Quarterly report pursuant to Section 13 or 15(d)

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

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Assets and Liabilities Measured at Fair Value on Non-Recurring Basis (Parenthetical) (Detail) (Nonrecurring Basis [Member], USD $)
In Thousands, unless otherwise specified
Sep. 30, 2012
Sep. 30, 2011
Non-Performing Loans Held For Sale [Member] | Commercial Term Loan [Member]
    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Non-Performing Loans Held for sale $ 3,200 $ 3,800
Non-Performing Loans Held For Sale [Member] | Small Business Administration Loans Held For Sale [Member]
    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Non-Performing Loans Held for sale 1,200 434,000
Impaired Loans [Member] | Real Estate Loans [Member]
    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Impaired Loans 4,600 35,600
Impaired Loans [Member] | Commercial and Industrial Loans [Member]
    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Impaired Loans 25,300 66,900
Impaired Loans [Member] | Consumer Loan [Member]
    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Impaired Loans 574,000 875,000
Other Real Estate Owned [Member] | Small Business Administration Loans Held For Sale [Member]
    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Non-Performing Loans Held for sale 261,000  
Other Real Estate Owned [Member] | Commercial Property Loan [Member]
    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Non-Performing Loans Held for sale $ 103,000