Beneficial Interests - Schedule of Beneficial Interest Liabilities (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023	Dec. 31, 2023
Schedule Of Beneficial Interest [Line Items]
Unpaid principal balance, asset	$ 2,117,435		$ 2,117,435		$ 958,870
Unpaid principal balance, liability	1,010,089		1,010,089		769,102
Fair value, asset	97,804		97,804		41,012
Fair value, liability	11,198		11,198		$ 4,221
Beneficial interests
Schedule Of Beneficial Interest [Line Items]
Fair value adjustments and realized losses on beneficial interests, net	$ (8,176)	$ (1,956)	$ (22,210)	$ (1,956)