Residential Consumer Loans - Schedule of Characteristics of Residential Consumer Loans Held-for-Sale (Details) - Residential consumer loans - USD ($) $ in Thousands	Dec. 31, 2025	Dec. 31, 2024
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
UPB	$ 3,022,360	$ 1,000,663
Fair value of loans	3,092,014	1,013,547
Market value of loans pledged as collateral under short-term borrowing agreements	$ 3,066,067	$ 1,005,926
Weighted average coupon	6.59%	6.56%