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Loans and Allowance for Loan Losses (Details 3) (USD $)
 3 Months Ended 12 Months Ended
Mar. 31, 2013
Dec. 31, 2012
Beginning balance $ (6,141,281) $ (7,400,000)
Charged-off loans (1,004,000) (2,869,000)
Recovery of charge-offs 232,000 1,180,000
Provision for loan losses 300,000 430,000
Ending balance (5,669,215) (6,141,281)
Commercial Real Estate Mortgage [Member]
    
Beginning balance 2,549,000 3,557,000
Charged-off loans (227,000) (958,000)
Recovery of charge-offs 51,000 838,000
Provision for loan losses 571,000 (888,000)
Ending balance (2,944,000) 2,549,000
Consumer Real Estate Mortgage [Member]
    
Beginning balance 1,528,000 2,518,000
Charged-off loans (299,000) (1,022,000)
Recovery of charge-offs 157,000 36,000
Provision for loan losses 96,000 (4,000)
Ending balance 1,482,000 1,528,000
Construction and Land Development [Member]
    
Beginning balance 1,241,000 827,000
Charged-off loans (155,000) (782,000)
Recovery of charge-offs 9,000 145,000
Provision for loan losses (413,000) 1,051,000
Ending balance 682,000 1,241,000
Commercial and Industrial Loans [Member]
    
Beginning balance 809,000 482,000
Charged-off loans (310,000) (74,000)
Recovery of charge-offs 14,000 144,000
Provision for loan losses 38,000 257,000
Ending balance 551,000 809,000
Consumer and Other Loans [Member]
    
Beginning balance 14,000 16,000
Charged-off loans (13,000) (33,000)
Recovery of charge-offs 1,000 17,000
Provision for loan losses 8,000 14,000
Ending balance $ 10,000 $ 14,000