Beneficial Interests - Schedule of Beneficial Interest Assets and Liabilities (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024	Dec. 31, 2024
Schedule Of Beneficial Interest [Line Items]
Unpaid principal balance, asset	$ 5,109,569		$ 5,109,569		$ 4,157,750
Fair value, asset	266,761		266,761		176,848
Fair value, liability	10,500		10,500		10,100
Derivatives
Schedule Of Beneficial Interest [Line Items]
Unpaid principal balance, liability	2,155,391		2,155,391		1,091,538
Fair value, liability	10,532		10,532		10,089
Hybrid Instruments
Schedule Of Beneficial Interest [Line Items]
Unpaid principal balance, asset	2,876,992		2,876,992		2,214,535
Fair value, asset	254,230		254,230		168,091
Derivatives
Schedule Of Beneficial Interest [Line Items]
Unpaid principal balance, asset	2,232,577		2,232,577		1,943,215
Fair value, asset	12,531		12,531		$ 8,757
Beneficial interests
Schedule Of Beneficial Interest [Line Items]
Fair value adjustments and realized gains (losses) on beneficial interests, net	$ (6,288)	$ (8,176)	$ 11,377	$ (22,210)