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Retirement Plans And Other Postretirement Benefits (Narrative) (Details)
$ in Millions
 12 Months Ended
Dec. 31, 2016
USD ($)
employee
Dec. 31, 2015
USD ($)
Dec. 31, 2014
USD ($)
Defined Benefit Plan Disclosure [Line Items]      
Percentage of change in health care cost trend rate assumptions would be immaterial 1.00%    
Expected pension expense for next twelve months $ 10.4    
Term of estimated benefit payments for fixed income securities, minimum 1 year    
Term of estimated benefit payments for fixed income securities, maximum 2 years    
Defined benefit, average remaining duration of benefit payments for pension plans 11 years 4 months 24 days    
Pension Plan      
Defined Benefit Plan Disclosure [Line Items]      
Defined benefit plan, expect to required contributions $ 5.5    
Unfunded Non-Qualified Supplemental Pension Plan      
Defined Benefit Plan Disclosure [Line Items]      
Projected benefit obligation to unfunded plan 2.2 $ 2.3  
Pension Expense $ 0.1 0.1 $ 0.1
Films Manufacturing Facility In Kerkrade | Multiemployer Plans, Pension      
Defined Benefit Plan Disclosure [Line Items]      
Number of employees participating in pension plan | employee 78    
Multi-employer pension plan, pension expenses $ 0.4 $ 0.4 $ 0.5