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Goodwill and Intangible Assets - Schedule of Expected Amortization of Intangible Assets (Details) - USD ($)
$ in Thousands
Mar. 31, 2018
Dec. 31, 2017
Goodwill And Intangible Assets Disclosure [Abstract]    
2018 (for the remaining nine months) $ 2,493  
2019 2,611  
2020 1,366  
2021 1,295  
2022 and thereafter 187  
Net carrying amount $ 7,952 $ 8,634