Loans - Modification to Borrowers Experiencing Financial Difficulty (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2026	Sep. 30, 2025	Dec. 31, 2025
Financing Receivable, Troubled Debt Restructuring [Line Items]
Loans, net of unearned discounts	$ 23,656,967		$ 21,891,812
Payment Deferral
Financing Receivable, Troubled Debt Restructuring [Line Items]
Loans, net of unearned discounts	$ 54,939	$ 4,008
Financing Receivable, Modified in Period, to Total Financing Receivables, Percentage	0.20%	0.00%
Commercial Real Estate Non-Owner Occupied
Financing Receivable, Troubled Debt Restructuring [Line Items]
Loans, net of unearned discounts	$ 4,218,556		3,773,028
Commercial Real Estate Non-Owner Occupied | Payment Deferral
Financing Receivable, Troubled Debt Restructuring [Line Items]
Loans, net of unearned discounts	$ 54,939
Financing Receivable, Modified in Period, to Total Financing Receivables, Percentage	1.30%
Commercial Portfolio Segment [Member]
Financing Receivable, Troubled Debt Restructuring [Line Items]
Loans, net of unearned discounts	$ 6,467,069		6,306,980
Commercial Portfolio Segment [Member] | Payment Deferral
Financing Receivable, Troubled Debt Restructuring [Line Items]
Loans, net of unearned discounts		$ 2,236
Financing Receivable, Modified in Period, to Total Financing Receivables, Percentage		0.00%
Construction Loans [Member]
Financing Receivable, Troubled Debt Restructuring [Line Items]
Loans, net of unearned discounts	$ 2,757,013		$ 2,549,869
Construction Loans [Member] | Payment Deferral
Financing Receivable, Troubled Debt Restructuring [Line Items]
Loans, net of unearned discounts		$ 1,772
Financing Receivable, Modified in Period, to Total Financing Receivables, Percentage		0.10%