Defined Pension Plans - Narrative (Details) - USD ($) $ in Thousands |
3 Months Ended | 9 Months Ended | 12 Months Ended | ||
|---|---|---|---|---|---|
Sep. 30, 2025 |
Sep. 30, 2024 |
Sep. 30, 2025 |
Sep. 30, 2024 |
Dec. 31, 2024 |
|
| Defined Benefit Plan Disclosure [Line Items] | |||||
| Net periodic cost (benefit) | $ 0 | $ 195 | $ 0 | $ 581 | |
| Proceeds from sales of investment securities available-for-sale | 72,700 | 0 | 125,815 | 24,985 | |
| Available-for-sale securities, gross realized gains | 351,000 | 0 | 351,000 | 0 | |
| Pension Plan | |||||
| Defined Benefit Plan Disclosure [Line Items] | |||||
| Net periodic cost (benefit) | 0 | 195 | 0 | 581 | |
| Supplemental Employee Retirement Plan | |||||
| Defined Benefit Plan Disclosure [Line Items] | |||||
| Net periodic cost (benefit) | $ 113 | $ 113 | $ 338 | $ 338 | $ 450 |