LOANS AND ALLOWANCE FOR LOAN LOSSES (Textual) (Details) (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans and leases receivable, gross, consumer, real estate, required interest only payments	$ 25,300,000	$ 40,200,000
Delinquency percent, residential real estate mortgages that require interest only payments as a percentage of total residential real estate mortgages that require interest only payments	5.10%	14.50%
Percent of total loan portfolio collateralized	99.00%	99.00%
Loans pledged as collateral	1,170,000,000	1,400,000,000
Impaired financing receivable individually evaluated for impairment	119,483,000	209,169,000
Loan and leases receivable, impaired	238,800,000	346,700,000
Loans and leases receivable, troubled debt, interest income under original terms not recorded	21,700,000	34,200,000	46,300,000
Loans and leases receivable, impaired, troubled debt, interest income	6,000,000	8,000,000	14,200,000
Loans and leases receivable, impaired, average recorded investment	283,500,000	418,400,000	619,400,000
Loans and leases receivable, impaired, troubled debt, interest income recognized during term of impairment	4,400,000	3,600,000	5,900,000
Allowance allocated to troubled debt restructurings	17,952,000	30,629,000
Minimum
Financing Receivable, Allowance for Credit Losses [Line Items]
Impaired financing receivable individually evaluated for impairment	500,000
Real Estate Construction and Development
Financing Receivable, Allowance for Credit Losses [Line Items]
Total real estate loans as a percentage of total loan portfolio	79.00%	77.00%
Impaired financing receivable individually evaluated for impairment	39,155,000	76,475,000
Allowance allocated to troubled debt restructurings	1,452,000	3,432,000
Residential Real Estate Mortgages, Home Equity Lines of Credit
Financing Receivable, Allowance for Credit Losses [Line Items]
Residential real estate mortgages and home equity lines of credit as a percentage of total real estate loans	46.00%	37.00%
Impaired Loans
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing receivable, allowance for credit losses, accumulated write-downs	103,900,000	180,500,000
Hamp Program
Financing Receivable, Allowance for Credit Losses [Line Items]
Troubled debt restructurings under HAMP program	75,700,000	75,900,000
Troubled Debt Restructurings
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance allocated to troubled debt restructurings	$ 9,500,000	$ 12,800,000