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Warranty (Tables)
3 Months Ended
Mar. 31, 2014
Product Warranties Disclosures [Abstract]  
Changes in warranty reserve
The changes in warranty reserves for the three months ended March 31, 2014 and 2013 were as follows:
 
Three Months Ended
 
March 31
 
2014
 
2013
Beginning balance
$
9,663

 
$
9,357

Additions charged to expense
2,131

 
2,300

Foreign currency fluctuations
22

 
(81
)
Claims paid
(2,358
)
 
(2,455
)
Ending balance
$
9,458

 
$
9,121