Stock Option Plan (Summary Of Activity In Stock Option Plans) (Details) (USD $)	9 Months Ended
Sep. 30, 2012	Sep. 30, 2011
Stock Option Plan [Abstract]
Outstanding Options, Beginning Balance	317,180	317,180
Outstanding Options, Granted
Outstanding Options, Exercised
Outstanding Options, Forfeited
Outstanding Options, Expired	(22,800)
Outstanding Options, Ending Balance	294,380	317,180
Outstanding, Weighted-Average Exercise Price, Beginning Balance	$ 18.17	$ 18.17
Outstanding, Weighted-Average Exercise Price, Granted
Outstanding, Weighted-Average Exercise Price, Exercised
Outstanding, Weighted-Average Exercise Price, Forfeited
Outstanding, Weighted-Average Exercise Price, Expired	$ 5.12
Outstanding, Weighted-Average Exercise Price, Ending Balance	$ 19.18	$ 18.17

Number of options or other stock instruments for which the right to exercise has lapsed under the terms of the plan agreements.

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

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

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The number of shares reserved for issuance under stock option agreements awarded under the plan that validly exist and are outstanding as of the balance sheet date, including 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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Weighted average price at which grantees could have acquired the underlying shares with respect to stock options of the plan that expired.

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Weighted average price at which grantees can acquire the shares reserved for issuance on stock options awarded.

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

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