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Investments - Capital and Unfunded Commitments (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Feb. 08, 2021
May 13, 2020
Schedule of Investments [Line Items]        
Total unfunded commitments $ 305,903 $ 308,532    
Affiliated Entity | Thompson Rivers LLC        
Schedule of Investments [Line Items]        
Investment company, dividend reinvestment 32,100 162,100    
Investment, Identifier [Axis]: Sinari Invest, Delayed Draw Term Loan        
Schedule of Investments [Line Items]        
Total unfunded commitments 617 0    
Investment, Identifier [Axis]: APC1 Holding, Delayed Draw Term Loan        
Schedule of Investments [Line Items]        
Total unfunded commitments 0 354    
Investment, Identifier [Axis]: ASC Communications, Revolver        
Schedule of Investments [Line Items]        
Total unfunded commitments 1,089 1,089    
Investment, Identifier [Axis]: ATL II MRO Holdings, Inc., Revolver        
Schedule of Investments [Line Items]        
Total unfunded commitments 1,667 1,667    
Investment, Identifier [Axis]: Accurus Aerospace Corporation, Revolver        
Schedule of Investments [Line Items]        
Total unfunded commitments 634 1,152    
Investment, Identifier [Axis]: Adhefin International, Delayed Draw Term Loan        
Schedule of Investments [Line Items]        
Total unfunded commitments 419 0    
Investment, Identifier [Axis]: AirX Climate Solutions, Inc, Delayed Draw Term Loan 1        
Schedule of Investments [Line Items]        
Total unfunded commitments 1,179 0    
Investment, Identifier [Axis]: AirX Climate Solutions, Inc, Revolver        
Schedule of Investments [Line Items]        
Total unfunded commitments 482 0    
Investment, Identifier [Axis]: AlliA Insurance Brokers NV, Delayed Draw Term Loan        
Schedule of Investments [Line Items]        
Total unfunded commitments 1,634 0    
Investment, Identifier [Axis]: Americo Chemical Products, LLC, Revolver        
Schedule of Investments [Line Items]        
Total unfunded commitments 471 0    
Investment, Identifier [Axis]: Amtech LLC, Delayed Draw Term Loan        
Schedule of Investments [Line Items]        
Total unfunded commitments 0 1,527    
Investment, Identifier [Axis]: Amtech LLC, Revolver        
Schedule of Investments [Line Items]        
Total unfunded commitments 436 545    
Investment, Identifier [Axis]: AnalytiChem Holding GmbH, Bridge Revolver        
Schedule of Investments [Line Items]        
Total unfunded commitments 0 366    
Investment, Identifier [Axis]: Anju Software, Inc, Delayed Draw Term Loan        
Schedule of Investments [Line Items]        
Total unfunded commitments 343 0    
Investment, Identifier [Axis]: Aquavista Watersides 2 LTD, Capex / Acquisition Facility        
Schedule of Investments [Line Items]        
Total unfunded commitments 2,221 2,543    
Investment, Identifier [Axis]: Arc Education, Delayed Draw Term Loan        
Schedule of Investments [Line Items]        
Total unfunded commitments 1,291 1,900    
Investment, Identifier [Axis]: Argus Bidco Limited, CAF Term Loan        
Schedule of Investments [Line Items]        
Total unfunded commitments 541 789    
Investment, Identifier [Axis]: Argus Bidco Limited, RCF Bridge Term Loan        
Schedule of Investments [Line Items]        
Total unfunded commitments 0 168    
Investment, Identifier [Axis]: Astra Bidco Limited, Delayed Draw Term Loan        
Schedule of Investments [Line Items]        
Total unfunded commitments 604 876    
Investment, Identifier [Axis]: Avance Clinical Bidco Pty Ltd, Delayed Draw Term Loan        
Schedule of Investments [Line Items]        
Total unfunded commitments 1,304 1,295    
Investment, Identifier [Axis]: Azalea Buyer, Inc., Delayed Draw Term Loan        
Schedule of Investments [Line Items]        
Total unfunded commitments 644 962    
Investment, Identifier [Axis]: Azalea Buyer, Inc., Revolver        
Schedule of Investments [Line Items]        
Total unfunded commitments 481 481    
Investment, Identifier [Axis]: Bariacum S.A, Acquisition Facility        
Schedule of Investments [Line Items]        
Total unfunded commitments 0 2,028    
Investment, Identifier [Axis]: Beyond Risk Management, Inc., Delayed Draw Term Loan        
Schedule of Investments [Line Items]        
Total unfunded commitments 2,007 2,423    
Investment, Identifier [Axis]: Biolam Group, Delayed Draw Term Loan        
Schedule of Investments [Line Items]        
Total unfunded commitments 667 4,783    
Investment, Identifier [Axis]: Black Angus Steakhouses, LLC, Delayed Draw Term Loan        
Schedule of Investments [Line Items]        
