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Pension and Other Postretirement Benefits - Amounts Recognized in Balance Sheets (Details) - USD ($) $ in Thousands | Dec. 31, 2023 | Dec. 31, 2022
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Amounts recognized in the balance sheets: |  |
Accrued benefit liability, noncurrent | $ (74,573) | $ (67,828)
Pension Plans |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Funded status, end of year | (41,381) | (36,092)
Amounts recognized in the balance sheets: |  |
Prepaid benefit cost | 16,358 | 16,251
Accrued benefit liability, current | (3,051) | (3,106)
Accrued benefit liability, noncurrent | (54,688) | (49,237)
Net funded status | (41,381) | (36,092)
Other Plans |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Funded status, end of year | (21,312) | (19,944)
Amounts recognized in the balance sheets: |  |
Prepaid benefit cost | 0 | 0
Accrued benefit liability, current | (1,427) | (1,353)
Accrued benefit liability, noncurrent | (19,885) | (18,591)
Net funded status | $ (21,312) | $ (19,944)

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