Beneficial Interests - Schedule of Beneficial Interest Assets and Liabilities (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2026	Sep. 30, 2025	Sep. 30, 2026	Sep. 30, 2025	Dec. 31, 2025
Schedule Of Beneficial Interest [Line Items]
Outstanding principal balance, asset	$ 10,142,186		$ 10,142,186		$ 7,089,947
Fair value, asset	613,652		613,652		396,216
Fair value, liability	20,600		20,600		5,100
Derivatives
Schedule Of Beneficial Interest [Line Items]
Outstanding principal balance, liability	3,155,785		3,155,785		2,325,305
Fair value, liability	20,550		20,550		5,075
Hybrid Instruments
Schedule Of Beneficial Interest [Line Items]
Outstanding principal balance, asset	7,303,390		7,303,390		4,530,737
Fair value, asset	587,763		587,763		372,402
Derivatives
Schedule Of Beneficial Interest [Line Items]
Outstanding principal balance, asset	2,838,796		2,838,796		2,559,210
Fair value, asset	25,889		25,889		$ 23,814
Beneficial interests
Schedule Of Beneficial Interest [Line Items]
Fair value adjustments and realized gains (losses) on beneficial interests, net	$ (7,067)	$ (13,985)	$ (2,340)	$ (2,608)