Share-Based Compensation (Schedule Of Stock Option Activity) (Details)	3 Months Ended
Mar. 31, 2021 $ / shares shares
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Options Outstanding, Outstanding, December 31, 2019 (in shares) \| shares	419,100
Options Outstanding, Exercised (in shares) \| shares	(7,250)
Options Outstanding, Outstanding, September 30, 2020 (in shares) \| shares	411,850
Options Outstanding, Exercisable, September 30, 2020 (in shares) \| shares	286,776
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, 2019 (in dollars per share) \| $ / shares	$ 15.22
Weighted-Average Exercise Price Per Share, Exercised (in dollars per share) \| $ / shares	17.16
Weighted-Average Exercise Price Per Share, Outstanding, September 30, 2020 (in dollars per share) \| $ / shares	15.19
Weighted-Average Exercise Price Per Share, Exercisable, September 30, 2020 (in dollars per share) \| $ / shares	$ 12.91

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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- Definition

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.

+ References

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- Definition

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

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901

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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.

+ References

No definition available.

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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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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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No definition available.

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- Definition

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

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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