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Home Equity Investments (HEI) - HEI Characteristics (Details) $ in Thousands	Sep. 30, 2023 USD ($) Contract	Dec. 31, 2022 USD ($) Contract
HEI at Redwood
Schedule of Equity Method Investments [Line Items]
Number of HEI contracts | Contract	2,644	2,599
Average initial amount of contract | $	$ 103	$ 101
Securitized HEI
Schedule of Equity Method Investments [Line Items]
Number of HEI contracts | Contract	929	1,007
Average initial amount of contract | $	$ 95	$ 94

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 235
-SubTopic 10
-Name Accounting Standards Codification
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Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 323
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Reference 3: http://www.xbrl.org/2003/role/disclosureRef
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Reference 4: http://www.xbrl.org/2003/role/disclosureRef
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-Topic 323
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-Section 50
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