Investments (Roll Forward of Cumulative Credit Losses Recorded in Earnings) (Details) - USD ($) $ in Thousands |
3 Months Ended | 9 Months Ended | ||
|---|---|---|---|---|
Sep. 30, 2024 |
Sep. 30, 2023 |
Sep. 30, 2024 |
Sep. 30, 2023 |
|
| Other than Temporary Impairment, Credit Losses Recognized in Earnings [Roll Forward] | ||||
| Balance beginning of period | $ 1,267 | $ 57 | $ 57 | $ 57 |
| Additional credit losses recognized during the period, related to securities for which: | ||||
| No impairment has been previously recognized | 0 | 0 | 740 | 0 |
| Impairment has been previously recognized | 0 | 0 | 470 | 0 |
| Balance ending of period | $ 1,267 | $ 57 | $ 1,267 | $ 57 |