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Retirement Benefit Plans
 3 Months Ended
Mar. 31, 2017
Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Abstract]  
Retirement Benefit Plans
13.
Retirement Benefit Plans
Our defined benefit pension plans and postretirement medical plan are described in Note 13 of our annual report on Form 10-K for the year ended December 31, 2016. We have contributed $79 and $209 during the first quarter of 2017 to our pension plans and postretirement medical plan, respectively.
The components of the net periodic (benefit) cost for the three months ended March 31, 2017 and 2016 were as follows:
 
 
Three Months Ended
 
 
March 31
 
 
Pension Benefits
 
Postretirement
 
 
U.S. Plans
 
Non-U.S. Plans
 
Medical Benefits
 
 
2017
 
2016
 
2017
 
2016
 
2017
 
2016
Service cost
 
$
—

 
$
80

 
$
24

 
$
36

 
$
20

 
$
24

Interest cost
 
390

 
415

 
90

 
105

 
91

 
99

Expected return on plan assets
 
(585
)
 
(597
)
 
(96
)
 
(97
)
 
—

 
—

Amortization of net actuarial loss
 
10

 
9

 
—

 
—

 
—

 
—

Amortization of prior service cost
 
—

 
11

 
47

 
32

 
—

 
—

Foreign currency
 
—

 
—

 
(5
)
 
40

 
—

 
—

Net periodic (benefit) cost
 
$
(185
)
 
$
(82
)
 
$
60

 
$
116

 
$
111

 
$
123