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Pensions and Other Postretirement Benefit Plans | 3 Months Ended
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Mar. 31, 2019
Retirement Benefits [Abstract] |
Pensions and Other Postretirement Benefit Plans | 4. Pensions and Other Postretirement Benefit Plans Pension Plans The Company has defined benefit pension plans covering certain U.S. and non-U.S. employees. The U.S. qualified defined benefit pension plan has been closed to new participants since October 1998, and benefits accrued under this plan have been frozen since February 2009. As a result of the freeze, employees covered by the pension plan will receive, at retirement, benefits already accrued through February 2009 but no new benefits accrue after that date. Benefit accruals under the U.S. Supplemental Executive Retirement Plan ("SERP") were similarly frozen. The eligibility, benefit formulas, and contribution requirements for plans outside of the U.S. vary by location. Other Postretirement Benefits The Company also provides certain postretirement benefits to retired employees in the U.S. and Canada. The Company accrues the cost of providing postretirement benefits during the active service period of the employees. The Company currently funds the plans as claims are paid. The composition of the net periodic benefit cost for the three months ended March 31, 2019 and 2018, was as follows:
| Pension plans |  | Other postretirement benefits
(in thousands) | 2019 | 2018 | 2019 | 2018
Components of net periodic benefit cost: |  |  |  |
Service cost | $632 | $699 | $47 | $58
Interest cost | 1,794 | 1,820 | 528 | 507
Expected return on assets | (2,057) | (2,247) | - | -
Amortization of prior service cost/(credit) | 17 | 8 | (1,122) | (1,122)
Amortization of net actuarial loss | 564 | 558 | 557 | 739
Net periodic benefit cost | $950 | $838 | $10 | $182
Service cost for defined benefit pension and postretirement plans are reported in the same line item or items as other compensation costs arising from services rendered by the pertinent employees during the period. Other components of net periodic benefit cost are presented in the income statement separately from the service cost component and outside a subtotal of income from operations, in the line item Other (income)/expense, net in the Consolidated Statements of Income.

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- Definition The entire disclosure for pension and other postretirement benefits. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -URI http://asc.fasb.org/topic&trid=2235017 + Details
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