Fair Value of Investments - Schedule of Carrying and Fair Values of the Company’s Debt Obligations (Details) - USD ($) $ in Thousands	Mar. 31, 2026	Dec. 31, 2025
Debt Instrument [Line Items]
Net Carrying Value	$ 8,380,730	$ 9,272,214
Debt Issuance Costs	(95,244)	(93,186)
Net Carrying Value
Debt Instrument [Line Items]
Net Carrying Value	8,454,559	9,300,076
Fair Value
Debt Instrument [Line Items]
Net Carrying Value	8,380,730	9,272,214
Level 1
Debt Instrument [Line Items]
Net Carrying Value	0	0
Level 2
Debt Instrument [Line Items]
Net Carrying Value	4,417,000	4,967,188
Level 3
Debt Instrument [Line Items]
Net Carrying Value	3,963,730	4,305,026
Line of Credit \| SPV Asset Facility II
Debt Instrument [Line Items]
Debt Issuance Costs	(5,429)	(5,562)
Line of Credit \| SPV Asset Facility II \| Net Carrying Value
Debt Instrument [Line Items]
Net Carrying Value	278,271	156,138
Line of Credit \| SPV Asset Facility II \| Fair Value
Debt Instrument [Line Items]
Net Carrying Value	278,271	156,138
Line of Credit \| SPV Asset Facility V
Debt Instrument [Line Items]
Debt Issuance Costs	(4,708)	(5,001)
Line of Credit \| SPV Asset Facility V \| Net Carrying Value
Debt Instrument [Line Items]
Net Carrying Value	478,292	378,999
Line of Credit \| SPV Asset Facility V \| Fair Value
Debt Instrument [Line Items]
Net Carrying Value	478,292	378,999
Line of Credit \| SPV Asset Facility VI
Debt Instrument [Line Items]
Debt Issuance Costs	(3,787)	(4,041)
Line of Credit \| SPV Asset Facility VI \| Net Carrying Value
Debt Instrument [Line Items]
Net Carrying Value	436,213	295,959
Line of Credit \| SPV Asset Facility VI \| Fair Value
Debt Instrument [Line Items]
Net Carrying Value	436,213	295,959
Line of Credit \| SPV Asset Facility VII
Debt Instrument [Line Items]
Debt Issuance Costs	(1,478)	(1,601)
Line of Credit \| SPV Asset Facility VII \| Net Carrying Value
Debt Instrument [Line Items]
Net Carrying Value	298,522	208,399
Line of Credit \| SPV Asset Facility VII \| Fair Value
Debt Instrument [Line Items]
Net Carrying Value	298,522	208,399
Secured Debt \| CLO I
Debt Instrument [Line Items]
Debt Issuance Costs	(3,394)	(3,489)
Secured Debt \| CLO I \| Net Carrying Value
Debt Instrument [Line Items]
Net Carrying Value	386,606	386,511
Secured Debt \| CLO I \| Fair Value
Debt Instrument [Line Items]
Net Carrying Value	386,606	386,511
Secured Debt \| CLO III
Debt Instrument [Line Items]
Debt Issuance Costs	(1,679)	(1,727)
Secured Debt \| CLO III \| Net Carrying Value
Debt Instrument [Line Items]
Net Carrying Value	258,321	258,273
Secured Debt \| CLO III \| Fair Value
Debt Instrument [Line Items]
Net Carrying Value	258,321	258,273
Secured Debt \| CLO IV
Debt Instrument [Line Items]
Debt Issuance Costs	(2,946)	(3,346)
Secured Debt \| CLO IV \| Net Carrying Value
Debt Instrument [Line Items]
Net Carrying Value	231,502	272,117
Secured Debt \| CLO IV \| Fair Value
Debt Instrument [Line Items]
Net Carrying Value	231,502	272,117
Secured Debt \| CLO V
Debt Instrument [Line Items]
Debt Issuance Costs	(2,001)	(2,062)
Secured Debt \| CLO V \| Net Carrying Value
Debt Instrument [Line Items]
Net Carrying Value	507,624	507,563
Secured Debt \| CLO V \| Fair Value
Debt Instrument [Line Items]
Net Carrying Value	507,624	507,563
Secured Debt \| CLO VII
Debt Instrument [Line Items]
Debt Issuance Costs	(2,084)	(2,127)
Secured Debt \| CLO VII \| Net Carrying Value
Debt Instrument [Line Items]
Net Carrying Value	328,416	328,373
Secured Debt \| CLO VII \| Fair Value
Debt Instrument [Line Items]
Net Carrying Value	328,416	328,373
Secured Debt \| CLO X
Debt Instrument [Line Items]
Debt Issuance Costs	(1,875)	(1,797)
Secured Debt \| CLO X \| Net Carrying Value
Debt Instrument [Line Items]
Net Carrying Value	270,125	270,203
Secured Debt \| CLO X \| Fair Value
Debt Instrument [Line Items]
Net Carrying Value	270,125	270,203
Secured Debt \| CLO XIV
Debt Instrument [Line Items]
