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Benefit Plan Schedule of Plan Assets (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Defined Benefit Plan Disclosure [Line Items] |  |  |
Defined Benefit Plan, Plan Assets, Amount | $ 209,138 | $ 263,473 | $ 230,442
Defined Benefit Plan, Service Cost | 9,749 | 9,916 | 8,319
Defined Benefit Plan, Interest Cost | 5,705 | 5,359 | 5,283
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) | 2,359 | (1,764) | (367)
Supplemental Executive Retirement Plan (SERP) |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Defined Benefit Plan, Service Cost | 1,091 | 1,345 | 1,680
Defined Benefit Plan, Interest Cost | 564 | 510 | 403
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) | (1,655) | (1,855) | $ (2,083)
Level 1 |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Defined Benefit Plan, Plan Assets, Amount | 180,153 | 226,673 |
Level 1 | Defined Benefit Plan, Cash |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Defined Benefit Plan, Plan Assets, Amount | 1,959 | 3,222 |
Level 1 | Defined Benefit Plan, Equity Securities, US |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Defined Benefit Plan, Plan Assets, Amount | 132,101 | 162,464 |
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 | 46,093 | 60,987 |
Level 2 |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Defined Benefit Plan, Plan Assets, Amount | 28,985 | 36,800 |
Level 2 | Defined Benefit Plan, Cash |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Defined Benefit Plan, Plan Assets, Amount | 3,910 | 4,731 |
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 | 12,513 | 15,254 |
Level 2 | Corporate Debt Securities |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Defined Benefit Plan, Plan Assets, Amount | 12,562 | 16,815 |
Level 2 | Mutual Fund |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Defined Benefit Plan, Plan Assets, Amount | $ 0 | $ 0 |

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