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Loan and Lease Financings (Details 5) $ in Thousands	12 Months Ended
	Dec. 31, 2020 USD ($) modification default	Dec. 31, 2019 USD ($) modification default	Dec. 31, 2018 USD ($) modification default
Loans and leases classified as TDR
Financing Receivable, Troubled Debt Restructuring	$ 11,486	$ 10,724
Financing Receivable, Modifications, Number of Contracts | modification	2	2	1
Financing Receivable, Troubled Debt Restructuring, Postmodification	$ 10,733	$ 10,366	$ 285
Financing Receivable, Troubled Debt Restructuring, Subsequent Default, Number of Contracts | default			0
Troubled debt restructured loans and leases which had payment defaults within twelve months following modification
Default threshold	90 days
Interest Rate Below Market Reduction
Loans and leases classified as TDR
Financing Receivable, Modifications, Number of Contracts	2	1	0
Performing
Loans and leases classified as TDR
Financing Receivable, Troubled Debt Restructuring	$ 330	$ 10,238
Financing Receivable, Modifications, Number of Contracts | modification	0	1	0
Financing Receivable, Troubled Debt Restructuring, Postmodification	$ 0	$ 9,901	$ 0
Nonperforming
Loans and leases classified as TDR
Financing Receivable, Troubled Debt Restructuring	$ 11,156	$ 486
Financing Receivable, Modifications, Number of Contracts | modification	2	1	1
Financing Receivable, Troubled Debt Restructuring, Postmodification	$ 10,733	$ 465	$ 285
Commercial and agricultural | Performing
Loans and leases classified as TDR
Financing Receivable, Modifications, Number of Contracts | modification	0	1	0
Financing Receivable, Troubled Debt Restructuring, Postmodification	$ 0	$ 9,901	$ 0
Commercial and agricultural | Nonperforming
Loans and leases classified as TDR
Financing Receivable, Modifications, Number of Contracts | modification	0	1	0
Financing Receivable, Troubled Debt Restructuring, Postmodification	$ 0	$ 465	$ 0
Financing Receivable, Troubled Debt Restructuring, Subsequent Default, Number of Contracts | default	1
Financing Receivable, Troubled Debt Restructuring, Subsequent Default	$ 410
Auto and light truck | Performing
Loans and leases classified as TDR
Financing Receivable, Modifications, Number of Contracts | modification	0	0	0
Financing Receivable, Troubled Debt Restructuring, Postmodification	$ 0	$ 0	$ 0
Auto and light truck | Nonperforming
Loans and leases classified as TDR
Financing Receivable, Modifications, Number of Contracts | modification	0	0	1
Financing Receivable, Troubled Debt Restructuring, Postmodification	$ 0	$ 0	$ 285
Financing Receivable, Troubled Debt Restructuring, Subsequent Default, Number of Contracts | default		1
Financing Receivable, Troubled Debt Restructuring, Subsequent Default		$ 0
Medium and heavy duty truck | Performing
Loans and leases classified as TDR
Financing Receivable, Modifications, Number of Contracts | modification	0	0	0
Financing Receivable, Troubled Debt Restructuring, Postmodification	$ 0	$ 0	$ 0
Medium and heavy duty truck | Nonperforming
Loans and leases classified as TDR
Financing Receivable, Modifications, Number of Contracts | modification	0	0	0
Financing Receivable, Troubled Debt Restructuring, Postmodification	$ 0	$ 0	$ 0
Aircraft | Performing
Loans and leases classified as TDR
Financing Receivable, Modifications, Number of Contracts | modification	0	0	0
Financing Receivable, Troubled Debt Restructuring, Postmodification	$ 0	$ 0	$ 0
Aircraft | Nonperforming
Loans and leases classified as TDR
Financing Receivable, Modifications, Number of Contracts | modification	1	0	0
Financing Receivable, Troubled Debt Restructuring, Postmodification	$ 828	$ 0	$ 0
Construction equipment | Performing
Loans and leases classified as TDR
Financing Receivable, Modifications, Number of Contracts | modification	0	0	0
Financing Receivable, Troubled Debt Restructuring, Postmodification	$ 0	$ 0	$ 0
Construction equipment | Nonperforming
Loans and leases classified as TDR
Financing Receivable, Modifications, Number of Contracts | modification	1	0	0
Financing Receivable, Troubled Debt Restructuring, Postmodification	$ 9,905	$ 0	$ 0
Commercial real estate | Performing
Loans and leases classified as TDR
Financing Receivable, Modifications, Number of Contracts | modification	0	0	0
Financing Receivable, Troubled Debt Restructuring, Postmodification	$ 0	$ 0	$ 0
Commercial real estate | Nonperforming
Loans and leases classified as TDR
Financing Receivable, Modifications, Number of Contracts | modification	0	0	0
Financing Receivable, Troubled Debt Restructuring, Postmodification	$ 0	$ 0	$ 0
Residential real estate and home equity | Performing
Loans and leases classified as TDR
Financing Receivable, Modifications, Number of Contracts | modification	0	0	0
Financing Receivable, Troubled Debt Restructuring, Postmodification	$ 0	$ 0	$ 0
Residential real estate and home equity | Nonperforming
Loans and leases classified as TDR
Financing Receivable, Modifications, Number of Contracts | modification	0	0	0
Financing Receivable, Troubled Debt Restructuring, Postmodification	$ 0	$ 0	$ 0
Consumer | Performing
Loans and leases classified as TDR
Financing Receivable, Modifications, Number of Contracts | modification	0	0	0
Financing Receivable, Troubled Debt Restructuring, Postmodification	$ 0	$ 0	$ 0
Consumer | Nonperforming
Loans and leases classified as TDR
Financing Receivable, Modifications, Number of Contracts | modification	0	0	0
Financing Receivable, Troubled Debt Restructuring, Postmodification	$ 0	$ 0	$ 0

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