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COMMITMENTS AND CONTINGENCIES (Tables)
 9 Months Ended
Sep. 30, 2012
Commitments and Contingencies Disclosure [Abstract]  
Summary of Product Warranty Accrual
The following table summarizes changes in our product warranty accrual for the three and nine months ended September 30, 2012 and October 2, 2011 (in thousands):
 
Three Months Ended
 
Nine Months Ended
 
September 30,
2012
 
October 2,
2011
 
September 30,
2012
 
October 2,
2011
 
 
 
 
 
 
Beginning balance
$
2,915

 
$
4,085

 
$
3,419

 
$
2,539

Warranties issued in the period
293

 
753

 
1,899

 
2,830

Costs to service warranties
(961
)
 
(881
)
 
(3,396
)
 
(2,491
)
Warranty accrual adjustments
(264
)
 
(251
)
 
61

 
828

Ending balance
$
1,983

 
$
3,706

 
$
1,983

 
$
3,706