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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, 2024
Jun. 30, 2023
Jun. 30, 2024
Jun. 30, 2023
Retirement Plans [Abstract]        
Net (losses)/gains for retirement and profit-sharing plans, excess benefit plans and other similar plans $ 6,817 $ 5,550 $ 20,238 $ 11,424