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Pension Benefit Plan
 3 Months Ended
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