Consolidated Statements of Changes in Net Assets - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Statement of Partners' Capital [Abstract]
Net assets at beginning of period	$ 1,601,825	$ 1,502,394
Increase (decrease) in net assets from operations:
Net investment income	60,860	47,986
Net realized gain (loss)	(16,802)	(36,061)
Net change in unrealized appreciation (depreciation)	(1,576)	16,524
(Provision) benefit for taxes on realized gain/loss on investments	16
(Provision) benefit for taxes on unrealized appreciation/depreciation on investments	(46)	(386)
Net increase (decrease) in net assets from operations	42,452	28,063
Distributions to stockholders from:
Distributable earnings	(50,447)	(49,258)
Total distributions to stockholders	(50,447)	(49,258)
Capital transactions:
Issuance of common stock (net of offering and underwriting costs)	36,035	97,556
Reinvestment of stockholder distributions	1,741	1,690
Net increase in net assets from capital transactions	37,776	99,246
Total increase (decrease) in net assets	29,781	78,051
Net assets at end of period	$ 1,631,606	$ 1,580,445
Distributions per share	$ 0.45	$ 0.45