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Stock-Based Compensation (Schedule Of Stock Option Activity) (Details) - USD ($) $ / shares in Units, $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2018	Dec. 31, 2017
Stock-Based Compensation [Abstract]
Outstanding, Shares	143,750
Outstanding, Weighted Average Exercise Price	$ 12.44
Outstanding, Weighted Average Remaining Contractual Term	1 year 6 months	1 year 9 months 18 days
Outstanding, Aggregate Intrinsic Value	$ 635
Exercised, Shares	(15,000)
Exercised, Weighted Average Exercise price	$ 10.00
Exercised, Aggregate Intrinsic Value	$ 120
Outstanding, Shares	128,750	143,750
Outstanding, Weighted Average Exercise Price	$ 12.72	$ 12.44
Outstanding, Weighted Average Remaining Contractual Term	1 year 6 months	1 year 9 months 18 days
Outstanding, Aggregate Intrinsic Value	$ 718	$ 635
Exercisable, Shares	128,750
Exercisable, Weighted Average Exercise Price	$ 12.72
Exercisable, Weighted Average Remaining Contractual	1 year 6 months
Exercisable, Aggregate Intrinsic Value	$ 718

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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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-Publisher FASB
-Name Accounting Standards Codification
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-Section 50
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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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Amount of accumulated difference between fair value of underlying shares on dates of exercise and exercise price on options exercised (or share units converted) into shares.

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Amount by which the current fair value of the underlying stock exceeds the exercise price of options outstanding.

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

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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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Amount of difference between fair value of the underlying shares reserved for issuance and exercise price of vested portions of options outstanding and currently exercisable.

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

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