v3.26.3
Short-term Borrowings (Details)
$ in Thousands
9 Months Ended
Sep. 30, 2026
USD ($)
item
Sep. 30, 2025
USD ($)
Dec. 31, 2025
USD ($)
Short-term borrowings      
Short-term borrowings $ 825,220   $ 676,882
Federal funds purchased and securities sold under agreements to repurchase      
Short-term borrowings      
Average balance during the period $ 620,466 $ 517,561  
Average interest rate during the period 3.99% 4.58%  
Average interest rate at end of period (as a percent) 3.97%   4.25%
Contract value of repurchase agreements $ 288,643   $ 268,805
Fair value of securities pledged as collateral $ 291,925   292,493
Federal funds purchased and securities sold under agreements to repurchase | Minimum      
Short-term borrowings      
Maturity term of debt 1 day    
Federal funds purchased and securities sold under agreements to repurchase | Maximum      
Short-term borrowings      
Maturity term of debt 90 days    
Securities sold under agreements to repurchase      
Short-term borrowings      
Short-term borrowings $ 289,124   269,309
Federal funds purchased      
Short-term borrowings      
Short-term borrowings $ 118,283   153,208
Federal Home Loan Bank      
Short-term borrowings      
Average interest rate during the period 3.85% 4.70%  
Federal Home Loan Bank | Maximum      
Short-term borrowings      
Maturity term of debt 365 days    
Short-term bank loans      
Short-term borrowings      
Short-term borrowings $ 172,000    
Commercial paper      
Short-term borrowings      
Short-term borrowings $ 245,813   $ 254,365
Number of commercial paper programs initiated | item 2    
Weighted average interest rate on short-term bank loan borrowings (as a percent) 4.11%    
Weighted average remaining life 92 days    
Debt instrument, collateral $ 271,800    
Commercial paper | Minimum      
Short-term borrowings      
Maturity term of debt 14 days    
Commercial paper | Maximum      
Short-term borrowings      
Maturity term of debt 270 days    
Commercial paper | Weighted Average      
Short-term borrowings      
Weighted average maturity term 171 days    
Series 2019-2 CP Notes      
Short-term borrowings      
Maximum borrowing capacity $ 200,000    
Series 2024-1 CP Notes      
Short-term borrowings      
Maximum borrowing capacity $ 300,000    
Line of Credit | Hilltop Securities | Credit Arrangements      
Short-term borrowings      
Number of unaffiliated banks | item 2    
Maximum borrowing capacity $ 425,000    
Outstanding borrowing $ 122,000    
Weighted average interest rate 5.05%    
Line of Credit | Hilltop Securities | Revolving Credit Facilities      
Short-term borrowings      
Number of unaffiliated banks | item 2    
Maximum borrowing capacity $ 150,000    
Outstanding borrowing $ 50,000