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Retirement Plans, Components of Net Periodic Benefit Cost, Pension Benefits (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Components of net periodic benefit cost [Abstract] |  |  |
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Interest Cost, Statement of Income or Comprehensive Income [Extensible Enumeration] | Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, after Tax | Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, after Tax | Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, after Tax
Defined Benefit Plan, Net Periodic Benefit (Cost) Credit, Expected Return (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration] | Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, after Tax | Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, after Tax | Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, after Tax
Defined Benefit Plan, Net Periodic Benefit (Cost) Credit, Amortization of Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration] | Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, after Tax | Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, after Tax | Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, after Tax
Other changes in plan assets and benefit obligations recognized in other comprehensive income [Abstract] |  |  |
Recognition of actuarial loss | $ (58,147) | $ (44,491) | $ 31,755
Pension Plan [Member] |  |  |
Components of net periodic benefit cost [Abstract] |  |  |
Service cost | 6,538 | 7,961 | 7,671
Interest cost | 14,779 | 14,239 | 15,630
Expected return on plan assets | (28,399) | (26,244) | (23,790)
Amortization of actuarial loss | 34 | 4,193 | 2,399
Net periodic benefit cost | 7,048 | 149 | 1,910
Other changes in plan assets and benefit obligations recognized in other comprehensive income [Abstract] |  |  |
Current year actuarial (gain) loss | 58,015 | (44,583) | 31,616
Recognition of actuarial loss | 34 | (4,193) | (2,399)
Total recognized in other comprehensive income | 58,049 | (48,776) | 29,217
Total recognized in net periodic benefit cost and other comprehensive income | 65,097 | (48,627) | 31,127
SERP [Member] |  |  |
Components of net periodic benefit cost [Abstract] |  |  |
Service cost | 0 | 0 | 0
Interest cost | 29 | 31 | 40
Expected return on plan assets | 0 | 0 | 0
Amortization of actuarial loss | 30 | 40 | 35
Net periodic benefit cost | 59 | 71 | 75
Other changes in plan assets and benefit obligations recognized in other comprehensive income [Abstract] |  |  |
Current year actuarial (gain) loss | 74 | (12) | 55
Recognition of actuarial loss | 30 | (40) | (35)
Total recognized in other comprehensive income | 104 | (52) | 20
Total recognized in net periodic benefit cost and other comprehensive income | $ 45 | $ 19 | $ 95

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