Quarterly report pursuant to Section 13 or 15(d)

Financial Assets And Liabilities Carried At Fair Value On Recurring Basis (Detail)

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Financial Assets And Liabilities Carried At Fair Value On Recurring Basis (Detail) (Fair Value, Measurements, Recurring, USD $)
In Thousands, unless otherwise specified
Jun. 30, 2012
Dec. 31, 2011
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]    
Total assets $ 297,071 $ 294,435
U.S. Treasury and government sponsored agencies
    
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]    
Available-for-sale securities 87,915 99,622
Mortgage-backed securities
    
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]    
Available-for-sale securities 89,330 92,580
State and municipal securities
    
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]    
Available-for-sale securities 113,463 100,526
Corporate debt
    
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]    
Available-for-sale securities 5,800 1,081
Interest rate swap agreements
    
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]    
Derivative assets 563 617
Derivative liabilities 563 617
Interest rate cap
    
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]    
Derivative assets   9
Significant Other Observable Inputs (Level 2)
    
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]    
Total assets 297,071 294,435
Significant Other Observable Inputs (Level 2) | U.S. Treasury and government sponsored agencies
    
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]    
Available-for-sale securities 87,915 99,622
Significant Other Observable Inputs (Level 2) | Mortgage-backed securities
    
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]    
Available-for-sale securities 89,330 92,580
Significant Other Observable Inputs (Level 2) | State and municipal securities
    
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]    
Available-for-sale securities 113,463 100,526
Significant Other Observable Inputs (Level 2) | Corporate debt
    
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]    
Available-for-sale securities 5,800 1,081
Significant Other Observable Inputs (Level 2) | Interest rate swap agreements
    
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]    
Derivative assets 563 617
Derivative liabilities 563 617
Significant Other Observable Inputs (Level 2) | Interest rate cap
    
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]    
Derivative assets   $ 9