DERIVATIVE FINANCIAL INSTRUMENTS (Details 3) (USD $)	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Derivative Instruments, Gain (Loss)
Termination value of derivatives in a net liability position	$ 18,300,000
Designated as Hedging Instrument
Derivative Instruments, Gain (Loss)
Net (losses) gains on derivative instruments	2,930,000
Designated as Hedging Instrument | Interest rate swaps | Interest Expense
Derivative Instruments, Gain (Loss)
Net (losses) gains on derivative instruments	2,930,000
Not Designated as Hedging Instrument
Derivative Instruments, Gain (Loss)
Net (losses) gains on derivative instruments	(570,000)	42,000	312,000
Not Designated as Hedging Instrument | Interest rate swaps | Noninterest Income.
Derivative Instruments, Gain (Loss)
Net (losses) gains on derivative instruments	(447,000)
Not Designated as Hedging Instrument | Equity swap agreements | Noninterest Expense.
Derivative Instruments, Gain (Loss)
Net (losses) gains on derivative instruments	2,000	(138,000)	312,000
Not Designated as Hedging Instrument | Foreign exchange options | Noninterest Income.
Derivative Instruments, Gain (Loss)
Net (losses) gains on derivative instruments	(392,000)
Not Designated as Hedging Instrument | Foreign exchange options | Noninterest Expense.
Derivative Instruments, Gain (Loss)
Net (losses) gains on derivative instruments	16,000
Not Designated as Hedging Instrument | Short-term Foreign Exchange | Noninterest Income.
Derivative Instruments, Gain (Loss)
Net (losses) gains on derivative instruments	$ 251,000	$ 180,000