LOANS AND ALLOWANCE FOR CREDIT LOSSES - Summary of Troubled Debt Restructuring (Details) $ in Thousands	12 Months Ended
Dec. 31, 2020 USD ($) contract	Dec. 31, 2019 USD ($) contract
Financing Receivable, Modifications [Line Items]
Total	$ 9,716	$ 7,341
Specific reserves on TDRs	$ 0	$ 164
Troubled Debt Restructurings:
Number of Contracts \| contract	4	4
Pre-Modification Outstanding Recorded Investment	$ 2,435	$ 1,680
Post-Modification Outstanding Recorded Investment	$ 1,836	$ 1,515
Construction and development
Troubled Debt Restructurings:
Number of Contracts \| contract	2
Pre-Modification Outstanding Recorded Investment	$ 1,289
Post-Modification Outstanding Recorded Investment	$ 1,081
Commercial real estate
Troubled Debt Restructurings:
Number of Contracts \| contract	1	4
Pre-Modification Outstanding Recorded Investment	$ 1,017	$ 1,680
Post-Modification Outstanding Recorded Investment	$ 670	1,515
Commercial and industrial
Troubled Debt Restructurings:
Number of Contracts \| contract	1
Pre-Modification Outstanding Recorded Investment	$ 129
Post-Modification Outstanding Recorded Investment	85
Nonaccrual TDRs
Financing Receivable, Modifications [Line Items]
Total	90	101
Performing TDRs
Financing Receivable, Modifications [Line Items]
Total	$ 9,626	$ 7,240

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Amount, after troubled debt restructuring, of modified financing receivable.

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Amount of financing receivable modified as troubled debt restructuring.

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Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
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