Total unfunded commitments 0 417    
Investment, Identifier [Axis]: Bounteous, Inc., Delayed Draw Term Loan        
Schedule of Investments [Line Items]        
Total unfunded commitments 2,840 2,840    
Investment, Identifier [Axis]: BrightSign LLC, Revolver        
Schedule of Investments [Line Items]        
Total unfunded commitments 443 1,329    
Investment, Identifier [Axis]: Brightpay Limited, Delayed Draw Term Loan        
Schedule of Investments [Line Items]        
Total unfunded commitments 140 135    
Investment, Identifier [Axis]: CAi Software, LLC, Revolver        
Schedule of Investments [Line Items]        
Total unfunded commitments 943 943    
Investment, Identifier [Axis]: CGI Parent, LLC, Revolver        
Schedule of Investments [Line Items]        
Total unfunded commitments 1,653 1,653    
Investment, Identifier [Axis]: CSL Dualcom, Capex / Acquisition Term Loan        
Schedule of Investments [Line Items]        
Total unfunded commitments 150 142    
Investment, Identifier [Axis]: Canadian Orthodontic Partners Corp., Delayed Draw Term Loan        
Schedule of Investments [Line Items]        
Total unfunded commitments 0 110    
Investment, Identifier [Axis]: Cascade Residential Services, LLC, Delayed Draw Term Loan        
Schedule of Investments [Line Items]        
Total unfunded commitments 1,985 0    
Investment, Identifier [Axis]: Cascade Residential Services, LLC, Revolver        
Schedule of Investments [Line Items]        
Total unfunded commitments 331 0    
Investment, Identifier [Axis]: Catawba River Limited, Structured Junior Note        
Schedule of Investments [Line Items]        
Total unfunded commitments 13,971 12,635    
Investment, Identifier [Axis]: Centralis Finco S.a.r.l., Incremental CAF Term Loan        
Schedule of Investments [Line Items]        
Total unfunded commitments 0 1,028    
Investment, Identifier [Axis]: Classic Collision (Summit Buyer, LLC), Delayed Draw Term Loan        
Schedule of Investments [Line Items]        
Total unfunded commitments 2,734 78    
Investment, Identifier [Axis]: Comply365, LLC, Revolver        
Schedule of Investments [Line Items]        
Total unfunded commitments 1,101 935    
Investment, Identifier [Axis]: Coyo Uprising GmbH, Delayed Draw Term Loan        
Schedule of Investments [Line Items]        
Total unfunded commitments 434 419    
Investment, Identifier [Axis]: DISA Holdings Corp., Delayed Draw Term Loan        
Schedule of Investments [Line Items]        
Total unfunded commitments 1,072 1,368    
Investment, Identifier [Axis]: DISA Holdings Corp., Revolver        
Schedule of Investments [Line Items]        
Total unfunded commitments 339 416    
Investment, Identifier [Axis]: DataServ Integrations, LLC, Revolver        
Schedule of Investments [Line Items]        
Total unfunded commitments 481 481    
Investment, Identifier [Axis]: DecksDirect, LLC, Revolver        
Schedule of Investments [Line Items]        
Total unfunded commitments 381 218    
Investment, Identifier [Axis]: DreamStart Bidco SAS (d/b/a SmartTrade), Acquisition Facility        
Schedule of Investments [Line Items]        
Total unfunded commitments 0 579    
Investment, Identifier [Axis]: Dune Group, Delayed Draw Term Loan        
Schedule of Investments [Line Items]        
Total unfunded commitments 439 624    
Investment, Identifier [Axis]: Dwyer Instruments, Inc., Delayed Draw Term Loan        
Schedule of Investments [Line Items]        
Total unfunded commitments 0 5,164    
Investment, Identifier [Axis]: EMI Porta Holdco LLC, Delayed Draw Term Loan        
Schedule of Investments [Line Items]        
Total unfunded commitments 0 9,272    
Investment, Identifier [Axis]: EMI Porta Holdco LLC, Revolver        
Schedule of Investments [Line Items]        
Total unfunded commitments 403 1,471    
Investment, Identifier [Axis]: EPS NASS Parent, Inc., Delayed Draw Term Loan        
Schedule of Investments [Line Items]        
Total unfunded commitments 0 257    
Investment, Identifier [Axis]: Eclipse Business Capital, LLC, Revolver        
Schedule of Investments [Line Items]        
Total unfunded commitments 17,182 17,455    
Investment, Identifier [Axis]: Eurofins Digital Testing International LUX Holding SARL, Delayed Draw Term Loan        
Schedule of Investments [Line Items]        
Total unfunded commitments 2,731 2,639    
Investment, Identifier [Axis]: Eurofins Digital Testing International LUX Holding SARL, Delayed Draw Term Loan1        
Schedule of Investments [Line Items]        
Total unfunded commitments 0 528    
Investment, Identifier [Axis]: Events Software BidCo Pty Ltd, Delayed Draw Term Loan        
