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Loans and Allowance for Loan Losses - Narrative (Details)
 12 Months Ended
Dec. 31, 2025
USD ($)
Dec. 31, 2024
USD ($)
Dec. 31, 2023
USD ($)
Dec. 31, 2022
USD ($)
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Loans $ 44,625,627,000 $ 42,609,028,000    
Land held for future development, period 1 year      
Reclassification to held-for-sale $ 0 0    
Financing receivable, allowance for credit loss 477,934,000 486,845,000 $ 479,385,000 $ 443,424,000
Reserve for unfunded commitments 51,500,000 52,500,000    
All financing receivable, allowance for credit loss 529,500,000 539,300,000    
ACL increase (decrease) $ (9,800,000)      
ACL to loans ratio (as percent) 1.19%      
Increase (decrease) in ACL to loans ratio (0.0008)      
Allowance for credit loss, reasonable and supportable forecast period 2 years      
Allowance for credit loss, straight-line basis historical period 1 year      
Material FDMs subsequently defaulted $ 0 3,200,000    
Commitments to lend additional funds to TDRs 0 0    
Consumer        
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Reclassification to held-for-sale     1,590,000,000  
Charge-off of previously established reserves for credit losses associated with the transfer to held for sale     31,300,000  
Financing receivable, allowance for credit loss $ 146,464,000 142,299,000 $ 126,657,000 $ 138,299,000
Substandard        
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Retail loan substandard period (in days) 90 days      
Loss | Minimum        
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Retail loan charge off (in days) 120 days      
Loss | Maximum        
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Retail loan charge off (in days) 180 days      
Asset Pledged as Collateral        
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Loans $ 12,830,000,000 $ 24,660,000,000