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Loans - Financing Receivables, Modified Loans Past Due in Excess of 90 Days or on Non-Accrual Status at Period-End (Details) - USD ($) $ in Thousands | Sep. 30, 2024 | Dec. 31, 2023 | Sep. 30, 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
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
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
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
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
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
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
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
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
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

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