Loan and Lease Financings (Details 6) $ in Thousands	12 Months Ended
	Dec. 31, 2015 USD ($) default modification	Dec. 31, 2014 USD ($) default modification	Dec. 31, 2013 USD ($) default modification
Loans and leases classified as TDR
Financing Receivable, Modifications, Number of Contracts | modification	2	9	4
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 218	$ 8,723	$ 5,446
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | default	0	1	2
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	$ 0	$ 255	$ 750
Financing Receivable, Modifications, Recorded Investment	$ 9,363	$ 23,625
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	0	3	2
Performing
Loans and leases classified as TDR
Financing Receivable, Modifications, Number of Contracts | modification	2	4	2
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 218	$ 610	$ 1,131
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | default	0	0	1
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	$ 0	$ 0	$ 750
Financing Receivable, Modifications, Recorded Investment	$ 7,437	$ 9,118
Nonperforming
Loans and leases classified as TDR
Financing Receivable, Modifications, Number of Contracts | modification	0	5	2
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 0	$ 8,113	$ 4,315
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | default	0	1	1
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	$ 0	$ 255	$ 0
Financing Receivable, Modifications, Recorded Investment	$ 1,926	$ 14,507
Commercial and agricultural | Performing
Loans and leases classified as TDR
Financing Receivable, Modifications, Number of Contracts | modification	2	2	1
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 218	$ 273	$ 750
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | default	0	0	1
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	$ 0	$ 0	$ 750
Commercial and agricultural | Nonperforming
Loans and leases classified as TDR
Financing Receivable, Modifications, Number of Contracts | modification	0	4	1
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 0	$ 7,315	$ 158
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | default	0	1	0
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	$ 0	$ 255	$ 0
Auto and light truck | Performing
Loans and leases classified as TDR
Financing Receivable, Modifications, Number of Contracts | modification	0	0	0
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 0	$ 0	$ 0
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | default	0	0	0
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	$ 0	$ 0	$ 0
Auto and light truck | Nonperforming
Loans and leases classified as TDR
Financing Receivable, Modifications, Number of Contracts | modification	0	0	0
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 0	$ 0	$ 0
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | default	0	0	0
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	$ 0	$ 0	$ 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, Modifications, Post-Modification Recorded Investment	$ 0	$ 0	$ 0
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | default	0	0	0
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	$ 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, Modifications, Post-Modification Recorded Investment	$ 0	$ 0	$ 0
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | default	0	0	0
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	$ 0	$ 0	$ 0
Aircraft financing | Performing
Loans and leases classified as TDR
Financing Receivable, Modifications, Number of Contracts | modification	0	2	0
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 0	$ 337	$ 0
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | default	0	0	0
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	$ 0	$ 0	$ 0
Aircraft financing | Nonperforming
Loans and leases classified as TDR
Financing Receivable, Modifications, Number of Contracts | modification	0	0	1
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 0	$ 0	$ 4,157
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | default	0	0	0
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	$ 0	$ 0	$ 0
Construction equipment financing | Performing
Loans and leases classified as TDR
Financing Receivable, Modifications, Number of Contracts | modification	0	0	0
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 0	$ 0	$ 0
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | default	0	0	0
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	$ 0	$ 0	$ 0
Construction equipment financing | Nonperforming
Loans and leases classified as TDR
Financing Receivable, Modifications, Number of Contracts | modification	0	0	0
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 0	$ 0	$ 0
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | default	0	0	0
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	$ 0	$ 0	$ 0
Commercial real estate | Performing
Loans and leases classified as TDR
Financing Receivable, Modifications, Number of Contracts | modification	0	0	0
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 0	$ 0	$ 0
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | default	0	0	0
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	$ 0	$ 0	$ 0
Commercial real estate | Nonperforming
Loans and leases classified as TDR
Financing Receivable, Modifications, Number of Contracts | modification	0	1	0
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 0	$ 798	$ 0
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | default	0	0	1
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	$ 0	$ 0	$ 0
Residential real estate | Performing
Loans and leases classified as TDR
Financing Receivable, Modifications, Number of Contracts | modification	0	0	1
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 0	$ 0	$ 381
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | default	0	0	0
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	$ 0	$ 0	$ 0
Residential real estate | Nonperforming
Loans and leases classified as TDR
Financing Receivable, Modifications, Number of Contracts | modification	0	0	0
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 0	$ 0	$ 0
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | default	0	0	0
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	$ 0	$ 0	$ 0
Consumer | Performing
Loans and leases classified as TDR
Financing Receivable, Modifications, Number of Contracts | modification	0	0	0
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 0	$ 0	$ 0
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | default	0	0	0
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	$ 0	$ 0	$ 0
Consumer | Nonperforming
Loans and leases classified as TDR
Financing Receivable, Modifications, Number of Contracts | modification	0	0	0
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 0	$ 0	$ 0
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | default	0	0	0
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	$ 0	$ 0	$ 0