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COMMITMENTS AND CONTINGENCIES (Tables)
 6 Months Ended
Jun. 30, 2013
Commitments and Contingencies Disclosure [Abstract]  
Summary of Product Warranty Accrual
The following table summarizes changes in our product warranty accrual for the three and six months ended June 30, 2013 and July 1, 2012 (in thousands):
 
Three Months Ended
 
Six Months Ended
 
June 30, 2013
 
July 1, 2012
 
June 30, 2013
 
July 1, 2012
Beginning balance
$
1,542

 
$
2,693

 
$
1,691

 
$
3,419

Warranties issued in the period
467

 
664

 
874

 
1,606

Costs to service warranties
(539
)
 
(1,222
)
 
(1,107
)
 
(2,435
)
Warranty accrual adjustments
(21
)
 
780

 
(9
)
 
325

Ending balance
$
1,449

 
$
2,915

 
$
1,449

 
$
2,915