ALLOWANCE FOR CREDIT LOSSES AND CREDIT QUALITY INFORMATION - Schedule of Types of TDR (Details) - loan	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loan modifications	6	21
Commercial | Commercial and industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loan modifications	1
Residential
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loan modifications	1	2
Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loan modifications	4	19
Contractual payment reduction and term extension
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loan modifications	3	0
Contractual payment reduction and term extension | Commercial | Commercial and industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loan modifications	1
Contractual payment reduction and term extension | Residential
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loan modifications	1	0
Contractual payment reduction and term extension | Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loan modifications	1	0
Maturity Date Extension
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loan modifications	0	0
Maturity Date Extension | Commercial | Commercial and industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loan modifications	0
Maturity Date Extension | Residential
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loan modifications	0	0
Maturity Date Extension | Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loan modifications	0	0
Discharged in bankruptcy
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loan modifications	2	21
Discharged in bankruptcy | Commercial | Commercial and industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loan modifications	0
Discharged in bankruptcy | Residential
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loan modifications	0	2
Discharged in bankruptcy | Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loan modifications	2	19
Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loan modifications	1	0
Other | Commercial | Commercial and industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loan modifications	0
Other | Residential
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loan modifications	0	0
Other | Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loan modifications	1	0