,500 0    
Investment, Identifier [Axis]: Spatial Business Systems LLC, Revolver            
Schedule of Investments [Line Items]            
Total unfunded commitments 1,406 0 1,406 0    
Investment, Identifier [Axis]: Springbrook Software (SBRK Intermediate, Inc.), Delayed Draw Term Loan            
Schedule of Investments [Line Items]            
Total unfunded commitments 0 2,373 0 2,373    
Investment, Identifier [Axis]: Superjet Buyer, LLC, Revolver            
Schedule of Investments [Line Items]            
Total unfunded commitments 1,825 1,825 1,825 1,825    
Investment, Identifier [Axis]: Syntax Systems Ltd, Delayed Draw Term Loan            
Schedule of Investments [Line Items]            
Total unfunded commitments 1,933 1,933 1,933 1,933    
Investment, Identifier [Axis]: Syntax Systems Ltd, Revolver            
Schedule of Investments [Line Items]            
Total unfunded commitments 337 569 337 569    
Investment, Identifier [Axis]: TSYL Corporate Buyer, Inc., Delayed Draw Term Loan            
Schedule of Investments [Line Items]            
Total unfunded commitments 1,681 0 1,681 0    
Investment, Identifier [Axis]: TSYL Corporate Buyer, Inc., Revolver            
Schedule of Investments [Line Items]            
Total unfunded commitments 177 0 177 0    
Investment, Identifier [Axis]: Tank Holding Corp, Revolver            
Schedule of Investments [Line Items]            
Total unfunded commitments 698 0 698 0    
Investment, Identifier [Axis]: Tanqueray Bidco Limited, Capex Facility            
Schedule of Investments [Line Items]            
Total unfunded commitments 1,088 0 1,088 0    
Investment, Identifier [Axis]: Techone B.V., Delayed Draw Term Loan            
Schedule of Investments [Line Items]            
Total unfunded commitments 0 1,621 0 1,621    
Investment, Identifier [Axis]: Techone B.V., Revolver            
Schedule of Investments [Line Items]            
Total unfunded commitments 203 432 203 432    
Investment, Identifier [Axis]: Tencarva Machinery Company, LLC, Delayed Draw Term Loan            
Schedule of Investments [Line Items]            
Total unfunded commitments 0 886 0 886    
Investment, Identifier [Axis]: Tencarva Machinery Company, LLC, Revolver            
Schedule of Investments [Line Items]            
Total unfunded commitments 1,129 1,129 1,129 1,129    
Investment, Identifier [Axis]: The Caprock Group, Inc. (aka TA/TCG Holdings, LLC), Delayed Draw Term Loan            
Schedule of Investments [Line Items]            
Total unfunded commitments 2,811 2,811 2,811 2,811    
Investment, Identifier [Axis]: The Caprock Group, Inc. (aka TA/TCG Holdings, LLC), Revolver            
Schedule of Investments [Line Items]            
Total unfunded commitments 827 827 827 827    
Investment, Identifier [Axis]: The Cleaver-Brooks Company, Inc., Revolver            
Schedule of Investments [Line Items]            
Total unfunded commitments 2,826 0 2,826 0    
Investment, Identifier [Axis]: The Hilb Group, LLC, Delayed Draw Term Loan            
Schedule of Investments [Line Items]            
Total unfunded commitments 1,182 2,773 1,182 2,773    
Investment, Identifier [Axis]: Thompson Rivers LLC            
Schedule of Investments [Line Items]            
Total contributed capital           $ 75,000
Investment, Identifier [Axis]: Thompsonn Rivers LLC            
Schedule of Investments [Line Items]            
Total contributed capital 79,411 79,414 79,411 79,414    
Total unfunded commitments 0 0 0 0    
Investment company, dividend reinvestment     4,400      
Investment, Identifier [Axis]: Thompsonn Rivers LLC | Affiliated Entity            
Schedule of Investments [Line Items]            
Investment company, dividend reinvestment     32,100 32,100    
Investment, Identifier [Axis]: Trader Corporation, Revolver            
Schedule of Investments [Line Items]            
Total unfunded commitments 345 0 345 0    
Investment, Identifier [Axis]: Transit Technologies LLC, Delayed Draw Term Loan            
Schedule of Investments [Line Items]            
Total unfunded commitments 0 1,857 0 1,857    
Investment, Identifier [Axis]: Truck-Lite Co., LLC, Delayed Draw Term Loan            
Schedule of Investments [Line Items]            
Total unfunded commitments 0 4,540 0 4,540    
Investment, Identifier [Axis]: Turbo Buyer, Inc., Delayed Draw Term Loan            
Schedule of Investments [Line Items]            
Total unfunded commitments 1,350 2,070 1,350 2,070    
Investment, Identifier [Axis]: USLS Acquisition, Inc., Delayed Draw Term Loan            
Schedule of Investments [Line Items]            
Total unfunded commitments 3,629 0 3,629 0    
