ALLOWANCE FOR LOAN AND LEASE LOSSES AND CREDIT QUALITY INFORMATION - Schedule of Types of TDR (Details) - loan	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loan Modification Total	10	7
Commercial | Commercial and industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loan Modification Total	1	0
Commercial | Owner-occupied commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loan Modification Total	1	0
Commercial | Commercial mortgages
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loan Modification Total	1	1
Commercial | Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loan Modification Total	0	0
Residential
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loan Modification Total	2	2
Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loan Modification Total	5	4
Contractual payment reduction and term extension
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loan Modification Total	2	1
Contractual payment reduction and term extension | Commercial | Commercial and industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loan Modification Total	1	0
Contractual payment reduction and term extension | Commercial | Owner-occupied commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loan Modification Total	1	0
Contractual payment reduction and term extension | Commercial | Commercial mortgages
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loan Modification Total	0	1
Contractual payment reduction and term extension | Commercial | Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loan Modification Total	0	0
Contractual payment reduction and term extension | Residential
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loan Modification Total	0	0
Contractual payment reduction and term extension | Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loan Modification Total	0	0
Maturity Date Extension
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loan Modification Total	1	0
Maturity Date Extension | Commercial | Commercial and industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loan Modification Total	0	0
Maturity Date Extension | Commercial | Owner-occupied commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loan Modification Total	0	0
Maturity Date Extension | Commercial | Commercial mortgages
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loan Modification Total	1	0
Maturity Date Extension | Commercial | Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loan Modification Total	0	0
Maturity Date Extension | Residential
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loan Modification Total	0	0
Maturity Date Extension | Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loan Modification Total	0	0
Discharged in bankruptcy
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loan Modification Total	4	2
Discharged in bankruptcy | Commercial | Commercial and industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loan Modification Total	0	0
Discharged in bankruptcy | Commercial | Owner-occupied commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loan Modification Total	0	0
Discharged in bankruptcy | Commercial | Commercial mortgages
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loan Modification Total	0	0
Discharged in bankruptcy | Commercial | Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loan Modification Total	0	0
Discharged in bankruptcy | Residential
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loan Modification Total	1	1
Discharged in bankruptcy | Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loan Modification Total	3	1
Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loan Modification Total	3	4
Other | Commercial | Commercial and industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loan Modification Total	0	0
Other | Commercial | Owner-occupied commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loan Modification Total	0	0
Other | Commercial | Commercial mortgages
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loan Modification Total	0	0
Other | Commercial | Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loan Modification Total	0	0
Other | Residential
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loan Modification Total	1	1
Other | Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loan Modification Total	2	3