Schedule of Investments [Line Items]        
Total unfunded commitments 620 640    
Investment, Identifier [Axis]: Express Wash Acquisition Company, LLC, Revolver        
Schedule of Investments [Line Items]        
Total unfunded commitments 115 115    
Investment, Identifier [Axis]: F24 (Stairway BidCo GmbH), Acquisition Term Loan        
Schedule of Investments [Line Items]        
Total unfunded commitments 0 246    
Investment, Identifier [Axis]: Faraday, Delayed Draw Term Loan        
Schedule of Investments [Line Items]        
Total unfunded commitments 990 0    
Investment, Identifier [Axis]: Fineline Technologies, Inc., Delayed Draw Term Loan        
Schedule of Investments [Line Items]        
Total unfunded commitments 0 180    
Investment, Identifier [Axis]: Finexvet, Delayed Draw Term Loan        
Schedule of Investments [Line Items]        
Total unfunded commitments 650 0    
Investment, Identifier [Axis]: Footco 40 Limited, Delayed Draw Term Loan        
Schedule of Investments [Line Items]        
Total unfunded commitments 524 766    
Investment, Identifier [Axis]: Fortis Payment Systems, LLC, Delayed Draw Term Loan        
Schedule of Investments [Line Items]        
Total unfunded commitments 0 925    
Investment, Identifier [Axis]: FragilePak LLC, Delayed Draw Term Loan        
Schedule of Investments [Line Items]        
Total unfunded commitments 0 2,354    
Investment, Identifier [Axis]: GB EAGLE BUYER, INC., Revolver        
Schedule of Investments [Line Items]        
Total unfunded commitments 2,581 2,581    
Investment, Identifier [Axis]: GPZN II GmbH, CAF Term Loan        
Schedule of Investments [Line Items]        
Total unfunded commitments 0 560    
Investment, Identifier [Axis]: GPZN II GmbH, Delayed Draw Term Loan        
Schedule of Investments [Line Items]        
Total unfunded commitments 53 0    
Investment, Identifier [Axis]: GROUPE PRODUCT LIFE, Delayed Draw Term Loan        
Schedule of Investments [Line Items]        
Total unfunded commitments 0 441    
Investment, Identifier [Axis]: Global Academic Group Limited, Term Loan        
Schedule of Investments [Line Items]        
Total unfunded commitments 414 451    
Investment, Identifier [Axis]: Greenhill BV, Capex Acquisition Facility        
Schedule of Investments [Line Items]        
Total unfunded commitments 120 255    
Investment, Identifier [Axis]: Gusto Aus BidCo Pty Ltd, Delayed Draw Term Loan        
Schedule of Investments [Line Items]        
Total unfunded commitments 167 223    
Investment, Identifier [Axis]: HEKA INVEST, Delayed Draw Term Loan        
Schedule of Investments [Line Items]        
Total unfunded commitments 575 555    
Investment, Identifier [Axis]: HTI Technology & Industries, Delayed Draw Term Loan        
Schedule of Investments [Line Items]        
Total unfunded commitments 2,045 2,045    
Investment, Identifier [Axis]: HTI Technology & Industries, Revolver        
Schedule of Investments [Line Items]        
Total unfunded commitments 1,364 1,364    
Investment, Identifier [Axis]: HW Holdco, LLC (Hanley Wood LLC), Delayed Draw Term Loan        
Schedule of Investments [Line Items]        
Total unfunded commitments 0 913    
Investment, Identifier [Axis]: HeartHealth Bidco Pty Ltd, Delayed Draw Term Loan        
Schedule of Investments [Line Items]        
Total unfunded commitments 253 313    
Investment, Identifier [Axis]: Heartland Veterinary Partners, LLC, Delayed Draw Term Loan        
Schedule of Investments [Line Items]        
Total unfunded commitments 0 267    
Investment, Identifier [Axis]: Heavy Construction Systems Specialists, LLC, Revolver        
Schedule of Investments [Line Items]        
Total unfunded commitments 2,632 2,632    
Investment, Identifier [Axis]: HemaSource, Inc, Revolver        
Schedule of Investments [Line Items]        
Total unfunded commitments 1,421 0    
Investment, Identifier [Axis]: HomeX Services Group, LLC, Delayed Draw Term Loan        
Schedule of Investments [Line Items]        
Total unfunded commitments 845 0    
Investment, Identifier [Axis]: HomeX Services Group, LLC, Revolver        
Schedule of Investments [Line Items]        
Total unfunded commitments 338 0    
Investment, Identifier [Axis]: INOS 19-090 GmbH, Acquisition Facility        
Schedule of Investments [Line Items]        
Total unfunded commitments 1,872 2,380    
Investment, Identifier [Axis]: ISTO Technologies II, LLC, Revolver        
Schedule of Investments [Line Items]        
Total unfunded commitments 714 0    
Investment, Identifier [Axis]: ITI Intermodal, Inc., Delayed Draw Term Loan        
Schedule of Investments [Line Items]        
