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Commitments and Contingencies (Tables)
 3 Months Ended
Mar. 31, 2012
Commitments and Contingencies [Abstract]  
Summary of minimum rental commitments under operating and capital leases
                 

Year Ending March 31,

   Operating
Leases		     Capital
Leases		  
    (In thousands)  

Remainder of 2012

   $ 1,358     $ 252  

2013

     1,794       322  

2014

     1,760       42  

2015

     2,022       —    

2016

     2,035       —    

2017 and thereafter

     10,189       —    
   

 

 

    

 

 

  

Minimum lease payments

     19,158       616  

Less amount representing interest

     —         40  
   

 

 

    

 

 

  
    $ 19,158     $ 576