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Retirement and Pension Plans
 3 Months Ended
Mar. 31, 2024
Retirement Benefits [Abstract]  
Retirement and Pension Plans Retirement and Pension Plans
The components of net periodic pension benefit expense (income) were as follows:
Three Months Ended
March 31,
20242023
(In thousands)
Defined benefit plans:
Service cost$730 $740 
Interest cost6,989 7,501 
Expected return on plan assets(13,632)(12,996)
Amortization of net actuarial loss and other2,337 2,821 
Pension income(3,576)(1,934)
Other plans:
Defined contribution plans14,595 13,516 
Foreign plans and other1,689 2,571 
Total other plans16,284 16,087 
Total net pension expense$12,708 $14,153 
For defined benefit plans, the net periodic benefit income, other than the service cost component, is included in “Other (expense) income, net” in the consolidated statement of income.
For the three months ended March 31, 2024 and 2023, contributions to the Company’s defined benefit pension plans were $1.5 million and $1.4 million, respectively. The Company’s current estimate of 2024 contributions to its worldwide defined benefit pension plans is in line with the range disclosed in Note 12 of the Company’s Annual Report on Form 10-K for the year ended December 31, 2023.