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Warranty (Tables)
3 Months Ended
Mar. 31, 2013
Product Warranties Disclosures [Abstract]  
Changes in Warranty Reserve
The changes in warranty reserves for the three months ended March 31, 2013 and 2012 were as follows:
 
Three Months Ended
 
March 31

2013
 
2012
Beginning balance
$
9,357

 
$
8,759

Additions charged to expense
2,300

 
2,927

Foreign currency fluctuations
(81
)
 
53

Claims paid
(2,455
)
 
(2,929
)
Ending balance
$
9,121

 
$
8,810