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Loans - Recorded Investment In loans By Portfolio Segment (Detail) (USD $)
In Thousands, unless otherwise specified
Sep. 30, 2012
Jun. 30, 2012
Dec. 31, 2011
Sep. 30, 2011
Jun. 30, 2011
Dec. 31, 2010
Financing Receivable, Allowance for Credit Losses [Line Items]            
Commercial $ 18,187   $ 25,994      
Single-family residential 15,425   18,214      
Multi-family residential 22,900   27,163      
Commercial 57,687   69,757      
Home equity lines of credit 13,145   14,921      
Other 1,038   1,221      
Subtotal 128,382   157,270      
Less: ALLL (5,442) (5,434) (6,110) (6,955) (8,050) (9,758)
Loans, net $ 122,940   $ 151,160