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Retirement Plans (Schedule Of Expenses For Retirement, Profit-Sharing Plans, Excess Benefit Plans And Other Similar Plans) (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2022
Jun. 30, 2021
Jun. 30, 2022
Jun. 30, 2021
Retirement Plans [Abstract]        
Net (losses)/gains for retirement and profit-sharing plans, excess benefit plans and other similar plans $ 639 $ 7,904 $ 3,556 $ 16,603