Investment, Identifier [Axis]: Union Bidco Limited, Acquisition Facility            
Schedule of Investments [Line Items]            
Total unfunded commitments 78 0 78 0    
Investment, Identifier [Axis]: United Therapy Holding III GmbH, Acquisition Facility            
Schedule of Investments [Line Items]            
Total unfunded commitments 1,170 0 1,170 0    
Investment, Identifier [Axis]: W2O Holdings, Inc., Delayed Draw Term Loan            
Schedule of Investments [Line Items]            
Total unfunded commitments 2,622 3,832 2,622 3,832    
Investment, Identifier [Axis]: WWEC Holdings III CORP, Delayed Draw Term Loan            
Schedule of Investments [Line Items]            
Total unfunded commitments 3,106 0 3,106 0    
Investment, Identifier [Axis]: WWEC Holdings III CORP, Revolver            
Schedule of Investments [Line Items]            
Total unfunded commitments 1,366 0 1,366 0    
Investment, Identifier [Axis]: Waccamaw River LLC            
Schedule of Investments [Line Items]            
Total contributed capital 27,800 19,000 27,800 19,000 $ 25,000  
Total return of capital (recallable) (5,280) (5,280) (5,280) (5,280)    
Total unfunded commitments 2,480 11,280 2,480 11,280    
Investment, Identifier [Axis]: Waccamaw River LLC Capital Commitment - Funded            
Schedule of Investments [Line Items]            
Total contributed capital 22,500   22,500      
Investment, Identifier [Axis]: Waccamaw River, Joint Venture            
Schedule of Investments [Line Items]            
Total unfunded commitments 2,480 11,280 2,480 11,280    
Investment, Identifier [Axis]: Woodland Foods, Inc., Line of Credit            
Schedule of Investments [Line Items]            
Total unfunded commitments 456 2,070 456 2,070    
Investment, Identifier [Axis]: Xeinadin Bidco Limited, CAF Term Loan            
Schedule of Investments [Line Items]            
Total unfunded commitments 3,109 0 3,109 0    
Investment, Identifier [Axis]: ZB Holdco LLC, Delayed Draw Term Loan            
Schedule of Investments [Line Items]            
Total unfunded commitments 1,352 0 1,352 0    
Investment, Identifier [Axis]: ZB Holdco LLC, Revolver            
Schedule of Investments [Line Items]            
Total unfunded commitments 845 0 845 0    
Investment, Identifier [Axis]: Zeppelin Bidco Limited, Capex / Acquisition Facility            
Schedule of Investments [Line Items]            
Total unfunded commitments 2,516 0 2,516 0    
Investment, Identifier [Axis]: eShipping, LLC, Delayed Draw Term Loan            
Schedule of Investments [Line Items]            
Total unfunded commitments 1,650 2,548 1,650 2,548    
Investment, Identifier [Axis]: eShipping, LLC, Revolver            
Schedule of Investments [Line Items]            
Total unfunded commitments 1,486 1,232 1,486 1,232    
All Member Of Waccamaw River LLC            
Schedule of Investments [Line Items]            
Total contributed capital 125,000   125,000      
All Member Of Waccamaw River LLC | Investment, Identifier [Axis]: Waccamaw River LLC            
Schedule of Investments [Line Items]            
Total contributed capital 126,620 82,620 126,620 82,620    
Total return of capital (recallable) (14,020) (14,020) (14,020) (14,020)    
Total unfunded commitments 12,400 56,400 12,400 56,400    
All Member Of Waccamaw River LLC | Investment, Identifier [Axis]: Waccamaw River LLC | Affiliated Entity            
Schedule of Investments [Line Items]            
Total return of capital (recallable) (7,000)   (7,000)      
Total unfunded commitments 7,400 33,800 7,400 33,800    
Contributed capital by related parties 74,600 48,200        
All Member Of Waccamaw River LLC | Investment, Identifier [Axis]: Waccamaw River LLC Capital Commitment - Funded            
Schedule of Investments [Line Items]            
Total contributed capital 112,600   112,600      
All Members Of Thompson Rivers LLC | Investment, Identifier [Axis]: Thompsonn Rivers LLC            
Schedule of Investments [Line Items]            
Total contributed capital 482,083 482,120 482,083 482,120    
Total unfunded commitments 0 0 0 0    
All Members Of Thompson Rivers LLC | Investment, Identifier [Axis]: Thompsonn Rivers LLC | Affiliated Entity            
Schedule of Investments [Line Items]            
Investment company, dividend reinvestment     162,100 162,300    
All Members Of Jocassee Partners LLC | Investment, Identifier [Axis]: Jocassee Partners LLC            
Schedule of Investments [Line Items]            
Total contributed capital 385 330,000 385 330,000    
Total unfunded commitments $ 215 $ 220,000 $ 215 $ 220,000