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Pension and Other Postretirement Benefits
 3 Months Ended
Mar. 31, 2023
Retirement Benefits [Abstract]  
Pension and Other Postretirement Benefits Pension and Other Postretirement Benefits
Pension and other postretirement benefits (income) cost consisted of the following:
Three Months Ended
March 31,
Pensions20232022
Service cost$773 $1,555 
Interest cost4,895 3,434 
Expected return on plan assets(7,534)(7,281)
Amortization of prior service cost87 108 
Amortization of actuarial losses417 3,139 
Special termination benefits— 136 
Net periodic benefit (income) cost$(1,362)$1,091 

Three Months Ended
March 31,
Other Postretirement Benefits20232022
Service cost$13 $24 
Interest cost285 206 
Amortization of prior service cost3 — 
Amortization of actuarial (gains) losses(25)9 
Net periodic benefit cost$276 $239 

The service cost component of net periodic benefit cost is included within cost of sales and selling and administrative expenses. The components of net periodic benefit (income) cost other than the service cost component are included in Other income (expense) on the Condensed Consolidated Statements of Income. See Note 13.
In February 2023, the Company elected to freeze the benefits associated with one of its U.S-based defined benefit pension plans. Although the action was approved in February, future benefits are scheduled to cease effective December 31, 2023. Pursuant to the applicable accounting guidance, the Company performed an interim remeasurement of its pension plan assets and obligations and recognized a curtailment gain as of January 31, 2023, represented by a $11,324 of non-cash after-tax increase in stockholders equity (through other non-owner changes to equity). This increase in stockholders equity resulted from favorable variances between expected and actual returns on pension plan assets and the net incremental change in the benefit obligation as a result of the elimination of future benefit accruals, partially offset by the impacts of changes in actuarial assumptions, primarily a decrease in discount rates.