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Benefit Plan Schedule of Plan Assets and Net Benefit Costs (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Defined Benefit Plan Disclosure [Line Items] |  |  |
Defined Benefit Plan, Plan Assets, Amount | $ 232,894 | $ 209,138 | $ 263,473
Defined Benefit Plan, Service Cost | 6,236 | 9,749 | 9,916
Defined Benefit Plan, Interest Cost | 6,523 | 5,705 | 5,359
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) | 1,336 | 2,359 | (1,764)
Supplemental Executive Retirement Plan (SERP) |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Defined Benefit Plan, Service Cost | 1,224 | 1,091 | 1,345
Defined Benefit Plan, Interest Cost | 567 | 564 | 510
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) | (1,791) | (1,655) | $ (1,855)
Level 1 |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Defined Benefit Plan, Plan Assets, Amount | 200,098 | 180,153 |
Level 1 | Defined Benefit Plan, Cash |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Defined Benefit Plan, Plan Assets, Amount | 1,395 | 1,959 |
Level 1 | Defined Benefit Plan, Equity Securities, US |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Defined Benefit Plan, Plan Assets, Amount | 148,963 | 132,101 |
Level 1 | Obligations of U.S. Treasury and other U.S. Government sponsored entities |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Defined Benefit Plan, Plan Assets, Amount | 0 | 0 |
Level 1 | Corporate Debt Securities |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Defined Benefit Plan, Plan Assets, Amount | 0 | 0 |
Level 1 | Mutual Fund |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Defined Benefit Plan, Plan Assets, Amount | 49,740 | 46,093 |
Level 2 |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Defined Benefit Plan, Plan Assets, Amount | 32,796 | 28,985 |
Level 2 | Defined Benefit Plan, Cash |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Defined Benefit Plan, Plan Assets, Amount | 4,758 | 3,910 |
Level 2 | Defined Benefit Plan, Equity Securities, US |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Defined Benefit Plan, Plan Assets, Amount | 0 | 0 |
Level 2 | Obligations of U.S. Treasury and other U.S. Government sponsored entities |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Defined Benefit Plan, Plan Assets, Amount | 12,466 | 12,513 |
Level 2 | Corporate Debt Securities |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Defined Benefit Plan, Plan Assets, Amount | 15,572 | 12,562 |
Level 2 | Mutual Fund |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Defined Benefit Plan, Plan Assets, Amount | $ 0 | $ 0 |

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