Loans and Leases and the Allowance for Loan and Lease Losses (Troubled Debt Restructuring & Narrative) (Details 6) $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2019 USD ($) contract	Sep. 30, 2018 USD ($) contract	Sep. 30, 2019 USD ($) contract	Sep. 30, 2018 USD ($) contract	Dec. 31, 2018 USD ($)
Information related to loans modified as a TDR
Recorded Investment	$ 54,000		$ 54,000
Available Commitments to Lend Additional Funds on Loans Modified as TDR			$ 100		$ 200
Number of Contracts | contract	101	141	355	444
Recorded Investment (as of period end)	$ 1,827	$ 2,989	$ 9,783	$ 9,548
Increase in Allowance (as of period end)	$ 26	$ 116	$ 95	$ 285
Residential Mortgage | Maximum
Information related to loans modified as a TDR
Period of Time Loan Being Fully Amortized			40 years
Land Loan | Maximum
Information related to loans modified as a TDR
Period of Time Loan Being Fully Amortized			360 months
Extending Balloon Payments			5 years
Commercial
Information related to loans modified as a TDR
Number of Contracts | contract	1	1	6	8
Recorded Investment (as of period end)	$ 45	$ 233	$ 4,010	$ 1,450
Increase in Allowance (as of period end)	$ 0	$ 0	$ 14	$ 47
Commercial | Commercial and Industrial
Information related to loans modified as a TDR
Number of Contracts | contract	1	1	5	8
Recorded Investment (as of period end)	$ 45	$ 233	$ 244	$ 1,450
Increase in Allowance (as of period end)	$ 0	$ 0	$ 14	$ 47
Commercial | Commercial Mortgage
Information related to loans modified as a TDR
Number of Contracts | contract			1	0
Recorded Investment (as of period end)			$ 3,766	$ 0
Increase in Allowance (as of period end)			$ 0	$ 0
Consumer
Information related to loans modified as a TDR
Number of Contracts | contract	100	140	349	436
Recorded Investment (as of period end)	$ 1,782	$ 2,756	$ 5,773	$ 8,098
Increase in Allowance (as of period end)	$ 26	$ 116	$ 81	$ 238
Consumer | Residential Mortgage
Information related to loans modified as a TDR
Number of Contracts | contract	0	2	1	4
Recorded Investment (as of period end)	$ 0	$ 296	$ 57	$ 749
Increase in Allowance (as of period end)	$ 0	$ 5	$ 0	$ 35
Consumer | Home Equity
Information related to loans modified as a TDR
Number of Contracts | contract	0	2	2	5
Recorded Investment (as of period end)	$ 0	$ 434	$ 246	$ 971
Increase in Allowance (as of period end)	$ 0	$ 69	$ 0	$ 69
Consumer | Automobile
Information related to loans modified as a TDR
Number of Contracts | contract	86	87	271	254
Recorded Investment (as of period end)	$ 1,665	$ 1,700	$ 5,011	$ 5,196
Increase in Allowance (as of period end)	$ 23	$ 33	$ 69	$ 100
Consumer | Other
Information related to loans modified as a TDR
Number of Contracts | contract	14	49	75	173
Recorded Investment (as of period end)	$ 117	$ 326	$ 459	$ 1,182
Increase in Allowance (as of period end)	$ 3	$ 9	$ 12	$ 34