Financial Instruments (Carrying Value, Fair Value And Hierarchy Of Financial Instruments) (Details) - USD ($) $ in Thousands |
Jun. 30, 2025 |
Dec. 31, 2024 |
|---|---|---|
| Carrying Value [Member] | ||
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ||
| Investments of deferred compensation plans held in trust | $ 129,560 | $ 130,960 |
| Cash equivalents | 291,568 | 188,379 |
| 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 | 129,560 | 130,960 |
| Cash equivalents | $ 291,568 | $ 188,379 |