DERIVATIVES (Details) - USD ($) $ in Thousands		Jun. 30, 2015	Dec. 31, 2014
Fair Values of Derivative Instruments
Derivative Assets		$ 10,752	$ 12,383
Derivative Liabilities		54,746	56,493
Designated as Hedging Instrument
Fair Values of Derivative Instruments
Notional Amount		116,642	132,667
Derivative Liabilities	[1]	8,177	9,922
Designated as Hedging Instrument | Interest rate swaps on certificates of deposit
Fair Values of Derivative Instruments
Notional Amount		116,642	132,667
Derivative Liabilities	[1]	8,177	9,922
Derivative instruments not designated as hedging instruments
Fair Values of Derivative Instruments
Notional Amount		6,436,134	5,672,472
Derivative Assets	[1]	55,468	55,788
Derivative Liabilities	[1]	53,996	54,334
Derivative instruments not designated as hedging instruments | Foreign exchange options
Fair Values of Derivative Instruments
Notional Amount			85,614
Derivative Assets	[1]		6,136
Derivative instruments not designated as hedging instruments | Embedded derivative liabilities
Fair Values of Derivative Instruments
Notional Amount			47,838
Derivative Liabilities	[1]		3,392
Derivative instruments not designated as hedging instruments | Interest rate swaps and caps
Fair Values of Derivative Instruments
Notional Amount		5,403,687	4,858,391
Derivative Assets	[1]	44,424	41,534
Derivative Liabilities	[1]	43,810	41,779
Derivative instruments not designated as hedging instruments | Foreign exchange contracts
Fair Values of Derivative Instruments
Notional Amount		1,032,447	680,629
Derivative Assets	[1]	11,044	8,118
Derivative Liabilities	[1]	$ 10,186	$ 9,163

[1] Derivative assets are included in Other Assets. Derivative liabilities are included in Accrued Expenses and Other liabilities, and Interest-Bearing Deposits.