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
Investment Company, Net Assets [Roll Forward]
Net assets at the beginning of period		$ 1,817,807	$ 1,837,027	$ 1,842,156	$ 1,721,151
Increase (decrease) in net assets resulting from operations:
Net investment income (loss)		43,657	56,121	89,885	110,772
Net realized gain (loss)		91	108	640	(5,517)
Net change in unrealized appreciation (depreciation)		(7,652)	2,816	(24,759)	5,474
Net increase (decrease) in net assets resulting from operations		36,096	59,045	65,766	110,729
Distributions to stockholders from:
Distributable earnings		(43,481)	(44,704)	(87,491)	(89,151)
Total distributions to stockholders		(43,481)	(44,704)	(87,491)	(89,151)
Capital transactions:
Issuance of common stock, net of underwriting and offering costs	[1]	(123)	0	(123)	95,847
Reinvestment of dividends		0	10,593	0	23,385
Repurchase of common stock		(20,000)	0	(30,009)	0
Net increase (decrease) in net assets resulting from capital transactions		(20,123)	10,593	(30,132)	119,232
Total increase (decrease) in net assets		(27,508)	24,934	(51,857)	140,810
Net assets at end of period		$ 1,790,299	$ 1,861,961	$ 1,790,299	$ 1,861,961
Dividends per share (in dollars per share)		$ 0.50	$ 0.50	$ 1.00	$ 1.00

[1] Includes costs incurred in connection with the Company's at-the-market (“ATM”) program. See Note 8 "Net Assets."