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Retirement Plans And Other Postretirement Benefits (Reconciliation Of Changes In Benefit Obligations And Plan Assets) (Details) - USD ($)
$ in Thousands
 12 Months Ended
Oct. 31, 2023
Feb. 09, 2022
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Pension Benefits          
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]          
Benefit obligation, beginning of year     $ 248,114 $ 316,169  
Service cost     0 0 $ 0
Interest cost     9,623 8,945 8,398
Effect of actuarial (gains) losses related to the following:          
Discount rate change     (10,751) (61,519)  
Other     (6,459) 1,513  
Plan participant contributions     0 0  
Benefits paid     16,957 16,994  
Settlement payments and annuity purchase     (221,970) 0  
Benefit obligation, end of year     1,600 248,114 316,169
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]          
Plan assets at fair value, beginning of year     218,119 244,612  
Actual return on plan assets     (7,053) (59,683)  
Employer contributions $ 27,700 $ 50,000 27,861 50,184  
Plan participant contributions     0 0  
Benefits paid     16,957 16,994  
Settlement payments and annuity purchase     (221,970) 0  
Plan assets at fair value, end of year     0 218,119 244,612
Funded status of the plans     (1,600) (29,995)  
Amounts recognized in the consolidated balance sheets:          
Net amount recognized     1,600 29,995  
Other Post-Retirement Benefits          
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]          
Benefit obligation, beginning of year     5,726 7,370  
Service cost     10 18 21
Interest cost     288 207 195
Effect of actuarial (gains) losses related to the following:          
Discount rate change     99 (1,483)  
Other     12 90  
Plan participant contributions     490 554  
Benefits paid     913 1,030  
Settlement payments and annuity purchase     0 0  
Benefit obligation, end of year     5,712 5,726 7,370
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]          
Plan assets at fair value, beginning of year     0 0  
Actual return on plan assets     0 0  
Employer contributions     423 476  
Plan participant contributions     490 554  
Benefits paid     913 1,030  
Settlement payments and annuity purchase     0 0  
Plan assets at fair value, end of year     0 0 $ 0
Funded status of the plans     (5,712) (5,726)  
Amounts recognized in the consolidated balance sheets:          
Net amount recognized     5,712 5,726  
Accrued Expenses | Pension Benefits          
Amounts recognized in the consolidated balance sheets:          
Accrued expenses (current)     180 180  
Accrued Expenses | Other Post-Retirement Benefits          
Amounts recognized in the consolidated balance sheets:          
Accrued expenses (current)     489 489  
Other Noncurrent Liabilities [Member] | Pension Benefits          
Amounts recognized in the consolidated balance sheets:          
Pension and other postretirement benefit obligations, net     1,420 29,815  
Other Noncurrent Liabilities [Member] | Other Post-Retirement Benefits          
Amounts recognized in the consolidated balance sheets:          
Pension and other postretirement benefit obligations, net     $ 5,223 $ 5,237