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Fair Value of Financial Instruments (Assets Measured at Fair Value on a Recurring Basis) (Details) (USD $)
In Thousands, unless otherwise specified
Mar. 31, 2014
Dec. 31, 2013
Fair Value, Assets Measured on Recurring Basis, Input Reconciliation [Line Items]    
Available-for-sale securities $ 592,097 $ 606,108
Held-to-maturity securities 47,599 46,094
U.S. Treasury and government agencies
    
Fair Value, Assets Measured on Recurring Basis, Input Reconciliation [Line Items]    
Available-for-sale securities 19 20
U.S. government sponsored agencies
    
Fair Value, Assets Measured on Recurring Basis, Input Reconciliation [Line Items]    
Available-for-sale securities 295 319
States and political subdivisions
    
Fair Value, Assets Measured on Recurring Basis, Input Reconciliation [Line Items]    
Available-for-sale securities 51,668 50,962
Residential mortgage-backed securities
    
Fair Value, Assets Measured on Recurring Basis, Input Reconciliation [Line Items]    
Available-for-sale securities 500,516 510,097
Commercial mortgage-backed securities
    
Fair Value, Assets Measured on Recurring Basis, Input Reconciliation [Line Items]    
Available-for-sale securities 26,750 32,304
Bank-issued trust preferred securities
    
Fair Value, Assets Measured on Recurring Basis, Input Reconciliation [Line Items]    
Available-for-sale securities 7,995 7,829
Equity securities
    
Fair Value, Assets Measured on Recurring Basis, Input Reconciliation [Line Items]    
Available-for-sale securities 4,854 4,577
Fair Value of Securities | Fair Value
    
Fair Value, Assets Measured on Recurring Basis, Input Reconciliation [Line Items]    
Held-to-maturity securities 47,599 46,094
Fair Value of Securities | Quoted Prices in Active Markets for Identical Assets (Level 1)
    
Fair Value, Assets Measured on Recurring Basis, Input Reconciliation [Line Items]    
Held-to-maturity securities 0 0
Fair Value of Securities | Significant Other Observable Inputs (Level 2)
    
Fair Value, Assets Measured on Recurring Basis, Input Reconciliation [Line Items]    
Held-to-maturity securities 47,599 46,094
Fair Value of Securities | Significant Unobservable Inputs (Level 3)
    
Fair Value, Assets Measured on Recurring Basis, Input Reconciliation [Line Items]    
Held-to-maturity securities 0 0
Fair Value of Securities | States and political subdivisions | Fair Value
    
Fair Value, Assets Measured on Recurring Basis, Input Reconciliation [Line Items]    
Held-to-maturity securities 4,037 3,929
Fair Value of Securities | States and political subdivisions | Quoted Prices in Active Markets for Identical Assets (Level 1)
    
Fair Value, Assets Measured on Recurring Basis, Input Reconciliation [Line Items]    
Held-to-maturity securities 0 0
Fair Value of Securities | States and political subdivisions | Significant Other Observable Inputs (Level 2)
    
Fair Value, Assets Measured on Recurring Basis, Input Reconciliation [Line Items]    
Held-to-maturity securities 4,037 3,929
Fair Value of Securities | States and political subdivisions | Significant Unobservable Inputs (Level 3)
    
Fair Value, Assets Measured on Recurring Basis, Input Reconciliation [Line Items]    
Held-to-maturity securities 0 0
Fair Value of Securities | Residential mortgage-backed securities | Fair Value
    
Fair Value, Assets Measured on Recurring Basis, Input Reconciliation [Line Items]    
Held-to-maturity securities 36,030 34,530
Fair Value of Securities | Residential mortgage-backed securities | Quoted Prices in Active Markets for Identical Assets (Level 1)
    
Fair Value, Assets Measured on Recurring Basis, Input Reconciliation [Line Items]    
Held-to-maturity securities 0 0
Fair Value of Securities | Residential mortgage-backed securities | Significant Other Observable Inputs (Level 2)
    
Fair Value, Assets Measured on Recurring Basis, Input Reconciliation [Line Items]    
Held-to-maturity securities 36,030 34,530
Fair Value of Securities | Residential mortgage-backed securities | Significant Unobservable Inputs (Level 3)
    
