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Retirement and Pension Plans
 3 Months Ended
Mar. 31, 2021
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,
20212020
(In thousands)
Defined benefit plans:
Service cost$2,021 $1,950 
Interest cost4,567 5,636 
Expected return on plan assets(14,174)(13,650)
Amortization of net actuarial loss and other4,353 3,976 
Pension income(3,233)(2,088)
Other plans:
Defined contribution plans8,455 10,025 
Foreign plans and other2,234 2,041 
Total other plans10,689 12,066 
Total net pension expense$7,456 $9,978 
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, 2021 and 2020, contributions to the Company’s defined benefit pension plans were $2.0 million and $1.5 million, respectively. The Company’s current estimate of 2021 contributions to its worldwide defined benefit pension plans is in line with the range disclosed in the Company’s Annual Report on Form 10-K for the year ended December 31, 2020.