Allowance for Credit Losses and Credit Quality Information - Schedule of Loans Identified as Troubled Debt Restructurings During Periods Indicated (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Financing Receivable, Modifications [Line Items]
Total loans identified during the period	$ 4,396	$ 6,914
Residential
Financing Receivable, Modifications [Line Items]
Total loans identified during the period	1,396	1,231
Consumer
Financing Receivable, Modifications [Line Items]
Total loans identified during the period	1,714	2,046
Commercial and industrial(1) | Total Commercial
Financing Receivable, Modifications [Line Items]
Total loans identified during the period	1	1,134
Owner-occupied commercial | Total Commercial
Financing Receivable, Modifications [Line Items]
Total loans identified during the period	1,192	1,367
Commercial mortgages | Total Commercial
Financing Receivable, Modifications [Line Items]
Total loans identified during the period	93	1,136
Construction | Total Commercial
Financing Receivable, Modifications [Line Items]
Total loans identified during the period	$ 0	$ 0