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LOANS AND ALLOWANCE FOR CREDIT LOSSES - TDR, Recorded Investment and Number of Modifications (Details)	12 Months Ended
	Dec. 31, 2021 USD ($) loan	Dec. 31, 2020 USD ($) loan	Dec. 31, 2019 USD ($) loan
Accounts, Notes, Loans and Financing Receivable [Line Items]
Borrower's sustained repayment performance period	6 months
Number of Modifications	0	10	31
Pre-Modification Outstanding Recorded Investment		$ 404,000	$ 2,923,000
Post-Modification Outstanding Recorded Investment		601,000	2,630,000
Reserve		$ 24,000	$ 69,000
Number of modifications which subsequently defaulted | loan	0
Interest only payments and maturity concession
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of Modifications | loan			2
Post-Modification Outstanding Recorded Investment			$ 73,000
Interest rate, forbearance and maturity concession
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of Modifications | loan		4
Post-Modification Outstanding Recorded Investment		$ 384,000
Amortization and maturity concession
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of Modifications | loan			4
Post-Modification Outstanding Recorded Investment			$ 273,000
Amortization, interest rate and maturity concession
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of Modifications | loan			5
Post-Modification Outstanding Recorded Investment			$ 539,000
Forbearance
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of Modifications | loan			5
Post-Modification Outstanding Recorded Investment			$ 346,000
Forbearance and interest only payments
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of Modifications | loan		1	7
Post-Modification Outstanding Recorded Investment		$ 24,000	$ 692,000
Forbearance and maturity concession
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of Modifications | loan			4
Post-Modification Outstanding Recorded Investment			$ 472,000
Maturity concession
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of Modifications | loan		5
Post-Modification Outstanding Recorded Investment		$ 193,000
Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of Modifications | loan			4
Post-Modification Outstanding Recorded Investment			$ 235,000
Home equity
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of Modifications | loan		1
Pre-Modification Outstanding Recorded Investment		$ 26,000
Post-Modification Outstanding Recorded Investment		$ 24,000
Total commercial real estate | Commercial real estate non-owner occupied
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of Modifications | loan		1	10
Pre-Modification Outstanding Recorded Investment		$ 54,000	$ 630,000
Post-Modification Outstanding Recorded Investment		244,000	529,000
Reserve		$ 24,000	$ 69,000
Total commercial and industrial | Commercial and industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of Modifications | loan		7	9
Pre-Modification Outstanding Recorded Investment		$ 315,000	$ 866,000
Post-Modification Outstanding Recorded Investment		325,000	$ 774,000
Total residential real estate | Residential mortgages
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of Modifications | loan			12
Pre-Modification Outstanding Recorded Investment			$ 1,427,000
Post-Modification Outstanding Recorded Investment			$ 1,327,000
Residential mortgage loans collateralized by real estate property in the process of foreclosure	$ 574,000	$ 633,000
Total consumer | Other consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of Modifications | loan		1
Pre-Modification Outstanding Recorded Investment		$ 9,000
Post-Modification Outstanding Recorded Investment		$ 8,000

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Represents the reasonable period of a borrower's sustained repayment performance for consideration of returning the loan to performing status.

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