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Goodwill And Other Intangible Assets (Schedule Of Estimated Future Amortization Expense) (Details)
$ in Thousands
Dec. 31, 2016
USD ($)
Goodwill And Other Intangible Assets [Abstract]  
2017 $ 10,913
2018 9,923
2019 9,772
2020 9,187
2021 $ 6,389