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Pension and Other Postretirement Benefits - Amounts Recognized in Balance Sheets (Details) - USD ($)
$ in Thousands
Dec. 31, 2022
Dec. 31, 2021
Amounts recognized in the balance sheets:    
Accrued benefit liability, noncurrent $ (67,828) $ (120,997)
Pension Plans    
Pension And Other Employee Benefit Plans [Line Items]    
Funded status, end of year (36,092) (77,808)
Amounts recognized in the balance sheets:    
Prepaid benefit cost 16,251 20,177
Accrued benefit liability, current (3,106) (3,173)
Accrued benefit liability, noncurrent (49,237) (94,812)
Net funded status (36,092) (77,808)
Other Plans    
Pension And Other Employee Benefit Plans [Line Items]    
Funded status, end of year (19,944) (27,625)
Amounts recognized in the balance sheets:    
Prepaid benefit cost 0 0
Accrued benefit liability, current (1,353) (1,440)
Accrued benefit liability, noncurrent (18,591) (26,185)
Net funded status $ (19,944) $ (27,625)