Debt Issuance Costs	0	(1,578)
Secured Debt \| CLO XIV \| Net Carrying Value
Debt Instrument [Line Items]
Net Carrying Value	0	258,422
Secured Debt \| CLO XIV \| Fair Value
Debt Instrument [Line Items]
Net Carrying Value	0	258,422
Unsecured debt investments \| 2026 Notes
Debt Instrument [Line Items]
Debt Issuance Costs	0	(91)
Unsecured debt investments \| 2026 Notes \| Net Carrying Value
Debt Instrument [Line Items]
Net Carrying Value	0	499,909
Unsecured debt investments \| 2026 Notes \| Fair Value
Debt Instrument [Line Items]
Net Carrying Value	0	498,750
Unsecured debt investments \| July 2026 Notes
Debt Instrument [Line Items]
Debt Issuance Costs	(1,467)	(2,717)
Unsecured debt investments \| July 2026 Notes \| Net Carrying Value
Debt Instrument [Line Items]
Net Carrying Value	998,533	997,283
Unsecured debt investments \| July 2026 Notes \| Fair Value
Debt Instrument [Line Items]
Net Carrying Value	992,500	992,500
Unsecured debt investments \| 2027 Notes
Debt Instrument [Line Items]
Debt Issuance Costs	(12,540)	(2,117)
Unsecured debt investments \| 2027 Notes \| Net Carrying Value
Debt Instrument [Line Items]
Net Carrying Value	486,646	483,987
Unsecured debt investments \| 2027 Notes \| Fair Value
Debt Instrument [Line Items]
Net Carrying Value	487,500	488,750
Unsecured debt investments \| April 2027 Notes
Debt Instrument [Line Items]
Debt Issuance Costs	(873)	(1,078)
Unsecured debt investments \| April 2027 Notes \| Net Carrying Value
Debt Instrument [Line Items]
Net Carrying Value	324,127	323,922
Unsecured debt investments \| April 2027 Notes \| Fair Value
Debt Instrument [Line Items]
Net Carrying Value	315,250	317,688
Unsecured debt investments \| July 2027 Notes
Debt Instrument [Line Items]
Debt Issuance Costs	(1,177)	(1,389)
Unsecured debt investments \| July 2027 Notes \| Net Carrying Value
Debt Instrument [Line Items]
Net Carrying Value	248,823	248,611
Unsecured debt investments \| July 2027 Notes \| Fair Value
Debt Instrument [Line Items]
Net Carrying Value	250,000	250,000
Unsecured debt investments \| 2028 Notes
Debt Instrument [Line Items]
Debt Issuance Costs	(5,905)	(6,549)
Unsecured debt investments \| 2028 Notes \| Net Carrying Value
Debt Instrument [Line Items]
Net Carrying Value	844,095	843,451
Unsecured debt investments \| 2028 Notes \| Fair Value
Debt Instrument [Line Items]
Net Carrying Value	790,500	803,250
Unsecured debt investments \| June 2028 Notes
Debt Instrument [Line Items]
Debt Issuance Costs	(527)	(585)
Unsecured debt investments \| June 2028 Notes \| Net Carrying Value
Debt Instrument [Line Items]
Net Carrying Value	99,473	99,415
Unsecured debt investments \| June 2028 Notes \| Fair Value
Debt Instrument [Line Items]
Net Carrying Value	100,000	100,000
Unsecured debt investments \| 2029 Notes
Debt Instrument [Line Items]
Debt Issuance Costs	(7,674)	(8,373)
Unsecured debt investments \| 2029 Notes \| Net Carrying Value
Debt Instrument [Line Items]
Net Carrying Value	996,429	1,002,667
Unsecured debt investments \| 2029 Notes \| Fair Value
Debt Instrument [Line Items]
Net Carrying Value	987,500	1,010,000
Unsecured debt investments \| 2030 Notes
Debt Instrument [Line Items]
Debt Issuance Costs	(9,538)	(10,025)
Unsecured debt investments \| 2030 Notes \| Net Carrying Value
Debt Instrument [Line Items]
Net Carrying Value	492,703	495,805
Unsecured debt investments \| 2030 Notes \| Fair Value
Debt Instrument [Line Items]
Net Carrying Value	493,750	506,250
Revolving Credit Facility \| Line of Credit \| Revolving Credit Facility
Debt Instrument [Line Items]
Debt Issuance Costs	(26,162)	(27,931)
Revolving Credit Facility \| Line of Credit \| Revolving Credit Facility \| Net Carrying Value
Debt Instrument [Line Items]
Net Carrying Value	489,838	984,069
Revolving Credit Facility \| Line of Credit \| Revolving Credit Facility \| Fair Value
Debt Instrument [Line Items]
Net Carrying Value	$ 489,838	$ 984,069