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Pension and Other Postretirement Benefits (Tables)
 12 Months Ended
Dec. 31, 2024
Retirement Benefits [Abstract]  
Schedule of Change in Benefit Obligation
The following tables provide a reconciliation of the changes in the plans’ benefit obligations and fair value of assets as well as a statement of the funded status and balance sheet reporting for these plans.

 Pension BenefitsOther Benefits
Years Ended December 31,2024202320242023
  (In thousands) 
Change in benefit obligation:
Benefit obligation, beginning of year$(342,759)$(317,424)$(21,312)$(19,944)
Service cost(3,131)(2,632)(39)(11)
Interest cost(14,759)(15,237)(949)(1,012)
Participant contributions(424)(435)(3)(3)
Actuarial gain (loss)25,815 (16,231)(175)(1,179)
Settlements8,338 2,987 — — 
       Plan amendments104 — — — 
Foreign currency exchange rate changes7,681 (12,427)1,549 (492)
Benefits paid15,706 18,640 1,405 1,329 
Benefit obligation, end of year$(303,429)$(342,759)$(19,524)$(21,312)
Schedule of Change in Plan Assets
 Pension BenefitsOther Benefits
Years Ended December 31,2024202320242023
  (In thousands) 
Change in plan assets:
Fair value of plan assets, beginning of year$301,378 $281,332 $— $— 
Actual return on plan assets641 21,141 — — 
Employer contributions10,427 8,432 1,402 1,326 
Plan participant contributions424 435 3 3 
Settlements(8,292)(2,987)— — 
Foreign currency exchange rate changes(5,696)11,665 — — 
Benefits paid(15,706)(18,640)(1,405)(1,329)
Fair value of plan assets, end of year$283,176 $301,378 $— $— 
Schedule of Amounts Recognized in Balance Sheets
Funded status, end of year$(20,253)$(41,381)$(19,524)$(21,312)
Amounts recognized in the balance sheets:
Prepaid benefit cost$27,842 $16,358 $— $— 
Accrued benefit liability, current(2,969)(3,051)(1,390)(1,427)
Accrued benefit liability, noncurrent(45,126)(54,688)(18,134)(19,885)
Net funded status$(20,253)$(41,381)$(19,524)$(21,312)
Schedule of Components of Net Periodic Benefit Costs
The following table provides the components of net periodic benefit costs for the plans.
 Pension BenefitsOther Benefits
Years Ended December 31,202420232022202420232022
   (In thousands)  
Components of net periodic benefit cost:
Service cost$3,131 $2,632 $3,491 $39 $11 $24 
Interest cost14,759 15,237 9,248 949 1,012 761 
Expected return on plan assets(16,299)(16,512)(16,023)— — — 
Amortization of prior service cost180 176 174 — — — 
Settlement loss (gain)1,147 (101)1,189 — — — 
Net loss (gain) recognition(110)(938)734 (411)(737)(73)
Net periodic benefit cost (income)$2,808 $494 $(1,187)$577 $286 $712 
Schedule of Assumptions Used in Determining Benefit Obligations and Net Periodic Benefit Cost Amounts
The following table presents the assumptions used in determining the benefit obligations and the net periodic benefit cost amounts.
 Pension BenefitsOther Benefits
Years Ended December 31,Years Ended December 31,
2024202320242023
Weighted average assumptions for benefit obligations at year end:
Discount rate5.1 %4.5 %4.7 %4.7 %
Salary increase3.2 %3.2 %N/AN/A
Cash balance interest credit rate4.4 %4.4 %N/AN/A
Weighted average assumptions for net periodic cost for the year:
Discount rate4.5 %4.9 %4.7 %5.2 %
Salary increase3.2 %3.2 %N/AN/A
Cash balance interest credit rate4.4 %4.5 %N/AN/A
Expected return on assets5.2 %5.2 %N/AN/A
Assumed health care cost trend rates:
Health care cost trend rate assumed for next yearN/AN/A5.1 %5.2 %
Rate that the cost trend rate gradually declines toN/AN/A4.6 %4.6 %
Year that the rate reaches the rate it is assumed to remain atN/AN/A20282028
Schedule of Fair Values of Pension Plan Assets by Asset Category
The following table presents the fair values of the pension plan assets by asset category. 
