Commitments and Contingencies (Tables)
 6 Months Ended
Jun. 30, 2012
Commitments and Contingencies [Abstract]  
Schedule of contract commitments
         

Year ending December 31:

      

2012 (remaining six months)

   $ 2,761  

2013

     4,773  

2014

     1,419  

2015

     1,080  

2016

     1,080  

Due after 5 years

     360  
   

 

 

  

Total contract commitments

   $ 11,473