Stock-Based Compensation (Summary Of Information Regarding Stock Option Plans) (Details) (USD $)	6 Months Ended
Jun. 30, 2012
Stock-Based Compensation [Abstract]
Options outstanding, beginning of year, Number of Shares,	111,034
Options expired, Number of Shares	(4,389)
Options forfeited, Number of Shares	(23,274)
Options outstanding, end of quarter, Number of Shares	83,371
Options outstanding, beginning of year, Weighted Average Exercise Price per Share,	$ 12.25
Options expired, Weighted Average Exercise Price per Share	$ 8.90
Options forfeited, Weighted Average Exercise Price per Share	$ 11.97
Options outstanding, end of quarter, Weighted Average Exercise Price per Share	$ 12.51
Options outstanding, end of quarter, Weighted Average Contractual Term	1 year 10 months 2 days
Options outstanding, end of quarter, Aggregate Intrinsic Value
Options exercisable, end of quarter, Number of Shares	83,371
Options exercisable, end of quarter, Weighted Average Exercise Price per Share	$ 12.51
Options exercisable, end of quarter, Weighted Average Contractual Term	1 year 10 months 2 days
Options exercisable, end of quarter, Aggregate Intrinsic Value

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

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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 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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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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