PREMISES AND EQUIPMENT (Details) (USD $)	3 Months Ended		9 Months Ended			1 Months Ended
	Sep. 30, 2011	Dec. 31, 2010	Sep. 30, 2011 Furniture and Fixtures [Member]	Sep. 30, 2011 Office Equipment [Member]	Sep. 30, 2011 Building and Building Improvements [Member]	May 31, 2011 Sale of Building [Member]	May 31, 2011 Sale of Branch [Member]
Property, Plant and Equipment [Line Items]
Premises and equipment, gross	$ 177,100,000	$ 196,600,000
Accumulated depreciation and amortization	58,100,000	60,700,000
Premises and equipment, net	119,035,000	135,919,000
Estimated useful life (in years)			7	5	25
Premises and equipment sold						18,500,000	2,600,000
Gain on sale of property						4,400,000	400,000
Selling costs of property sold						800,000
Gain on sale property accounted for using installment method						1,800,000
Gain on sale of property to be recognized in the future						2,600,000
Bank purchased new ATM machines	$ 2,400,000