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Warranty (Tables)
 3 Months Ended
Mar. 31, 2016
Product Warranties Disclosures [Abstract]  
Changes in warranty reserve
The changes in warranty reserves for the three months ended March 31, 2016 and 2015 were as follows:
 
Three Months Ended
 
March 31
 
2016
 
2015
Beginning balance
$
10,093

 
$
9,686

Additions charged to expense
2,488

 
2,413

Foreign currency fluctuations
60

 
(167
)
Claims paid
(2,766
)
 
(2,498
)
Ending balance
$
9,875

 
$
9,434