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NON-COVERED LOANS AND ALLOWANCE FOR LOAN LOSSES (Details 9) (USD $)
Mar. 31, 2012
Dec. 31, 2011
Allowance for Unfunded Loan Commitments, Off-Balance Sheet Credit Exposures and Recourse Provisions    
Allowance for unfunded loan commitments, off-balance sheet credit exposures and recourse provisions $ 12,800,000 $ 11,000,000
Off-balance sheet loans serviced for others 1,990,000,000 2,100,000,000
Portion of allowance for unfunded loan commitments, off-balance sheet credit exposures and recourse provisions related to off-balance sheet loans serviced for others $ 6,000,000 $ 4,400,000