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Pension Benefit Plan | 3 Months Ended
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Mar. 31, 2017
Compensation And Retirement Disclosure [Abstract] |
Pension Benefit Plan | 4. 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 months ended March 31, 2017 and 2016:
|  | Three Months Ended |
|  | March 31, |
(In thousands) |  | 2017 |  |  | 2016 |
Service cost |  | $ | 297 |  |  | $ | 297 |
Interest cost |  |  | 143 |  |  |  | 176 |
Expected return on plan assets |  |  | (299 | ) |  |  | (259 | )
Amortization of actuarial losses |  |  | 73 |  |  |  | 43 |
Net periodic pension cost |  | $ | 214 |  |  | $ | 257 |

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