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Goodwill and Intangible Assets - Schedule of Expected Amortization of Intangible Assets (Details) - USD ($)
$ in Thousands
Jun. 30, 2018
Dec. 31, 2017
Goodwill And Intangible Assets Disclosure [Abstract]    
2018 (for the remaining six months) $ 3,760  
2019 6,413  
2020 5,028  
2021 4,541  
2022 and thereafter 4,100  
Net carrying amount $ 23,842 $ 8,634