DERIVATIVES DERIVATIVES - Disclosure by Type of Financial Instrument (Details) - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
Derivatives, Fair Value [Line Items]
Gross amounts of recognized liabilities	$ 32,245	$ 14,135
Derivative Liability, Fair Value, Gross Asset	(32,580)	(16,710)
Derivative Asset, Fair Value, Amount Not Offset Against Collateral	(335)	(2,575)
Fair Value Hedges | Pay fixed interest rate swaps with counterparty | Accrued interest and other liabilities
Derivatives, Fair Value [Line Items]
Gross amounts of recognized liabilities	59	120
Derivative Liability, Fair Value, Gross Asset	0	0
Derivative Asset, Fair Value, Amount Not Offset Against Collateral	59	120
Fair Value Hedges | Matched interest rate swaps | Accrued interest and other liabilities
Derivatives, Fair Value [Line Items]
Gross amounts of recognized liabilities	32,186	14,015
Derivative Liability, Fair Value, Gross Asset	(32,580)	(16,710)
Derivative Asset, Fair Value, Amount Not Offset Against Collateral	$ (394)	$ (2,695)