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Goodwill and Other Intangible Assets (Estimated Annual Amortization Expense) (Details) - USD ($)
$ in Thousands
Dec. 31, 2016
Dec. 31, 2015
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]    
2017 $ 6,006  
2018 5,663  
2019 4,857  
2020 3,891  
2021 3,496  
2022 and thereafter 4,599  
Net Carrying Amount $ 28,512 $ 31,526