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Financial Instruments (Carrying Value, Fair Value And Hierarchy Of Financial Instruments) (Details) - USD ($) $ in Thousands | Dec. 31, 2023 | Dec. 31, 2022
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Carrying Value [Member] |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Investments of deferred compensation plans held in trust | $ 106,126 | $ 93,196
Cash equivalents | 257,343 | 101
Long-term debt and current portion of long-term debt |  | 97,500
Quoted Prices In Active Markets For Identical Assets (Level 1) [Member] |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Investments of deferred compensation plans held in trust | 106,126 | 93,196
Cash equivalents | $ 257,343 | 101
Significant Other Observable Inputs (Level 2) [Member] |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Long-term debt and current portion of long-term debt |  | $ 97,500

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