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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
 3 Months Ended 12 Months Ended
Sep. 30, 2024
Dec. 31, 2023
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Components of net periodic benefit cost:          
Pension settlement loss $ 25,600 $ 66,700 $ 0 $ 92,291 $ 0
Pension Benefits          
Weighted-average assumptions used to determine benefit obligations:          
Discount rate   4.89% 5.49% 4.89% 5.07%
Expected long-term return on plan assets         4.99%
Weighted-average assumptions used to determine net periodic benefit cost:          
Discount rate(a)         2.90%
Expected long-term return on plan assets         3.05%
Components of net periodic benefit cost:          
Service cost     $ 0 $ 0 $ 0
Interest cost     75 9,623 8,945
Expected return on plan assets     0 (8,109) (8,174)
Amortization of prior service costs and gains or losses     21 9,245 13,746
Net periodic benefit cost     96 10,759 14,517
Pension settlement loss     0 92,291 0
Total benefit cost     $ 96 $ 103,050 $ 14,517
Pension Benefits | Minimum          
Weighted-average assumptions used to determine net periodic benefit cost:          
Discount rate(a)       5.07%  
Pension Benefits | Maximum          
Weighted-average assumptions used to determine net periodic benefit cost:          
Discount rate(a)     4.89% 5.37%  
Other Post-Retirement Benefits          
Weighted-average assumptions used to determine benefit obligations:          
Discount rate   4.98% 5.63% 4.98% 5.17%
Weighted-average assumptions used to determine net periodic benefit cost:          
Discount rate(a)     4.98% 5.17% 2.86%
Components of net periodic benefit cost:          
Service cost     $ 9 $ 10 $ 18
Interest cost     274 288 207
Expected return on plan assets     0 0 0
Amortization of prior service costs and gains or losses     (162) (213) (140)
Net periodic benefit cost     121 85 85
Pension settlement loss     0 0 0
Total benefit cost     $ 121 $ 85 $ 85