Total unfunded commitments 0 103    
Investment, Identifier [Axis]: ITI Intermodal, Inc., Revolver        
Schedule of Investments [Line Items]        
Total unfunded commitments 1,157 118    
Investment, Identifier [Axis]: Innovad Group II BV, Delayed Draw Term Loan        
Schedule of Investments [Line Items]        
Total unfunded commitments 266 1,261    
Investment, Identifier [Axis]: Interstellar Group B.V., Delayed Draw Term Loan 1        
Schedule of Investments [Line Items]        
Total unfunded commitments 620 1,310    
Investment, Identifier [Axis]: Interstellar Group B.V., Delayed Draw Term Loan 2        
Schedule of Investments [Line Items]        
Total unfunded commitments 57 55    
Investment, Identifier [Axis]: InvoCare Limited, Delayed Draw Term Loan        
Schedule of Investments [Line Items]        
Total unfunded commitments 387 0    
Investment, Identifier [Axis]: Isolstar Holding NV (IPCOM), Delayed Draw Term Loan        
Schedule of Investments [Line Items]        
Total unfunded commitments 656 744    
Investment, Identifier [Axis]: Jaguar Merger Sub Inc., Delayed Draw Term Loan        
Schedule of Investments [Line Items]        
Total unfunded commitments 0 422    
Investment, Identifier [Axis]: Jaguar Merger Sub Inc., Revolver        
Schedule of Investments [Line Items]        
Total unfunded commitments 0 490    
Investment, Identifier [Axis]: Jocassee Partners LLC        
Schedule of Investments [Line Items]        
Total contributed capital 35 35,000    
Total unfunded commitments 65 65,000    
Investment, Identifier [Axis]: Jocassee Partners LLC | All Members Of Jocassee Partners LLC        
Schedule of Investments [Line Items]        
Total contributed capital 385 385,000    
Total unfunded commitments 215 215,000    
Investment, Identifier [Axis]: Jocassee Partners LLC, Joint Venture        
Schedule of Investments [Line Items]        
Total unfunded commitments 65,000 65,000    
Investment, Identifier [Axis]: Jon Bidco Limited, Capex & Acquisition Facility        
Schedule of Investments [Line Items]        
Total unfunded commitments 1,125 1,441    
Investment, Identifier [Axis]: Jones Fish Hatcheries & Distributors LLC, Revolver        
Schedule of Investments [Line Items]        
Total unfunded commitments 418 418    
Investment, Identifier [Axis]: Kano Laboratories LLC, Delayed Draw Term Loan 1        
Schedule of Investments [Line Items]        
Total unfunded commitments 153 153    
Investment, Identifier [Axis]: Kano Laboratories LLC, Delayed Draw Term Loan 2        
Schedule of Investments [Line Items]        
Total unfunded commitments 2,830 2,830    
Investment, Identifier [Axis]: Kemmerer Operations, LLC, Delayed Draw Term Loan        
Schedule of Investments [Line Items]        
Total unfunded commitments 0 908    
Investment, Identifier [Axis]: Lambir Bidco Limited, Delayed Draw Term Loan        
Schedule of Investments [Line Items]        
Total unfunded commitments 626 1,766    
Investment, Identifier [Axis]: Lattice Group Holdings Bidco Limited, Delayed Draw Term Loan        
Schedule of Investments [Line Items]        
Total unfunded commitments 255 298    
Investment, Identifier [Axis]: Lattice Group Holdings Bidco Limited, Revolver        
Schedule of Investments [Line Items]        
Total unfunded commitments 18 0    
Investment, Identifier [Axis]: LeadsOnline, LLC, Revolver        
Schedule of Investments [Line Items]        
Total unfunded commitments 2,187 2,603    
Investment, Identifier [Axis]: Lifestyle Intermediate II, LLC, Revolver        
Schedule of Investments [Line Items]        
Total unfunded commitments 2,500 2,500    
Investment, Identifier [Axis]: LivTech Purchaser, Inc., Delayed Draw Term Loan        
Schedule of Investments [Line Items]        
Total unfunded commitments 0 138    
Investment, Identifier [Axis]: MC Group Ventures Corporation, Delayed Draw Term Loan        
Schedule of Investments [Line Items]        
Total unfunded commitments 276 296    
Investment, Identifier [Axis]: Marmoutier Holding B.V., Delayed Draw Term Loan        
Schedule of Investments [Line Items]        
Total unfunded commitments 18 24    
Investment, Identifier [Axis]: Marmoutier Holding B.V., Revolver        
Schedule of Investments [Line Items]        
Total unfunded commitments 109 106    
Investment, Identifier [Axis]: Marshall Excelsior Co., Revolver        
Schedule of Investments [Line Items]        
Total unfunded commitments 221 413    
Investment, Identifier [Axis]: Mercell Holding AS, Capex Acquisition Facility        
Schedule of Investments [Line Items]        
Total unfunded commitments 773 797    
