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Commitments and Contingencies (Tables)
3 Months Ended
Mar. 31, 2012
Commitments and Contingencies [Abstract]  
Operating Lease Obligations
The Company leases certain of its manufacturing facilities under noncancelable operating leases expiring at various dates through June 2014. The Company incurred rental expense under these leases of $1.0 million for the three months ended March 31, 2012 and $0.9 million for the three months ended March 31, 2011. The approximate minimum rental commitments required under existing noncancelable leases as of March 31, 2012 are as follows (in thousands):
              
2012
 $2,668 
2013
  2,340 
2014
  778 
2015
  173 
2016
  - 
Thereafter
  - 
   $5,959