Loans - Modification to Borrowers Experiencing Financial Difficulty (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Dec. 31, 2023
Financing Receivable, Troubled Debt Restructuring [Line Items]
Loans, net of unearned discounts	$ 20,054,863		$ 18,824,251
Payment Deferral
Financing Receivable, Troubled Debt Restructuring [Line Items]
Loans, net of unearned discounts	$ 3,884	$ 0
Financing Receivable, Modified in Period, to Total Financing Receivables, Percentage	0.00%	0.00%
Payment Deferral | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Financing Receivable, Troubled Debt Restructuring [Line Items]
Loans, net of unearned discounts	$ 3,884
Combination: Payment Delay and Term Extention
Financing Receivable, Troubled Debt Restructuring [Line Items]
Loans, net of unearned discounts	$ 46,925	$ 35,697
Financing Receivable, Modified in Period, to Total Financing Receivables, Percentage	0.20%	0.20%
Combination: Payment Delay and Term Extention | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Financing Receivable, Troubled Debt Restructuring [Line Items]
Loans, net of unearned discounts	$ 19,994
Combination: Interest Rate Reduction and Term Extention
Financing Receivable, Troubled Debt Restructuring [Line Items]
Loans, net of unearned discounts	$ 0	$ 2,100
Financing Receivable, Modified in Period, to Total Financing Receivables, Percentage	0.00%	0.00%
Combination: Interest Rate Reduction and Term Extention | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Financing Receivable, Troubled Debt Restructuring [Line Items]
Loans, net of unearned discounts		$ 2,100
Commercial Portfolio Segment [Member]
Financing Receivable, Troubled Debt Restructuring [Line Items]
Loans, net of unearned discounts	$ 5,822,976		5,967,182
Commercial Portfolio Segment [Member] | Payment Deferral
Financing Receivable, Troubled Debt Restructuring [Line Items]
Loans, net of unearned discounts	$ 1,823	$ 0
Financing Receivable, Modified in Period, to Total Financing Receivables, Percentage	0.00%	0.00%
Commercial Portfolio Segment [Member] | Payment Deferral | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Financing Receivable, Troubled Debt Restructuring [Line Items]
Loans, net of unearned discounts	$ 1,823
Commercial Portfolio Segment [Member] | Combination: Payment Delay and Term Extention
Financing Receivable, Troubled Debt Restructuring [Line Items]
Loans, net of unearned discounts	$ 46,925	$ 15,912
Financing Receivable, Modified in Period, to Total Financing Receivables, Percentage	0.80%	0.30%
Commercial Portfolio Segment [Member] | Combination: Payment Delay and Term Extention | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Financing Receivable, Troubled Debt Restructuring [Line Items]
Loans, net of unearned discounts	$ 19,994
Commercial Portfolio Segment [Member] | Combination: Interest Rate Reduction and Term Extention
Financing Receivable, Troubled Debt Restructuring [Line Items]
Loans, net of unearned discounts	$ 0	$ 0
Financing Receivable, Modified in Period, to Total Financing Receivables, Percentage	0.00%	0.00%
Commercial Portfolio Segment [Member] | Combination: Interest Rate Reduction and Term Extention | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Financing Receivable, Troubled Debt Restructuring [Line Items]
Loans, net of unearned discounts		$ 0
Commercial Real Estate Buildings Land And Other Loans [Member]
Financing Receivable, Troubled Debt Restructuring [Line Items]
Loans, net of unearned discounts	$ 7,475,265		$ 7,301,920
Commercial Real Estate Buildings Land And Other Loans [Member] | Payment Deferral
Financing Receivable, Troubled Debt Restructuring [Line Items]
Loans, net of unearned discounts	$ 2,061	$ 0
Financing Receivable, Modified in Period, to Total Financing Receivables, Percentage	0.00%	0.00%
Commercial Real Estate Buildings Land And Other Loans [Member] | Payment Deferral | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Financing Receivable, Troubled Debt Restructuring [Line Items]
Loans, net of unearned discounts	$ 2,061
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	$ 19,785
Financing Receivable, Modified in Period, to Total Financing Receivables, Percentage	0.00%	0.30%
Commercial Real Estate Buildings Land And Other Loans [Member] | Combination: Payment Delay and Term Extention | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Financing Receivable, Troubled Debt Restructuring [Line Items]
Loans, net of unearned discounts	$ 0
Commercial Real Estate Buildings Land And Other Loans [Member] | Combination: Interest Rate Reduction and Term Extention
Financing Receivable, Troubled Debt Restructuring [Line Items]
Loans, net of unearned discounts	$ 0	$ 2,100
Financing Receivable, Modified in Period, to Total Financing Receivables, Percentage	0.00%	0.00%
Commercial Real Estate Buildings Land And Other Loans [Member] | Combination: Interest Rate Reduction and Term Extention | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Financing Receivable, Troubled Debt Restructuring [Line Items]
Loans, net of unearned discounts		$ 2,100