Allowance for Credit Losses and Credit Quality - Summary of TDR Loans (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total TDR loans	$ 98,734	$ 45,620
Commercial Loan and Lease Portfolio
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total TDR loans	59,272	18,342
Consumer Loan Portfolio
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total TDR loans	39,462	27,278
Accruing TDR Loans
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total TDR loans	52,355	25,389
Accruing TDR Loans | Commercial Loan and Lease Portfolio
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total TDR loans	35,697	12,986
Accruing TDR Loans | Consumer Loan Portfolio
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total TDR loans	16,658	12,403
Nonaccrual TDR Loans
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total TDR loans	46,379	20,231
Nonaccrual TDR Loans | Commercial Loan and Lease Portfolio
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total TDR loans	23,575	5,356
Nonaccrual TDR Loans | Consumer Loan Portfolio
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total TDR loans	$ 22,804	$ 14,875