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Goodwill And Other Intangibles (Schedule Of Estimated Amortization Of Intangibles) (Details)
$ in Thousands
Dec. 31, 2016
USD ($)
Goodwill and Intangible Assets Disclosure [Abstract]  
2017 $ 764,409
2018 544,485
2019 473,230
2020 442,265
2021 $ 427,558