Investment, Identifier [Axis]: Modern Star Holdings Bidco Pty Limited, Term Loan        
Schedule of Investments [Line Items]        
Total unfunded commitments 974 968    
Investment, Identifier [Axis]: Moonlight Bidco Limited, Delayed Draw Term Loan        
Schedule of Investments [Line Items]        
Total unfunded commitments 562 0    
Investment, Identifier [Axis]: Murphy Midco Limited, Delayed Draw Term Loan 1        
Schedule of Investments [Line Items]        
Total unfunded commitments 0 407    
Investment, Identifier [Axis]: NAW Buyer, LLC, Delayed Draw Term Loan        
Schedule of Investments [Line Items]        
Total unfunded commitments 5,876 0    
Investment, Identifier [Axis]: NAW Buyer, LLC, Revolver        
Schedule of Investments [Line Items]        
Total unfunded commitments 1,515 0    
Investment, Identifier [Axis]: NF Holdco, LLC, Revolver        
Schedule of Investments [Line Items]        
Total unfunded commitments 663 0    
Investment, Identifier [Axis]: NPM Investments 28 B.V., Delayed Draw Term Loan        
Schedule of Investments [Line Items]        
Total unfunded commitments 479 463    
Investment, Identifier [Axis]: Narda Acquisitionco., Inc., Revolver        
Schedule of Investments [Line Items]        
Total unfunded commitments 1,311 1,180    
Investment, Identifier [Axis]: NeoxCo, Delayed Draw Term Loan        
Schedule of Investments [Line Items]        
Total unfunded commitments 497 0    
Investment, Identifier [Axis]: Next Holdco, LLC, Delayed Draw Term Loan        
Schedule of Investments [Line Items]        
Total unfunded commitments 1,891 0    
Investment, Identifier [Axis]: Next Holdco, LLC,Revolver        
Schedule of Investments [Line Items]        
Total unfunded commitments 733 0    
Investment, Identifier [Axis]: Nexus Underwriting Management Limited, Acquisition Facility        
Schedule of Investments [Line Items]        
Total unfunded commitments 0 443    
Investment, Identifier [Axis]: Novotech Aus Bidco Pty Ltd, Capex & Acquisition Facility        
Schedule of Investments [Line Items]        
Total unfunded commitments 809 809    
Investment, Identifier [Axis]: OA Buyer, Inc., Revolver        
Schedule of Investments [Line Items]        
Total unfunded commitments 1,331 1,331    
Investment, Identifier [Axis]: OAC Holdings I Corp., Revolver        
Schedule of Investments [Line Items]        
Total unfunded commitments 1,370 607    
Investment, Identifier [Axis]: OSP Hamilton Purchaser, LLC, Delayed Draw Term Loan        
Schedule of Investments [Line Items]        
Total unfunded commitments 5,345 0    
Investment, Identifier [Axis]: OSP Hamilton Purchaser, LLC, Revolver        
Schedule of Investments [Line Items]        
Total unfunded commitments 1,109 187    
Investment, Identifier [Axis]: Omni Intermediate Holdings, LLC, Delayed Draw Term Loan 2        
Schedule of Investments [Line Items]        
Total unfunded commitments 0 2,289    
Investment, Identifier [Axis]: PDQ.Com Corporation, Delayed Draw Term Loan 1        
Schedule of Investments [Line Items]        
Total unfunded commitments 1,970 0    
Investment, Identifier [Axis]: PDQ.Com Corporation, Delayed Draw Term Loan 2        
Schedule of Investments [Line Items]        
Total unfunded commitments 4,807 6,885    
Investment, Identifier [Axis]: PSP Intermediate 4, L.L.C., Delayed Draw Term Loan        
Schedule of Investments [Line Items]        
Total unfunded commitments 206 727    
Investment, Identifier [Axis]: Pacific Health Supplies Bidco Pty Limited, CapEx Term Loan        
Schedule of Investments [Line Items]        
Total unfunded commitments 328 0    
Investment, Identifier [Axis]: Polara Enterprises, L.L.C., Revolver        
Schedule of Investments [Line Items]        
Total unfunded commitments 545 545    
Investment, Identifier [Axis]: Premium Invest, Acquisition Facility        
Schedule of Investments [Line Items]        
Total unfunded commitments 1,712 0    
Investment, Identifier [Axis]: Premium Invest, Delayed Draw Term Loan        
Schedule of Investments [Line Items]        
Total unfunded commitments 0 2,882    
Investment, Identifier [Axis]: Process Insights Acquisition, Inc, Delayed Draw Term Loan        
Schedule of Investments [Line Items]        
Total unfunded commitments 935 0    
Investment, Identifier [Axis]: Process Insights Acquisition, Inc, Revolver        
Schedule of Investments [Line Items]        
Total unfunded commitments 1,014 0    
Investment, Identifier [Axis]: Profit Optics, LLC, Revolver        
Schedule of Investments [Line Items]        
Total unfunded commitments 210 484    
Investment, Identifier [Axis]: Protego Bidco B.V., Delayed Draw Term Loan        
