FAIR VALUE OF FINANCIAL INSTRUMENTS - Qualitative Information About Level 3 Fair Value Measurements (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2019	Dec. 31, 2018
Impaired loans
Qualitative and Quantitative Information, Transferor's Continuing Involvement [Line Items]
Fair Value Estimate	$ 1,695	$ 1,785
Impaired loans | Significant Unobservable Inputs (Level III)
Qualitative and Quantitative Information, Transferor's Continuing Involvement [Line Items]
Fair Value Estimate	$ 1,695	$ 1,785
Impaired loans | Minimum | Significant Unobservable Inputs (Level III)
Qualitative and Quantitative Information, Transferor's Continuing Involvement [Line Items]
Range (Weighted Average)	0.00%	0.00%
Impaired loans | Maximum | Significant Unobservable Inputs (Level III)
Qualitative and Quantitative Information, Transferor's Continuing Involvement [Line Items]
Range (Weighted Average)	(100.00%)	(100.00%)
Impaired loans | Weighted Average | Significant Unobservable Inputs (Level III)
Qualitative and Quantitative Information, Transferor's Continuing Involvement [Line Items]
Range (Weighted Average)	(7.29%)	(7.76%)
Foreclosed real estate
Qualitative and Quantitative Information, Transferor's Continuing Involvement [Line Items]
Fair Value Estimate		$ 730
Foreclosed real estate | Significant Unobservable Inputs (Level III)
Qualitative and Quantitative Information, Transferor's Continuing Involvement [Line Items]
Fair Value Estimate		$ 730
Range (Weighted Average)		(7.00%)
Foreclosed real estate | Weighted Average | Significant Unobservable Inputs (Level III)
Qualitative and Quantitative Information, Transferor's Continuing Involvement [Line Items]
Range (Weighted Average)		(7.00%)