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Goodwill And Other Intangible Assets (Estimated Annual Amortization Expense) (Details)
$ in Thousands
Dec. 31, 2016
USD ($)
Goodwill and Intangible Assets Disclosure [Abstract]  
2018 $ 4,004
2019 4,004
2020 3,969
2021 3,884
2022 $ 3,811