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Commitments and Contingencies (Tables)
 12 Months Ended
Dec. 31, 2011
Commitments and Contingencies [Abstract]  
Summary of minimum rental commitments under operating and capital leases
                 

Year Ending December 31,

   Operating
Leases		     Capital
Leases		  
    (In thousands)  

2012

   $ 1,805     $ 336  

2013

     1,790       322  

2014

     1,756       42  

2015

     2,014       —  

2016

     2,027       —  

2017 and thereafter

     10,159       —  
   

 

 

    

 

 

  

Minimum lease payments

     19,551       700  

Less amount representing interest

     —       52  
   

 

 

    

 

 

  
    $ 19,551     $ 648