Income Taxes - Summary of Reconciliation Increase in Net Assets (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Income Tax Disclosure [Abstract]
Increase in net assets resulting from operations	$ 222,023	$ 108,053	$ 211,780
Adjustments:
Net unrealized (gain) losses on investments	(13,191)	74,969	(40,546)
Other income for tax purposes, not book.	2,680	688	4,957
Deferred organization costs	(100)	(100)	(100)
Other expenses not currently deductible	2,263	2,621	391
Other book-tax differences	(4,959)	(11,123)	(3,771)
Taxable Income	$ 208,716	$ 175,108	$ 172,711