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Retirement and Pension Plans
 6 Months Ended
Jun. 30, 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
June 30,		Six Months Ended
June 30,
2021202020212020
(In thousands)
Defined benefit plans:
Service cost$2,030 $1,929 $4,051 $3,879 
Interest cost4,581 5,600 9,148 11,236 
Expected return on plan assets(14,221)(13,558)(28,395)(27,208)
Amortization of net actuarial loss and other4,379 3,931 8,732 7,907 
Pension income(3,231)(2,098)(6,464)(4,186)
Other plans:
Defined contribution plans7,961 6,882 16,416 16,907 
Foreign plans and other2,123 1,832 4,357 3,873 
Total other plans10,084 8,714 20,773 20,780 
Total net pension expense$6,853 $6,616 $14,309 $16,594 
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 six months ended June 30, 2021 and 2020, contributions to the Company’s defined benefit pension plans were $4.1 million and $3.2 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 Note 12 of the Company’s Annual Report on Form 10-K for the year ended December 31, 2020.