Postretirement Benefits - Schedule of Information Regarding the SERP (Details) - USD ($) $ in Thousands |
Mar. 31, 2026 |
Dec. 31, 2025 |
|---|---|---|
| Total investments: | ||
| COLI | $ 59,479 | $ 59,008 |
| Exchange traded funds | 107,023 | 111,470 |
| Total investments of SERP | $ 166,502 | $ 170,478 |