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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
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Jun. 30, 2025 | Jun. 30, 2024 | Jun. 30, 2025 | Jun. 30, 2024
Retirement Plans [Abstract] |  |  |  |
Net (losses)/gains for retirement and profit-sharing plans, excess benefit plans and other similar plans | $ 5,731 | $ 6,817 | $ 11,090 | $ 20,238

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