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Intangible Asset and Goodwill (Details 4) - USD ($)
$ in Thousands
Jun. 30, 2015
Dec. 31, 2014
Estimated future amortization expense of intangible assets    
2015 (remaining 6 months) $ 12,428  
2016 24,311  
2017 23,709  
2018 10,827  
2019 1,789  
Thereafter 3,630  
Net Carrying Amount $ 76,694 $ 89,371