FAIR VALUE MEASUREMENTS - Quantitative information about Level 3 FV measurements (Details) - Fair Value, Inputs, Level 3 [Member] - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Impaired loans - collateral dependent | Appraisal Of Collateral, Certificate of Inspection [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value Estimate	$ 3,679	$ 3,419
Valuation Technique	Appraisal of collateral1,3Certificate of Inspection1,3	Appraisal of collateral1,3Certificate of Inspection1,3
Unobservable Input	Appraisal adjustments2Qualitative Adjustments4	Appraisal adjustments2Qualitative Adjustments4
Impaired loans - collateral dependent | Minimum [Member] | Appraisal Of Collateral, Certificate of Inspection [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value Inputs, Comparability Adjustments	(15.00%)	(10.00%)
Impaired loans - collateral dependent | Maximum [Member] | Appraisal Of Collateral, Certificate of Inspection [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value Inputs, Comparability Adjustments	(73.00%)	(77.00%)
Impaired loans - collateral dependent | Weighted Average [Member] | Appraisal Of Collateral, Certificate of Inspection [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value Inputs, Comparability Adjustments	(17.00%)	(17.00%)
Impaired Loans Receivable Discounted Cash Flow [Member] | Discounted Cash Flow [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Valuation Technique	Discounted cash flow	Discounted cash flow
Unobservable Input	Discount rate	Discount rate
Impaired loans - other | Discounted Cash Flow [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value Estimate	$ 2,929	$ 3,020
Impaired loans - other | Minimum [Member] | Discounted Cash Flow [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value Inputs, Comparability Adjustments	(7.00%)	(7.00%)
Impaired loans - other | Maximum [Member] | Discounted Cash Flow [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value Inputs, Comparability Adjustments	(7.00%)	(8.00%)
Impaired loans - other | 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] | Appraisal Of Collateral, Certificate of Inspection [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value Estimate	$ 28	$ 81
Valuation Technique	Appraisal of collateral1,3Certificate of Inspection1,3	Appraisal of collateral1,3Certificate of Inspection1,3
Unobservable Input	Appraisal adjustments2Qualitative Adjustments4	Appraisal adjustments2Qualitative Adjustments4
Foreclosed assets held for resale [Member] | Minimum [Member] | Appraisal Of Collateral, Certificate of Inspection [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value Inputs, Comparability Adjustments	(28.00%)	(35.00%)
Foreclosed assets held for resale [Member] | Maximum [Member] | Appraisal Of Collateral, Certificate of Inspection [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value Inputs, Comparability Adjustments	(28.00%)	(35.00%)
Foreclosed assets held for resale [Member] | Weighted Average [Member] | Appraisal Of Collateral, Certificate of Inspection [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value Inputs, Comparability Adjustments	(28.00%)	(35.00%)