ALLOWANCE FOR LOAN AND LEASE LOSSES AND CREDIT QUALITY INFORMATION - Schedule of Loans Identified as Troubled Debt Restructurings During Periods Indicated (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total loans identified during the period	$ 1,332	$ 753	$ 4,164	$ 5,729
Residential
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total loans identified during the period	404	253	1,522	670
Consumer
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total loans identified during the period	928	500	1,321	1,807
Commercial and industrial | Commercial
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total loans identified during the period	0	0	16	1,335
Owner-occupied commercial | Commercial
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total loans identified during the period	0	0	1,206	1,413
Commercial mortgages | Commercial
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total loans identified during the period	0	0	99	504
Construction | Commercial
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total loans identified during the period	$ 0	$ 0	$ 0	$ 0