FAIR VALUE MEASUREMENTS (Unobservable Inputs Used in Level 3 Fair Value Measurements) (Details) - Level 3 - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2021	Dec. 31, 2020
Loans with impairment
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value disclosure of assets	$ 5,436	$ 4,483
Premises and equipment held for sale
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Premises and equipment held for sale	430	430
Other real estate owned
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value disclosure of assets	$ 2,329	$ 3,109
Minimum | Loans with impairment
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of inputs discount rate	0.00%	0.00%
Minimum | Premises and equipment held for sale
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of inputs discount rate	0.00%	0.00%
Minimum | Other real estate owned
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of inputs discount rate	0.00%	0.00%
Maximum | Loans with impairment
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of inputs discount rate	50.00%	50.00%
Maximum | Premises and equipment held for sale
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of inputs discount rate	25.00%	25.00%
Maximum | Other real estate owned
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of inputs discount rate	50.00%	50.00%
Weighted Average | Loans with impairment
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of inputs discount rate	14.00%	23.00%
Weighted Average | Premises and equipment held for sale
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of inputs discount rate	10.00%	10.00%
Weighted Average | Other real estate owned
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of inputs discount rate	49.00%	47.00%