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Stock-Based Compensation Plans (Schedule Of Comparative Data For Stocks Option, Stock Awards And PSUs) (Details) - USD ($) $ / shares in Units, $ in Thousands | 12 Months Ended
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Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Stock-Based Compensation Plans [Abstract] |  |  |
Total compensation expense of stock-based compensation plans charged against income | $ 40,793 | $ 33,613 | $ 31,420
Total income tax benefit recognized in income for stock based compensation expense charged against income | 9,709 | 8,487 | 7,918
Total intrinsic value of stock options exercised | 54,681 | 53,339 | 62,038
Total intrinsic value of stock awards vested during the period | $ 1,444 | $ 1,170 | $ 1,173
Per-share weighted average grant-date fair value of stock awards granted | $ 545.69 | $ 496.25 | $ 482.66

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- Definition Amount of expense for award under share-based payment arrangement. Excludes amount capitalized. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 14.F) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479830/718-10-S99-1 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (h)(1)(i) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480429/718-10-50-2 + Details
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- Definition The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(2)(iii)(01) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480429/718-10-50-2 + Details
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