FAIR VALUE MEASUREMENTS - Quantitative information about Level 3 FV measurements (Details) - USD ($) $ in Thousands		6 Months Ended	12 Months Ended
		Jun. 30, 2019	Dec. 31, 2018
Impaired Loans Receivable [Member] | Fair Value, Inputs, Level 3 [Member] | Appraisal of Collateral [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value Estimate		$ 3,388	$ 3,346
Valuation Technique	[1],[2]	Appraisal of collateral	Appraisal of collateral
Unobservable Input	[3]	Appraisal adjustments	Appraisal adjustments
Impaired Loans Receivable [Member] | Minimum [Member] | Appraisal of Collateral [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value Inputs, Comparability Adjustments		(15.00%)	(15.00%)
Impaired Loans Receivable [Member] | Maximum [Member] | Appraisal of Collateral [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value Inputs, Comparability Adjustments		(73.00%)	(82.00%)
Impaired Loans Receivable [Member] | Weighted Average [Member] | Appraisal of Collateral [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value Inputs, Comparability Adjustments		(18.00%)	(18.00%)
Impaired Loans Receivable, Discounted Cash Flow [Member] | Fair Value, Inputs, Level 3 [Member] | Discounted Cash Flow [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value Estimate		$ 3,023	$ 3,135
Valuation Technique		Discounted cash flow	Discounted cash flow
Unobservable Input		Discount rate	Discount rate
Impaired Loans Receivable, Discounted Cash Flow [Member] | Minimum [Member] | Discounted Cash Flow [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value Inputs, Comparability Adjustments		(7.00%)	(6.00%)
Impaired Loans Receivable, Discounted Cash Flow [Member] | Maximum [Member] | Discounted Cash Flow [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value Inputs, Comparability Adjustments		(7.00%)	(7.00%)
Impaired Loans Receivable, Discounted Cash Flow [Member] | Weighted Average [Member] | Discounted Cash Flow [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value Inputs, Comparability Adjustments		(7.00%)	(7.00%)
Foreclosed assets held for resale [Member] | Fair Value, Inputs, Level 3 [Member] | Appraisal of Collateral [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value Estimate		$ 856	$ 856
Valuation Technique	[1],[2]	Appraisal of collateral	Appraisal of collateral
Unobservable Input	[3]	Appraisal adjustments	Appraisal adjustments
Foreclosed assets held for resale [Member] | Minimum [Member] | Appraisal of Collateral [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value Inputs, Comparability Adjustments		(16.00%)	(16.00%)
Foreclosed assets held for resale [Member] | Maximum [Member] | Appraisal of Collateral [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value Inputs, Comparability Adjustments		(35.00%)	(35.00%)
Foreclosed assets held for resale [Member] | Weighted Average [Member] | Appraisal of Collateral [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value Inputs, Comparability Adjustments		(18.00%)	(18.00%)

[1] Fair value is generally determined through independent appraisals of the underlying collateral, as defined by Bank regulators.

[2] Includes qualitative adjustments by management and estimated liquidation expenses.

[3] Appraisals may be adjusted downward by management for qualitative factors such as economic conditions and estimated liquidation expenses. The typical range of appraisal adjustments are presented as a percent of the appraisal value.