Loans and Leases and Allowance for Credit Losses - Loans modified under terms of TDR (Details) - Loans receivable $ in Thousands	3 Months Ended
	Mar. 31, 2020 USD ($) contract	Mar. 31, 2019 USD ($) contract
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Contracts | contract	18	10
Pre-modification Outstanding Amortized Cost	$ 1,990	$ 587
Post-Modification Outstanding Amortized Cost by Type of Modification	$ 1,945	$ 577
Modified Within the Previous Twelve Months that Have Subsequently Defaulted, Number of Contracts | contract	2	0
Modified Within the Previous Twelve Months that Have Subsequently Defaulted, Amortized Cost	$ 9	$ 0
Rate Reduction
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-Modification Outstanding Amortized Cost by Type of Modification	0	0
Structure
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-Modification Outstanding Amortized Cost by Type of Modification	779	513
Other
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-Modification Outstanding Amortized Cost by Type of Modification	$ 1,166	$ 64
Indirect auto
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Contracts | contract		6
Pre-modification Outstanding Amortized Cost		$ 66
Post-Modification Outstanding Amortized Cost by Type of Modification		$ 57
Modified Within the Previous Twelve Months that Have Subsequently Defaulted, Number of Contracts | contract		0
Modified Within the Previous Twelve Months that Have Subsequently Defaulted, Amortized Cost		$ 0
Indirect auto | Rate Reduction
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-Modification Outstanding Amortized Cost by Type of Modification		0
Indirect auto | Structure
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-Modification Outstanding Amortized Cost by Type of Modification		0
Indirect auto | Other
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-Modification Outstanding Amortized Cost by Type of Modification		$ 57
Commercial
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Contracts | contract	11	2
Pre-modification Outstanding Amortized Cost	$ 1,677	$ 176
Post-Modification Outstanding Amortized Cost by Type of Modification	$ 1,656	$ 176
Modified Within the Previous Twelve Months that Have Subsequently Defaulted, Number of Contracts | contract	1	0
Modified Within the Previous Twelve Months that Have Subsequently Defaulted, Amortized Cost	$ 6	$ 0
Commercial | Rate Reduction
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-Modification Outstanding Amortized Cost by Type of Modification	0	0
Commercial | Structure
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-Modification Outstanding Amortized Cost by Type of Modification	501	169
Commercial | Other
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-Modification Outstanding Amortized Cost by Type of Modification	$ 1,155	$ 7
Commercial | Owner occupied commercial real estate
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Contracts | contract	1	0
Pre-modification Outstanding Amortized Cost	$ 1,008	$ 0
Post-Modification Outstanding Amortized Cost by Type of Modification	$ 990	$ 0
Modified Within the Previous Twelve Months that Have Subsequently Defaulted, Number of Contracts | contract	0	0
Modified Within the Previous Twelve Months that Have Subsequently Defaulted, Amortized Cost	$ 0	$ 0
Commercial | Owner occupied commercial real estate | Rate Reduction
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-Modification Outstanding Amortized Cost by Type of Modification	0	0
Commercial | Owner occupied commercial real estate | Structure
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-Modification Outstanding Amortized Cost by Type of Modification	0	0
Commercial | Owner occupied commercial real estate | Other
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-Modification Outstanding Amortized Cost by Type of Modification	$ 990	$ 0
Commercial | Income producing commercial real estate
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Contracts | contract	3	1
Pre-modification Outstanding Amortized Cost	$ 235	$ 169
Post-Modification Outstanding Amortized Cost by Type of Modification	$ 232	$ 169
Modified Within the Previous Twelve Months that Have Subsequently Defaulted, Number of Contracts | contract	0	0
Modified Within the Previous Twelve Months that Have Subsequently Defaulted, Amortized Cost	$ 0	$ 0
Commercial | Income producing commercial real estate | Rate Reduction
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-Modification Outstanding Amortized Cost by Type of Modification	0	0
Commercial | Income producing commercial real estate | Structure
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-Modification Outstanding Amortized Cost by Type of Modification	67	169
Commercial | Income producing commercial real estate | Other
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-Modification Outstanding Amortized Cost by Type of Modification	$ 165	$ 0
Commercial | Commercial & industrial
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Contracts | contract	0	1
Pre-modification Outstanding Amortized Cost	$ 0	$ 7
Post-Modification Outstanding Amortized Cost by Type of Modification	$ 0	$ 7
Modified Within the Previous Twelve Months that Have Subsequently Defaulted, Number of Contracts | contract	1	0
Modified Within the Previous Twelve Months that Have Subsequently Defaulted, Amortized Cost	$ 6	$ 0
Commercial | Commercial & industrial | Rate Reduction
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-Modification Outstanding Amortized Cost by Type of Modification	0	0
Commercial | Commercial & industrial | Structure
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-Modification Outstanding Amortized Cost by Type of Modification	0	0
Commercial | Commercial & industrial | Other