Fair Value, Assets Measured on Recurring Basis, Input Reconciliation [Line Items]    
Held-to-maturity securities 0 0
Fair Value of Securities | Commercial mortgage-backed securities | Fair Value
    
Fair Value, Assets Measured on Recurring Basis, Input Reconciliation [Line Items]    
Held-to-maturity securities 7,532 7,635
Fair Value of Securities | Commercial mortgage-backed securities | Quoted Prices in Active Markets for Identical Assets (Level 1)
    
Fair Value, Assets Measured on Recurring Basis, Input Reconciliation [Line Items]    
Held-to-maturity securities 0 0
Fair Value of Securities | Commercial mortgage-backed securities | Significant Other Observable Inputs (Level 2)
    
Fair Value, Assets Measured on Recurring Basis, Input Reconciliation [Line Items]    
Held-to-maturity securities 7,532 7,635
Fair Value of Securities | Commercial mortgage-backed securities | Significant Unobservable Inputs (Level 3)
    
Fair Value, Assets Measured on Recurring Basis, Input Reconciliation [Line Items]    
Held-to-maturity securities 0 0
Recurring Basis [Member] | Fair Value
    
Fair Value, Assets Measured on Recurring Basis, Input Reconciliation [Line Items]    
Available-for-sale securities 592,097 606,108
Recurring Basis [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1)
    
Fair Value, Assets Measured on Recurring Basis, Input Reconciliation [Line Items]    
Available-for-sale securities 4,719 4,443
Recurring Basis [Member] | Significant Other Observable Inputs (Level 2)
    
Fair Value, Assets Measured on Recurring Basis, Input Reconciliation [Line Items]    
Available-for-sale securities 587,378 601,665
Recurring Basis [Member] | Significant Unobservable Inputs (Level 3)
    
Fair Value, Assets Measured on Recurring Basis, Input Reconciliation [Line Items]    
Available-for-sale securities 0 0
Recurring Basis [Member] | U.S. Treasury and government agencies | Fair Value
    
Fair Value, Assets Measured on Recurring Basis, Input Reconciliation [Line Items]    
Available-for-sale securities 19 20
Recurring Basis [Member] | U.S. Treasury and government agencies | Quoted Prices in Active Markets for Identical Assets (Level 1)
    
Fair Value, Assets Measured on Recurring Basis, Input Reconciliation [Line Items]    
Available-for-sale securities 0 0
Recurring Basis [Member] | U.S. Treasury and government agencies | Significant Other Observable Inputs (Level 2)
    
Fair Value, Assets Measured on Recurring Basis, Input Reconciliation [Line Items]    
Available-for-sale securities 19 20
Recurring Basis [Member] | U.S. Treasury and government agencies | Significant Unobservable Inputs (Level 3)
    
Fair Value, Assets Measured on Recurring Basis, Input Reconciliation [Line Items]    
Available-for-sale securities 0 0
Recurring Basis [Member] | U.S. government sponsored agencies | Fair Value
    
Fair Value, Assets Measured on Recurring Basis, Input Reconciliation [Line Items]    
Available-for-sale securities 295 319
Recurring Basis [Member] | U.S. government sponsored agencies | Quoted Prices in Active Markets for Identical Assets (Level 1)
    
Fair Value, Assets Measured on Recurring Basis, Input Reconciliation [Line Items]    
Available-for-sale securities 0 0
Recurring Basis [Member] | U.S. government sponsored agencies | Significant Other Observable Inputs (Level 2)
    
Fair Value, Assets Measured on Recurring Basis, Input Reconciliation [Line Items]    
Available-for-sale securities 295 319
Recurring Basis [Member] | U.S. government sponsored agencies | Significant Unobservable Inputs (Level 3)
    
Fair Value, Assets Measured on Recurring Basis, Input Reconciliation [Line Items]    
Available-for-sale securities 0 0
Recurring Basis [Member] | States and political subdivisions | Fair Value
    
Fair Value, Assets Measured on Recurring Basis, Input Reconciliation [Line Items]    
Available-for-sale securities 51,668 50,962
Recurring Basis [Member] | States and political subdivisions | Quoted Prices in Active Markets for Identical Assets (Level 1)
    
Fair Value, Assets Measured on Recurring Basis, Input Reconciliation [Line Items]    
Available-for-sale securities 0 0
Recurring Basis [Member] | States and political subdivisions | Significant Other Observable Inputs (Level 2)
    
