Residential Consumer Loans - Schedule of Activity of Residential Consumer Loans Held-for-Investment at Consolidated Entities (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Principal value of loans transferred from HFS to HFI	$ 8,811,765	$ 5,702,565	$ 2,789,507
Held-for-investment at fair value | Net investments in Sequoia Choice entities
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Net market valuation gains (losses) recorded	343,872	(18,816)
Held-for-investment at fair value | Net investments in Sequoia Choice entities
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Principal value of loans transferred from HFS to HFI	8,504,707	$ 5,208,677
Securitized Re-Performing Loans | Net investments in Sequoia Choice entities
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Net market valuation gains (losses) recorded	$ 64,000