DERIVATIVES (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014		Dec. 31, 2013
Designated as Hedging Instrument
Fair Values of Derivative Instruments
Notional amount	$ 132,667		$ 135,000
Derivative liabilities	9,922	[1]	16,906	[1]
Designated as Hedging Instrument | Interest rate swaps on certificates of deposits
Fair Values of Derivative Instruments
Notional amount	132,667		135,000
Derivative liabilities	9,922	[1]	16,906	[1]
Derivative instruments not designated as hedging instruments
Fair Values of Derivative Instruments
Notional amount	5,672,472		4,606,619
Derivative assets	55,793		40,549	[1]
Derivative liabilities	54,342	[1]	33,356	[1]
Derivative instruments not designated as hedging instruments | Foreign exchange options
Fair Values of Derivative Instruments
Notional amount	85,614		85,614
Derivative assets	6,136		6,290
Derivative instruments not designated as hedging instruments | Embedded derivatives liabilities
Fair Values of Derivative Instruments
Notional amount	47,838		51,505
Derivative liabilities	3,392	[1]	3,655	[1]
Derivative instruments not designated as hedging instruments | Interest rate swaps and caps
Fair Values of Derivative Instruments
Notional amount	4,858,391		3,834,072
Derivative assets	41,534		28,078	[1]
Derivative liabilities	41,779	[1]	26,352	[1]
Derivative instruments not designated as hedging instruments | Foreign exchange contracts
Fair Values of Derivative Instruments
Notional amount	680,629		635,428
Derivative assets	8,123		6,181
Derivative liabilities	$ 9,171	[1]	$ 3,349	[1]

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