DERIVATIVE FINANCIAL INSTRUMENTS AND BALANCE SHEET OFFSETTING (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2014		Dec. 31, 2013
Designated as Hedging Instrument
Fair Values of Derivative Instruments
Notional amount	$ 135,000		$ 135,000
Derivative liabilities	12,824	[1]	16,906	[1]
Designated as Hedging Instrument | Interest rate swaps
Fair Values of Derivative Instruments
Notional amount	135,000		135,000
Derivative liabilities	12,824	[1]	16,906	[1]
Not Designated as Hedging Instrument
Fair Values of Derivative Instruments
Notional amount	5,526,220		4,606,619
Derivative assets	44,529	[1]	40,549	[1]
Derivative liabilities	41,262	[1]	33,356	[1]
Not Designated as Hedging Instrument | Foreign exchange options
Fair Values of Derivative Instruments
Notional amount	85,614		85,614
Derivative assets	6,155	[1]	6,290	[1]
Not Designated as Hedging Instrument | Embedded derivatives liabilities
Fair Values of Derivative Instruments
Notional amount	47,968		51,505
Derivative liabilities	3,426		3,655
Not Designated as Hedging Instrument | Interest rate swaps and caps
Fair Values of Derivative Instruments
Notional amount	4,677,429		3,834,072
Derivative assets	29,170	[1]	28,078	[1]
Derivative liabilities	28,238	[1]	26,352	[1]
Not Designated as Hedging Instrument | Foreign exchange contracts
Fair Values of Derivative Instruments
Notional amount	715,209		635,428
Derivative assets	9,204	[1]	6,181	[1]
Derivative liabilities	$ 9,598	[1]	$ 3,349	[1]

[1] Derivative assets are included in other assets. Derivative liabilities are included in other liabilities and deposits.