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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 |

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