v3.26.1
Loans, Leases and Allowance for Credit Losses - Schedule of Held for Investment Loan Portfolio Composition of Loans, Leases and Allowance for Credit Losses (Detail) - USD ($)
$ in Millions
Mar. 31, 2026
Dec. 31, 2025
Mar. 31, 2025
Dec. 31, 2024
Financing Receivable, Allowance for Credit Loss [Line Items]        
Loans HFI, net of deferred fees and costs $ 59,142.0 $ 58,677.0    
Less: allowance for credit losses (461.1) (460.6) $ (388.6) $ (373.8)
Net loans HFI 58,681.0 58,216.0    
Mortgage finance        
Financing Receivable, Allowance for Credit Loss [Line Items]        
Loans HFI, net of deferred fees and costs 7,105.0 7,271.0    
Less: allowance for credit losses (5.7) (5.5) (4.5) (4.8)
Municipal & nonprofit        
Financing Receivable, Allowance for Credit Loss [Line Items]        
Loans HFI, net of deferred fees and costs 1,683.0 1,648.0    
Less: allowance for credit losses (18.4) (13.0) (14.8) (14.7)
Tech & innovation        
Financing Receivable, Allowance for Credit Loss [Line Items]        
Loans HFI, net of deferred fees and costs 4,280.0 4,128.0    
Less: allowance for credit losses (52.9) (44.8) (44.9) (55.9)
Equity fund resources        
Financing Receivable, Allowance for Credit Loss [Line Items]        
Loans HFI, net of deferred fees and costs 1,261.0 1,233.0    
Less: allowance for credit losses (4.0) (2.6) (1.4) (1.6)
Other commercial and industrial        
Financing Receivable, Allowance for Credit Loss [Line Items]        
Loans HFI, net of deferred fees and costs 14,132.0 13,789.0    
Less: allowance for credit losses (174.0) (184.7) (93.5) (79.4)
CRE - owner occupied        
Financing Receivable, Allowance for Credit Loss [Line Items]        
Loans HFI, net of deferred fees and costs 1,563.0 1,533.0    
Less: allowance for credit losses (3.6) (3.4) (3.7) (3.4)
Hotel franchise finance        
Financing Receivable, Allowance for Credit Loss [Line Items]        
Loans HFI, net of deferred fees and costs 4,331.0 4,185.0    
Less: allowance for credit losses (40.5) (37.7) (33.2) (35.3)
Other CRE - non-owner occupied        
Financing Receivable, Allowance for Credit Loss [Line Items]        
Loans HFI, net of deferred fees and costs 6,334.0 6,455.0    
Less: allowance for credit losses (99.4) (110.4) (138.1) (134.4)
Residential        
Financing Receivable, Allowance for Credit Loss [Line Items]        
Loans HFI, net of deferred fees and costs 13,547.0 13,403.0    
Less: allowance for credit losses (23.7) (23.7) (19.7) (19.7)
Residential EBO        
Financing Receivable, Allowance for Credit Loss [Line Items]        
Loans HFI, net of deferred fees and costs 792.0 828.0    
Less: allowance for credit losses 0.0 0.0 0.0 0.0
Construction and land development        
Financing Receivable, Allowance for Credit Loss [Line Items]        
Loans HFI, net of deferred fees and costs 3,961.0 4,043.0    
Less: allowance for credit losses (37.6) (32.3) (32.0) (21.3)
Other        
Financing Receivable, Allowance for Credit Loss [Line Items]        
Loans HFI, net of deferred fees and costs 153.0 161.0    
Less: allowance for credit losses $ (1.3) $ (2.5) $ (2.8) $ (3.3)