Loan and Lease Financings (Details 2) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Amortized cost of loans and leases, segregated by portfolio segment, with delinquency aging and nonaccrual status
90 Days or More Past Due and Accruing	$ 26	$ 149
Total Accruing Loans	6,540,675	6,495,124
Nonaccrual	22,097	23,381
Total loans and leases	6,562,772	6,518,505
Accrued interest receivable on loans and leases	26,010	25,350
Current
Amortized cost of loans and leases, segregated by portfolio segment, with delinquency aging and nonaccrual status
Total loans and leases	6,535,682	6,478,178
30 to 59 Days Past Due
Amortized cost of loans and leases, segregated by portfolio segment, with delinquency aging and nonaccrual status
Total loans and leases	4,646	12,705
60 to 89 Days Past Due
Amortized cost of loans and leases, segregated by portfolio segment, with delinquency aging and nonaccrual status
Total loans and leases	321	4,092
Commercial and agricultural
Amortized cost of loans and leases, segregated by portfolio segment, with delinquency aging and nonaccrual status
Total Accruing Loans	725,529	752,956
Nonaccrual	5,998	13,267
Total loans and leases	731,527	766,223
Commercial and agricultural | Current
Amortized cost of loans and leases, segregated by portfolio segment, with delinquency aging and nonaccrual status
Total loans and leases	725,177	752,947
Commercial and agricultural | 30 to 59 Days Past Due
Amortized cost of loans and leases, segregated by portfolio segment, with delinquency aging and nonaccrual status
Total loans and leases	237	9
Commercial and agricultural | 60 to 89 Days Past Due
Amortized cost of loans and leases, segregated by portfolio segment, with delinquency aging and nonaccrual status
Total loans and leases	115	0
Renewable energy
Amortized cost of loans and leases, segregated by portfolio segment, with delinquency aging and nonaccrual status
Total Accruing Loans	413,662	399,708
Nonaccrual	0	0
Total loans and leases	413,662	399,708
Renewable energy | Current
Amortized cost of loans and leases, segregated by portfolio segment, with delinquency aging and nonaccrual status
Total loans and leases	413,662	399,708
Renewable energy | 30 to 59 Days Past Due
Amortized cost of loans and leases, segregated by portfolio segment, with delinquency aging and nonaccrual status
Total loans and leases	0	0
Renewable energy | 60 to 89 Days Past Due
Amortized cost of loans and leases, segregated by portfolio segment, with delinquency aging and nonaccrual status
Total loans and leases	0	0
Auto and light truck
Amortized cost of loans and leases, segregated by portfolio segment, with delinquency aging and nonaccrual status
Total Accruing Loans	993,582	962,246
Nonaccrual	3,883	4,666
Total loans and leases	997,465	966,912
Auto and light truck | Current
Amortized cost of loans and leases, segregated by portfolio segment, with delinquency aging and nonaccrual status
Total loans and leases	993,324	962,226
Auto and light truck | 30 to 59 Days Past Due
Amortized cost of loans and leases, segregated by portfolio segment, with delinquency aging and nonaccrual status
Total loans and leases	258	20
Auto and light truck | 60 to 89 Days Past Due
Amortized cost of loans and leases, segregated by portfolio segment, with delinquency aging and nonaccrual status
Total loans and leases	0	0
Medium and heavy duty truck
Amortized cost of loans and leases, segregated by portfolio segment, with delinquency aging and nonaccrual status
Total Accruing Loans	303,799	311,947
Nonaccrual	0	0
Total loans and leases	303,799	311,947
Medium and heavy duty truck | Current
Amortized cost of loans and leases, segregated by portfolio segment, with delinquency aging and nonaccrual status
Total loans and leases	303,799	311,915
Medium and heavy duty truck | 30 to 59 Days Past Due
Amortized cost of loans and leases, segregated by portfolio segment, with delinquency aging and nonaccrual status
Total loans and leases	0	32
Medium and heavy duty truck | 60 to 89 Days Past Due
Amortized cost of loans and leases, segregated by portfolio segment, with delinquency aging and nonaccrual status
Total loans and leases	0	0