Schedule of Investments [Line Items]        
Total unfunded commitments 656 792    
Investment, Identifier [Axis]: Qualified Industries, LLC, Revolver        
Schedule of Investments [Line Items]        
Total unfunded commitments 242 0    
Investment, Identifier [Axis]: R1 Holdings, LLC, Delayed Draw Term Loan        
Schedule of Investments [Line Items]        
Total unfunded commitments 1,682 2,623    
Investment, Identifier [Axis]: R1 Holdings, LLC, Revolver        
Schedule of Investments [Line Items]        
Total unfunded commitments 1,947 1,601    
Investment, Identifier [Axis]: RA Outdoors, LLC, Revolver        
Schedule of Investments [Line Items]        
Total unfunded commitments 438 1,235    
Investment, Identifier [Axis]: RTIC Subsidiary Holdings, LLC, Revolver        
Schedule of Investments [Line Items]        
Total unfunded commitments 3,333 2,381    
Investment, Identifier [Axis]: Randys Holdings, Inc., Delayed Draw Term Loan        
Schedule of Investments [Line Items]        
Total unfunded commitments 3,412 4,412    
Investment, Identifier [Axis]: Randys Holdings, Inc., Revolver        
Schedule of Investments [Line Items]        
Total unfunded commitments 1,326 1,571    
Investment, Identifier [Axis]: Rep Seko Merger Sub LLC, Delayed Draw Term Loan        
Schedule of Investments [Line Items]        
Total unfunded commitments 0 725    
Investment, Identifier [Axis]: Reward Gateway (UK) Ltd, Acquisition Facility        
Schedule of Investments [Line Items]        
Total unfunded commitments 0 600    
Investment, Identifier [Axis]: Rhondda Financing No. 1 DAC, Structured Junior Note        
Schedule of Investments [Line Items]        
Total unfunded commitments 4,707 0    
Investment, Identifier [Axis]: Rocade Holdings LLC        
Schedule of Investments [Line Items]        
Total unfunded commitments 17,500      
Investment, Identifier [Axis]: Rocade Holdings LLC, Preferred Equity        
Schedule of Investments [Line Items]        
Total unfunded commitments 17,500 0    
Investment, Identifier [Axis]: Rock Labor,Revolver        
Schedule of Investments [Line Items]        
Total unfunded commitments 1,103 0    
Investment, Identifier [Axis]: Royal Buyer, LLC, Delayed Draw Term Loan        
Schedule of Investments [Line Items]        
Total unfunded commitments 922 2,209    
Investment, Identifier [Axis]: Royal Buyer, LLC, Revolver        
Schedule of Investments [Line Items]        
Total unfunded commitments 1,340 1,340    
Investment, Identifier [Axis]: SBP Holdings LP, Delayed Draw Term Loan        
Schedule of Investments [Line Items]        
Total unfunded commitments 151 0    
Investment, Identifier [Axis]: SBP Holdings LP, Revolver        
Schedule of Investments [Line Items]        
Total unfunded commitments 1,065 0    
Investment, Identifier [Axis]: SISU ACQUISITIONCO., INC, Delayed Draw Term Loan        
Schedule of Investments [Line Items]        
Total unfunded commitments 1,007 0    
Investment, Identifier [Axis]: SSCP Pegasus Midco Limited, Delayed Draw Term Loan        
Schedule of Investments [Line Items]        
Total unfunded commitments 4,119 4,664    
Investment, Identifier [Axis]: Sanoptis S.A.R.L., Acquisition Capex Facility        
Schedule of Investments [Line Items]        
Total unfunded commitments 16 1,751    
Investment, Identifier [Axis]: Sanoptis S.A.R.L.,CAF Term Loan        
Schedule of Investments [Line Items]        
Total unfunded commitments 1,458 0    
Investment, Identifier [Axis]: Scaled Agile, Inc., Delayed Draw Term Loan        
Schedule of Investments [Line Items]        
Total unfunded commitments 0 416    
Investment, Identifier [Axis]: Scaled Agile, Inc., Revolver        
Schedule of Investments [Line Items]        
Total unfunded commitments 280 336    
Investment, Identifier [Axis]: Scout Bidco B.V., Delayed Draw Term Loan        
Schedule of Investments [Line Items]        
Total unfunded commitments 0 2,270    
Investment, Identifier [Axis]: Scout Bidco B.V., Revolver        
Schedule of Investments [Line Items]        
Total unfunded commitments 640 1,030    
Investment, Identifier [Axis]: Security Holdings B.V., Delayed Draw Term Loan        
Schedule of Investments [Line Items]        
Total unfunded commitments 2,209 2,134    
Investment, Identifier [Axis]: Security Holdings B.V., Revolver        
Schedule of Investments [Line Items]        
Total unfunded commitments 1,105 1,067    
Investment, Identifier [Axis]: Sereni Capital NV, Term Loan        
Schedule of Investments [Line Items]        
Total unfunded commitments 0 109    
Investment, Identifier [Axis]: Sierra Senior Loan Strategy JV LLC (Sierra JV)        
