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Residential Loans - Quarterly Activity of Residential Loans Held-for-Sale (Details) - Residential Loans $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022 USD ($) securitization	Jun. 30, 2021 USD ($)	Jun. 30, 2022 USD ($) securitization	Jun. 30, 2021 USD ($)
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Principal balance of loans acquired	$ 1,145,450	$ 3,484,633	$ 3,260,641	$ 6,580,681
Principal balance of loans sold	1,238,327	3,324,919	3,065,691	5,600,751
Principal balance of loans transferred to HFI	0	0	687,192	0
Net market valuation gains (losses) recorded	(32,527)	$ 26,278	(63,978)	$ 49,707
Legacy Sequoia
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Principal balance of loans acquired	$ 0		$ 102,000
Number of seasoned securities | securitization	0		3

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For each line item in the statement of financial position, the amounts of gains and losses from fair value changes included in earnings.

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 30
-Subparagraph (a)
-URI https://asc.fasb.org/extlink&oid=123596393&loc=d3e14172-108612

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