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Debt - Schedule of Debt Obligations (Details) - USD ($)	Jun. 30, 2026	Apr. 16, 2026	Dec. 31, 2025	Jul. 15, 2025	Jul. 14, 2025	May 15, 2025	Apr. 04, 2025	Mar. 31, 2025	Feb. 28, 2025	Nov. 19, 2024	Oct. 10, 2024	Apr. 11, 2024	Mar. 20, 2024	Jan. 22, 2024	Jan. 04, 2024	Dec. 08, 2023	Nov. 21, 2023	Jul. 29, 2023	Mar. 09, 2023	Jul. 26, 2022	Apr. 20, 2022	Oct. 13, 2021	Aug. 17, 2021	Jul. 09, 2021	Jun. 11, 2021	Apr. 26, 2021	Dec. 08, 2020	Nov. 20, 2020	Jul. 23, 2020	Mar. 26, 2020	May 28, 2019
Debt Instrument [Line Items]
Total Debt	$ 12,242,073,000		$ 12,972,588,000
Outstanding Principal	8,019,273,000		9,390,288,000
Unused Portion	4,185,021,000		3,540,141,000
Amount Available	4,138,072,000		3,258,164,000
Unamortized Debt Issuance Costs	(101,772,000)		(93,186,000)
Debt	7,903,533,000		9,300,076,000
Line of credit
Debt Instrument [Line Items]
Outstanding letters of credit	37,800,000		42,200,000
Line of credit | SPV Asset Facility II
Debt Instrument [Line Items]
Aggregate Principal Committed	300,000,000		300,000,000					$ 300,000,000.0
Outstanding Principal	256,200,000		161,700,000
Unused Portion	43,800,000		138,300,000
Amount Available	43,800,000		137,146,000
Unamortized Debt Issuance Costs	(5,295,000)		(5,562,000)
Debt	250,905,000		156,138,000
Line of credit | SPV Asset Facility V
Debt Instrument [Line Items]
Aggregate Principal Committed	525,000,000		525,000,000													$ 525,000,000.0
Outstanding Principal	430,500,000		384,000,000
Unused Portion	94,500,000		141,000,000
Amount Available	94,500,000		48,167,000
Unamortized Debt Issuance Costs	(4,412,000)		(5,001,000)
Debt	426,088,000		378,999,000
Line of credit | SPV Asset Facility VI
Debt Instrument [Line Items]
Aggregate Principal Committed	500,000,000		500,000,000								$ 500,000,000.0
Outstanding Principal	310,000,000		300,000,000
Unused Portion	190,000,000		200,000,000
Amount Available	143,051,000		92,046,000
Unamortized Debt Issuance Costs	(3,530,000)		(4,041,000)
Debt	306,470,000		295,959,000
Line of credit | SPV Asset Facility VII
Debt Instrument [Line Items]
Aggregate Principal Committed			300,000,000										$ 300,000,000.0
Outstanding Principal			210,000,000
Unused Portion			90,000,000
Amount Available			9,964,000
Unamortized Debt Issuance Costs			(1,601,000)
Debt			208,399,000
Line of credit | Revolving Credit Facility | Revolving Credit Facility
Debt Instrument [Line Items]
Aggregate Principal Committed	4,000,000,000		4,025,000,000	$ 3,930,000,000	$ 3,950,000,000
Outstanding Principal	105,500,000		1,012,000,000
Unused Portion	3,856,721,000		2,970,841,000
Amount Available	3,856,721,000		2,970,841,000
Unamortized Debt Issuance Costs	(34,124,000)		(27,931,000)
Debt	71,376,000		984,069,000
Borrowing base value	5,650,000,000		5,900,000,000
Line of credit | Revolving Credit Facility | SPV Asset Facility II
Debt Instrument [Line Items]
Aggregate Principal Committed								$ 300,000,000.0
Secured debt | CLO I
Debt Instrument [Line Items]
Aggregate Principal Committed			390,000,000												$ 390,000,000.0																$ 596,000,000.0
Outstanding Principal			390,000,000
Unamortized Debt Issuance Costs			(3,489,000)
Debt			386,511,000
Secured debt | CLO III
Debt Instrument [Line Items]
Aggregate Principal Committed	260,000,000		260,000,000									$ 260,000,000																		$ 395,300,000
Outstanding Principal	260,000,000		260,000,000
Unamortized Debt Issuance Costs	(1,638,000)		(1,727,000)
Debt	258,362,000		258,273,000
Secured debt | CLO IV
Debt Instrument [Line Items]
Aggregate Principal Committed	219,948,000		275,463,000																					$ 440,500,000
Outstanding Principal	219,948,000		275,463,000
Unamortized Debt Issuance Costs	(2,782,000)		(3,346,000)
Debt	217,166,000		272,117,000
Secured debt | CLO V
Debt Instrument [Line Items]
Aggregate Principal Committed	509,625,000		509,625,000																		$ 669,200,000							$ 345,500,000
