Loans, Loan Composition (Details) - USD ($) $ in Thousands	Dec. 31, 2025	Dec. 31, 2024
Loans and Leases Receivable [Line Items]
Loans and Leases Receivable, Net of Deferred Income	$ 31,163,614	$ 29,768,586
Commercial and Industrial Sector [Member]
Loans and Leases Receivable [Line Items]
Loans and Leases Receivable, Net of Deferred Income	11,799,757	10,573,741
Commercial Real Estate Owner Occupied Portfolio [Member]
Loans and Leases Receivable [Line Items]
Loans and Leases Receivable, Net of Deferred Income	1,186,324	1,143,741
Commercial And Business Lending [Member]
Loans and Leases Receivable [Line Items]
Loans and Leases Receivable, Net of Deferred Income	12,986,081	11,717,483
Commercial Real Estate Investor Portfolio Segment [Member]
Loans and Leases Receivable [Line Items]
Loans and Leases Receivable, Net of Deferred Income	5,246,030	5,227,975
Construction Loans [Member]
Loans and Leases Receivable [Line Items]
Loans and Leases Receivable, Net of Deferred Income	1,994,642	1,982,632
Commercial Real Estate Portfolio Segment [Member]
Loans and Leases Receivable [Line Items]
Loans and Leases Receivable, Net of Deferred Income	7,240,672	7,210,607
Commercial Portfolio Segment [Member]
Loans and Leases Receivable [Line Items]
Loans and Leases Receivable, Net of Deferred Income	20,226,753	18,928,090
Residential Mortgage [Member]
Loans and Leases Receivable [Line Items]
Loans and Leases Receivable, Net of Deferred Income	6,793,957	7,047,541
Automobile Loan [Member]
Loans and Leases Receivable [Line Items]
Loans and Leases Receivable, Net of Deferred Income	3,106,498	2,810,220
Home Equity Line of Credit [Member]
Loans and Leases Receivable [Line Items]
Loans and Leases Receivable, Net of Deferred Income	713,271	664,252
Other Consumer [Member]
Loans and Leases Receivable [Line Items]
Loans and Leases Receivable, Net of Deferred Income	323,135	318,483
Consumer Portfolio Segment [Member]
Loans and Leases Receivable [Line Items]
Loans and Leases Receivable, Net of Deferred Income	$ 10,936,861	$ 10,840,496