Loans and Leases and the Allowance for Credit Losses - Schedule of TDRs that Defaulted during Period, within Twelve Months of Modification Date (Details) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020 USD ($) contract	Sep. 30, 2019 USD ($) contract	Sep. 30, 2020 USD ($) contract	Sep. 30, 2019 USD ($) contract
Financing Receivable Modifications [Line Items]
Number of Contracts, TDRs that Defaulted | contract	1	20	39	49
Recorded Investment (as of period ended), TDRs that Defaulted | $	$ 6	$ 526	$ 629	$ 853
Commercial
Financing Receivable Modifications [Line Items]
Number of Contracts, TDRs that Defaulted | contract			0	1
Recorded Investment (as of period ended), TDRs that Defaulted | $			$ 0	$ 55
Commercial | Commercial and Industrial
Financing Receivable Modifications [Line Items]
Number of Contracts, TDRs that Defaulted | contract			0	1
Recorded Investment (as of period ended), TDRs that Defaulted | $			$ 0	$ 55
Consumer
Financing Receivable Modifications [Line Items]
Number of Contracts, TDRs that Defaulted | contract	1	20	39	48
Recorded Investment (as of period ended), TDRs that Defaulted | $	$ 6	$ 526	$ 629	$ 798
Consumer | Other
Financing Receivable Modifications [Line Items]
Number of Contracts, TDRs that Defaulted | contract	0	9	6	24
Recorded Investment (as of period ended), TDRs that Defaulted | $	$ 0	$ 72	$ 38	$ 144
Consumer | Residential Mortgage
Financing Receivable Modifications [Line Items]
Number of Contracts, TDRs that Defaulted | contract	0	1	0	1
Recorded Investment (as of period ended), TDRs that Defaulted | $	$ 0	$ 133	$ 0	$ 133
Consumer | Automobile
Financing Receivable Modifications [Line Items]
Number of Contracts, TDRs that Defaulted | contract	1	9	33	22
Recorded Investment (as of period ended), TDRs that Defaulted | $	$ 6	$ 126	$ 591	$ 326
Consumer | Home Equity
Financing Receivable Modifications [Line Items]
Number of Contracts, TDRs that Defaulted | contract	0	1	0	1
Recorded Investment (as of period ended), TDRs that Defaulted | $	$ 0	$ 195	$ 0	$ 195