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Goodwill and Intangible Assets - Estimated Amortization of Intangible Assets (Details) - USD ($)
$ in Thousands
Jun. 30, 2017
Dec. 31, 2016
Goodwill and Intangible Assets Disclosure [Abstract]    
2018 $ 13,113  
2019 12,050  
2020 7,775  
2021 3,288  
2022 and thereafter 9,847  
Total $ 46,073 $ 52,870