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Warranty Reserves (Tables)
 3 Months Ended
Apr. 01, 2012
Product Warranties Disclosures [Abstract]  
Schedule of Product Warranty Reserve Activity
The following is a summary of warranty reserve activity (in thousands):
 
Thirteen Weeks Ended
 
April 1,
2012
 
April 3,
2011
Balance, beginning of period
$
11,683

 
$
8,648

Reductions for warranty costs incurred
(2,531
)
 
(2,422
)
Warranties issued
2,621

 
3,359

Translation and changes in estimates
129

 
150

Balance, end of period
$
11,902

 
$
9,735