FAIR VALUE - Schedule of Individually Evaluated Collateral Dependent Loans at Fair Value (Details) $ in Thousands	Sep. 30, 2021 USD ($)
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Individually evaluated collateral dependent loans	$ 4,418
Significant Other Unobservable Inputs (Level 3)
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Individually evaluated collateral dependent loans	4,418
Construction and Development
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Individually evaluated collateral dependent loans	402
Construction and Development | Significant Other Unobservable Inputs (Level 3)
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Individually evaluated collateral dependent loans	402
Commercial Real Estate
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Individually evaluated collateral dependent loans	3,937
Commercial Real Estate | Significant Other Unobservable Inputs (Level 3)
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Individually evaluated collateral dependent loans	3,937
Commercial and Industrial
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Individually evaluated collateral dependent loans	79
Commercial and Industrial | Significant Other Unobservable Inputs (Level 3)
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Individually evaluated collateral dependent loans	$ 79