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Home Equity Investments (HEI) - HEI Characteristics (Details) $ in Thousands | Mar. 31, 2023 USD ($) Contract | Dec. 31, 2022 USD ($) Contract
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HEIs |  |
Schedule of Equity Method Investments [Line Items] |  |
Number of HEI contracts | Contract | 2,695 | 2,599
Average initial amount of contract | $ | $ 101 | $ 101
Securitized HEI |  |
Schedule of Equity Method Investments [Line Items] |  |
Number of HEI contracts | Contract | 984 | 1,007
Average initial amount of contract | $ | $ 94 | $ 94

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