Fair Value, Assets Measured on Recurring Basis, Input Reconciliation [Line Items]    
Available-for-sale securities 51,668 50,962
Recurring Basis [Member] | States and political subdivisions | Significant Unobservable Inputs (Level 3)
    
Fair Value, Assets Measured on Recurring Basis, Input Reconciliation [Line Items]    
Available-for-sale securities 0 0
Recurring Basis [Member] | Residential mortgage-backed securities | Fair Value
    
Fair Value, Assets Measured on Recurring Basis, Input Reconciliation [Line Items]    
Available-for-sale securities 500,516 510,097
Recurring Basis [Member] | Residential mortgage-backed securities | Quoted Prices in Active Markets for Identical Assets (Level 1)
    
Fair Value, Assets Measured on Recurring Basis, Input Reconciliation [Line Items]    
Available-for-sale securities 0 0
Recurring Basis [Member] | Residential mortgage-backed securities | Significant Other Observable Inputs (Level 2)
    
Fair Value, Assets Measured on Recurring Basis, Input Reconciliation [Line Items]    
Available-for-sale securities 500,516 510,097
Recurring Basis [Member] | Residential mortgage-backed securities | Significant Unobservable Inputs (Level 3)
    
Fair Value, Assets Measured on Recurring Basis, Input Reconciliation [Line Items]    
Available-for-sale securities 0 0
Recurring Basis [Member] | Commercial mortgage-backed securities | Fair Value
    
Fair Value, Assets Measured on Recurring Basis, Input Reconciliation [Line Items]    
Available-for-sale securities 26,750 32,304
Recurring Basis [Member] | Commercial mortgage-backed securities | Quoted Prices in Active Markets for Identical Assets (Level 1)
    
Fair Value, Assets Measured on Recurring Basis, Input Reconciliation [Line Items]    
Available-for-sale securities 0 0
Recurring Basis [Member] | Commercial mortgage-backed securities | Significant Other Observable Inputs (Level 2)
    
Fair Value, Assets Measured on Recurring Basis, Input Reconciliation [Line Items]    
Available-for-sale securities 26,750 32,304
Recurring Basis [Member] | Commercial mortgage-backed securities | Significant Unobservable Inputs (Level 3)
    
Fair Value, Assets Measured on Recurring Basis, Input Reconciliation [Line Items]    
Available-for-sale securities 0 0
Recurring Basis [Member] | Bank-issued trust preferred securities | Fair Value
    
Fair Value, Assets Measured on Recurring Basis, Input Reconciliation [Line Items]    
Available-for-sale securities 7,995 7,829
Recurring Basis [Member] | Bank-issued trust preferred securities | Quoted Prices in Active Markets for Identical Assets (Level 1)
    
Fair Value, Assets Measured on Recurring Basis, Input Reconciliation [Line Items]    
Available-for-sale securities 0 0
Recurring Basis [Member] | Bank-issued trust preferred securities | Significant Other Observable Inputs (Level 2)
    
Fair Value, Assets Measured on Recurring Basis, Input Reconciliation [Line Items]    
Available-for-sale securities 7,995 7,829
Recurring Basis [Member] | Bank-issued trust preferred securities | Significant Unobservable Inputs (Level 3)
    
Fair Value, Assets Measured on Recurring Basis, Input Reconciliation [Line Items]    
Available-for-sale securities 0 0
Recurring Basis [Member] | Equity securities | Fair Value
    
Fair Value, Assets Measured on Recurring Basis, Input Reconciliation [Line Items]    
Available-for-sale securities 4,854 4,577
Recurring Basis [Member] | Equity securities | Quoted Prices in Active Markets for Identical Assets (Level 1)
    
Fair Value, Assets Measured on Recurring Basis, Input Reconciliation [Line Items]    
Available-for-sale securities 4,719 4,443
Recurring Basis [Member] | Equity securities | Significant Other Observable Inputs (Level 2)
    
Fair Value, Assets Measured on Recurring Basis, Input Reconciliation [Line Items]    
Available-for-sale securities 135 134
Recurring Basis [Member] | Equity securities | Significant Unobservable Inputs (Level 3)
    
Fair Value, Assets Measured on Recurring Basis, Input Reconciliation [Line Items]    
Available-for-sale securities $ 0 $ 0