Joint Venture - Schedule of Operations Information (Details) - USD ($) $ in Thousands	3 Months Ended						6 Months Ended		12 Months Ended
	Jun. 30, 2024	Mar. 31, 2024	Dec. 31, 2023	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023	Jun. 30, 2024	Jun. 30, 2023	Dec. 31, 2023
Condensed Income Statements, Captions [Line Items]
Total investment income	$ 61,357				$ 58,496		$ 134,911	$ 123,471	$ 251,010
Net change in unrealized (depreciation) appreciation on investments	19,692	$ (16,412)	$ 29,585	$ 25,606	23,406	$ (56,378)	3,280	(32,972)	22,219
CION/EagleTree
Condensed Income Statements, Captions [Line Items]
Total investment income	1,143				1,468		2,445	3,063	6,230
Total expenses	2,173				2,566		4,691	5,258	10,213
Net realized gain (loss) on investments	3,325				0		3,325	176	(2,083)
Net change in unrealized (depreciation) appreciation on investments	(4,291)				409		(9,874)	446	4,338
Net decrease in net assets	$ (1,996)				$ (689)		$ (8,795)	$ (1,573)	$ (1,728)