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Share-Based Compensation (Schedule Of Stock Option Activity) (Details) - shares	6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017
Options outstanding, January 1	859,182	541,679
Options outstanding, March 31	1,310,012	934,181
Options exercisable, March 31	854,990	540,830
2012 Plan [Member]
Options granted	560,000	485,000
Options exercised	(94,170)	(70,830)
Options forfeited	(15,000)	(6,668)
2005 Plan [Member]
Options exercised	0	(15,000)

X

- Definition

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.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(1)(iii)
-URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901

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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.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(1)(iv)(4)
-URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901

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X

- Definition

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

+ References

No definition available.

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- Definition

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

+ References

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-Publisher FASB
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-URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901

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- Definition

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

+ References

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-Publisher FASB
-Name Accounting Standards Codification
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