Quarterly report pursuant to Section 13 or 15(d)

Assets and Liabilities Measured at Fair Value on Non-Recurring Basis (Detail)

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Assets and Liabilities Measured at Fair Value on Non-Recurring Basis (Detail) (Nonrecurring Basis [Member], USD $)
In Thousands, unless otherwise specified
 3 Months Ended 9 Months Ended
Sep. 30, 2012
Sep. 30, 2011
Sep. 30, 2012
Sep. 30, 2011
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Unrealized Losses on Non-performing Loans Held for Sale $ 519 [1]   $ 2,300 [1] $ 2,488 [2]
Unrealized Losses Impaired Loans 2,259 [3] 16,328 [4]    
Unrealized Losses Other Real Estate Owned 244 [5]      
Unrealized Losses Impaired Loans     4,303 [3] 29,264 [4]
Unrealized Losses Other Real Estate Owned     301 [5] 194 [6]
Quoted Prices in Active Markets for Identical Assets [Member]
        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Non-Performing Loans Held for sale    [1]    [2]    [1]    [2]
Impaired Loans    [3]    [4]    [3]    [4]
Other Real Estate Owned    [5]    [6]    [5]    [6]
Significant Observable Inputs With No Active Market With Identical Characteristics [Member]
        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Impaired Loans 19,919 [3]   19,919 [3]  
Significant Unobservable Inputs [Member]
        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Non-Performing Loans Held for sale 4,421 [1] 4,246 [2] 4,421 [1] 4,246 [2]
Impaired Loans 10,594 [3] 103,410 [4] 10,594 [3] 103,410 [4]
Other Real Estate Owned $ 364 [5] $ 248 [6] $ 364 [5] $ 248 [6]
[1] Includes commercial term loans of $3.2 million and SBA loans of $1.2 million
[2] Includes commercial term loans of $3.8 million and SBA loans of $434,000
[3] Includes real estate loans of $4.6 million, commercial and industrial loans of $25.3 million, and consumer loans of $574,000
[4] Includes real estate loans of $35.6 million, commercial and industrial loans of $66.9 million, and consumer loans of $875,000
[5] Includes properties from the foreclosure of a commercial property loan of $103,000 and a SBA loan of $261,000
[6] Includes a property from the foreclosure of a SBA loan