Consolidated Statements of Changes in Net Assets - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Statement of Partners' Capital [Abstract]
Net assets at beginning of period	$ 1,547,950	$ 1,631,606	$ 1,572,700	$ 1,601,825
Increase (decrease) in net assets from operations:
Net investment income	44,453	66,958	94,067	127,818
Net realized gain (loss)	(80,994)	(28,419)	(125,227)	(45,221)
Net change in unrealized appreciation (depreciation)	75,830	(92,973)	102,074	(94,549)
(Provision) benefit for taxes on realized gain/loss on investments	0	(160)	(72)	(144)
(Provision) benefit for taxes on unrealized appreciation/depreciation on investments		381		335
Net increase (decrease) in net assets from operations	39,289	(54,213)	70,842	(11,761)
Distributions to stockholders from:
Distributable earnings	(61,724)	(52,534)	(118,027)	(102,981)
Total distributions to stockholders	(61,724)	(52,534)	(118,027)	(102,981)
Capital transactions:
Issuance of common stock (net of offering and underwriting costs)		69,249		105,284
Reinvestment of stockholder distributions		1,786		3,527
Repurchases of common stock (including commissions and direct acquisition costs)	(12,126)		(12,126)
Net increase (decrease) in net assets from capital transactions	(12,126)	71,035	(12,126)	108,811
Total increase (decrease) in net assets	(34,561)	(35,712)	(59,311)	(5,931)
Net assets at end of period	$ 1,513,389	$ 1,595,894	$ 1,513,389	$ 1,595,894
Distributions per share	$ 0.53	$ 0.45	$ 1.01	$ 0.9