Acquisition (Details Textual) (USD $)	9 Months Ended		9 Months Ended
	Sep. 30, 2012	Dec. 31, 2011	Sep. 30, 2012 Heartland [Member]	Jul. 17, 2012 Heartland [Member]
Acquisition (Textual) [Abstract]
Date of Acquisition Agreement	Jul. 17, 2012
Exchange Ratio Per Share To Heartland shareholder				$ 0.54
Market closing price per share				$ 25.25
Transaction value is estimated				$ 26,900,000
Costs related to the acquisition			1,500,000
Common stock outstanding	8,617,735	7,421,544		1,442,449
Common stock issued			778,922
Net tangible assets acquired				26,900,000
Net intangible assets acquired	2,332,000			2,300,000
Purchase price of the business assets	2,647,000			10,800,000
Acquisition of goodwill	13,838,000			13,800,000
Core deposit intangible amortization period			7 years
Loan portfolio acquired				131,100,000
Discount on loan portfolio acquired				16,500,000
Performing portion of the loan portfolio acquired				95,400,000
Estimated fair value of performing portion of the loan portfolio				$ 91,600,000