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Goodwill And Other Intangible Assets (Schedule of Expected Amortization Expense) (Details)
$ in Thousands
Dec. 31, 2017
USD ($)
Goodwill and Intangible Assets Disclosure [Abstract]  
2017 $ 3,985
2018 3,585
2019 3,585
2020 3,585
2021 $ 3,460