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Warranty (Tables)
9 Months Ended
Sep. 30, 2018
Product Warranties Disclosures [Abstract]  
Changes in warranty reserve
The changes in warranty reserves for the nine months ended September 30, 2018 and 2017 were as follows:
 
Nine Months Ended
 
September 30
 
2018
 
2017
Beginning balance
$
12,676

 
$
10,960

Additions charged to expense
10,883

 
8,879

Acquired warranty obligations

 
384

Foreign currency fluctuations
(193
)
 
225

Claims paid
(9,805
)
 
(8,912
)
Ending balance
$
13,561

 
$
11,536