Residential Investor Loans - Schedule of Activity of Unsecuritized Investor Loans (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]
Principal balance of loans originated			$ 12,952,750	$ 5,210,370
Principal balance of loans sold to third parties			833	537
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	$ 29,000	$ 16,000	58,000	32,000
Unsecuritized Term
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Principal balance of loans originated	186,557	228,545	354,147	416,763
Principal balance of loans acquired	273	36,237	5,851	43,037
Principal balance of loans sold to third parties	179,363	250,795	476,161	433,210
Transfer of loans between portfolios	0	0	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	223,660	141,756	488,492	407,900
Principal balance of loans acquired	0	25,233	0	25,233
Principal balance of loans sold to third parties	195,505	226,081	592,798	382,574
Transfer of loans between portfolios	$ 129,587	$ 75,994	$ 204,334	$ 126,613