Condensed Consolidated Statements of Operations - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Investment income:
Total investment income	$ 343,218	$ 283,959	$ 974,242	$ 839,263
Expenses:
Interest expense	88,191	65,253	233,752	198,129
Management fees (Note 3)	30,177	24,219	84,312	73,190
Income based incentive fees payable	38,163	33,410	111,388	98,294
Capital gains based incentive fees payable	(5,992)	1,484	264	(4,022)
Professional fees	1,297	1,814	3,317	4,021
Board of Trustees’ fees	286	222	797	682
Administrative service expenses (Note 3)	525	544	1,966	1,598
Other general and administrative	740	2,062	2,899	5,669
Total expenses before excise tax	153,387	129,008	438,695	377,561
Management fees waived (Note 3)	0	(6,055)	0	(18,298)
Incentive fees waived (Note 3)	0	(4,773)	0	(14,043)
Net expenses before excise tax	153,387	118,180	438,695	345,220
Net investment income before excise tax	189,831	165,779	535,547	494,043
Excise tax expense	3,928	4,988	10,698	12,589
Net investment income after excise tax	185,903	160,791	524,849	481,454
Net change in unrealized appreciation (depreciation):
Net change in unrealized (appreciation) depreciation on investments			15,872	(27,800)
Translation of assets and liabilities in foreign currencies	(2,255)	(133)	(2,152)	(3,499)
Net change in unrealized appreciation (depreciation)	(19,130)	20,740	13,720	(31,299)
Net realized gain (loss):
Non-controlled/non-affiliated investments			(16,650)	(13,295)
Foreign currency transactions	2,164	(1,540)	9,686	17,783
Net realized gain (loss)	(15,109)	(10,536)	(6,964)	4,488
Net realized and change in unrealized gain (loss)	(34,239)	10,204	6,756	(26,811)
Net increase (decrease) in net assets resulting from operations	$ 151,664	$ 170,995	$ 531,605	$ 454,643
Net investment income (in usd per share)	$ 0.91	$ 0.95	$ 2.68	$ 2.94
Earnings (loss) per share basic (in usd per share)	0.75	1.01	2.71	2.77
Earnings (loss) per share diluted (in usd per share)	$ 0.75	$ 1.01	$ 2.71	$ 2.77
Weighted average shares outstanding basic (in shares)	203,419,337	169,843,500	196,003,012	163,842,428
Weighted average shares outstanding diluted (in shares)	203,419,337	169,843,500	196,003,012	163,842,428
Non-controlled/non-affiliated investments
Investment income:
Interest income	$ 321,401	$ 272,464	$ 907,356	$ 800,599
Payment-in-kind interest income	20,530	10,689	63,868	31,805
Dividend income	11	213	200	373
Fee income	510	593	1,915	6,486
Net change in unrealized appreciation (depreciation):
Net change in unrealized (appreciation) depreciation on investments	(16,794)	20,388	16,746	(14,830)
Net realized gain (loss):
Non-controlled/non-affiliated investments	(17,273)	(8,996)	(16,650)	(20,502)
Non-controlled/affiliated investments
Investment income:
Interest income	89	0	226	0
Payment-in-kind interest income	677	0	677	0
Net change in unrealized appreciation (depreciation):
Net change in unrealized (appreciation) depreciation on investments	(81)	485	(874)	(12,970)
Net realized gain (loss):
Non-controlled/non-affiliated investments	$ 0	$ 0	$ 0	$ 7,207