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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 $ 780,548
2018 579,733
2019 513,371
2020 482,111
2021 $ 467,639