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LOANS (covered) - Additional Information (Detail) (Covered Loans, USD $)
3 Months Ended 6 Months Ended
Jun. 30, 2011
Jun. 30, 2010
Jun. 30, 2011
Jun. 30, 2010
Jun. 30, 2011
Loans Accounted for Under FASB ASC Topic 310-30
Dec. 31, 2010
Loans Accounted for Under FASB ASC Topic 310-30
Accounts, Notes, Loans and Financing Receivable [Line Items]            
Outstanding balance including contractual principal, interest, fees, and penalties         $ 1,900,000,000 $ 2,200,000,000
Reclassification from non-accretable difference $ 11,229,000 $ 0 $ 33,206,000 $ 0