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Earnings Per Share Computations (Narrative) (Details) (USD $)	Dec. 31, 2012	Dec. 31, 2011
Earnings Per Share Computations [Abstract]
Number of common stock shares to purchase under stock options	119,500	104,500
Average price of common shares under stock options	$ 14.36	$ 14.80

- Definition

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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