v3.26.3
Short-Term Borrowings (Details) - USD ($)
$ in Thousands
Sep. 30, 2026
Dec. 31, 2025
Secured Debt, Repurchase Agreements    
Carrying amount of securities sold under repurchase agreements with customers $ 217,200 $ 311,400
Carrying amount of the securities pledged to collateralize repurchase agreements 8,705,780 8,715,214
Federal funds purchased 280,933 306,841
Outstanding advances 300,000
Loans held for investment, net of allowance for credit losses 51,464,175 48,013,330
FRB Borrowings    
Secured Debt, Repurchase Agreements    
Maximum borrowing capacity 11,900,000  
Loans held for investment, net of allowance for credit losses 16,000,000  
Debt Instrument Collateral Amount 11,900,000  
Letter of credit outstanding 0 0
FHLB Advances    
Secured Debt, Repurchase Agreements    
Outstanding advances 300,000 0
Debt Instrument Collateral Amount 6,000,000  
Amount of cash pledged as collateral 18,400  
Debt Instrument Unused Borrowing Capacity Amount 6,000,000  
Secured collateral 18,300  
Unused net credit available with the FHLB $ 5,700,000  
Asset Pledged as Collateral | FRB Borrowings    
Secured Debt, Repurchase Agreements    
Financing Receivable, Pledging Purpose [Extensible Enumeration] Federal funds purchased  
Asset Pledged as Collateral | FHLB Advances    
Secured Debt, Repurchase Agreements    
Debt Instrument Collateral Amount $ 9,500,000  
Amount of cash pledged as collateral 27,100  
Asset Pledged as Collateral | Securities sold under agreements to repurchase    
Secured Debt, Repurchase Agreements    
Carrying amount of the securities pledged to collateralize repurchase agreements $ 268,500 $ 331,500