FAIR VALUE - Fair Value of Foreclosed Assets (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Carrying Value | Other real estate owned remeasured at initial recognition:
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Foreclosed assets	$ 542	$ 1,082
Carrying Value | Foreclosed assets remeasured subsequent to initial recognition:
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Foreclosed assets	599	0	$ 170
Charge-offs | Other real estate owned remeasured at initial recognition:
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Foreclosed assets	(25)	(195)
Charge-offs | Foreclosed assets remeasured subsequent to initial recognition:
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Foreclosed assets	(56)	0	(69)
Fair Value | Other real estate owned remeasured at initial recognition:
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Foreclosed assets	517	887
Fair Value | Foreclosed assets remeasured subsequent to initial recognition:
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Foreclosed assets	$ 543	$ 0	$ 101