 December 31, 2024December 31, 2023
 Fair Market Value at December 31, 2024Quoted  Prices
in Active
Markets for
Identical
Assets
(Level 1)		Significant
Observable
Inputs
(Level 2)		Investments Measured at Net Asset ValueFair Market Value at December 31, 2023Quoted  Prices
in Active
Markets for
Identical
Assets
(Level 1)		Significant
Observable
Inputs
(Level 2)		Investments Measured at Net Asset Value
 (In thousands)(In thousands)
Asset Category:
Equity securities(a)
U.S. equities fund$40,260 $— $— $40,260 $34,966 $— $— $34,966 
Non-U.S. equities fund37,321 — — 37,321 35,939 — — 35,939 
Debt securities(b)
Government bond fund63,502 — — 63,502 77,480 — — 77,480 
Corporate bond fund62,950 — — 62,950 62,456 — — 62,456 
Fixed income fund(c)20,348 — — 20,348 22,673 — — 22,673 
Liability driven investment fund(d)43,354 — — 43,354 51,412 — — 51,412 
Other investments(e)7,382 — — 7,382 9,565 — — 9,565 
Cash and equivalents8,059 3,404 — 4,655 6,887 2,662 — 4,225 
Total$283,176 $3,404 $— $279,772 $301,378 $2,662 $— $298,716 
 
(a)This category includes investments in actively managed and indexed investment funds that invest in a diversified pool of equity securities of companies located in the U.S., Canada, Western Europe and other developed countries throughout the world. The funds are valued using the net asset value method in which an average of the market prices for the underlying investments is used to value the fund. Equity securities held in separate accounts are valued based on observable quoted prices on active exchanges.
(b)This category includes investments in investment funds that invest in U.S. treasuries; other national, state and local government bonds; and corporate bonds of highly rated companies from diversified industries. The funds are valued using the net asset value method in which an average of the market prices for the underlying investments is used to value the fund.
(c)This category includes guaranteed insurance contracts and annuity policies.
(d)This category includes investments in funds that are designed to provide leveraged exposure to changes in interest rates. The fund purchases shares of funds that invest in government bonds, debt repurchase agreements, total return swaps and interest rate swaps.
(e)This category includes investments in hedge funds that pursue multiple strategies in order to provide diversification and balance risk/return objectives, real estate funds, and private equity funds.
Schedule of Benefits Expected to be Paid in Subsequent Years from Our Pension and Other Postretirement as Well as Medicare Subsidy Receipts
The following table reflects the benefits as of December 31, 2024 expected to be paid in each of the next five years and in the aggregate for the five years thereafter from our pension and other postretirement plans. Because our other postretirement plans are unfunded, the anticipated benefits with respect to these plans will come from our own assets. Because our pension plans are primarily funded plans, the anticipated benefits with respect to these plans will come primarily from the trusts established for these plans. 
Pension
Plans		Other
Plans
 (In thousands)
2025$20,449 $1,424 
202620,417 1,409 
202720,756 1,401 
202823,151 1,405 
202922,820 1,397 
2029-2033103,486 6,892 
Total$211,079 $13,928 
Schedule of Accumulated Other Comprehensive Loss and Changes in these Amounts
The pre-tax amounts in accumulated other comprehensive loss that have not yet been recognized as components of net periodic benefit cost at December 31, 2024 and the changes in these amounts during the year ended December 31, 2024 are as follows. 
Pension
Benefits		Other
Benefits
 (In thousands)
Components of accumulated other comprehensive loss:
Net actuarial loss (gain)$13,120 $(4,398)
Net prior service cost1,831 — 
$14,951 $(4,398)
Pension
Benefits		Other
Benefits
 (In thousands)
Changes in accumulated other comprehensive loss:
Net actuarial loss (gain), beginning of year$24,298 $(5,322)
Amortization of actuarial gain110 411 
Actuarial loss (gain)(25,815)175 
Asset loss15,658 — 
Settlement loss recognized(1,147)— 
Currency impact16 338 
Net actuarial loss (gain), end of year$13,120 $(4,398)
Prior service cost, beginning of year$2,148 $— 
Amortization of prior service cost(180)— 
Prior service credit occurring during the year(104)— 
Currency impact(33)— 
Prior service cost, end of year$1,831 $—