Loans - Modification to Borrowers Experiencing Financial Difficulty (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Dec. 31, 2024
Financing Receivable, Troubled Debt Restructuring [Line Items]
Loans, net of unearned discounts	$ 21,254,495		$ 20,754,813
Payment Deferral
Financing Receivable, Troubled Debt Restructuring [Line Items]
Loans, net of unearned discounts	4,977
Combination: Payment Delay and Term Extention
Financing Receivable, Troubled Debt Restructuring [Line Items]
Loans, net of unearned discounts	0
Commercial Portfolio Segment [Member]
Financing Receivable, Troubled Debt Restructuring [Line Items]
Loans, net of unearned discounts	6,069,215		6,109,532
Commercial Portfolio Segment [Member] \| Payment Deferral
Financing Receivable, Troubled Debt Restructuring [Line Items]
Loans, net of unearned discounts	$ 3,101	$ 0
Financing Receivable, Modified in Period, to Total Financing Receivables, Percentage	0.10%	0.00%
Commercial Portfolio Segment [Member] \| Combination: Payment Delay and Term Extention
Financing Receivable, Troubled Debt Restructuring [Line Items]
Loans, net of unearned discounts	$ 0	$ 27,731
Financing Receivable, Modified in Period, to Total Financing Receivables, Percentage	0.00%	0.40%
Commercial Real Estate Buildings Land And Other Loans [Member]
Financing Receivable, Troubled Debt Restructuring [Line Items]
Loans, net of unearned discounts	$ 8,018,049		$ 7,704,447
Commercial Real Estate Buildings Land And Other Loans [Member] \| Payment Deferral
Financing Receivable, Troubled Debt Restructuring [Line Items]
Loans, net of unearned discounts	$ 1,876
Financing Receivable, Modified in Period, to Total Financing Receivables, Percentage	0.00%
Commercial Real Estate Buildings Land And Other Loans [Member] \| Combination: Payment Delay and Term Extention
Financing Receivable, Troubled Debt Restructuring [Line Items]
Loans, net of unearned discounts	$ 0
Financing Receivable, Modified in Period, to Total Financing Receivables, Percentage	0.00%