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Commitments and Contingencies (Tables)
 9 Months Ended
Sep. 30, 2012
Commitments and Contingencies [Abstract]  
Summary of minimum rental commitments under operating and capital leases
                 
    Operating Leases     Capital Leases  
    (In thousands)  

Remainder of 2012

   $ 453     $ 84  

2013

     1,795       322  

2014

     1,762       42  

2015

     2,025       —    

2016

     2,038       —    

2017 and thereafter

     10,201       —    
   

 

 

    

 

 

  

Minimum lease payments

     18,274       448  

Less amount representing interest

     —         22  
   

 

 

    

 

 

  
    $ 18,274     $ 426