Consolidated Statements of Changes in Net Assets - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Increase (Decrease) in Net Assets Resulting from Operations
Net investment income (loss)		$ 741,057	$ 753,611	$ 556,718
Net change in unrealized gain (loss)		(50,169)	92,946	(94,509)
Net realized gain (loss)		(95,908)	(53,245)	4,146
Net Increase (Decrease) in Net Assets Resulting from Operations		594,980	793,312	466,355
Distributions
Distributions declared from earnings	[1]	(670,954)	(620,264)	(507,822)
Capital Share Transactions
Repurchase of common shares		0	(34,058)	(25,958)
Reinvestment of distributions		7,422	0	11,951
Net Increase (Decrease) in Net Assets Resulting from Capital Share Transactions		7,422	(34,058)	(14,007)
Total Increase (Decrease) in Net Assets		(68,552)	138,990	(55,474)
Net Assets, at beginning of period		6,021,393	5,882,403	5,937,877
Net Assets, at end of period		$ 5,952,841	$ 6,021,393	$ 5,882,403

[1] (1)For the year ended December 31, 2024 distributions declared from earnings were derived from net investment income and capital gains. For the year ended December 31, 2023 distributions declared from earnings were derived from net investment income and capital gains. For the year ended December 31, 2022, distributions declared from earnings were derived from net investment income.