XML 93 R74.htm IDEA: XBRL DOCUMENT v3.25.0.1
BORROWING ARRANGEMENTS - Narrative (Details)
 12 Months Ended
Dec. 31, 2024
USD ($)
oustanding_letters_of_credit
credit_line
Dec. 31, 2023
USD ($)
Line of Credit Facility [Line Items]    
Number of credit lines maintained by the Company | credit_line 3  
Federal funds purchased $ 0 $ 0
FHLB borrowings, unused funds 1,720,000,000  
Securities sold under agreements to repurchase $ 76,400,000 92,100,000
Maturity of repurchase agreements, less than 1 year  
Asset Pledged As Collateral, Excess Amount    
Line of Credit Facility [Line Items]    
Debt Securities $ 431,700,000 213,100,000
Federal Reserve Discount Window [Member]    
Line of Credit Facility [Line Items]    
Other borrowings 0 300,000,000.0
Federal Reserve Bank Term Funding Program    
Line of Credit Facility [Line Items]    
Other borrowings 0 $ 117,700,000
Frost Bank    
Line of Credit Facility [Line Items]    
Line of credit, maximum borrowing capacity 40,000,000.0  
Line of credit facility, capacity available for issuance of letters of credit $ 5,000,000.0  
Number of outstanding letters of credit | oustanding_letters_of_credit 1  
Letters of Credit Outstanding, Amount $ 155,000  
TIB - The Independent Bankers Bank    
Line of Credit Facility [Line Items]    
Line of credit, maximum borrowing capacity $ 15,000,000.0  
FHLB    
Line of Credit Facility [Line Items]    
Number of outstanding letters of credit | oustanding_letters_of_credit 1  
Letters of Credit Outstanding, Amount $ 6,100,000  
Amegy Bank    
Line of Credit Facility [Line Items]    
Line of credit, maximum borrowing capacity $ 25,000,000.0  
Minimum    
Line of Credit Facility [Line Items]    
FHLB borrowings, interest rate at period end 0.27%  
Maturity range of FHLB borrowings 2 days  
Maximum    
Line of Credit Facility [Line Items]    
FHLB borrowings, interest rate at period end 4.80%  
Maturity range of FHLB borrowings 3 years 9 months 18 days