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COMMITMENTS AND CONTINGENCIES (Tables)
 9 Months Ended
Sep. 29, 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 nine months ended September 29, 2013 and September 30, 2012 (in thousands):
 
Three Months Ended
 
Nine Months Ended
 
September 29,
2013
 
September 30,
2012
 
September 29,
2013
 
September 30,
2012
Beginning balance
$
1,449

 
$
2,915

 
$
1,691

 
$
3,419

Warranties issued in the period
593

 
293

 
1,467

 
1,899

Costs to service warranties
(349
)
 
(961
)
 
(1,456
)
 
(3,396
)
Warranty accrual adjustments
(158
)
 
(264
)
 
(167
)
 
61

Ending balance
$
1,535

 
$
1,983

 
$
1,535

 
$
1,983