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Goodwill and Intangible Assets - Future Amortization Expense for Intangible Assets (Details) - USD ($)
$ in Thousands
Sep. 30, 2017
Dec. 31, 2016
Goodwill And Intangible Assets Disclosure [Abstract]    
Remainder of 2017 $ 1,754  
2018 7,007  
2019 6,982  
2020 6,880  
2021 6,880  
Thereafter 14,333  
Total finite-lived intangibles, Net carrying amount $ 43,836 $ 49,203