Related Party Transactions - Narrative (Details) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Related Party Transaction [Line Items]
Investment company, contractual fee waived	[1]	$ 19	$ 1,700	$ 274	$ 2,398
Investment Advisory Agreement | Affiliated Entity
Related Party Transaction [Line Items]
Management and service fees, base rate				1.75%
Investment company, contractual fee waived		$ 19	$ 1,700	$ 274	$ 2,398

[1] See Note 4 for a discussion of the offset by FS/EIG Advisor, LLC, the Company's investment adviser, of certain management fees to which it was otherwise entitled during the applicable period.