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Stock Option Plan (Details 1) (USD $)	6 Months Ended
Stock Option Plan (Details 1) (USD $)	Jun. 30, 2012	Dec. 31, 2011	Dec. 31, 2010
Stock Option Plan Details 1
Number outstanding	61,408	63,408	83,816
Exercise price on all remaining options outstanding	$ 13.95	$ 13.95	$ 13.95
Weighted-average remaining contractual life	1 year 3 months

- 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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