FAIR VALUE - Schedule of Individually Evaluated Collateral Dependent Loans at Fair Value (Details) $ in Thousands	Mar. 31, 2021 USD ($)
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Individually evaluated collateral dependent loans	$ 4,153
Significant Other Unobservable Inputs (Level 3)
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Individually evaluated collateral dependent loans	4,153
Construction and Development
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Individually evaluated collateral dependent loans	400
Construction and Development | Significant Other Unobservable Inputs (Level 3)
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Individually evaluated collateral dependent loans	400
Commercial Real Estate
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Individually evaluated collateral dependent loans	3,670
Commercial Real Estate | Significant Other Unobservable Inputs (Level 3)
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Individually evaluated collateral dependent loans	3,670
Commercial and Industrial
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Individually evaluated collateral dependent loans	83
Commercial and Industrial | Significant Other Unobservable Inputs (Level 3)
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Individually evaluated collateral dependent loans	$ 83