Loans and Leases and the Allowance for Credit Losses - Schedule of Non-Accrual Loans and Leases (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Financing Receivable Nonaccrual Status [Line Items]
Non-accrual loans with a related ACL	$ 15,426	$ 16,022
Non-accrual loans without a related ACL	125	127
Total Non-accrual loans	15,551	16,149
Commercial
Financing Receivable Nonaccrual Status [Line Items]
Non-accrual loans with a related ACL	8,796	8,968
Non-accrual loans without a related ACL	0	0
Total Non-accrual loans	8,796	8,968
Commercial | Commercial and Industrial
Financing Receivable Nonaccrual Status [Line Items]
Non-accrual loans with a related ACL	293	441
Non-accrual loans without a related ACL	0	0
Total Non-accrual loans	293	441
Commercial | Commercial Mortgage
Financing Receivable Nonaccrual Status [Line Items]
Non-accrual loans with a related ACL	8,503	8,527
Non-accrual loans without a related ACL	0	0
Total Non-accrual loans	8,503	8,527
Consumer
Financing Receivable Nonaccrual Status [Line Items]
Non-accrual loans with a related ACL	6,630	7,054
Non-accrual loans without a related ACL	125	127
Total Non-accrual loans	6,755	7,181
Consumer | Residential Mortgage
Financing Receivable Nonaccrual Status [Line Items]
Non-accrual loans with a related ACL	1,679	3,096
Non-accrual loans without a related ACL	125	127
Total Non-accrual loans	1,804	3,223
Consumer | Home Equity
Financing Receivable Nonaccrual Status [Line Items]
Non-accrual loans with a related ACL	4,951	3,958
Non-accrual loans without a related ACL	0	0
Total Non-accrual loans	$ 4,951	$ 3,958