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Loans and Leases and the Allowance for Credit Losses - Schedule of Loan and Lease Portfolio (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Accounts Notes And Loans Receivable [Line Items]
Loans and Leases	$ 13,853,837	$ 13,965,026
Commercial
Accounts Notes And Loans Receivable [Line Items]
Loans and Leases	5,775,577	5,777,486
Commercial | Commercial and Industrial
Accounts Notes And Loans Receivable [Line Items]
Loans and Leases	1,669,482	1,652,699
Commercial | Paycheck Protection Program
Accounts Notes And Loans Receivable [Line Items]
Loans and Leases	10,177	11,369
Commercial | Commercial Mortgage
Accounts Notes And Loans Receivable [Line Items]
Loans and Leases	3,715,032	3,749,016
Commercial | Construction
Accounts Notes And Loans Receivable [Line Items]
Loans and Leases	323,069	304,463
Commercial | Lease Financing
Accounts Notes And Loans Receivable [Line Items]
Loans and Leases	57,817	59,939
Consumer
Accounts Notes And Loans Receivable [Line Items]
Loans and Leases	8,078,260	8,187,540
Consumer | Residential Mortgage
Accounts Notes And Loans Receivable [Line Items]
Loans and Leases	4,616,900	4,684,171
Consumer | Home Equity
Accounts Notes And Loans Receivable [Line Items]
Loans and Leases	2,240,946	2,264,827
Consumer | Automobile
Accounts Notes And Loans Receivable [Line Items]
Loans and Leases	825,854	837,830
Consumer | Other
Accounts Notes And Loans Receivable [Line Items]
Loans and Leases	$ 394,560	$ 400,712

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+ References

No definition available.

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Amount before allowance and after deduction of deferred interest and fees, unamortized costs and premiums and discounts from face amounts, of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Excludes loans and leases covered under loss sharing agreements.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 310
-SubTopic 10
-Name Accounting Standards Codification
-Section 45
-Paragraph 2
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481990/310-10-45-2

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 4
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481962/310-10-50-4

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