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Loans Composition (Details) - USD ($) $ in Thousands | Sep. 30, 2025 | Dec. 31, 2024
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Loans and Leases Receivable Disclosure [Line Items] |  |
Loans and Leases Receivable, Net of Deferred Income | $ 30,951,964 | $ 29,768,586
Commercial and Industrial Sector [Member] |  |
Loans and Leases Receivable Disclosure [Line Items] |  |
Loans and Leases Receivable, Net of Deferred Income | 11,567,651 | 10,573,741
Commercial Real Estate Owner Occupied Portfolio [Member] |  |
Loans and Leases Receivable Disclosure [Line Items] |  |
Loans and Leases Receivable, Net of Deferred Income | 1,149,939 | 1,143,741
Commercial And Business Lending [Member] |  |
Loans and Leases Receivable Disclosure [Line Items] |  |
Loans and Leases Receivable, Net of Deferred Income | 12,717,590 | 11,717,483
Commercial Real Estate Investor Portfolio Segment [Member] |  |
Loans and Leases Receivable Disclosure [Line Items] |  |
Loans and Leases Receivable, Net of Deferred Income | 5,369,441 | 5,227,975
Construction Loans [Member] |  |
Loans and Leases Receivable Disclosure [Line Items] |  |
Loans and Leases Receivable, Net of Deferred Income | 1,958,766 | 1,982,632
Commercial Real Estate Portfolio Segment [Member] |  |
Loans and Leases Receivable Disclosure [Line Items] |  |
Loans and Leases Receivable, Net of Deferred Income | 7,328,207 | 7,210,607
Commercial Portfolio Segment [Member] |  |
Loans and Leases Receivable Disclosure [Line Items] |  |
Loans and Leases Receivable, Net of Deferred Income | 20,045,797 | 18,928,090
Residential Mortgage [Member] |  |
Loans and Leases Receivable Disclosure [Line Items] |  |
Loans and Leases Receivable, Net of Deferred Income | 6,858,285 | 7,047,541
Automobile Loan [Member] |  |
Loans and Leases Receivable Disclosure [Line Items] |  |
Loans and Leases Receivable, Net of Deferred Income | 3,041,644 | 2,810,220
Home Equity Line of Credit [Member] |  |
Loans and Leases Receivable Disclosure [Line Items] |  |
Loans and Leases Receivable, Net of Deferred Income | 698,112 | 664,252
Other Consumer [Member] |  |
Loans and Leases Receivable Disclosure [Line Items] |  |
Loans and Leases Receivable, Net of Deferred Income | 308,126 | 318,483
Consumer Portfolio Segment [Member] |  |
Loans and Leases Receivable Disclosure [Line Items] |  |
Loans and Leases Receivable, Net of Deferred Income | $ 10,906,167 | $ 10,840,496

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