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Securities (Details Textual) (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Securities (Textual) [Abstract]
Unrealized loss, other than temporary securities	$ 0
Tax effect of the proceeds from sale of securities	1	622	187
Pledged of Fair Value of Securities as collateral	171,600,000
Securities Pledged for Federal Home Loan Bank At Fair Value	90,900,000
Securities Pledged For Derivative At Fair Value	8,600,000
Amortization cost of Securities as collateral not Separately Reported	165,700,000
Securities for Federal Home Loan Bank Not Separately Reported	84,500,000
Assets Securities Pledged for Derivative Value	12,900,000
Debt Instrument Repurchase Agreement	138,400,000
Debt Instrument Federal Home Loan Bank	0
Debt Instrument Derivative Swap Agreement	$ 13,500,000

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Total of accumulated other comprehensive loss related to that portion of other than temporary impairment (OTTI) due to factors other than credit losses on debt securities categorized either as available-for-sale or held-to-maturity that an entity does not intend to sell and which it is not more likely than not that the entity will be required to sell before recovery of the amortized cost basis of the debt security. The amount represented by this item is net of tax, as applicable.

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