Loans and Leases and the Allowance for Credit Losses - Schedule of Loan and Lease Portfolio (Details) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Loan and lease portfolio
Loans and Leases	$ 12,951,573	$ 12,259,076
Commercial
Loan and lease portfolio
Loans and Leases	5,155,632	4,966,192
Commercial | Commercial and Industrial
Loan and lease portfolio
Loans and Leases	1,323,830	1,361,921
Commercial | Paycheck Protection Program
Loan and lease portfolio
Loans and Leases	31,964	126,779
Commercial | Commercial Mortgage
Loan and lease portfolio
Loans and Leases	3,464,126	3,152,130
Commercial | Construction
Loan and lease portfolio
Loans and Leases	246,177	220,254
Commercial | Lease Financing
Loan and lease portfolio
Loans and Leases	89,535	105,108
Consumer
Loan and lease portfolio
Loans and Leases	7,795,941	7,292,884
Consumer | Residential Mortgage
Loan and lease portfolio
Loans and Leases	4,486,571	4,309,602
Consumer | Home Equity
Loan and lease portfolio
Loans and Leases	2,101,612	1,836,588
Consumer | Automobile
Loan and lease portfolio
Loans and Leases	775,065	736,565
Consumer | Other
Loan and lease portfolio
Loans and Leases	$ 432,693	$ 410,129