Schedule of Investments [Line Items]        
Total contributed capital 110,100      
Investment, Identifier [Axis]: SmartShift Group, Inc ,Delayed Draw Term Loan        
Schedule of Investments [Line Items]        
Total unfunded commitments 3,440 0    
Investment, Identifier [Axis]: SmartShift Group, Inc, Revolver        
Schedule of Investments [Line Items]        
Total unfunded commitments 1,651 0    
Investment, Identifier [Axis]: Smartling, Inc., Delayed Draw Term Loan        
Schedule of Investments [Line Items]        
Total unfunded commitments 0 1,978    
Investment, Identifier [Axis]: Smartling, Inc., Revolver        
Schedule of Investments [Line Items]        
Total unfunded commitments 1,176 1,176    
Investment, Identifier [Axis]: Smile Brands Group, Inc., Delayed Draw Term Loan        
Schedule of Investments [Line Items]        
Total unfunded commitments 0 38    
Investment, Identifier [Axis]: Soho Square III Debtco II SARL, Delayed Draw Term Loan        
Schedule of Investments [Line Items]        
Total unfunded commitments 0 3,383    
Investment, Identifier [Axis]: Solo Buyer, L.P., Revolver        
Schedule of Investments [Line Items]        
Total unfunded commitments 1,330 1,995    
Investment, Identifier [Axis]: Sparus Holdings, LLC (f/k/a Sparus Holdings, Inc.), Delayed Draw Term Loan        
Schedule of Investments [Line Items]        
Total unfunded commitments 399 666    
Investment, Identifier [Axis]: Sparus Holdings, LLC (f/k/a Sparus Holdings, Inc.), Revolver        
Schedule of Investments [Line Items]        
Total unfunded commitments 90 156    
Investment, Identifier [Axis]: Spatial Business Systems LLC, Delayed Draw Term Loan        
Schedule of Investments [Line Items]        
Total unfunded commitments 1,875 7,500    
Investment, Identifier [Axis]: Spatial Business Systems LLC, Revolver        
Schedule of Investments [Line Items]        
Total unfunded commitments 1,406 1,406    
Investment, Identifier [Axis]: Superjet Buyer, LLC, Revolver        
Schedule of Investments [Line Items]        
Total unfunded commitments 1,369 1,825    
Investment, Identifier [Axis]: Syntax Systems Ltd, Delayed Draw Term Loan        
Schedule of Investments [Line Items]        
Total unfunded commitments 0 1,933    
Investment, Identifier [Axis]: Syntax Systems Ltd, Revolver        
Schedule of Investments [Line Items]        
Total unfunded commitments 391 337    
Investment, Identifier [Axis]: TSYL Corporate Buyer, Inc., Delayed Draw Term Loan        
Schedule of Investments [Line Items]        
Total unfunded commitments 2,244 0    
Investment, Identifier [Axis]: TSYL Corporate Buyer, Inc., Delayed Draw Term Loan 1        
Schedule of Investments [Line Items]        
Total unfunded commitments 1,469 1,681    
Investment, Identifier [Axis]: TSYL Corporate Buyer, Inc., Revolver        
Schedule of Investments [Line Items]        
Total unfunded commitments 642 177    
Investment, Identifier [Axis]: Tank Holding Corp, Delayed Draw Term Loan        
Schedule of Investments [Line Items]        
Total unfunded commitments 614 0    
Investment, Identifier [Axis]: Tank Holding Corp, Revolver        
Schedule of Investments [Line Items]        
Total unfunded commitments 640 698    
Investment, Identifier [Axis]: Tanqueray Bidco Limited, Capex Facility        
Schedule of Investments [Line Items]        
Total unfunded commitments 1,153 1,088    
Investment, Identifier [Axis]: Techone B.V., Revolver        
Schedule of Investments [Line Items]        
Total unfunded commitments 315 203    
Investment, Identifier [Axis]: Tencarva Machinery Company, LLC, Revolver        
Schedule of Investments [Line Items]        
Total unfunded commitments 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 1,825 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    
Investment, Identifier [Axis]: The Cleaver-Brooks Company, Inc., Revolver        
Schedule of Investments [Line Items]        
Total unfunded commitments 3,229 2,826    
Investment, Identifier [Axis]: The Hilb Group, LLC, Delayed Draw Term Loan        
Schedule of Investments [Line Items]        
Total unfunded commitments 313 1,182    
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 79,411    
Total unfunded commitments 0 0    
Investment company, dividend reinvestment 4,400      
Investment, Identifier [Axis]: Thompsonn Rivers LLC | All Members Of Thompson Rivers LLC        
Schedule of Investments [Line Items]        
Total contributed capital 482,083 482,083    
Total unfunded commitments 0 0    
Investment, Identifier [Axis]: Trader Corporation, Revolver        
Schedule of Investments [Line Items]        
