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Goodwill And Other Intangible Assets (Narrative) (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2019
Jun. 30, 2018
Jun. 30, 2019
Jun. 30, 2018
Goodwill and Intangible Assets Disclosure [Abstract]        
Amortization expense of intangible assets $ 3.1 $ 3.3 $ 6.2 $ 6.6
Finite-Lived Intangible Assets, Amortization Expense, Remainder of Fiscal Year 5.9   5.9  
Finite-Lived Intangible Assets, Amortization Expense, Year Two 11.4   11.4  
Finite-Lived Intangible Assets, Amortization Expense, Year Three 10.7   10.7  
Finite-Lived Intangible Assets, Amortization Expense, Year Four 10.1   10.1  
Finite-Lived Intangible Assets, Amortization Expense, Year Five $ 9.2   $ 9.2