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Goodwill and Other Intangible Assets (Schedule Of Estimated Amortization Expense) (Details)
$ in Thousands
Mar. 31, 2017
USD ($)
Goodwill and Intangible Assets Disclosure [Abstract]  
2017 $ 35,617
2018 35,641
2019 35,629
2020 35,624
2021 $ 35,301