FAIR VALUE - Unobservable Inputs (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Corporate Bonds and Notes
Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Balance of recurring Level 3 assets at January 1	$ 248	$ 0
Derivative instruments entered into	0	0
Included in earnings - other non-interest income	0	0
Included in other comprehensive income	4	0
Transfers into Level 3	0	0
Balance of recurring Level 3 assets at March 31	252	0
Derivative Liabilities
Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Balance of recurring Level 3 assets at January 1	(48)	(18)
Derivative instruments entered into	(2)	0
Included in earnings - other non-interest income	(34)	(15)
Included in other comprehensive income	0	0
Transfers into Level 3	0	0
Balance of recurring Level 3 assets at March 31	$ (84)	$ (33)