Loans, Loan Composition (Details) - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023
Loans and Leases Receivable [Line Items]
Loans and Leases Receivable, Net of Deferred Income	$ 29,768,586	$ 29,216,218
Commercial and Industrial Sector [Member]
Loans and Leases Receivable [Line Items]
Loans and Leases Receivable, Net of Deferred Income	10,573,741	9,731,555
Commercial Real Estate Owner Occupied Portfolio [Member]
Loans and Leases Receivable [Line Items]
Loans and Leases Receivable, Net of Deferred Income	1,143,741	1,061,700
Commercial And Business Lending [Member]
Loans and Leases Receivable [Line Items]
Loans and Leases Receivable, Net of Deferred Income	11,717,483	10,793,255
Commercial Real Estate Investor Portfolio Segment [Member]
Loans and Leases Receivable [Line Items]
Loans and Leases Receivable, Net of Deferred Income	5,227,975	5,124,245
Construction Loans [Member]
Loans and Leases Receivable [Line Items]
Loans and Leases Receivable, Net of Deferred Income	1,982,632	2,271,398
Commercial Real Estate Portfolio Segment [Member]
Loans and Leases Receivable [Line Items]
Loans and Leases Receivable, Net of Deferred Income	7,210,607	7,395,644
Commercial Portfolio Segment [Member]
Loans and Leases Receivable [Line Items]
Loans and Leases Receivable, Net of Deferred Income	18,928,090	18,188,898
Residential Mortgage [Member]
Loans and Leases Receivable [Line Items]
Loans and Leases Receivable, Net of Deferred Income	7,047,541	7,864,891
Automobile Loan [Member]
Loans and Leases Receivable [Line Items]
Loans and Leases Receivable, Net of Deferred Income	2,810,220	2,256,162
Home Equity Line of Credit [Member]
Loans and Leases Receivable [Line Items]
Loans and Leases Receivable, Net of Deferred Income	664,252	628,526
Other Consumer [Member]
Loans and Leases Receivable [Line Items]
Loans and Leases Receivable, Net of Deferred Income	318,483	277,740
Consumer Portfolio Segment [Member]
Loans and Leases Receivable [Line Items]
Loans and Leases Receivable, Net of Deferred Income	$ 10,840,496	$ 11,027,319