Loans Composition (Details) - USD ($) $ in Thousands	Jun. 30, 2025	Dec. 31, 2024
Loans and Leases Receivable Disclosure [Line Items]
Loans and Leases Receivable, Net of Deferred Income	$ 30,607,605	$ 29,768,586
Commercial and Industrial Sector [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans and Leases Receivable, Net of Deferred Income	11,281,964	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	1,101,501	1,143,741
Commercial And Business Lending [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans and Leases Receivable, Net of Deferred Income	12,383,465	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	5,370,422	5,227,975
Construction Loans [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans and Leases Receivable, Net of Deferred Income	1,950,267	1,982,632
Commercial Real Estate Portfolio Segment [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans and Leases Receivable, Net of Deferred Income	7,320,689	7,210,607
Commercial Portfolio Segment [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans and Leases Receivable, Net of Deferred Income	19,704,154	18,928,090
Residential Mortgage [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans and Leases Receivable, Net of Deferred Income	6,949,387	7,047,541
Automobile Loan [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans and Leases Receivable, Net of Deferred Income	2,969,495	2,810,220
Home Equity Line of Credit [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans and Leases Receivable, Net of Deferred Income	676,208	664,252
Other Consumer [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans and Leases Receivable, Net of Deferred Income	308,361	318,483
Consumer Portfolio Segment [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans and Leases Receivable, Net of Deferred Income	$ 10,903,451	$ 10,840,496