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LOANS (covered) - Additional Information (Detail) (Covered Loans, USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Accounts, Notes, Loans and Financing Receivable [Line Items]
Reclassification from non-accretable difference	$ 29,606,000	$ 39,079,000	$ 97,808,000
Loans, Federal Deposit Insurance Corporation Reimbursement Percentage on Losses Below Threshold	80.00%
Loans, Federal Deposit Insurance Corporation Reimbursement Percentage on Losses Above Threshold	95.00%
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	$ 1,100,000,000	$ 1,600,000,000

The change in the estimate of cash flows expected to be collected, after acquisition of loans, which results in an increase in accretable yield (for example, if actual cash flows are significantly greater than previously expected). This relates to loans not accounted for as debt securities, with evidence of deterioration of credit quality since origination that was acquired by completion of a transfer for which it is probable, at acquisition, that the investor will be unable to collect all contractually required payments receivable.

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