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Pension Benefit Plan | 9 Months Ended
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Sep. 30, 2018
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 nine months ended September 30, 2018 and 2017:
|  | Three Months Ended |  |  | Nine Months Ended |
|  | September 30, |  |  | September 30, |
(In thousands) |  | 2018 |  |  | 2017 |  |  | 2018 |  |  | 2017 |
Service cost |  | $ | 294 |  |  | $ | 327 |  |  | $ | 905 |  |  | $ | 930 |
Interest cost |  |  | 179 |  |  |  | 158 |  |  |  | 551 |  |  |  | 448 |
Expected return on plan assets |  |  | (381 | ) |  |  | (329 | ) |  |  | (1,174 | ) |  |  | (935 | )
Amortization of actuarial losses |  |  | 61 |  |  |  | 80 |  |  |  | 188 |  |  |  | 228 |
Net periodic pension cost |  | $ | 153 |  |  | $ | 236 |  |  | $ | 470 |  |  | $ | 671 |
The components of net periodic pension cost other than the service cost component are included 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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