DERIVATIVES (Details 4) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Derivative [Line Items]
Derivative liabilities	$ 82,323	$ 81,892
Net reductions to interest expense related to net settlements of derivatives	3,000	3,600
Derivative assets	83,780	79,834
Derivative instruments designated as hedging instruments
Derivative [Line Items]
Notional amount	131,391	199,503
Derivative liabilities	5,976	5,213
Derivative assets	4,325	2,365
Derivative instruments designated as hedging instruments | Interest rate swaps on certificates of deposit
Derivative [Line Items]
Notional amount	48,365	112,913
Derivative liabilities	5,976	5,213
Decrease in notional amount	63,700
Derivative assets	0	0
Derivative instruments designated as hedging instruments | Foreign currency forward contracts
Derivative [Line Items]
Notional amount	83,026	86,590
Derivative liabilities	0	0
Derivative assets	4,325	2,365
Derivative instruments not designated as hedging instruments
Derivative [Line Items]
Notional amount	8,507,660	7,190,926
Derivative liabilities	76,347	76,679
Derivative assets	79,455	77,469
Derivative instruments not designated as hedging instruments | Interest rate swaps and options
Derivative [Line Items]
Notional amount	7,668,482	6,494,900
Derivative liabilities	65,131	67,325
Derivative assets	67,578	67,215
Notional amount of derivative assets	3,860,000	3,250,000
Notional amount of derivative liabilities	3,810,000	3,250,000
Derivative instruments not designated as hedging instruments | Short-term foreign exchange contracts
Derivative [Line Items]
Notional amount	767,800	653,000
Derivative liabilities	11,200	9,400
Derivative assets	11,900	$ 10,300
Term of contract (in years)		1 year
Derivative instruments not designated as hedging instruments | Credit risk participation agreements (“RPAs”)
Derivative [Line Items]
Notional amount	71,414	$ 43,033
Derivative liabilities	3	4
Derivative assets	3	0
Interest rate derivative exposure	$ 179	$ 257
Weighted average remaining maturity	3 years 8 months	3 years 2 months
Derivative instruments not designated as hedging instruments | Credit risk participation agreements (“RPAs”) | Long
Derivative [Line Items]
Notional amount	$ 48,300	$ 33,700
Derivative instruments not designated as hedging instruments | Credit risk participation agreements (“RPAs”) | Short
Derivative [Line Items]
Notional amount	$ 23,100	$ 9,300
Derivative instruments not designated as hedging instruments | Foreign exchange options
Derivative [Line Items]
Term of contract (in years)	5 years