Share-Based Compensation (Schedule Of Stock Option Activity) (Details) - $ / shares	9 Months Ended
Sep. 30, 2021
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Options Outstanding, Outstanding, December 31, 2020 (in shares)	419,100
Options Outstanding, Exercised (in shares)	(77,125)
Options Outstanding, Forfeited (in shares)	(1,775)
Options Outstanding, Outstanding, September 30, 2021 (in shares)	340,200
Options Outstanding, Exercisable, September 30, 2021 (in shares)	216,901
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Abstract]
Weighted-Average Exercise Price Per Share, Outstanding, December 31, 2020 (in dollars per share)	$ 15.22
Weighted-Average Exercise Price Per Share, Exercised (in dollars per share)	11.31
Weighted-Average Exercise Price Per Share, Forfeited (in dollars per share)	17.52
Weighted-Average Exercise Price Per Share, Outstanding, September 30, 2021 (in dollars per share)	16.10
Weighted-Average Exercise Price Per Share, Exercisable, June 30, 2021 (in dollars per share)	$ 13.61

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

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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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Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan.

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

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

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

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