Allowance for Credit Losses and Credit Quality - Summary of TDR Loans (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total TDR loans	$ 57,320	$ 45,620
Commercial
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total TDR loans	24,337	18,342
Consumer
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total TDR loans	32,983	27,278
Accruing TDR Loans
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total TDR loans	28,214	25,389
Accruing TDR Loans | Commercial
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total TDR loans	13,707	12,986
Accruing TDR Loans | Consumer
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total TDR loans	14,507	12,403
Nonaccrual TDR Loans
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total TDR loans	29,106	20,231
Nonaccrual TDR Loans | Commercial
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total TDR loans	10,630	5,356
Nonaccrual TDR Loans | Consumer
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total TDR loans	$ 18,476	$ 14,875