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Pensions and Other Postretirement Benefit Plans
 9 Months Ended
Sep. 30, 2024
Retirement Benefits [Abstract]  
Pensions and Other Postretirement Benefit Plans Pensions and Other Postretirement Benefit Plans
The Company has defined benefit pension plans covering certain U.S. and non-U.S. employees. The Company also provides certain postretirement benefits to retired employees in the U.S. and Canada. The Company accrues the cost of providing these benefits during the active service period of the employees.
The composition of the net periodic benefit cost/(income) for the nine months ended September 30, 2024 and 2023, was as follows:
Pension plans
Other postretirement benefits
(in thousands)
2024202320242023
Components of net periodic benefit cost/(income):
Service cost
$1,473 $986 $35 $45 
Interest cost4,545 3,447 1,063 1,405 
Expected return on assets
(4,030)(3,063)— — 
Amortization of prior service cost/(income)(20)(24)(93)(3,068)
Amortization of net actuarial loss
556 421 (26)621 
Net periodic benefit cost/(credit)
$2,524 $1,767 $979 $(997)
The amount of net benefit cost/(credit) is determined at the beginning of each year and generally only varies from quarter to quarter when a significant event occurs, such as a curtailment or a settlement. There were no material curtailments or settlements during the first nine months of 2024 or 2023.
Service cost for defined benefit pension and postretirement plans are reported in the same line item as other compensation costs arising from services rendered by the pertinent employees during the period. Other components of net periodic benefit cost are included in the line item Other (income)/expense, net in the Consolidated Statements of Income.