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Summary Of Significant Accounting Policies (Schedule Of Stock Options Granted And Related Estimated Fair Value At Date Of Grant) (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Stock options granted (number of shares):
Stock options granted (number of shares)	758,287	451,083	209,551
Estimated weighted average fair value of options per share at date of grant:
Total estimated fair value of stock options granted	$ 4,117	$ 2,648	$ 983
Officers
Stock options granted (number of shares):
Stock options granted (number of shares)	729,810	425,228	151,992
Estimated weighted average fair value of options per share at date of grant:
Estimated weighted average fair value of options per share at date of grant	$ 5.43	$ 5.87	$ 4.69
Management
Stock options granted (number of shares):
Stock options granted (number of shares)	28,477	25,855	57,559
Estimated weighted average fair value of options per share at date of grant:
Estimated weighted average fair value of options per share at date of grant	$ 5.43	$ 5.87	$ 4.69

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Share based compensation arrangement by share based payment award estimated fair value of stock options granted

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

+ 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
-Subparagraph (c)(1)(iv)(1)
-URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901

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The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology.

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (d)(1)
-URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901

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