ALLOWANCE FOR LOAN AND LEASE LOSSES AND CREDIT QUALITY INFORMATION - Schedule of Types of TDR (Details) - loan	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loan Modification Total	11	13	21	20
Commercial | Commercial and industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loan Modification Total	0	3	1	3
Commercial | Owner-occupied commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loan Modification Total	2	2	3	2
Commercial | Commercial mortgages
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loan Modification Total	0	1	1	2
Commercial | Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loan Modification Total	0	0	0	0
Residential
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loan Modification Total	4	3	6	5
Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loan Modification Total	5	4	10	8
Contractual payment reduction and term extension
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loan Modification Total	2	6	4	11
Contractual payment reduction and term extension | Commercial | Commercial and industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loan Modification Total	0	0	1	0
Contractual payment reduction and term extension | Commercial | Owner-occupied commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loan Modification Total	2	0	3	0
Contractual payment reduction and term extension | Commercial | Commercial mortgages
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loan Modification Total	0	0	0	1
Contractual payment reduction and term extension | Commercial | Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loan Modification Total	0	0	0	0
Contractual payment reduction and term extension | Residential
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loan Modification Total	0	3	0	4
Contractual payment reduction and term extension | Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loan Modification Total	0	3	0	6
Maturity Date Extension
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loan Modification Total	0	2	1	2
Maturity Date Extension | Commercial | Commercial and industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loan Modification Total	0	1	0	1
Maturity Date Extension | Commercial | Owner-occupied commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loan Modification Total	0	0	0	0
Maturity Date Extension | Commercial | Commercial mortgages
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loan Modification Total	0	0	1	0
Maturity Date Extension | Commercial | Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loan Modification Total	0	0	0	0
Maturity Date Extension | Residential
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loan Modification Total	0	0	0	0
Maturity Date Extension | Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loan Modification Total	0	1	0	1
Discharged in bankruptcy
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loan Modification Total	7	0	11	2
Discharged in bankruptcy | Commercial | Commercial and industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loan Modification Total	0	0	0	0
Discharged in bankruptcy | Commercial | Owner-occupied commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loan Modification Total	0	0	0	0
Discharged in bankruptcy | Commercial | Commercial mortgages
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loan Modification Total	0	0	0	0
Discharged in bankruptcy | Commercial | Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loan Modification Total	0	0	0	0
Discharged in bankruptcy | Residential
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loan Modification Total	3	0	4	1
Discharged in bankruptcy | Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loan Modification Total	4	0	7	1
Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loan Modification Total	2	5	5	5
Other | Commercial | Commercial and industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loan Modification Total	0	2	0	2
Other | Commercial | Owner-occupied commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loan Modification Total	0	2	0	2
Other | Commercial | Commercial mortgages
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loan Modification Total	0	1	0	1
Other | Commercial | Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loan Modification Total	0	0	0	0
Other | Residential
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loan Modification Total	1	0	2	0
Other | Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loan Modification Total	1	0	3	0