Investments - Schedule of Composition of Investments Based on Fair Value (Details) - Investment Owned, At Fair Value	9 Months Ended	12 Months Ended
	Sep. 30, 2023	Dec. 31, 2022
Industry Concentration Risk
Schedule of Investments [Line Items]
Concentration risk (as percent)	100.00%	100.00%
Industry Concentration Risk | Advertising and media
Schedule of Investments [Line Items]
Concentration risk (as percent)	1.40%	1.50%
Industry Concentration Risk | Aerospace and defense
Schedule of Investments [Line Items]
Concentration risk (as percent)	3.00%	2.80%
Industry Concentration Risk | Asset based lending and fund finance
Schedule of Investments [Line Items]
Concentration risk (as percent)	6.30%	4.90%
Industry Concentration Risk | Automotive
Schedule of Investments [Line Items]
Concentration risk (as percent)	2.00%	1.50%
Industry Concentration Risk | Buildings and real estate
Schedule of Investments [Line Items]
Concentration risk (as percent)	3.90%	3.70%
Industry Concentration Risk | Business services
Schedule of Investments [Line Items]
Concentration risk (as percent)	3.00%	2.90%
Industry Concentration Risk | Chemicals
Schedule of Investments [Line Items]
Concentration risk (as percent)	1.30%	1.60%
Industry Concentration Risk | Consumer products
Schedule of Investments [Line Items]
Concentration risk (as percent)	3.90%	3.90%
Industry Concentration Risk | Containers and packaging
Schedule of Investments [Line Items]
Concentration risk (as percent)	1.30%	1.30%
Industry Concentration Risk | Distribution
Schedule of Investments [Line Items]
Concentration risk (as percent)	3.60%	4.20%
Industry Concentration Risk | Education
Schedule of Investments [Line Items]
Concentration risk (as percent)	0.80%	1.00%
Industry Concentration Risk | Financial services
Schedule of Investments [Line Items]
Concentration risk (as percent)	4.60%	5.00%
Industry Concentration Risk | Food and beverage
Schedule of Investments [Line Items]
Concentration risk (as percent)	6.40%	6.70%
Industry Concentration Risk | Healthcare equipment and services
Schedule of Investments [Line Items]
Concentration risk (as percent)	4.00%	3.90%
Industry Concentration Risk | Healthcare providers and services
Schedule of Investments [Line Items]
Concentration risk (as percent)	4.60%	4.50%
Industry Concentration Risk | Healthcare technology
Schedule of Investments [Line Items]
Concentration risk (as percent)	4.70%	4.80%
Industry Concentration Risk | Household products
Schedule of Investments [Line Items]
Concentration risk (as percent)	2.30%	2.10%
Industry Concentration Risk | Human resource support services
Schedule of Investments [Line Items]
Concentration risk (as percent)	1.50%	1.50%
Industry Concentration Risk | Infrastructure and environmental services
Schedule of Investments [Line Items]
Concentration risk (as percent)	1.30%	1.20%
Industry Concentration Risk | Insurance
Schedule of Investments [Line Items]
Concentration risk (as percent)	9.60%	9.30%
Industry Concentration Risk | Internet software and services
Schedule of Investments [Line Items]
Concentration risk (as percent)	12.70%	13.30%
Industry Concentration Risk | Joint ventures
Schedule of Investments [Line Items]
Concentration risk (as percent)	2.90%	2.20%
Industry Concentration Risk | Leisure and entertainment
Schedule of Investments [Line Items]
Concentration risk (as percent)	1.80%	2.20%
Industry Concentration Risk | Manufacturing
Schedule of Investments [Line Items]
Concentration risk (as percent)	5.80%	5.80%
Industry Concentration Risk | Oil and gas
Schedule of Investments [Line Items]
Concentration risk (as percent)	0.30%	0.80%
Industry Concentration Risk | Pharmaceuticals
Schedule of Investments [Line Items]
Concentration risk (as percent)	0.20%	0.00%
Industry Concentration Risk | Professional services
Schedule of Investments [Line Items]
Concentration risk (as percent)	3.90%	3.50%
Industry Concentration Risk | Specialty retail
Schedule of Investments [Line Items]
Concentration risk (as percent)	2.20%	2.20%
Industry Concentration Risk | Transportation
Schedule of Investments [Line Items]
Concentration risk (as percent)	0.70%	1.70%
Geographic Concentration Risk
Schedule of Investments [Line Items]
Concentration risk (as percent)	100.00%	100.00%
Geographic Concentration Risk | Midwest
Schedule of Investments [Line Items]
Concentration risk (as percent)	18.10%	17.50%
Geographic Concentration Risk | Northeast
Schedule of Investments [Line Items]
Concentration risk (as percent)	19.60%	20.40%
Geographic Concentration Risk | South
Schedule of Investments [Line Items]
Concentration risk (as percent)	34.60%	34.40%
Geographic Concentration Risk | West
Schedule of Investments [Line Items]
Concentration risk (as percent)	19.70%	20.60%
Geographic Concentration Risk | International
Schedule of Investments [Line Items]
Concentration risk (as percent)	8.00%	7.10%