FAIR VALUE - Fair Value of Foreclosed Assets (Details) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016	Sep. 30, 2016
Carrying Value | Foreclosed assets remeasured at initial recognition
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Foreclosed assets	$ 544	$ 78	$ 67
Carrying Value | Foreclosed assets remeasured subsequent to initial recognition
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Foreclosed assets	0	170	180
Charge-offs | Foreclosed assets remeasured at initial recognition
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Foreclosed assets	(175)	(11)	(11)
Charge-offs | Foreclosed assets remeasured subsequent to initial recognition
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Foreclosed assets	0	(69)	(79)
Fair Value | Foreclosed assets remeasured at initial recognition
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Foreclosed assets	369	67	56
Fair Value | Foreclosed assets remeasured subsequent to initial recognition
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Foreclosed assets	$ 0	$ 101	$ 101