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Losses and LAE - Reserve for Losses and LAE by Segment (Details) - USD ($) $ in Thousands | Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
--- | --- | --- | --- | ---
Liability for Claims and Claims Adjustment Expense [Line Items] |  |  |  |
Total gross reserve for losses and LAE | $ 360,326 | $ 370,148 |  |
Mortgage insurance |  |  |  |
Liability for Claims and Claims Adjustment Expense [Line Items] |  |  |  |
Total gross reserve for losses and LAE | 354,431 | 364,923 | $ 420,955 | $ 823,136
Title Insurance |  |  |  |
Liability for Claims and Claims Adjustment Expense [Line Items] |  |  |  |
Total gross reserve for losses and LAE | 5,895 | 5,225 |  |
Primary case | Mortgage insurance |  |  |  |
Liability for Claims and Claims Adjustment Expense [Line Items] |  |  |  |
Total gross reserve for losses and LAE | 336,553 | 344,235 |  |
Primary IBNR and LAE | Mortgage insurance |  |  |  |
Liability for Claims and Claims Adjustment Expense [Line Items] |  |  |  |
Total gross reserve for losses and LAE | 13,399 | 12,177 |  |
Pool and other | Mortgage insurance |  |  |  |
Liability for Claims and Claims Adjustment Expense [Line Items] |  |  |  |
Total gross reserve for losses and LAE | $ 4,479 | $ 8,511 |  |

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