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Consolidated Statements of Changes in Shareholders Equity (Parenthetical) (USD $)
6 Months Ended
Jun. 30, 2011
Jun. 30, 2010
Consolidated Statements of Changes in Shareholders' Equity    
Change in net unrealized holding losses on available-for-sale securities, net of reclassification adjustment, tax $ 770,749 $ 949,395
Non-credit related impairment losses on investment securities not expected to be sold, tax $ 18,061 $ 237,322