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Pension and Other Postretirement Benefit Plans - Assets that are Carried at Fair Value, and the Method Used to Determine Fair Value (Details) - USD ($) $ in Thousands | 12 Months Ended |  |
--- | --- | --- | ---
Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Long Corporate Bond Fund [Member] |  |  |
Pooled Separate Accounts |  |  |
Average duration of bonds | 3 months |  |
Retirement Plan [Member] |  |  |
Pooled Separate Accounts |  |  |
Plan Investments | $ 17,922 | $ 19,220 | $ 19,065
Retirement Plan [Member] | Long Duration Bond Fund [Member] |  |  |
Pooled Separate Accounts |  |  |
Plan Investments | 4,349 | 4,842 |
Retirement Plan [Member] | Long Corporate Bond Fund [Member] |  |  |
Pooled Separate Accounts |  |  |
Plan Investments | 3,496 | 3,907 |
Retirement Plan [Member] | Prudential Short-term [Member] |  |  |
Pooled Separate Accounts |  |  |
Plan Investments | 271 | 363 |
Retirement Plan [Member] | Investment Grade Bond Fund [Member] |  |  |
Pooled Separate Accounts |  |  |
Plan Investments | $ 9,806 | $ 10,108 |

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