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COMMITMENTS AND CONTINGENCIES (Tables)
 12 Months Ended
Dec. 31, 2012
Commitments and Contingencies Disclosure [Abstract]  
Summary of Product Warranty Accrual
The following table summarizes changes in our product warranty accrual for the years ended December 31, 2012, 2011 and 2010 (in thousands):
 
Years Ended December 31,
 
2012
 
2011
 
2010
Beginning balance
$
3,419

 
$
2,539

 
$
1,310

Warranties issued in the period
2,242

 
3,577

 
3,599

Costs to service warranties
(4,286
)
 
(3,263
)
 
(2,204
)
Warranty accrual adjustments
316

 
566

 
(166
)
Ending balance
$
1,691

 
$
3,419

 
$
2,539
Schedule of Future Minimum Rental Payments for Operating Leases [Table Text Block]
We hold various operating leases related to our worldwide facilities and equipment. Our minimum annual lease commitments with respect to our operating leases were as follows as of December 31, 2012 (in thousands):
Year Ending December 31,
 
Minimum Future Lease Payments
 
Sublease Rental Income
 
Minimum Future Lease Payments
2013
 
$
4,887

 
$
(345
)
 
$
4,542

2014
 
3,698

 
—

 
3,698

2015
 
3,313

 
—

 
3,313

2016
 
1,884

 
—

 
1,884

2017
 
791

 
—

 
791

Thereafter
 
1,500

 
—

 
1,500

 
 
$
16,073

 
$
(345
)
 
$
15,728