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Retirement Plans And Other Postretirement Benefits (Components Of Net Periodic Benefit Income Or Cost For Continuing Operations) (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Pension Benefits      
Weighted-average assumptions used to determine benefit obligations:      
Discount rate 2.90% 2.57% 3.27%
Defined Benefit Plan Assumption Expected Long Term Return On Assets At Year End 3.05% 5.00% 5.00%
Weighted-average assumptions used to determine net periodic benefit cost:      
Discount rate 2.57% 3.27% 4.40%
Expected long-term return on plan assets 5.00% 5.00% 6.00%
Components of net periodic benefit cost:      
Service cost $ 0 $ 0 $ 0
Interest cost 8,398 10,156 12,222
Expected return on plan assets (11,316) (11,004) (13,528)
Amortization of prior service costs and gains or losses 17,003 15,494 10,891
Net periodic benefit cost $ 14,085 $ 14,646 $ 9,585
Other Post-Retirement Benefits      
Weighted-average assumptions used to determine benefit obligations:      
Discount rate 2.86% 2.54% 3.25%
Weighted-average assumptions used to determine net periodic benefit cost:      
Discount rate 2.54% 3.25% 4.37%
Components of net periodic benefit cost:      
Service cost $ 21 $ 29 $ 26
Interest cost 195 243 290
Expected return on plan assets 0 0 0
Amortization of prior service costs and gains or losses (141) (198) (258)
Net periodic benefit cost $ 75 $ 74 $ 58