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Earnings Per Share (Details) (USD $) In Thousands, except Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Schedule of basic and diluted earning per share
Net income, basic	$ 15,056	$ 4,811
Weighted Average Number of Shares Outstanding, basic	2,624,335	2,747,732
Net income per share, Basic	$ 5.74	$ 1.75
Net income, diluted	$ 15,056	$ 4,811
Weighted Average Number of Shares Outstanding, diluted	3,359,579	3,479,434
Net income per share, diluted	$ 4.48	$ 1.38
Stock Options [Member]
Schedule of basic and diluted earning per share
Effect of dilutive securities, options	735,244	731,702

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Net Income or Loss Available to Common Stockholders plus adjustments resulting from the assumption that dilutive convertible securities were converted, options or warrants were exercised, or that other shares were issued upon the satisfaction of certain conditions.

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