XML 92 R92.htm IDEA: XBRL DOCUMENT v3.20.1
Retirement Plans And Other Postretirement Benefits (Narrative) (Details)
$ in Thousands
 12 Months Ended
Dec. 31, 2019
USD ($)
employee
Dec. 31, 2018
USD ($)
Dec. 31, 2017
USD ($)
Defined Benefit Plan Disclosure [Line Items]      
Pension and other postretirement liabilities $ 107,446 $ 88,124  
Percentage of change in health care cost trend rate assumptions would be immaterial 1.00%    
Expected pension expense for next twelve months $ 14,200    
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 219 days    
Pension and Other Postretirement Benefits Cost (Reversal of Cost) $ 9,642 10,406 $ 10,193
Unfunded Non-Qualified Supplemental Pension Plan      
Defined Benefit Plan Disclosure [Line Items]      
Projected benefit obligation to unfunded plan 2,200 2,000  
Pension and Other Postretirement Benefits Cost (Reversal of Cost) $ 100 100 100
Films Manufacturing Facility In Kerkrade | Multiemployer Plan, Individually Insignificant Multiemployer Plans [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Number of employees participating in pension plan | employee 70    
Multi-employer pension plan, pension expenses $ 300 400 400
Pension Plan      
Defined Benefit Plan Disclosure [Line Items]      
Prior service cost (benefit) 0    
Projected benefit obligation to unfunded plan 318,763 287,240 318,123
Multi-employer pension plan, pension expenses 9,585 $ 10,342 $ 10,134
Credit Spread Over London Interbank Offered Rate Basis Points $ 12,300