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Pension Benefit Plan | 3 Months Ended
--- | ---
Mar. 31, 2021
Compensation And Retirement Disclosure [Abstract] |
Pension Benefit Plan | 5. PENSION BENEFIT PLAN The following table summarizes the components of net periodic pension cost related to a defined benefit pension plan covering employees in certain foreign countries:
|  | For the Three Months Ended |
|  | March 31, |
(In thousands) |  | 2021 |  |  | 2020 |
Service cost |  | $ | 314 |  |  | $ | 310 |
Interest cost |  |  | 87 |  |  |  | 108 |
Expected return on plan assets |  |  | (471 | ) |  |  | (410 | )
Amortization of actuarial losses |  |  | 278 |  |  |  | 237 |
Net periodic pension cost |  | $ | 208 |  |  | $ | 245 |
The components of net periodic pension cost, other than the service cost component, are included in other income (expense), net in the Condensed Consolidated Statements of Income (Loss). Service cost is included in cost of revenue, selling, general and administrative expenses and research and development expenses in the Condensed Consolidated Statements of Income (Loss).

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