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Financial Guarantee Liability - Narrative (Details) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2024 USD ($) loan | Mar. 31, 2023 USD ($) | Dec. 31, 2023 USD ($) loan | Dec. 31, 2022 USD ($)
Guarantor Obligations |  |  |  |
Outstanding loan balances | $ 29,800,000 |  | $ 29,100,000 |
Maximum loss potential | 9,200,000 |  | 9,000,000 |
Provision (reversal) for expected credit losses | $ 1,251 | $ 2,800 | 2,634 |
Delinquency threshold period | 60 days |  |  |
Financial guarantee liability, settlement loss |  |  |  | $ 1,200
Financial guarantee liability, settlement loss, write off |  |  |  | $ 600
Delinquent |  |  |  |
Guarantor Obligations |  |  |  |
Outstanding loan balances | $ 7,300 |  | 7,300 |
Maximum loss potential | $ 2,400 |  | 2,400 |
Number of loans | loan | 1 |  |  |
Liquidation value of loans outstanding | $ 7,400 |  | 7,500 |
Potential loss on liquidation of loan | $ 500 |  | $ 500 |
Foreclosure |  |  |  |
Guarantor Obligations |  |  |  |
Number of loans | loan |  |  | 1 |
Fannie Mae DUS or Freddie TAH Loans | Maximum |  |  |  |
Guarantor Obligations |  |  |  |
Percentage of contingent liability of actual losses incurred on outstanding loans | 33.00% |  |  |

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