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Trust Preferred Capital Notes (Details) (USD $)
 12 Months Ended 12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2012
Trust II [Member]
Dec. 31, 2011
Trust II [Member]
Sep. 20, 2007
Trust II [Member]
Dec. 31, 2012
Maximum [Member]
Trust Preferred Capital Notes [Line Items]            
Trust preferred securities issued by subsidiary trust     $ 7,000,000   $ 7,000,000  
Common equity issued by subsidiary trust         217,000  
Trust preferred capital notes $ 7,217,000 $ 7,217,000     $ 7,217,000  
Floating rate of interest     1.93% 2.15%    
Redemption date of securities September 1, 2037          
Portion of trust preferred securities in Tier 1 capital, percentage           25.00%