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Goodwill and Other Intangible Assets (Schedule Of Intangible Assets and Goodwill) (Details) - USD ($)
$ in Thousands
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Goodwill and Intangible Assets Disclosure [Abstract]        
2018 $ 6,166      
2019 5,618      
2020 4,986      
2021 4,520      
2022 4,095      
Thereafter 4,745      
Total Expected Amortization $ 30,130 $ 36,886 $ 45,508 $ 56,733