Allowance for Loan and Lease Losses and Credit Quality - Summary of Defaulted TDR Loans (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Financing Receivable, Troubled Debt Restructuring [Line Items]
Defaulted TDR loan balance modified during the period	$ 4,237	$ 9,949	$ 5,384
Commercial
Financing Receivable, Troubled Debt Restructuring [Line Items]
Defaulted TDR loan balance modified during the period	956	4,697	555
Commercial | Commercial and industrial
Financing Receivable, Troubled Debt Restructuring [Line Items]
Defaulted TDR loan balance modified during the period	956	4,697	555
Consumer Loan Portfolio
Financing Receivable, Troubled Debt Restructuring [Line Items]
Defaulted TDR loan balance modified during the period	3,281	5,252	4,829
Consumer Loan Portfolio | Residential mortgage
Financing Receivable, Troubled Debt Restructuring [Line Items]
Defaulted TDR loan balance modified during the period	1,325	3,258	2,819
Consumer Loan Portfolio | Consumer installment
Financing Receivable, Troubled Debt Restructuring [Line Items]
Defaulted TDR loan balance modified during the period	1,555	1,436	1,169
Consumer Loan Portfolio | Home equity
Financing Receivable, Troubled Debt Restructuring [Line Items]
Defaulted TDR loan balance modified during the period	$ 401	$ 558	$ 841