Investments - Schedule of OBDC SLF’s Portfolio (Details) - OBDC Senior Loan Fund $ in Thousands	Dec. 31, 2023 USD ($) portfolio_company	Dec. 31, 2022 USD ($) portfolio_company
Schedule of Investments [Line Items]
Total senior secured debt investments	$ 1,117,310	$ 1,045,865
Number of portfolio companies | portfolio_company	62	56
Largest funded investment to a single borrower	$ 39,851	$ 40,272
Weighted Average | Base Rate
Schedule of Investments [Line Items]
Weighted average spread over base rate	4.27%	4.05%