CONSOLIDATED STATEMENTS OF CHANGES IN NET ASSETS - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Net increase (decrease) in net assets resulting from operations:
Net investment income (loss)	$ 28,449	$ 26,570
Net realized gain (loss) on investments and non-investment assets and liabilities	(18,546)	(13,368)
Net change in unrealized appreciation (depreciation) on investments and non-investment assets and liabilities	19,361	14,785
Net increase (decrease) in net assets resulting from operations	29,264	27,987
Capital transactions:
Repurchase of common stock	0	(3,993)
Dividends declared on preferred and common stock (Note 10)	(25,256)	(23,224)
Net increase (decrease) in net assets resulting from capital transactions	(25,256)	(27,217)
Net increase (decrease) in net assets	4,008	770
Net assets at beginning of period	912,812	917,423
Net assets at end of period	$ 916,820	$ 918,193