DERIVATIVES (Details 3) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2010	Jun. 30, 2015	Dec. 31, 2014
Derivatives
Fair value of derivative asset			$ 10,752	$ 12,383
Fair value of derivative liability			54,746	56,493
Credit Risk-Related Contingent Feature
Additional collateral required if credit rating is downgraded below investment grade			0	0
Foreign exchange options
Derivatives
Term of contract		5 years
Derivative instruments not designated as hedging instruments
Derivatives
Notional Amount			6,436,134	5,672,472
Fair value of derivative asset	[1]		55,468	55,788
Fair value of derivative liability	[1]		53,996	54,334
Derivative instruments not designated as hedging instruments | Foreign exchange options
Derivatives
Notional Amount				85,614
Fair value of derivative asset	[1]			6,136
Derivative instruments not designated as hedging instruments | Interest rate swaps and caps
Derivatives
Notional Amount			5,403,687	4,858,391
Notional amount of derivative assets			2,720,000	2,450,000
Notional amount of derivative liabilities			2,680,000	2,400,000
Fair value of derivative asset	[1]		44,424	41,534
Fair value of derivative liability	[1]		43,810	41,779
Derivative instruments not designated as hedging instruments | Short-term foreign exchange contracts
Derivatives
Notional Amount			1,030,000	680,600
Fair value of derivative asset			11,000	8,100
Fair value of derivative liability			$ 10,200	$ 9,200

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