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Goodwill And Other Intangible Assets (Narrative) (Details)
$ in Millions
 3 Months Ended
Mar. 31, 2017
USD ($)
Goodwill and Intangible Assets Disclosure [Abstract]  
Amortization expense of intangible assets $ 3.5
Finite-Lived Intangible Assets, Amortization Expense, Next Rolling Twelve Months 10.1
Finite-Lived Intangible Assets, Amortization Expense, Year Two 12.9
Finite-Lived Intangible Assets, Amortization Expense, Year Three 12.2
Finite-Lived Intangible Assets, Amortization Expense, Year Four 11.4
Finite-Lived Intangible Assets, Amortization Expense, Year Five $ 10.7