Loan and Lease Financings (Details 2) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Amortized cost of loans and leases, segregated by portfolio segment, with delinquency aging and nonaccrual status
90 Days or More Past Due and Accruing	$ 154	$ 54
Total Accruing Loans	6,337,031	5,984,742
Nonaccrual	16,617	26,420
Total loans and leases	6,353,648	6,011,162
Accrued interest receivable on loans and leases	22,810	18,750
Current
Amortized cost of loans and leases, segregated by portfolio segment, with delinquency aging and nonaccrual status
Total loans and leases	6,330,629	5,980,206
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	5,330	2,929
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	918	1,553
Commercial and agricultural
Amortized cost of loans and leases, segregated by portfolio segment, with delinquency aging and nonaccrual status
Total Accruing Loans	756,797	811,167
Nonaccrual	6,254	864
Total loans and leases	763,051	812,031
Commercial and agricultural | Current
Amortized cost of loans and leases, segregated by portfolio segment, with delinquency aging and nonaccrual status
Total loans and leases	756,225	810,223
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	572	944
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	0	0
Solar
Amortized cost of loans and leases, segregated by portfolio segment, with delinquency aging and nonaccrual status
Total Accruing Loans	364,949	381,163
Nonaccrual	0	0
Total loans and leases	364,949	381,163
Solar | Current
Amortized cost of loans and leases, segregated by portfolio segment, with delinquency aging and nonaccrual status
Total loans and leases	364,949	381,163
Solar | 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
Solar | 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	896,425	793,964
Nonaccrual	5,059	14,153
Total loans and leases	901,484	808,117
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	895,298	793,610
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	1,115	353
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	12	1
Medium and heavy duty truck
Amortized cost of loans and leases, segregated by portfolio segment, with delinquency aging and nonaccrual status
Total Accruing Loans	323,202	313,847
Nonaccrual	0	15
Total loans and leases	323,202	313,862
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	323,202	313,845
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	0
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	2
Aircraft
Amortized cost of loans and leases, segregated by portfolio segment, with delinquency aging and nonaccrual status
Total Accruing Loans	1,079,581	1,077,151
Nonaccrual	0	571
Total loans and leases	1,079,581	1,077,722
Aircraft | Current
Amortized cost of loans and leases, segregated by portfolio segment, with delinquency aging and nonaccrual status
Total loans and leases	1,079,135	1,075,865
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	0	223
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	446	1,063
Construction equipment
Amortized cost of loans and leases, segregated by portfolio segment, with delinquency aging and nonaccrual status
Total Accruing Loans	1,061,482	933,034
Nonaccrual	615	5,469
Total loans and leases	1,062,097	938,503
Construction equipment | Current
Amortized cost of loans and leases, segregated by portfolio segment, with delinquency aging and nonaccrual status
Total loans and leases	1,059,212	932,603
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	2,270	431
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	0
Commercial real estate
Amortized cost of loans and leases, segregated by portfolio segment, with delinquency aging and nonaccrual status
Total Accruing Loans	1,085,383	940,516
Nonaccrual	2,816	3,229
Total loans and leases	1,088,199	943,745
Commercial real estate | Current
Amortized cost of loans and leases, segregated by portfolio segment, with delinquency aging and nonaccrual status
Total loans and leases	1,085,383	940,516
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	0
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	111	49
Total Accruing Loans	625,990	582,952
Nonaccrual	1,525	1,785
Total loans and leases	627,515	584,737
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	624,675	582,053
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	811	562
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	393	288
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	43	5
Total Accruing Loans	143,222	150,948
Nonaccrual	348	334
Total loans and leases	143,570	151,282
Consumer | Current
Amortized cost of loans and leases, segregated by portfolio segment, with delinquency aging and nonaccrual status
Total loans and leases	142,550	150,328
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	562	416
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	$ 67	$ 199