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Loans and Allowance for Credit Losses for Loans - Summary of Collateral Dependent Loans (Details) - USD ($)
$ in Thousands
Dec. 31, 2025
Dec. 31, 2024
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Loans $ 50,136,728 $ 48,799,711
Collateral dependent impaired loans, recorded investment 187,100 215,200
Commercial and Industrial    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Loans 10,961,519 9,931,400
Commercial real estate    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Loans 29,243,982 29,644,958
Commercial real estate | Commercial real estate    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Loans 26,772,749 26,530,225
Commercial real estate | Construction    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Loans 2,471,233 3,114,733
Residential mortgage    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Loans 5,826,192 5,632,516
Consumer    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Loans 4,105,035 3,590,837
Consumer | Home equity    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Loans 687,680 604,433
Taxi Medallion Loan Portfolio    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Collateral dependent impaired loans, recorded investment 47,100 49,500
Collateral Pledged    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Loans 416,153 329,702
Collateral Pledged | Commercial and Industrial    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Loans 159,594 131,898
Collateral Pledged | Commercial real estate    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Loans 225,982 172,666
Collateral Pledged | Commercial real estate | Commercial real estate    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Loans 225,982 156,825
Collateral Pledged | Commercial real estate | Construction    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Loans 0 15,841
Collateral Pledged | Residential mortgage    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Loans 28,569 23,797
Collateral Pledged | Consumer | Home equity    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Loans $ 2,008 $ 1,341