Commitments and Contingencies - Summary of Unfunded Commitments under Loan and Financing Agreements (Details) - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
Other Commitments [Line Items]
Unfunded Commitments	$ 307,300	$ 234,000
Commitments to Extend Credit [Member]
Other Commitments [Line Items]
Unfunded Commitments	307,312	234,031
First Lien Senior Secured Loan | Access
Other Commitments [Line Items]
Unfunded Commitments	7,313
First Lien Senior Secured Loan | Caribou Bidco Limited
Other Commitments [Line Items]
Unfunded Commitments	19
First Lien Senior Secured Loan | DC Blox Inc.
Other Commitments [Line Items]
Unfunded Commitments	5,391	12,781
First Lien Senior Secured Loan | iBanFirst
Other Commitments [Line Items]
Unfunded Commitments	2,941
First Lien Senior Secured Loan | MRHT Acquisition Facility
Other Commitments [Line Items]
Unfunded Commitments	7,974	569
First Lien Senior Secured Loan | Omni Intermediate DD
Other Commitments [Line Items]
Unfunded Commitments		870
First Lien Senior Secured Loan | Parcel2Go Acquisition Facility
Other Commitments [Line Items]
Unfunded Commitments	31
First Lien Senior Secured Loan | Reconomy
Other Commitments [Line Items]
Unfunded Commitments	7,348
First Lien Senior Secured Loan | WSP Initial Term Loan
Other Commitments [Line Items]
Unfunded Commitments		1,797
First Lien Senior Secured Loan | WU Holdco, Inc.
Other Commitments [Line Items]
Unfunded Commitments		1,708
First Lien Senior Secured Loan | Armstrong Bidco T/L
Other Commitments [Line Items]
Unfunded Commitments		6,542
Delayed Draw | Abracon Group Holding, LLC
Other Commitments [Line Items]
Unfunded Commitments	5,046
Delayed Draw | Allworth Financial Group, L.P
Other Commitments [Line Items]
Unfunded Commitments	5	507
Delayed Draw | Apollo Intelligence
Other Commitments [Line Items]
Unfunded Commitments	9,611
Delayed Draw | Concert Golf Partners Holdco DD T/L
Other Commitments [Line Items]
Unfunded Commitments	3,132
Delayed Draw | Direct Travel, Inc.
Other Commitments [Line Items]
Unfunded Commitments	2,625	2,625
Delayed Draw | Meriplex Communications Ltd.
Other Commitments [Line Items]
Unfunded Commitments	9,882
Delayed Draw | Morrow Sodali
Other Commitments [Line Items]
Unfunded Commitments	2,659
Delayed Draw | New Look (Delaware) Corporation
Other Commitments [Line Items]
Unfunded Commitments	1,938	2,005
Delayed Draw | New Look Vision Group
Other Commitments [Line Items]
Unfunded Commitments	66	3,803
Delayed Draw | OGH Bidco Limited
Other Commitments [Line Items]
Unfunded Commitments	6,877
Delayed Draw | Omni Intermediate R/C
Other Commitments [Line Items]
Unfunded Commitments	504
Delayed Draw | Paisley Bidco Limited
Other Commitments [Line Items]
Unfunded Commitments		8,624
Delayed Draw | Premier Imaging, LLC - Delayed Draw
Other Commitments [Line Items]
Unfunded Commitments	4,816
Delayed Draw | Revalize, Inc.
Other Commitments [Line Items]
Unfunded Commitments	13,114	13,395
Delayed Draw | Saltoun
Other Commitments [Line Items]
Unfunded Commitments	14,358
Delayed Draw | Spring Finco BV
Other Commitments [Line Items]
Unfunded Commitments	1,134
Delayed Draw | Superna Inc.
Other Commitments [Line Items]
Unfunded Commitments	2,631
Delayed Draw | Titan Cloud Software, Inc
Other Commitments [Line Items]
Unfunded Commitments	11,429
Delayed Draw | TLC Purchaser, Inc.
