Loans and Leases and the Allowance for Credit Losses - Schedule of Aging Analysis by Class of Loan and Lease Portfolio (Details) - USD ($) $ in Thousands	Jun. 30, 2024	Dec. 31, 2023
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Days Past Due	$ 13,831,266	$ 13,965,026
Non-Accrual	12,507	9,649
Total Past Due and Non-Accrual	52,845	52,254
Non-Accrual Loans and Leases that are Current	3,446	4,888
Commercial
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Days Past Due	5,815,537	5,777,486
Non-Accrual	6,282	2,923
Total Past Due and Non-Accrual	10,738	10,185
Non-Accrual Loans and Leases that are Current	2,611	2,920
Commercial | Commercial and Industrial
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Days Past Due	1,691,441	1,652,699
Non-Accrual	3,681	39
Total Past Due and Non-Accrual	7,907	7,301
Non-Accrual Loans and Leases that are Current	10	36
Commercial | Paycheck Protection Program
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Days Past Due	7,997	11,369
Non-Accrual	0	0
Total Past Due and Non-Accrual	0	0
Non-Accrual Loans and Leases that are Current	0	0
Commercial | Commercial Mortgage
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Days Past Due	3,741,140	3,749,016
Non-Accrual	2,601	2,884
Total Past Due and Non-Accrual	2,831	2,884
Non-Accrual Loans and Leases that are Current	2,601	2,884
Commercial | Construction
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Days Past Due	315,571	304,463
Non-Accrual	0	0
Total Past Due and Non-Accrual	0	0
Non-Accrual Loans and Leases that are Current	0	0
Commercial | Lease Financing
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Days Past Due	59,388	59,939
Non-Accrual	0	0
Total Past Due and Non-Accrual	0	0
Non-Accrual Loans and Leases that are Current	0	0
Consumer
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Days Past Due	8,015,729	8,187,540
Non-Accrual	6,225	6,726
Total Past Due and Non-Accrual	42,107	42,069
Non-Accrual Loans and Leases that are Current	835	1,968
Consumer | Residential Mortgage
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Days Past Due	4,595,586	4,684,171
Non-Accrual	2,998	2,935
Total Past Due and Non-Accrual	11,870	11,613
Non-Accrual Loans and Leases that are Current	0	867
Consumer | Home Equity
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Days Past Due	2,221,073	2,264,827
Non-Accrual	3,227	3,791
Total Past Due and Non-Accrual	13,031	11,702
Non-Accrual Loans and Leases that are Current	835	1,101
Consumer | Automobile
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Days Past Due	806,240	837,830
Non-Accrual	0	0
Total Past Due and Non-Accrual	13,456	15,119
Non-Accrual Loans and Leases that are Current	0	0
Consumer | Other
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Days Past Due	392,830	400,712
Non-Accrual	0	0
Total Past Due and Non-Accrual	3,750	3,635
Non-Accrual Loans and Leases that are Current	0	0
30 - 59 Days Past Due
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Days Past Due	22,282	30,715
30 - 59 Days Past Due | Commercial
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Days Past Due	1,068	6,748
30 - 59 Days Past Due | Commercial | Commercial and Industrial
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Days Past Due	838	6,748
30 - 59 Days Past Due | Commercial | Paycheck Protection Program
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Days Past Due	0	0
30 - 59 Days Past Due | Commercial | Commercial Mortgage
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Days Past Due	230	0
30 - 59 Days Past Due | Commercial | Construction
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Days Past Due	0	0
30 - 59 Days Past Due | Commercial | Lease Financing
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Days Past Due	0	0
30 - 59 Days Past Due | Consumer
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Days Past Due	21,214	23,967
30 - 59 Days Past Due | Consumer | Residential Mortgage
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Days Past Due	2,760	4,547
30 - 59 Days Past Due | Consumer | Home Equity
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Days Past Due	4,785	4,210
30 - 59 Days Past Due | Consumer | Automobile
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Days Past Due	11,674	13,242
30 - 59 Days Past Due | Consumer | Other
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Days Past Due	1,995	1,968
60 - 89 Days Past Due
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Days Past Due	10,206	5,295
60 - 89 Days Past Due | Commercial
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Days Past Due	3,388	514
60 - 89 Days Past Due | Commercial | Commercial and Industrial
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Days Past Due	3,388	514
60 - 89 Days Past Due | Commercial | Paycheck Protection Program
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Days Past Due	0	0
60 - 89 Days Past Due | Commercial | Commercial Mortgage
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Days Past Due	0	0
60 - 89 Days Past Due | Commercial | Construction
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Days Past Due	0	0
60 - 89 Days Past Due | Commercial | Lease Financing
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Days Past Due	0	0
60 - 89 Days Past Due | Consumer
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Days Past Due	6,818	4,781
60 - 89 Days Past Due | Consumer | Residential Mortgage
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Days Past Due	1,588	317
60 - 89 Days Past Due | Consumer | Home Equity
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Days Past Due	2,994	1,967
60 - 89 Days Past Due | Consumer | Automobile
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Days Past Due	1,214	1,478
60 - 89 Days Past Due | Consumer | Other
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Days Past Due	1,022	1,019
Past Due 90 Days or More
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Days Past Due	7,850	6,595
Past Due 90 Days or More | Commercial
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Days Past Due	0	0
Past Due 90 Days or More | Commercial | Commercial and Industrial
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Days Past Due	0	0
Past Due 90 Days or More | Commercial | Paycheck Protection Program
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Days Past Due	0	0
Past Due 90 Days or More | Commercial | Commercial Mortgage
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Days Past Due	0	0
Past Due 90 Days or More | Commercial | Construction
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Days Past Due	0	0
Past Due 90 Days or More | Commercial | Lease Financing
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Days Past Due	0	0
Past Due 90 Days or More | Consumer
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Days Past Due	7,850	6,595
Past Due 90 Days or More | Consumer | Residential Mortgage
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Days Past Due	4,524	3,814
Past Due 90 Days or More | Consumer | Home Equity
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Days Past Due	2,025	1,734
Past Due 90 Days or More | Consumer | Automobile
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Days Past Due	568	399
Past Due 90 Days or More | Consumer | Other
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Days Past Due	733	648
Current
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Days Past Due	13,778,421	13,912,772
Current | Commercial
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Days Past Due	5,804,799	5,767,301
Current | Commercial | Commercial and Industrial
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Days Past Due	1,683,534	1,645,398
Current | Commercial | Paycheck Protection Program
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Days Past Due	7,997	11,369
Current | Commercial | Commercial Mortgage
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Days Past Due	3,738,309	3,746,132
Current | Commercial | Construction
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Days Past Due	315,571	304,463
Current | Commercial | Lease Financing
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Days Past Due	59,388	59,939
Current | Consumer
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Days Past Due	7,973,622	8,145,471
Current | Consumer | Residential Mortgage
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Days Past Due	4,583,716	4,672,558
Current | Consumer | Home Equity
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Days Past Due	2,208,042	2,253,125
Current | Consumer | Automobile
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Days Past Due	792,784	822,711
Current | Consumer | Other
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Days Past Due	$ 389,080	$ 397,077