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Derivatives (Details) (USD $)
 12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Minimum
    
Derivatives    
Time period between issuance of loan commitment and closing and sale of loan 10 days  
Maximum
    
Derivatives    
Time period between issuance of loan commitment and closing and sale of loan 60 days  
Interest Rate Lock Commitments
    
Derivatives    
Derivative Asset, Notional Amount $ 46,700,000 $ 51,600,000
Interest Rate Lock Commitments | Other Assets
    
Derivatives    
Derivative Asset, Fair Value, Gross Asset (872,844) 57,363
Interest Rate Lock Commitments | Mortgage Banking Activities
    
Derivatives    
Gain on derivative 204,856  
Interest Rate Lock Commitments | Other Income
    
Derivatives    
Gain on derivative   25,008
Forward Sales Commitments
    
Derivatives    
Derivative Asset, Notional Amount 71,500,000 67,400,000
Forward Sales Commitments | Other Assets
    
Derivatives    
Derivative Asset, Fair Value, Gross Asset   129,818
Forward Sales Commitments | Other Liabilities
    
Derivatives    
Derivative Liability, Fair Value, Gross Liability 480,806  
Forward Sales Commitments | Mortgage Banking Activities
    
Derivatives    
Gain on derivative 169,759  
Forward Sales Commitments | Other Income
    
Derivatives    
Loss on derivative   (54,497)
Interest Rate Swap Agreements | Not Designated as Hedging Instrument
    
Derivatives    
Number of derivative agreements 2  
Derivative, Term of Variable Rate Basis 1 month  
Derivative Asset, Notional Amount 2,000,000 2,000,000
Derivative Liability, Notional Amount 2,000,000 2,000,000
Interest Rate Swap Agreements | Not Designated as Hedging Instrument | Other Assets
    
Derivatives    
Derivative Asset, Fair Value, Gross Asset 196,006 216,979
Interest Rate Swap Agreements | Not Designated as Hedging Instrument | Other Liabilities
    
Derivatives    
Derivative Liability, Fair Value, Gross Liability 196,006 216,979
Interest Rate Swap Asset [Member] | Non-interest Income [Member] | Not Designated as Hedging Instrument
    
Derivatives    
Gain on derivative 20,973 57,802
Interest Rate Swap Liability [Member] | Non-interest Income [Member] | Not Designated as Hedging Instrument
    
Derivatives    
Loss on derivative $ (20,973) $ (57,802,000)