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Warranty Reserves
 12 Months Ended
Dec. 31, 2012
Product Warranties Disclosures [Abstract]  
Warranty Reserves
WARRANTY RESERVES
The following is a summary of warranty reserve activity (in thousands):
 
Year Ended December 31,
 
2012
 
2011
 
2010
Balance, beginning of period
$
11,683

 
$
8,648

 
$
7,477

Reductions for warranty costs incurred
(11,958
)
 
(8,991
)
 
(7,958
)
Warranties issued
12,302

 
12,229

 
9,137

Translation and changes in estimates
22

 
(203
)
 
(8
)
Balance, end of period
$
12,049

 
$
11,683

 
$
8,648