Total unfunded commitments 354 345    
Investment, Identifier [Axis]: Trintech, Inc, Delayed Draw Term Loan        
Schedule of Investments [Line Items]        
Total unfunded commitments 383 0    
Investment, Identifier [Axis]: Turbo Buyer, Inc., Delayed Draw Term Loan        
Schedule of Investments [Line Items]        
Total unfunded commitments 1,350 1,350    
Investment, Identifier [Axis]: UBC Ledgers Holding AB, Delayed Draw Term Loan        
Schedule of Investments [Line Items]        
Total unfunded commitments 840 0    
Investment, Identifier [Axis]: UBC Ledgers Holding AB, Revolver        
Schedule of Investments [Line Items]        
Total unfunded commitments 278 0    
Investment, Identifier [Axis]: USLS Acquisition, Inc. (f/k/a US Legal Support, Inc.), Delayed Draw Term Loan        
Schedule of Investments [Line Items]        
Total unfunded commitments 2,540 3,629    
Investment, Identifier [Axis]: Union Bidco Limited, Acquisition Facility        
Schedule of Investments [Line Items]        
Total unfunded commitments 83 78    
Investment, Identifier [Axis]: United Therapy Holding III GmbH, Acquisition Facility        
Schedule of Investments [Line Items]        
Total unfunded commitments 683 1,170    
Investment, Identifier [Axis]: Unither (Uniholding), Delayed Draw Term Loan        
Schedule of Investments [Line Items]        
Total unfunded commitments 479 0    
Investment, Identifier [Axis]: W2O Holdings, Inc., Delayed Draw Term Loan        
Schedule of Investments [Line Items]        
Total unfunded commitments 0 2,622    
Investment, Identifier [Axis]: WWEC Holdings III CORP, Delayed Draw Term Loan        
Schedule of Investments [Line Items]        
Total unfunded commitments 0 3,106    
Investment, Identifier [Axis]: WWEC Holdings III CORP, Revolver        
Schedule of Investments [Line Items]        
Total unfunded commitments 2,019 1,366    
Investment, Identifier [Axis]: Waccamaw River LLC        
Schedule of Investments [Line Items]        
Total contributed capital 30,280 27,800 $ 25,000  
Total return of capital (recallable) 0 (5,280) $ (5,300)  
Total unfunded commitments 0 2,480    
Investment, Identifier [Axis]: Waccamaw River LLC | All Member Of Waccamaw River LLC        
Schedule of Investments [Line Items]        
Total contributed capital 139,020 126,620    
Total return of capital (recallable) 0 (14,020)    
Total unfunded commitments 0 12,400    
Investment, Identifier [Axis]: Waccamaw River, Joint Venture        
Schedule of Investments [Line Items]        
Total unfunded commitments 0 2,480    
Investment, Identifier [Axis]: West-NR AcquisitionCo, Delayed Draw Term Loan        
Schedule of Investments [Line Items]        
Total unfunded commitments 2,500 0    
Investment, Identifier [Axis]: Whitcraft Holdings, Inc, Revolver        
Schedule of Investments [Line Items]        
Total unfunded commitments 1,760 0    
Investment, Identifier [Axis]: White Bidco Limited, Delayed Draw Term Loan        
Schedule of Investments [Line Items]        
Total unfunded commitments 514 0    
Investment, Identifier [Axis]: Woodland Foods, Inc., Line of Credit        
Schedule of Investments [Line Items]        
Total unfunded commitments 680 456    
Investment, Identifier [Axis]: Xeinadin Bidco Limited, CAF Term Loan        
Schedule of Investments [Line Items]        
Total unfunded commitments 2,704 3,109    
Investment, Identifier [Axis]: ZB Holdco LLC, Delayed Draw Term Loan        
Schedule of Investments [Line Items]        
Total unfunded commitments 2,932 1,352    
Investment, Identifier [Axis]: ZB Holdco LLC, Revolver        
Schedule of Investments [Line Items]        
Total unfunded commitments 845 845    
Investment, Identifier [Axis]: Zeppelin Bidco Limited, Capex / Acquisition Facility        
Schedule of Investments [Line Items]        
Total unfunded commitments 2,667 2,516    
Investment, Identifier [Axis]: eShipping, LLC, Delayed Draw Term Loan        
Schedule of Investments [Line Items]        
Total unfunded commitments 0 1,650    
Investment, Identifier [Axis]: eShipping, LLC, Revolver        
Schedule of Investments [Line Items]        
Total unfunded commitments 1,486 1,486    
All Member Of Waccamaw River LLC        
Schedule of Investments [Line Items]        
Total contributed capital 125,000      
Total return of capital (recallable) (14,000)      
All Member Of Waccamaw River LLC | Affiliated Entity | Waccamaw River, LLC        
Schedule of Investments [Line Items]        
Total return of capital (recallable) (7,000) (7,000)    
Total unfunded commitments 7,400 7,400    
Contributed capital by related parties $ 82,000 $ 74,600