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Loans - Modification to Borrowers Experiencing Financial Difficulty (Details) - USD ($)
$ in Thousands
6 Months Ended
Jun. 30, 2024
Jun. 30, 2023
Dec. 31, 2023
Financing Receivable, Troubled Debt Restructuring [Line Items]      
Loans, net of unearned discounts $ 19,995,756   $ 18,824,251
Combination: Payment Delay and Term Extention      
Financing Receivable, Troubled Debt Restructuring [Line Items]      
Loans, net of unearned discounts   $ 36,486  
Financing Receivable, Modified in Period, to Total Financing Receivables, Percentage   0.20%  
Commercial Portfolio Segment [Member]      
Financing Receivable, Troubled Debt Restructuring [Line Items]      
Loans, net of unearned discounts 6,210,179   5,967,182
Commercial Portfolio Segment [Member] | Combination: Payment Delay and Term Extention      
Financing Receivable, Troubled Debt Restructuring [Line Items]      
Loans, net of unearned discounts $ 27,731 $ 16,020  
Financing Receivable, Modified in Period, to Total Financing Receivables, Percentage 0.40% 0.30%  
Commercial Real Estate Buildings Land And Other Loans [Member]      
Financing Receivable, Troubled Debt Restructuring [Line Items]      
Loans, net of unearned discounts $ 7,497,667   $ 7,301,920
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   $ 20,466  
Financing Receivable, Modified in Period, to Total Financing Receivables, Percentage   0.30%