Pension Plans and Other Postretirement Benefits - Financial Assets Accounted for at Fair Value on Recurring Basis (Details) - Pension Plans - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	$ 539,712	$ 549,645
Fair Value, Inputs, Level 1, 2 and 3 | Domestic Equity
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	78,124	58,906
Fair Value, Inputs, Level 1, 2 and 3 | International Equity
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	78,124	106,491
Fair Value, Inputs, Level 1, 2 and 3 | Fixed income
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	318,036	294,140
Fair Value, Inputs, Level 1, 2 and 3 | Cash
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	8,540	9,566
Quoted Prices in Active Markets for Identical Items (Level 1)
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	442,684	425,203
Quoted Prices in Active Markets for Identical Items (Level 1) | Domestic Equity
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	78,124	58,906
Quoted Prices in Active Markets for Identical Items (Level 1) | International Equity
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	69,471	99,432
Quoted Prices in Active Markets for Identical Items (Level 1) | Fixed income
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	286,549	257,299
Quoted Prices in Active Markets for Identical Items (Level 1) | Cash
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	8,540	9,566
Quoted Prices in Active Markets for Similar Items (Level 2)
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	40,140	43,900
Quoted Prices in Active Markets for Similar Items (Level 2) | Domestic Equity
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Quoted Prices in Active Markets for Similar Items (Level 2) | International Equity
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	8,653	7,059
Quoted Prices in Active Markets for Similar Items (Level 2) | Fixed income
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	31,487	36,841
Quoted Prices in Active Markets for Similar Items (Level 2) | Cash
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Unobservable Inputs (Level 3)
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Unobservable Inputs (Level 3) | Domestic Equity
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Unobservable Inputs (Level 3) | International Equity
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Unobservable Inputs (Level 3) | Fixed income
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Unobservable Inputs (Level 3) | Cash
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Absolute Return Measured at Net Asset Value
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	$ 56,888	$ 80,542