FAIR VALUE - Schedule of Quantitative Information About Nonrecurring Level 3 Fair Value Measurements (Details) - Cost to Sell - Other real estate owned - Appraisal value of collateral $ in Thousands	Mar. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)
Assets at fair value on a nonrecurring basis: | Significant Other Unobservable Inputs (Level 3)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Other real estate owned	$ 312	$ 404
Minimum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Other real estate owned, input (percent)	0.10	0.10
Maximum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Other real estate owned, input (percent)	0.20	0.20
Weighted Average
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Other real estate owned, input (percent)	0.16	0.16