Aircraft
Amortized cost of loans and leases, segregated by portfolio segment, with delinquency aging and nonaccrual status
Total Accruing Loans	1,096,004	1,078,172
Nonaccrual	8,054	0
Total loans and leases	1,104,058	1,078,172
Aircraft | Current
Amortized cost of loans and leases, segregated by portfolio segment, with delinquency aging and nonaccrual status
Total loans and leases	1,095,832	1,069,830
Aircraft | 30 to 59 Days Past Due
Amortized cost of loans and leases, segregated by portfolio segment, with delinquency aging and nonaccrual status
Total loans and leases	168	8,113
Aircraft | 60 to 89 Days Past Due
Amortized cost of loans and leases, segregated by portfolio segment, with delinquency aging and nonaccrual status
Total loans and leases	4	229
Construction equipment
Amortized cost of loans and leases, segregated by portfolio segment, with delinquency aging and nonaccrual status
Total Accruing Loans	1,091,850	1,084,576
Nonaccrual	735	176
Total loans and leases	1,092,585	1,084,752
Construction equipment | Current
Amortized cost of loans and leases, segregated by portfolio segment, with delinquency aging and nonaccrual status
Total loans and leases	1,090,144	1,078,912
Construction equipment | 30 to 59 Days Past Due
Amortized cost of loans and leases, segregated by portfolio segment, with delinquency aging and nonaccrual status
Total loans and leases	1,706	2,044
Construction equipment | 60 to 89 Days Past Due
Amortized cost of loans and leases, segregated by portfolio segment, with delinquency aging and nonaccrual status
Total loans and leases	0	3,620
Commercial real estate
Amortized cost of loans and leases, segregated by portfolio segment, with delinquency aging and nonaccrual status
Total Accruing Loans	1,134,381	1,126,891
Nonaccrual	1,214	2,970
Total loans and leases	1,135,595	1,129,861
Commercial real estate | Current
Amortized cost of loans and leases, segregated by portfolio segment, with delinquency aging and nonaccrual status
Total loans and leases	1,134,381	1,126,806
Commercial real estate | 30 to 59 Days Past Due
Amortized cost of loans and leases, segregated by portfolio segment, with delinquency aging and nonaccrual status
Total loans and leases	0	0
Commercial real estate | 60 to 89 Days Past Due
Amortized cost of loans and leases, segregated by portfolio segment, with delinquency aging and nonaccrual status
Total loans and leases	0	85
Residential real estate and home equity
Amortized cost of loans and leases, segregated by portfolio segment, with delinquency aging and nonaccrual status
90 Days or More Past Due and Accruing	25	142
Total Accruing Loans	642,303	636,161
Nonaccrual	1,553	1,812
Total loans and leases	643,856	637,973
Residential real estate and home equity | Current
Amortized cost of loans and leases, segregated by portfolio segment, with delinquency aging and nonaccrual status
Total loans and leases	640,581	634,345
Residential real estate and home equity | 30 to 59 Days Past Due
Amortized cost of loans and leases, segregated by portfolio segment, with delinquency aging and nonaccrual status
Total loans and leases	1,533	1,623
Residential real estate and home equity | 60 to 89 Days Past Due
Amortized cost of loans and leases, segregated by portfolio segment, with delinquency aging and nonaccrual status
Total loans and leases	164	51
Consumer
Amortized cost of loans and leases, segregated by portfolio segment, with delinquency aging and nonaccrual status
90 Days or More Past Due and Accruing	1	7
Total Accruing Loans	139,565	142,467
Nonaccrual	660	490
Total loans and leases	140,225	142,957
Consumer | Current
Amortized cost of loans and leases, segregated by portfolio segment, with delinquency aging and nonaccrual status
Total loans and leases	138,782	141,489
Consumer | 30 to 59 Days Past Due
Amortized cost of loans and leases, segregated by portfolio segment, with delinquency aging and nonaccrual status
Total loans and leases	744	864
Consumer | 60 to 89 Days Past Due
Amortized cost of loans and leases, segregated by portfolio segment, with delinquency aging and nonaccrual status
Total loans and leases	$ 38	$ 107