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Goodwill and Intangible Assets - Estimated Amortization of Intangible Assets (Details) - USD ($)
$ in Thousands
Sep. 30, 2015
Dec. 31, 2014
Goodwill And Intangible Assets Disclosure [Abstract]    
2015, remaining three months $ 756  
2016 2,889  
2017 2,576  
2018 2,299  
2019 1,213  
2020 and beyond 106  
Total estimated amortization expense $ 9,839 $ 11,818