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Loans and Leases Receivable and Allowance for Credit Losses on Loans and Leases - Additional Information (Details)
12 Months Ended
Dec. 31, 2022
USD ($)
loan
commitment
Dec. 31, 2021
USD ($)
loan
commitment
Dec. 31, 2020
USD ($)
loan
commitment
Jan. 01, 2020
USD ($)
Dec. 31, 2019
USD ($)
Financing Receivable, Troubled Debt Restructuring [Line Items]          
Accrued interest $ 105,500,000 $ 81,600,000      
Financing receivable, excluding accrued interest, after allowance for credit loss $ 15,335,435,000 14,414,827,000      
Loans held for sale, average life from purchase to sale (days) 30 days        
Loans and leases receivable $ 13,144,894,000 9,018,298,000      
Interest income 745,313,000 736,822,000 $ 512,048,000    
Charge-offs 77,196,000 40,381,000 61,736,000    
Legal settlement gain 7,519,000 0 0    
Financing receivable, allowance for credit loss, excluding accrued interest 130,924,000 137,804,000 144,176,000 $ 144,200,000 $ 56,379,000
Allowance for credit loss, period increase (decrease) 6,900,000 6,400,000      
Loans reported as TDR 16,800,000 16,500,000 $ 16,100,000    
Troubled debt restructurings $ 0 $ 0      
Minimum performance requirement (months) 6 months        
Contractual terms for loans (months) 6 months        
Number of loans | loan 259 202 121    
Commitments to lend additional funds to debtors | commitment 0 0 0    
Financing Receivable, Accrued Interest, after Allowance for Credit Loss, Statement of Financial Position [Extensible Enumeration] Accrued interest receivable Accrued interest receivable      
Asset Pledged as Collateral          
Financing Receivable, Troubled Debt Restructuring [Line Items]          
Loans and leases receivable $ 7,100,000,000 $ 3,700,000,000      
Troubled Debt Restructurings          
Financing Receivable, Troubled Debt Restructuring [Line Items]          
Contractual terms for loans (months) 9 months        
Small Business Administration (SBA), CARES Act, Paycheck Protection Program          
Financing Receivable, Troubled Debt Restructuring [Line Items]          
Loans and leases receivable $ 1,000,000,000 3,300,000,000      
Interest income 79,400,000 279,200,000 $ 65,500,000    
Commercial real estate non-owner occupied          
Financing Receivable, Troubled Debt Restructuring [Line Items]          
Amount deferred, CARES Act 0 0      
Consumer loans          
Financing Receivable, Troubled Debt Restructuring [Line Items]          
Amount deferred, CARES Act 0 6,100,000      
Commercial and industrial, including specialty lending          
Financing Receivable, Troubled Debt Restructuring [Line Items]          
Loans and leases receivable 6,672,830,000 3,424,783,000      
Charge-offs 16,248,000 1,550,000 3,158,000    
Financing receivable, allowance for credit loss, excluding accrued interest 17,582,000 12,702,000 12,239,000   15,556,000
Commercial and industrial, including specialty lending | Loans Originated Under Small Business Administration (SBA) CARES Act Paycheck Protection Program, Subsequently Determined Ineligible For Forgiveness          
Financing Receivable, Troubled Debt Restructuring [Line Items]          
Charge-offs 11,000,000        
Commercial real estate non-owner occupied          
Financing Receivable, Troubled Debt Restructuring [Line Items]          
Loans and leases receivable 1,290,730,000 1,121,238,000      
Charge-offs 6,075,000 944,000 25,779,000    
Financing receivable, allowance for credit loss, excluding accrued interest 11,219,000 $ 6,210,000 $ 19,452,000   $ 6,243,000
Commercial real estate non-owner occupied | Performing          
Financing Receivable, Troubled Debt Restructuring [Line Items]          
Charge-offs $ 7,900,000        
Principal Forgiveness          
Financing Receivable, Troubled Debt Restructuring [Line Items]          
Number of loans | loan 0 0 0    
Commercial Real Estate | Other commercial and industrial | Collateral-dependent loans          
Financing Receivable, Troubled Debt Restructuring [Line Items]          
Financing receivable, excluding accrued interest, after allowance for credit loss $ 11,500,000 $ 38,900,000