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Investment Securities (Details Textual) (USD $)
3 Months Ended 9 Months Ended
Sep. 30, 2012
Sep. 30, 2011
Sep. 30, 2012
Sep. 30, 2011
Dec. 31, 2011
Investment Securities (Textual) [Abstract]          
Restricted investments $ 4,285,000   $ 4,285,000   $ 4,385,000
Debt securities with carrying values 167,592,000   167,592,000   172,447,000
Securities available for sale 390   390   365
Unrealized loss 0   0   0
Other comprehensive income 315,000 1,003,000 369,000 2,642,000  
Sales of securities 26,000 0 32,192,000 26,129,000  
Investment securities gains and losses $ 0 $ 0 $ 0 $ 0