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Fair Value Measurements (Details) (USD $)
In Thousands, unless otherwise specified
Sep. 30, 2013
Dec. 31, 2012
Recurring Fair Value Measurements    
Available-for-sale securities $ 100,884 $ 111,518
U.S. government agencies
    
Recurring Fair Value Measurements    
Available-for-sale securities 140 155
Mortgage-backed securities of government sponsored entities
    
Recurring Fair Value Measurements    
Available-for-sale securities 77,437 85,830
Private-label collateralized mortgage obligations
    
Recurring Fair Value Measurements    
Available-for-sale securities 792 1,106
State and political subdivisions
    
Recurring Fair Value Measurements    
Available-for-sale securities 22,515 24,427
Fair Value measured on a Recurring Basis | Fair value | U.S. government agencies
    
Recurring Fair Value Measurements    
Available-for-sale securities 140 155
Fair Value measured on a Recurring Basis | Fair value | Mortgage-backed securities of government sponsored entities
    
Recurring Fair Value Measurements    
Available-for-sale securities 77,437 85,830
Fair Value measured on a Recurring Basis | Fair value | Private-label collateralized mortgage obligations
    
Recurring Fair Value Measurements    
Available-for-sale securities 792 1,106
Fair Value measured on a Recurring Basis | Fair value | State and political subdivisions
    
Recurring Fair Value Measurements    
Available-for-sale securities 22,515 24,427
Fair Value measured on a Recurring Basis | Quoted Prices in Active Markets for Identical Assets (Level 1) | U.S. government agencies
    
Recurring Fair Value Measurements    
Available-for-sale securities      
Fair Value measured on a Recurring Basis | Quoted Prices in Active Markets for Identical Assets (Level 1) | Mortgage-backed securities of government sponsored entities
    
Recurring Fair Value Measurements    
Available-for-sale securities      
Fair Value measured on a Recurring Basis | Quoted Prices in Active Markets for Identical Assets (Level 1) | Private-label collateralized mortgage obligations
    
Recurring Fair Value Measurements    
Available-for-sale securities      
Fair Value measured on a Recurring Basis | Quoted Prices in Active Markets for Identical Assets (Level 1) | State and political subdivisions
    
Recurring Fair Value Measurements    
Available-for-sale securities      
Fair Value measured on a Recurring Basis | Significant Other Observable Inputs (Level 2) | U.S. government agencies
    
Recurring Fair Value Measurements    
Available-for-sale securities 140 155
Fair Value measured on a Recurring Basis | Significant Other Observable Inputs (Level 2) | Mortgage-backed securities of government sponsored entities
    
Recurring Fair Value Measurements    
Available-for-sale securities 77,437 85,830
Fair Value measured on a Recurring Basis | Significant Other Observable Inputs (Level 2) | Private-label collateralized mortgage obligations
    
Recurring Fair Value Measurements    
Available-for-sale securities 792 1,106
Fair Value measured on a Recurring Basis | Significant Other Observable Inputs (Level 2) | State and political subdivisions
    
Recurring Fair Value Measurements    
Available-for-sale securities 22,515 24,427
Fair Value measured on a Recurring Basis | Significant Unobservable Inputs (Level 3) | U.S. government agencies
    
Recurring Fair Value Measurements    
Available-for-sale securities      
Fair Value measured on a Recurring Basis | Significant Unobservable Inputs (Level 3) | Mortgage-backed securities of government sponsored entities
    
Recurring Fair Value Measurements    
Available-for-sale securities      
Fair Value measured on a Recurring Basis | Significant Unobservable Inputs (Level 3) | Private-label collateralized mortgage obligations
    
Recurring Fair Value Measurements    
Available-for-sale securities      
Fair Value measured on a Recurring Basis | Significant Unobservable Inputs (Level 3) | State and political subdivisions
    
Recurring Fair Value Measurements    
Available-for-sale securities