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Warranty (Tables)
9 Months Ended
Sep. 30, 2017
Product Warranties Disclosures [Abstract]  
Changes in warranty reserve
The changes in warranty reserves for the nine months ended September 30, 2017 and 2016 were as follows:
 
Nine Months Ended
 
September 30
 
2017
 
2016
Beginning balance
$
10,960

 
$
10,093

Additions charged to expense
8,879

 
8,888

Acquired warranty obligations
384

 

Foreign currency fluctuations
225

 
85

Claims paid
(8,912
)
 
(8,707
)
Ending balance
$
11,536

 
$
10,359