Loans and Leases and the Allowance for Credit Losses - Schedule of Non-Accrual Loans and Leases (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Financing Receivable Nonaccrual Status [Line Items]
Non-accrual loans with a related ACL	$ 14,385	$ 16,022
Non-accrual loans without a related ACL	3,903	127
Total Non-accrual loans	18,288	16,149
Commercial
Financing Receivable Nonaccrual Status [Line Items]
Non-accrual loans with a related ACL	4,974	8,968
Non-accrual loans without a related ACL	3,544	0
Total Non-accrual loans	8,518	8,968
Commercial | Commercial and Industrial
Financing Receivable Nonaccrual Status [Line Items]
Non-accrual loans with a related ACL	209	441
Non-accrual loans without a related ACL	0	0
Total Non-accrual loans	209	441
Commercial | Commercial Mortgage
Financing Receivable Nonaccrual Status [Line Items]
Non-accrual loans with a related ACL	4,765	8,527
Non-accrual loans without a related ACL	3,544	0
Total Non-accrual loans	8,309	8,527
Consumer
Financing Receivable Nonaccrual Status [Line Items]
Non-accrual loans with a related ACL	9,411	7,054
Non-accrual loans without a related ACL	359	127
Total Non-accrual loans	9,770	7,181
Consumer | Residential Mortgage
Financing Receivable Nonaccrual Status [Line Items]
Non-accrual loans with a related ACL	3,989	3,096
Non-accrual loans without a related ACL	359	127
Total Non-accrual loans	4,348	3,223
Consumer | Home Equity
Financing Receivable Nonaccrual Status [Line Items]
Non-accrual loans with a related ACL	5,422	3,958
Non-accrual loans without a related ACL	0	0
Total Non-accrual loans	$ 5,422	$ 3,958