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Retirement Benefit Plans (Tables)
 3 Months Ended
Mar. 31, 2017
Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Abstract]  
Components of the net periodic (benefit) cost
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