Residential Investor Loans - Schedule of Activity of Unsecuritized Investor Loans (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2026	Mar. 31, 2025
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Principal balance of loans originated	$ 6,705,199	$ 2,363,479
Principal balance of loans sold to third parties	483	258
Residential Investor Bridge
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Principal balance of loans sold to third parties	28,000	16,000
Unsecuritized Term
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Principal balance of loans originated	167,590	188,218
Principal balance of loans acquired	5,578	6,800
Principal balance of loans sold to third parties	296,798	182,415
Transfer of loans between portfolios	0	0
Unsecuritized Bridge
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Principal balance of loans originated	264,832	266,144
Principal balance of loans acquired	0	0
Principal balance of loans sold to third parties	397,293	156,493
Transfer of loans between portfolios	$ 74,747	$ 50,619