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Goodwill and Intangible Assets - Schedule of Aggregate Amortization Expense (Details) - USD ($)
$ in Thousands
Dec. 31, 2017
Dec. 31, 2016
Finite-Lived Intangible Assets, Amortization Expense, Maturity Schedule [Abstract]    
2018 $ 1,377  
2019 1,251  
2020 731  
2021 731  
2022 506  
2023 and thereafter 538  
Net Intangibles $ 5,134 $ 135