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Pension Benefit Plan | 6 Months Ended
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Jun. 30, 2019
Compensation And Retirement Disclosure [Abstract] |
Pension Benefit Plan | 5. PENSION BENEFIT PLAN We maintain a defined benefit pension plan covering employees in certain foreign countries. The following table summarizes the components of net periodic pension cost for the three and six months ended June 30, 2019 and 2018:
|  | Three Months Ended |  |  | Six Months Ended |
|  | June 30, |  |  | June 30, |
(In thousands) |  | 2019 |  |  | 2018 |  |  | 2019 |  |  | 2018 |
Service cost |  | $ | 368 |  |  | $ | 303 |  |  | $ | 743 |  |  | $ | 611 |
Interest cost |  |  | 159 |  |  |  | 185 |  |  |  | 321 |  |  |  | 372 |
Expected return on plan assets |  |  | (348 | ) |  |  | (394 | ) |  |  | (703 | ) |  |  | (793 | )
Amortization of actuarial losses |  |  | 199 |  |  |  | 63 |  |  |  | 402 |  |  |  | 127 |
Net periodic pension cost |  | $ | 378 |  |  | $ | 157 |  |  | $ | 763 |  |  | $ | 317 |
The components of net periodic pension cost, other than the service cost component, are included in o ther income (expense), net in the Condensed Consolidated Statements of Income. Service cost are included in cost of sales, selling, gene ral and administrative expenses and research and development expenses in the Condensed 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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