Loans Composition (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023
Loans and Leases Receivable Disclosure [Line Items]
Loans and Leases Receivable, Net of Deferred Income	$ 29,990,897	$ 29,216,218
Commercial and Industrial Sector [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans and Leases Receivable, Net of Deferred Income	10,258,899	9,731,555
Commercial Real Estate Owner Occupied Portfolio [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans and Leases Receivable, Net of Deferred Income	1,120,849	1,061,700
Commercial And Business Lending [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans and Leases Receivable, Net of Deferred Income	11,379,748	10,793,255
Commercial Real Estate Investor Portfolio Segment [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans and Leases Receivable, Net of Deferred Income	5,070,635	5,124,245
Construction Loans [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans and Leases Receivable, Net of Deferred Income	2,114,300	2,271,398
Commercial Real Estate Portfolio Segment [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans and Leases Receivable, Net of Deferred Income	7,184,934	7,395,644
Commercial Portfolio Segment [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans and Leases Receivable, Net of Deferred Income	18,564,683	18,188,898
Residential Mortgage [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans and Leases Receivable, Net of Deferred Income	7,803,083	7,864,891
Automobile Loan [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans and Leases Receivable, Net of Deferred Income	2,708,946	2,256,162
Home Equity Line of Credit [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans and Leases Receivable, Net of Deferred Income	651,379	628,526
Other Consumer [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans and Leases Receivable, Net of Deferred Income	262,806	277,740
Consumer Portfolio Segment [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans and Leases Receivable, Net of Deferred Income	$ 11,426,214	$ 11,027,319