Joint Ventures - Statement of Operations Information (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Dec. 31, 2022
Condensed Income Statements, Captions [Line Items]
Net change in unrealized appreciation (depreciation) on investments	$ (56,378)	$ (11,525)	$ (5,314)
Net (decrease) increase in net assets	(53,324)	(8,059)	(46,878)
CION/EagleTree
Condensed Income Statements, Captions [Line Items]
Total revenues	1,595	1,884	9,653
Total expenses	2,692	2,720	11,120
Net realized gain on investments	176	0	9,947
Net change in unrealized appreciation (depreciation) on investments	37	542	(5,839)
Net (decrease) increase in net assets	$ (884)	$ (294)	$ 2,641