LOANS AND ALLOWANCE FOR LOAN LOSSES - Types of loan modifications (Details)	12 Months Ended
	Dec. 31, 2021 USD ($)	Dec. 31, 2021 loan	Dec. 31, 2020 USD ($)	Dec. 31, 2020 loan
Financing Receivable, Modifications, Number of Contracts	4	4	8	8
Term Modification
Financing Receivable, Modifications, Number of Contracts	2	2	2	2
Payment Modification
Financing Receivable, Modifications, Number of Contracts	2	2	6	6
Commercial and Industrial [Member]
Financing Receivable, Modifications, Number of Contracts				2
Commercial and Industrial [Member] | Term Modification
Financing Receivable, Modifications, Number of Contracts				1
Commercial and Industrial [Member] | Payment Modification
Financing Receivable, Modifications, Number of Contracts				1
Commercial Real Estate
Financing Receivable, Modifications, Number of Contracts		4		6
Commercial Real Estate | Term Modification
Financing Receivable, Modifications, Number of Contracts		2		1
Commercial Real Estate | Payment Modification
Financing Receivable, Modifications, Number of Contracts		2		5