v3.25.2
Borrowings (Details) - USD ($)
$ in Thousands
Jun. 13, 2025
Jun. 30, 2025
Dec. 31, 2024
Secured Debt, Repurchase Agreements      
Carrying amount of securities sold under repurchase agreements with customers   $ 266,500 $ 254,700
Carrying amount of the securities pledged to collateralize repurchase agreements   8,431,345 6,798,876
Federal funds purchased   364,032 260,191
Letter of credit outstanding   2,300  
Loans held for investment, net of allowance for credit losses   46,646,201 33,437,647
Net proceeds $ 346,500    
FRB Borrowings      
Secured Debt, Repurchase Agreements      
Debt Instrument Collateral Amount   10,200,000  
Letter of credit outstanding   0 0
Maximum borrowing capacity   10,200,000  
Loans held for investment, net of allowance for credit losses   13,600,000  
Subordinated Debt      
Secured Debt, Repurchase Agreements      
Original Principal amount $ 350,000    
Fixed interest rate (as a percent) 7.00%    
Spread on variable rate basis (as a percent) 3.19%    
Debt Instrument, Variable Interest Rate, Type [Extensible Enumeration] us-gaap:SecuredOvernightFinancingRateSofrMember    
FHLB Advances      
Secured Debt, Repurchase Agreements      
Outstanding advances   0 0
Debt Instrument Collateral Amount   5,400,000  
Amount of cash pledged as collateral   150,300  
Unused net credit available with the FHLB   5,600,000  
Debt Instrument Unused Borrowing Capacity Amount   $ 5,600,000  
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   $ 9,100,000  
Amount of cash pledged as collateral   216,700  
Asset Pledged as Collateral | Securities sold under agreements to repurchase      
Secured Debt, Repurchase Agreements      
Carrying amount of the securities pledged to collateralize repurchase agreements   $ 334,000 $ 370,400