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Loans and Leases Receivable and Allowance for Credit Losses on Loans and Leases - Additional Information (Detail) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2024
Dec. 31, 2023
Mar. 31, 2023
Dec. 31, 2022
Financing Receivable, Troubled Debt Restructuring [Line Items]        
Accrued interest $ 92,200 $ 95,000    
Loans receivable, excluding accrued interest $ 12,765,935 12,726,456    
Loans held for sale, average life from purchase to sale 30 days      
Allowance for credit loss, excluding accrued interest $ 133,296 135,311 $ 130,281 $ 130,924
Allowance for credit loss, period decrease 2,000      
Number of commitments to lend additional funds (commitment) 0      
Loans receivable, PPP 52,000 74,700    
Total consumer loans receivable 11,884,664 11,889,120    
Asset Pledged as Collateral        
Financing Receivable, Troubled Debt Restructuring [Line Items]        
Total consumer loans receivable 7,600,000 7,000,000    
Commercial Real Estate | Other commercial and industrial | Collateral Dependent Loan        
Financing Receivable, Troubled Debt Restructuring [Line Items]        
Loans receivable, excluding accrued interest $ 23,800 $ 15,800