Loans and Leases and the Allowance for Credit Losses - Schedule of Aging Analysis by Class of Loan and Lease Portfolio (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Days Past Due	$ 12,544,492	$ 12,259,076
Non-Accrual	17,647	16,634
Total Past Due and Non-Accrual	45,943	45,161
Total Loans and Leases	12,544,492	12,259,076
Non-Accrual Loans and Leases that are Current	9,691	9,900
Commercial
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Days Past Due	5,016,725	4,966,192
Non-Accrual	8,164	8,448
Total Past Due and Non-Accrual	10,218	10,468
Total Loans and Leases	5,016,725	4,966,192
Non-Accrual Loans and Leases that are Current	8,140	8,356
Commercial | Commercial and Industrial
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Days Past Due	1,354,757	1,361,921
Non-Accrual	99	243
Total Past Due and Non-Accrual	2,153	2,263
Total Loans and Leases	1,354,757	1,361,921
Non-Accrual Loans and Leases that are Current	75	151
Commercial | Paycheck Protection Program
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Days Past Due	57,809	126,779
Non-Accrual	0	0
Total Past Due and Non-Accrual	0	0
Total Loans and Leases	57,809	126,779
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	3,257,689	3,152,130
Non-Accrual	8,065	8,205
Total Past Due and Non-Accrual	8,065	8,205
Total Loans and Leases	3,257,689	3,152,130
Non-Accrual Loans and Leases that are Current	8,065	8,205
Commercial | Construction
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Days Past Due	248,363	220,254
Non-Accrual	0	0
Total Past Due and Non-Accrual	0	0
Total Loans and Leases	248,363	220,254
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	98,107	105,108
Non-Accrual	0	0
Total Past Due and Non-Accrual	0	0
Total Loans and Leases	98,107	105,108
Non-Accrual Loans and Leases that are Current	0	0
Consumer
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Days Past Due	7,527,767	7,292,884
Non-Accrual	9,483	8,186
Total Past Due and Non-Accrual	35,725	34,693
Total Loans and Leases	7,527,767	7,292,884
Non-Accrual Loans and Leases that are Current	1,551	1,544
Consumer | Residential Mortgage
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Days Past Due	4,405,718	4,309,602
Non-Accrual	3,845	3,305
Total Past Due and Non-Accrual	11,285	9,773
Total Loans and Leases	4,405,718	4,309,602
Non-Accrual Loans and Leases that are Current	202	0
Consumer | Home Equity
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Non-Accrual	5,638	4,881
Total Past Due and Non-Accrual	10,058	10,876
Total Loans and Leases	1,958,285	1,836,588
Non-Accrual Loans and Leases that are Current	1,349	1,544
Consumer | Automobile
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Days Past Due	742,934	736,565
Non-Accrual	0	0
Total Past Due and Non-Accrual	10,858	10,028
Total Loans and Leases	742,934	736,565
Non-Accrual Loans and Leases that are Current	0	0
Consumer | Other
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Non-Accrual	0	0
Total Past Due and Non-Accrual	3,524	4,016
Total Loans and Leases	420,830	410,129
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	15,672	16,333
30 - 59 Days Past Due | Commercial
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Days Past Due	145	2,006
30 - 59 Days Past Due | Commercial | Commercial and Industrial
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Days Past Due	145	2,006
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	0	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	15,527	14,327
30 - 59 Days Past Due | Consumer | Residential Mortgage
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Days Past Due	3,102	2,046
30 - 59 Days Past Due | Consumer | Home Equity
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Days Past Due	1,223	1,791
30 - 59 Days Past Due | Consumer | Automobile
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Days Past Due	9,185	7,804
30 - 59 Days Past Due | Consumer | Other
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Days Past Due	2,017	2,686
60 - 89 Days Past Due
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Days Past Due	4,614	4,424
60 - 89 Days Past Due | Commercial
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Days Past Due	1,887	14
60 - 89 Days Past Due | Commercial | Commercial and Industrial
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Days Past Due	1,887	14
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	2,727	4,410
60 - 89 Days Past Due | Consumer | Residential Mortgage
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Days Past Due	225	1,263
60 - 89 Days Past Due | Consumer | Home Equity
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Days Past Due	475	748
60 - 89 Days Past Due | Consumer | Automobile
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Days Past Due	1,169	1,495
60 - 89 Days Past Due | Consumer | Other
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Days Past Due	858	904
Past Due 90 Days or More
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Days Past Due	8,010	7,770
Past Due 90 Days or More | Commercial
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Days Past Due	22	0
Past Due 90 Days or More | Commercial | Commercial and Industrial
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Days Past Due	22	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	7,988	7,770
Past Due 90 Days or More | Consumer | Residential Mortgage
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Days Past Due	4,113	3,159
Past Due 90 Days or More | Consumer | Home Equity
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Days Past Due	2,722	3,456
Past Due 90 Days or More | Consumer | Automobile
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Days Past Due	504	729
Past Due 90 Days or More | Consumer | Other
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Days Past Due	649	426
Current
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Days Past Due	12,498,549	12,213,915
Current | Commercial
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Days Past Due	5,006,507	4,955,724
Current | Commercial | Commercial and Industrial
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Days Past Due	1,352,604	1,359,658
Current | Commercial | Paycheck Protection Program
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Days Past Due	57,809	126,779
Current | Commercial | Commercial Mortgage
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Days Past Due	3,249,624	3,143,925
Current | Commercial | Construction
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Days Past Due	248,363	220,254
Current | Commercial | Lease Financing
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Days Past Due	98,107	105,108
Current | Consumer
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Days Past Due	7,492,042	7,258,191
Current | Consumer | Residential Mortgage
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Days Past Due	4,394,433	4,299,829
Current | Consumer | Home Equity
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Days Past Due	1,948,227	1,825,712
Current | Consumer | Automobile
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Days Past Due	732,076	726,537
Current | Consumer | Other
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Days Past Due	$ 417,306	$ 406,113