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Goodwill and Intangible Assets, Net - Future Amortization Expense (Details) (USD $)
In Thousands, unless otherwise specified
Sep. 30, 2013
Dec. 31, 2012
Schedule of Estimated Future Amortization expense    
2013 (remaining 3 months) $ 1,021  
2014 4,053  
2015 3,890  
2016 3,858  
2017 3,830  
Thereafter 10,980  
Intangible assets, net $ 27,632 $ 29,835