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Earnings Per Share (Details) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Schedule of basic and diluted earning per share
Net income, basic	$ 7,423,000	$ 3,203,000	$ 8,746,000	$ 821,000
Weighted Average Number of Shares Outstanding, basic	2,637,825	2,755,035	2,664,934	2,767,124
Net income per share, Basic	$ 2.81	$ 1.16	$ 3.28	$ 0.30
Effect of dilutive securities, options	734,079	736,739	733,265	734,671
Net income, diluted	$ 7,423,000	$ 3,203,000	$ 8,746,000	$ 821,000
Weighted Average Number of Shares Outstanding, diluted	3,371,904	3,491,774	3,398,199	3,501,795
Net income per share, diluted	$ 2.20	$ 0.92	$ 2.57	$ 0.23

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