Mortgage Banking Activities, Net (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Other income, net	$ 5,985	$ 352	$ 8,422	$ 1,902
Total Mortgage banking activities, net	32,071	40,857	64,035	73,910
Sequoia
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Other income, net	3,941	870	4,508	956
Total Mortgage banking activities, net	12,944	24,313	34,995	46,232
Sequoia | Residential consumer loans, at fair value
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Fair value of loans	48,709	14,019	69,237	44,392
Sequoia | Trading securities
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Fair value of loans	6,047	(38,645)	42,914	(67,972)
Sequoia | Risk management derivatives
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Risk management derivatives	(45,753)	48,069	(81,664)	68,856
Aspire
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Other income, net	550	48	920	54
Total Mortgage banking activities, net	9,199	83	11,883	315
Aspire | Residential consumer loans, at fair value
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Fair value of loans	(7,561)	1,076	(9,803)	1,302
Aspire | Trading securities
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Fair value of loans	972	0	1,300	0
Aspire | Risk management derivatives
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Risk management derivatives	15,238	(1,041)	19,466	(1,041)
CoreVest
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Other income, net	5,474	7,220	13,704	13,105
Total Mortgage banking activities, net	9,928	16,461	17,157	27,363
CoreVest | Trading securities
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Fair value of loans	1,009	0	1,009	0
CoreVest | Residential investor term loans
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Fair value of loans	2,627	4,560	961	11,490
CoreVest | Residential investor bridge loans
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Fair value of loans	836	3,574	1,200	4,606
CoreVest | Risk management derivatives
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Risk management derivatives	$ (18)	$ 1,107	$ 283	$ (1,838)