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The number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the option plan.

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The weighted-average price as of the balance sheet date at which grantees can acquire the shares reserved for issuance on vested portions of options outstanding and currently exercisable under the stock option plan.

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- Definition

Number of options or other stock instruments for which the right to exercise has lapsed under the terms of the plan agreements.

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- Definition

The number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan.

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- Definition

Gross number of share options (or share units) granted during the period.

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- Definition

Number of options outstanding, including both vested and non-vested options.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 718
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-Name Accounting Standards Codification
-Section 50
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- Definition

A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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No definition available.

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No definition available.

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- Definition

Weighted average price at which option holders acquired shares when converting their stock options into shares.

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- Definition

Weighted average price at which grantees could have acquired the underlying shares with respect to stock options of the plan that expired.

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- Definition

Weighted average price at which grantees could have acquired the underlying shares with respect to stock options that were terminated.

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Weighted average per share amount at which grantees can acquire shares of common stock by exercise of options.

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- Definition

Weighted average remaining contractual term for vested portions of options outstanding and currently exercisable or convertible, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Weighted average remaining contractual term for option awards outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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The weighted average price as of the balance sheet date at which grantees could acquire the underlying shares with respect to all outstanding stock options which are in the customized range of exercise prices.

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Number of share options (or share units) exercised during the current period.

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Share-Based Compensation (Schedule Of Stock Option Activity) (Details) - $ / shares	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Number of Shares
Options outstanding, beginning (in shares)	2,447,171	2,216,175	1,652,505
Options exercised (in shares)	(1,065,119)
Options expired (in shares)	(301,837)
Options outstanding, December 31 (in shares)	1,416,215	2,447,171	2,216,175
Weighted Average Grant Date Fair Value
Outstanding, January 1 (in usd per share)	$ 68.80	$ 70.97	$ 78.10
Exercised (in usd per share)	58.24
Options expired (in US dollars per share)	79.96
Outstanding, December 31 (in usd per share)	$ 71.06	$ 68.80	$ 70.97
Weighted Average Remaining Contractual Life (Years)
Share-based compensation arrangement by share-based Payment award, options, outstanding, weighted average remaining contractual term	1 year 9 months 10 days
Share-based compensation arrangement by share-based payment award, options, exercisable, weighted average remaining contractual term	1 year 1 month 13 days
Share-based compensation arrangement by share-based payment award, options, exercisable, number	1,075,521
Share-based compensation arrangement by share-based payment award, options, exercisable, weighted average exercise price	$ 75.56
2019 Stock Option Plan
Number of Shares
Options granted (in shares)	431,000	385,500	718,000
Options exercised (in shares)		(5,166)	(56,832)
Options forfeited (in shares)	(95,000)	(61,168)	(23,000)
Options expired (in shares)		(88,170)	(74,498)
Weighted Average Grant Date Fair Value
Granted (in usd per share)	$ 57.76	$ 54.73	$ 53.62
Exercised (in usd per share)		53.41	53.41
Forfeited (in usd per share)	$ 68.00	66.44	62.33
Options expired (in US dollars per share)		$ 64.33	$ 77.93
Grant Date 2-21-2020
Number of Shares
Options outstanding, December 31 (in shares)	491,000
Weighted Average Grant Date Fair Value
Outstanding, December 31 (in usd per share)	$ 90.79
Weighted Average Remaining Contractual Life (Years)
Share-based compensation arrangement by share-based Payment award, options, outstanding, weighted average remaining contractual term	1 month 20 days
Grant date 2-25-2021
Number of Shares
Options outstanding, December 31 (in shares)	322,500
Weighted Average Grant Date Fair Value
Outstanding, December 31 (in usd per share)	$ 69.20
Weighted Average Remaining Contractual Life (Years)
Share-based compensation arrangement by share-based Payment award, options, outstanding, weighted average remaining contractual term	1 year 1 month 24 days
Grant date 2-25-2022
Number of Shares
Options outstanding, December 31 (in shares)	126,560
Weighted Average Grant Date Fair Value
Outstanding, December 31 (in usd per share)	$ 53.41
Weighted Average Remaining Contractual Life (Years)
Share-based compensation arrangement by share-based Payment award, options, outstanding, weighted average remaining contractual term	2 years 1 month 24 days
Grant date2-24-2023
Number of Shares
Options outstanding, December 31 (in shares)	171,650
Weighted Average Grant Date Fair Value
Outstanding, December 31 (in usd per share)	$ 54.73
Weighted Average Remaining Contractual Life (Years)
Share-based compensation arrangement by share-based Payment award, options, outstanding, weighted average remaining contractual term	3 years 1 month 24 days
Grant date2-23-2024
Number of Shares
Options outstanding, December 31 (in shares)	304,505
Weighted Average Grant Date Fair Value
Outstanding, December 31 (in usd per share)	$ 57.76
Weighted Average Remaining Contractual Life (Years)
Share-based compensation arrangement by share-based Payment award, options, outstanding, weighted average remaining contractual term	4 years 1 month 24 days