Other Commitments [Line Items]
Unfunded Commitments	7,616	7,119
Delayed Draw | WCI Gigawatt Purchaser DD T/L
Other Commitments [Line Items]
Unfunded Commitments	1,609	1,646
Delayed Draw | WSP Initial Term Loan
Other Commitments [Line Items]
Unfunded Commitments	1,797
Delayed Draw | Opus2
Other Commitments [Line Items]
Unfunded Commitments		7,382
Revolver | 9 Story Media Group Inc.
Other Commitments [Line Items]
Unfunded Commitments	487	1
Revolver | A&R Logistics, Inc.
Other Commitments [Line Items]
Unfunded Commitments	4,030	3,281
Revolver | Abracon Group Holding, LLC
Other Commitments [Line Items]
Unfunded Commitments	2,018	2,833
Revolver | Allworth Financial Group, L.P
Other Commitments [Line Items]
Unfunded Commitments	2,440	2,440
Revolver | Amspec Services, Inc
Other Commitments [Line Items]
Unfunded Commitments	5,100	4,179
Revolver | Ansira Holdings, Inc.
Other Commitments [Line Items]
Unfunded Commitments	1,700	1,700
Revolver | Apollo Intelligence
Other Commitments [Line Items]
Unfunded Commitments	7,208
Revolver | Applitools
Other Commitments [Line Items]
Unfunded Commitments	3,430
Revolver | Appriss Holdings, Inc.
Other Commitments [Line Items]
Unfunded Commitments	753	753
Revolver | Aramsco, Inc.
Other Commitments [Line Items]
Unfunded Commitments	3,161	3,387
Revolver | ASP-r-pac Acquisition Co LLC
Other Commitments [Line Items]
Unfunded Commitments	3,253	2,603
Revolver | Avalon Acquiror, Inc.
Other Commitments [Line Items]
Unfunded Commitments	7,353
Revolver | Batteries Plus Holding Corporation
Other Commitments [Line Items]
Unfunded Commitments	2,212	3,433
Revolver | CB Nike IntermediateCo Ltd
Other Commitments [Line Items]
Unfunded Commitments	44
Revolver | Concert Golf Partners Holdco R/C
Other Commitments [Line Items]
Unfunded Commitments	2,136
Revolver | CPS Group Holdings, Inc.
Other Commitments [Line Items]
Unfunded Commitments	4,933	4,933
Revolver | CST Buyer Company
Other Commitments [Line Items]
Unfunded Commitments	2,190	2,190
Revolver | Darcy Partners
Other Commitments [Line Items]
Unfunded Commitments	349
Revolver | Efficient Collaborative Retail Marketing Company, LLC
Other Commitments [Line Items]
Unfunded Commitments	2,267	2,267
Revolver | Element Buyer, Inc.
Other Commitments [Line Items]
Unfunded Commitments	3,400	2,550
Revolver | Eleven Software
Other Commitments [Line Items]
Unfunded Commitments	1,488
Revolver | Grammer Purchaser, Inc.
Other Commitments [Line Items]
Unfunded Commitments	750	1,050
Revolver | Great Expressions Dental Center PC
Other Commitments [Line Items]
Unfunded Commitments	200	215
Revolver | Green Street Parent, LLC
Other Commitments [Line Items]
Unfunded Commitments	2,419	2,419
Revolver | GSP Holdings, LLC
Other Commitments [Line Items]
Unfunded Commitments	453	2,947
Revolver | JHCC Holdings, LLC
Other Commitments [Line Items]
Unfunded Commitments	1,214	1,939
Revolver | Kellstrom Commercial Aerospace, Inc.
Other Commitments [Line Items]
Unfunded Commitments	1,599	3,092
Revolver | Mach Acquisition R/C
Other Commitments [Line Items]
Unfunded Commitments	7,030	10,043
Revolver | Margaux Acquisition Inc.
Other Commitments [Line Items]
Unfunded Commitments	2,872	2,872
Revolver | Margaux UK Finance Limited
Other Commitments [Line Items]
Unfunded Commitments	557	675
Revolver | MasLabor Revolver
Other Commitments [Line Items]
Unfunded Commitments	1,034	1,034
Revolver | Meriplex Communications Ltd.
