Loan and Lease Financings (Details 3) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Amortized cost of loans and leases, segregated by class, with delinquency aging and nonaccrual status
90 Days or More Past Due and Accruing	$ 149	$ 54
Total Accruing Loans	6,495,124	5,984,742
Nonaccrual	23,381	26,420
Total loans and leases	6,518,505	6,011,162
Increase in interest income	1,470	2,680	$ 2,620
Current
Amortized cost of loans and leases, segregated by class, with delinquency aging and nonaccrual status
Total loans and leases	6,478,178	5,980,206
30 to 59 Days Past Due
Amortized cost of loans and leases, segregated by class, with delinquency aging and nonaccrual status
Total loans and leases	12,705	2,929
60 to 89 Days Past Due
Amortized cost of loans and leases, segregated by class, with delinquency aging and nonaccrual status
Total loans and leases	4,092	1,553
Commercial and agricultural
Amortized cost of loans and leases, segregated by class, with delinquency aging and nonaccrual status
Total Accruing Loans	752,956	811,167
Nonaccrual	13,267	864
Total loans and leases	766,223	812,031
Commercial and agricultural | Current
Amortized cost of loans and leases, segregated by class, with delinquency aging and nonaccrual status
Total loans and leases	752,947	810,223
Commercial and agricultural | 30 to 59 Days Past Due
Amortized cost of loans and leases, segregated by class, with delinquency aging and nonaccrual status
Total loans and leases	9	944
Commercial and agricultural | 60 to 89 Days Past Due
Amortized cost of loans and leases, segregated by class, with delinquency aging and nonaccrual status
Total loans and leases	0	0
Renewable energy
Amortized cost of loans and leases, segregated by class, with delinquency aging and nonaccrual status
Total Accruing Loans	399,708	381,163
Nonaccrual	0	0
Total loans and leases	399,708	381,163
Renewable energy | Current
Amortized cost of loans and leases, segregated by class, with delinquency aging and nonaccrual status
Total loans and leases	399,708	381,163
Renewable energy | 30 to 59 Days Past Due
Amortized cost of loans and leases, segregated by class, 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 class, with delinquency aging and nonaccrual status
Total loans and leases	0	0
Auto and light truck
Amortized cost of loans and leases, segregated by class, with delinquency aging and nonaccrual status
Total Accruing Loans	962,246	793,964
Nonaccrual	4,666	14,153
Total loans and leases	966,912	808,117
Auto and light truck | Current
Amortized cost of loans and leases, segregated by class, with delinquency aging and nonaccrual status
Total loans and leases	962,226	793,610
Auto and light truck | 30 to 59 Days Past Due
Amortized cost of loans and leases, segregated by class, with delinquency aging and nonaccrual status
Total loans and leases	20	353
Auto and light truck | 60 to 89 Days Past Due
Amortized cost of loans and leases, segregated by class, with delinquency aging and nonaccrual status
Total loans and leases	0	1
Medium and heavy duty truck
Amortized cost of loans and leases, segregated by class, with delinquency aging and nonaccrual status
Total Accruing Loans	311,947	313,847
Nonaccrual	0	15
Total loans and leases	311,947	313,862
Medium and heavy duty truck | Current
Amortized cost of loans and leases, segregated by class, with delinquency aging and nonaccrual status
Total loans and leases	311,915	313,845
Medium and heavy duty truck | 30 to 59 Days Past Due
Amortized cost of loans and leases, segregated by class, with delinquency aging and nonaccrual status
Total loans and leases	32	0
Medium and heavy duty truck | 60 to 89 Days Past Due
Amortized cost of loans and leases, segregated by class, with delinquency aging and nonaccrual status
Total loans and leases	0	2
Aircraft
Amortized cost of loans and leases, segregated by class, with delinquency aging and nonaccrual status
Total Accruing Loans	1,078,172	1,077,151
Nonaccrual	0	571
Total loans and leases	1,078,172	1,077,722
Aircraft | Current
Amortized cost of loans and leases, segregated by class, with delinquency aging and nonaccrual status
Total loans and leases	1,069,830	1,075,865
Aircraft | 30 to 59 Days Past Due
Amortized cost of loans and leases, segregated by class, with delinquency aging and nonaccrual status
Total loans and leases	8,113	223
Aircraft | 60 to 89 Days Past Due
Amortized cost of loans and leases, segregated by class, with delinquency aging and nonaccrual status
Total loans and leases	229	1,063
Construction equipment
Amortized cost of loans and leases, segregated by class, with delinquency aging and nonaccrual status
Total Accruing Loans	1,084,576	933,034
Nonaccrual	176	5,469
Total loans and leases	1,084,752	938,503
Construction equipment | Current
Amortized cost of loans and leases, segregated by class, with delinquency aging and nonaccrual status
Total loans and leases	1,078,912	932,603
Construction equipment | 30 to 59 Days Past Due
Amortized cost of loans and leases, segregated by class, with delinquency aging and nonaccrual status
Total loans and leases	2,044	431
Construction equipment | 60 to 89 Days Past Due
Amortized cost of loans and leases, segregated by class, with delinquency aging and nonaccrual status
Total loans and leases	3,620	0
Commercial real estate
Amortized cost of loans and leases, segregated by class, with delinquency aging and nonaccrual status
Total Accruing Loans	1,126,891	940,516
Nonaccrual	2,970	3,229
Total loans and leases	1,129,861	943,745
Commercial real estate | Current
Amortized cost of loans and leases, segregated by class, with delinquency aging and nonaccrual status
Total loans and leases	1,126,806	940,516
Commercial real estate | 30 to 59 Days Past Due
Amortized cost of loans and leases, segregated by class, 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 class, with delinquency aging and nonaccrual status
Total loans and leases	85	0
Residential real estate and home equity
Amortized cost of loans and leases, segregated by class, with delinquency aging and nonaccrual status
90 Days or More Past Due and Accruing	142	49
Total Accruing Loans	636,161	582,952
Nonaccrual	1,812	1,785
Total loans and leases	637,973	584,737
Residential real estate and home equity | Current
Amortized cost of loans and leases, segregated by class, with delinquency aging and nonaccrual status
Total loans and leases	634,345	582,053
Residential real estate and home equity | 30 to 59 Days Past Due
Amortized cost of loans and leases, segregated by class, with delinquency aging and nonaccrual status
Total loans and leases	1,623	562
Residential real estate and home equity | 60 to 89 Days Past Due
Amortized cost of loans and leases, segregated by class, with delinquency aging and nonaccrual status
Total loans and leases	51	288
Consumer
Amortized cost of loans and leases, segregated by class, with delinquency aging and nonaccrual status
90 Days or More Past Due and Accruing	7	5
Total Accruing Loans	142,467	150,948
Nonaccrual	490	334
Total loans and leases	142,957	151,282
Consumer | Current
Amortized cost of loans and leases, segregated by class, with delinquency aging and nonaccrual status
Total loans and leases	141,489	150,328
Consumer | 30 to 59 Days Past Due
Amortized cost of loans and leases, segregated by class, with delinquency aging and nonaccrual status
Total loans and leases	864	416
Consumer | 60 to 89 Days Past Due
Amortized cost of loans and leases, segregated by class, with delinquency aging and nonaccrual status
Total loans and leases	$ 107	$ 199