Quarterly report pursuant to Section 13 or 15(d)

Loans Receivable (Parenthetical) (Detail)

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Loans Receivable (Parenthetical) (Detail) (USD $)
In Thousands, unless otherwise specified
Sep. 30, 2012
Dec. 31, 2011
Sep. 30, 2011
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Total Gross Loans $ 1,958,290 $ 1,938,740 $ 1,992,031
Commercial Term Loans Include Owner-Occupied Property Loans [Member]
     
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Total Gross Loans 743,100 776,300  
SBA Loans Include Owner-Occupied Property Loans [Member]
     
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Total Gross Loans $ 115,300 $ 93,600