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Goodwill and Other Intangibles - Schedule of Future Amortization Expense (Details) - USD ($)
$ in Thousands
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Year Ending December 31,        
2018 $ 4,227      
2019 3,698      
2020 3,113      
2021 2,594      
2022 2,184      
2023 and beyond 5,675      
Net Book Value $ 21,491 $ 26,029 $ 31,745 $ 21,192