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-Modification Outstanding Amortized Cost by Type of Modification	$ 0	$ 7
Commercial | Construction
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Contracts | contract	0	0
Pre-modification Outstanding Amortized Cost	$ 0	$ 0
Post-Modification Outstanding Amortized Cost by Type of Modification	$ 0	$ 0
Modified Within the Previous Twelve Months that Have Subsequently Defaulted, Number of Contracts | contract	0	0
Modified Within the Previous Twelve Months that Have Subsequently Defaulted, Amortized Cost	$ 0	$ 0
Commercial | Construction | Rate Reduction
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-Modification Outstanding Amortized Cost by Type of Modification	0	0
Commercial | Construction | Structure
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-Modification Outstanding Amortized Cost by Type of Modification	0	0
Commercial | Construction | Other
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-Modification Outstanding Amortized Cost by Type of Modification	$ 0	$ 0
Commercial | Equipment financing
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Contracts | contract	7	0
Pre-modification Outstanding Amortized Cost	$ 434	$ 0
Post-Modification Outstanding Amortized Cost by Type of Modification	$ 434	$ 0
Modified Within the Previous Twelve Months that Have Subsequently Defaulted, Number of Contracts | contract	0	0
Modified Within the Previous Twelve Months that Have Subsequently Defaulted, Amortized Cost	$ 0	$ 0
Commercial | Equipment financing | Rate Reduction
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-Modification Outstanding Amortized Cost by Type of Modification	0	0
Commercial | Equipment financing | Structure
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-Modification Outstanding Amortized Cost by Type of Modification	434	0
Commercial | Equipment financing | Other
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-Modification Outstanding Amortized Cost by Type of Modification	$ 0	$ 0
Residential | Construction
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Contracts | contract	0	0
Pre-modification Outstanding Amortized Cost	$ 0	$ 0
Post-Modification Outstanding Amortized Cost by Type of Modification	$ 0	$ 0
Modified Within the Previous Twelve Months that Have Subsequently Defaulted, Number of Contracts | contract	0	0
Modified Within the Previous Twelve Months that Have Subsequently Defaulted, Amortized Cost	$ 0	$ 0
Residential | Construction | Rate Reduction
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-Modification Outstanding Amortized Cost by Type of Modification	0	0
Residential | Construction | Structure
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-Modification Outstanding Amortized Cost by Type of Modification	0	0
Residential | Construction | Other
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-Modification Outstanding Amortized Cost by Type of Modification	$ 0	$ 0
Residential | Residential mortgage
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Contracts | contract	5	2
Pre-modification Outstanding Amortized Cost	$ 302	$ 345
Post-Modification Outstanding Amortized Cost by Type of Modification	$ 278	$ 344
Modified Within the Previous Twelve Months that Have Subsequently Defaulted, Number of Contracts | contract	0	0
Modified Within the Previous Twelve Months that Have Subsequently Defaulted, Amortized Cost	$ 0	$ 0
Residential | Residential mortgage | Rate Reduction
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-Modification Outstanding Amortized Cost by Type of Modification	0	0
Residential | Residential mortgage | Structure
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-Modification Outstanding Amortized Cost by Type of Modification	278	344
Residential | Residential mortgage | Other
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-Modification Outstanding Amortized Cost by Type of Modification	$ 0	$ 0
Residential | Home equity lines of credit
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Contracts | contract	0	0
Pre-modification Outstanding Amortized Cost	$ 0	$ 0
Post-Modification Outstanding Amortized Cost by Type of Modification	$ 0	$ 0
Modified Within the Previous Twelve Months that Have Subsequently Defaulted, Number of Contracts | contract	0	0
Modified Within the Previous Twelve Months that Have Subsequently Defaulted, Amortized Cost	$ 0	$ 0
Residential | Home equity lines of credit | Rate Reduction
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-Modification Outstanding Amortized Cost by Type of Modification	0	0
Residential | Home equity lines of credit | Structure
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-Modification Outstanding Amortized Cost by Type of Modification	0	0
Residential | Home equity lines of credit | Other
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-Modification Outstanding Amortized Cost by Type of Modification	$ 0	$ 0
Consumer
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Contracts | contract	2	0
Pre-modification Outstanding Amortized Cost	$ 11	$ 0
Post-Modification Outstanding Amortized Cost by Type of Modification	$ 11	$ 0
Modified Within the Previous Twelve Months that Have Subsequently Defaulted, Number of Contracts | contract	1	0
Modified Within the Previous Twelve Months that Have Subsequently Defaulted, Amortized Cost	$ 3	$ 0
Consumer | Rate Reduction
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-Modification Outstanding Amortized Cost by Type of Modification	0	0
Consumer | Structure
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-Modification Outstanding Amortized Cost by Type of Modification	0	0
Consumer | Other
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-Modification Outstanding Amortized Cost by Type of Modification	$ 11	$ 0