Other Commitments [Line Items]
Unfunded Commitments	2,636
Revolver | Morrow Sodali
Other Commitments [Line Items]
Unfunded Commitments	1,861
Revolver | Morrow Sodali
Other Commitments [Line Items]
Unfunded Commitments	2,241
Revolver | MRI Software LLC
Other Commitments [Line Items]
Unfunded Commitments	1,782	1,782
Revolver | MZR Buyer, LLC
Other Commitments [Line Items]
Unfunded Commitments	5,210	5,210
Revolver | New Look Vision Group
Other Commitments [Line Items]
Unfunded Commitments	754	1,700
Revolver | Omni Intermediate DD
Other Commitments [Line Items]
Unfunded Commitments	732
Revolver | Omni Intermediate R/C
Other Commitments [Line Items]
Unfunded Commitments		549
Revolver | Paisley Bidco Limited
Other Commitments [Line Items]
Unfunded Commitments	3,013
Revolver | Refine Intermediate, Inc.
Other Commitments [Line Items]
Unfunded Commitments	5,340	5,340
Revolver | Revalize, Inc.
Other Commitments [Line Items]
Unfunded Commitments		1,340
Revolver | RoC Opco LLC
Other Commitments [Line Items]
Unfunded Commitments	2,731	10,241
Revolver | Saturn Purchaser Corp
Other Commitments [Line Items]
Unfunded Commitments	4,232
Revolver | Service Master Revolving Loan
Other Commitments [Line Items]
Unfunded Commitments	2,070	3,240
Revolver | Smartronix RC
Other Commitments [Line Items]
Unfunded Commitments	6,321	6,321
Revolver | Solaray, LLC
Other Commitments [Line Items]
Unfunded Commitments	6,800	11,844
Revolver | SunMed Group Holdings, LLC
Other Commitments [Line Items]
Unfunded Commitments	639	1,032
Revolver | Superna Inc.
Other Commitments [Line Items]
Unfunded Commitments	2,631
Revolver | Swoogo LLC
Other Commitments [Line Items]
Unfunded Commitments	1,243	1,243
Revolver | TEI Holdings Inc.
Other Commitments [Line Items]
Unfunded Commitments	4,523	4,070
Revolver | Titan Cloud Software, Inc
Other Commitments [Line Items]
Unfunded Commitments	5,714
Revolver | TGI Sport Bidco Pty Ltd
Other Commitments [Line Items]
Unfunded Commitments		3,026
Revolver | TLC Purchaser, Inc.
Other Commitments [Line Items]
Unfunded Commitments	1,828	2,492
Revolver | V Global Holdings LLC
Other Commitments [Line Items]
Unfunded Commitments	8,338	5,835
Revolver | Ventiv Holdco, Inc.
Other Commitments [Line Items]
Unfunded Commitments	3,407	3,407
Revolver | WCI Gigawatt Purchaser DD T/L
Other Commitments [Line Items]
Unfunded Commitments	2,253	3,218
Revolver | WCI-HSG Purchaser, Inc.
Other Commitments [Line Items]
Unfunded Commitments	687	1,478
Revolver | Whitcraft LLC
Other Commitments [Line Items]
Unfunded Commitments	1,559	1,812
Revolver | World Insurance
Other Commitments [Line Items]
Unfunded Commitments	675	861
Revolver | WSP Revolving Loan
Other Commitments [Line Items]
Unfunded Commitments	402	402
Revolver | WU Holdco, Inc.
Other Commitments [Line Items]
Unfunded Commitments	2,705	3,944
Revolver | YLG Holdings, Inc.
Other Commitments [Line Items]
Unfunded Commitments	$ 7,691	8,545
Revolver | Captain D's LLC
Other Commitments [Line Items]
Unfunded Commitments		1,862
Revolver | AMI US Holdings Inc.
Other Commitments [Line Items]
Unfunded Commitments		1,047
Revolver | Tidel Engineering, L.P.
Other Commitments [Line Items]
Unfunded Commitments		4,250
Subordinated Debt | Parcel2Go Acquisition Facility
Other Commitments [Line Items]
Unfunded Commitments		$ 3,731