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Commitments and Contingencies (Tables)
 3 Months Ended
Mar. 31, 2013
Commitments and Contingencies/Employee Matter [Abstract]  
Summary of minimum rental commitments under operating and capital leases
                 
    Operating Leases     Capital Leases  
    (In thousands)  

Remainder of 2013

   $ 1,387     $ 238  

2014

     1,828       42  

2015

     2,088       —     

2016

     2,019       —     

2017

     2,873       —     

2018 and thereafter

     7,255       —     
   

 

 

    

 

 

  

Minimum lease payments

     17,450       280  

Less amount representing interest

     —          9  
   

 

 

    

 

 

  
    $ 17,450     $ 271