Outstanding Principal	509,625,000		509,625,000
Unamortized Debt Issuance Costs	(1,939,000)		(2,062,000)
Debt	507,686,000		507,563,000
Secured debt | CLO VII
Debt Instrument [Line Items]
Aggregate Principal Committed	330,500,000		330,500,000						$ 484,900,000											$ 350,500,000
Outstanding Principal	330,500,000		330,500,000
Unamortized Debt Issuance Costs	(2,041,000)		(2,127,000)
Debt	328,459,000		328,373,000
Secured debt | CLO X
Debt Instrument [Line Items]
Aggregate Principal Committed	272,000,000		272,000,000				$ 409,700,000												$ 397,700,000
Outstanding Principal	272,000,000		272,000,000
Unamortized Debt Issuance Costs	(1,833,000)		(1,797,000)
Debt	270,167,000		270,203,000
Secured debt | CLO XIV
Debt Instrument [Line Items]
Aggregate Principal Committed			260,000,000														$ 397,300,000
Outstanding Principal			260,000,000
Unamortized Debt Issuance Costs			(1,578,000)
Debt			258,422,000
Unsecured Debt | 2026 Notes
Debt Instrument [Line Items]
Aggregate Principal Committed			500,000,000																										$ 500,000,000.0
Outstanding Principal			500,000,000
Unamortized Debt Issuance Costs			(91,000)
Debt			499,909,000
Unsecured Debt | July 2026 Notes
Debt Instrument [Line Items]
Aggregate Principal Committed	1,000,000,000		1,000,000,000																								$ 1,000,000,000.00
Outstanding Principal	1,000,000,000		1,000,000,000
Unamortized Debt Issuance Costs	(197,000)		(2,717,000)
Debt	999,803,000		997,283,000
Unsecured Debt | 2027 Notes
Debt Instrument [Line Items]
Aggregate Principal Committed	500,000,000		500,000,000																							$ 500,000,000.0
Outstanding Principal	500,000,000		500,000,000
Unamortized Debt Issuance Costs	(9,073,000)		(2,117,000)
Debt	489,826,000		483,987,000
Unsecured Debt | April 2027 Notes
Debt Instrument [Line Items]
Aggregate Principal Committed	325,000,000		325,000,000																			$ 325,000,000.0
Outstanding Principal	325,000,000		325,000,000
Unamortized Debt Issuance Costs	(665,000)		(1,078,000)
Debt	324,335,000		323,922,000
Unsecured Debt | July 2027 Notes
Debt Instrument [Line Items]
Aggregate Principal Committed	250,000,000		250,000,000
Outstanding Principal	250,000,000		250,000,000
Unamortized Debt Issuance Costs	(962,000)		(1,389,000)
Debt	249,038,000		248,611,000
Unsecured Debt | 2028 Notes
Debt Instrument [Line Items]
Aggregate Principal Committed	850,000,000		850,000,000																				$ 400,000,000.0		$ 450,000,000.0
Outstanding Principal	850,000,000		850,000,000
Unamortized Debt Issuance Costs	(5,251,000)		(6,549,000)
Debt	844,749,000		843,451,000
Unsecured Debt | June 2028 Notes
Debt Instrument [Line Items]
Aggregate Principal Committed	100,000,000		100,000,000															$ 100,000,000.0
Outstanding Principal	100,000,000		100,000,000
Unamortized Debt Issuance Costs	(469,000)		(585,000)
Debt	99,531,000		99,415,000
Unsecured Debt | September 2028 Notes
Debt Instrument [Line Items]
Aggregate Principal Committed	400,000,000	$ 400,000,000.0
Outstanding Principal	400,000,000
Unamortized Debt Issuance Costs	(2,861,000)
Debt	393,582,000
Unsecured Debt | 2029 Notes
Debt Instrument [Line Items]
Aggregate Principal Committed	1,000,000,000		1,000,000,000							$ 400,000,000.0				$ 600,000,000.0
Outstanding Principal	1,000,000,000		1,000,000,000
Unamortized Debt Issuance Costs	(6,965,000)		(8,373,000)
Debt	986,672,000		1,002,667,000
Unsecured Debt | 2030 Notes
Debt Instrument [Line Items]
Aggregate Principal Committed	500,000,000		500,000,000			$ 500,000,000.0
Outstanding Principal	500,000,000		500,000,000
Unamortized Debt Issuance Costs	(9,041,000)		(10,025,000)
Debt	486,848,000		$ 495,805,000
Unsecured Debt | 2031 Notes
Debt Instrument [Line Items]
Aggregate Principal Committed	400,000,000
Outstanding Principal	400,000,000
Unamortized Debt Issuance Costs	(8,694,000)
Debt	$ 392,470,000

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