Reserves for Unpaid Losses and Loss Adjustment Expenses - Narrative (Details) - USD ($) $ in Thousands |
9 Months Ended | |
|---|---|---|
Sep. 30, 2026 |
Sep. 30, 2025 |
|
| Causes of Increase (Decrease) in Liability for Unpaid Claims and Claims Adjustment Expense [Line Items] | ||
| Prior year reserve reduction | $ 5,669 | $ 0 |
| Current year incurred losses and loss adjustment expenses | $ 304,558 | 224,969 |
| Southern California | ||
| Causes of Increase (Decrease) in Liability for Unpaid Claims and Claims Adjustment Expense [Line Items] | ||
| Current year incurred losses and loss adjustment expenses | $ 10,300 | |