Employee Benefits (Summary Of Activity In Stock Option Plans) (Details) (USD $)	12 Months Ended
Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Employee Benefits [Abstract]
Outstanding Options, Beginning Balance	317,180	317,180	309,180
Outstanding Options, Granted			8,000
Outstanding Options, Exercised
Outstanding Options, Forfeited	(44,680)
Outstanding Options, Expired	(22,800)
Outstanding Options, Ending Balance	249,700	317,180	317,180
Outstanding, Weighted-Average Exercise Price, Beginning Balance	$ 18.17	$ 18.17	$ 18.54
Outstanding, Weighted-Average Exercise Price, Granted			$ 3.92
Outstanding, Weighted-Average Exercise Price, Exercised
Outstanding, Weighted-Average Exercise Price, Forfeited
Outstanding, Weighted-Average Exercise Price, Expired
Outstanding, Weighted-Average Exercise Price, Ending Balance	$ 18.98	$ 18.17	$ 18.17
Exercisable Options, Ending Balance	245,500	311,280	309,580
Exercisable Options, Weighted-Average Exercise Price, Ending Balance	$ 19.24	$ 18.44	$ 18.51

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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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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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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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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 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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