Residential Consumer Loans - Schedule of Activity of Residential Consumer Loans Held-for-Sale (Details) - Residential Consumer Loans - 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 acquired	$ 6,581,837	$ 2,337,185
Principal balance of loans sold	1,570,549	420,513
Principal balance of loans transferred from HFS to HFI	4,589,492	1,623,900
Unconsolidated Aspire Securitization
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Principal balance of loans sold	$ 391,277	$ 0