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Other Expense, Net (Tables)
 6 Months Ended
Jun. 30, 2018
Other Income and Expenses [Abstract]  
Details of Components of Other Income Expense, Net
The components of other expense, net were as follows:
 
Three Months Ended June 30,
 
Six Months Ended June 30,
 
2018
 
2017
 
2018
 
2017
Foreign currency losses
$
(121
)
 
$
(1,906
)
 
$
(1,709
)
 
$
(2,578
)
Components of net periodic benefit cost other than service cost
(196
)
 
(536
)
 
(433
)
 
(1,033
)
Losses on sales of receivables
(392
)
 
(342
)
 
(717
)
 
(560
)
Miscellaneous income
152

 
63

 
583

 
313

Other expense, net
$
(557
)
 
$
(2,721
)
 
$
(2,276
)
 
$
(3,858
)