DERIVATIVES DERIVATIVES - Disclosure by Type of Financial Instrument (Details) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Derivatives, Fair Value [Line Items]
Gross amounts of recognized liabilities	$ 18,835	$ 11,916
Derivative Liability, Fair Value, Gross Asset	(18,000)	(12,260)
Derivative Liability, Fair Value, Amount Not Offset Against Collateral	835
Derivative Asset, Fair Value, Amount Not Offset Against Collateral		344
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	235	440
Derivative Liability, Fair Value, Gross Asset	(84)	0
Derivative Liability, Fair Value, Amount Not Offset Against Collateral	151
Derivative Asset, Fair Value, Amount Not Offset Against Collateral		(440)
Fair Value Hedges | Matched interest rate swaps | Accrued interest and other liabilities
Derivatives, Fair Value [Line Items]
Gross amounts of recognized liabilities	18,600	11,476
Derivative Liability, Fair Value, Gross Asset	(17,916)	(12,260)
Derivative Liability, Fair Value, Amount Not Offset Against Collateral	$ 684
Derivative Asset, Fair Value, Amount Not Offset Against Collateral		$ 784