Investments - SLF, Net increase (decrease) in members' capital (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Investment income:
Total investment income	$ 45,852	$ 16,387
Expenses:
Interest and other debt financing expenses	12,089	3,280
Professional fees	310	145
Net investment income	23,362	7,915
Net gain (loss):
Net change in unrealized gain (loss)	4,718	2,370
Net gain (loss)	5,691	2,413
Net increase (decrease) in net assets resulting from operations	$ 29,053	$ 10,328