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BORROWINGS Borrowings - - Additional Information (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2025
Dec. 31, 2024
Apr. 01, 2018
Carrying Value of Securities Sold under Repurchase Agreements and Deposits Received for Securities Loaned $ 0 $ 0  
Federal Funds Purchased 0 0  
FHLB short-term borrowings 735,000 625,000  
Line of Credit Facility, Maximum Borrowing Capacity 40,000    
Short-term Debt 799,792 755,452  
Long-term Debt 345,878 347,509  
Convertible Subordinated Debt $ 150,000    
Subordinated Borrowing, Interest Rate 5.13%    
Debt Instrument, Basis Spread on Variable Rate 5.09%    
Subordinated debt $ 120,000    
Subordinated debt $ 314,734 $ 314,619  
Debt, Weighted Average Interest Rate 5.42% 5.43%  
Weighted average rate on other long-term debt 0.00% 0.00%  
Other Notes payable interest rate 5.16% 4.95%  
Short-term Debt      
Short-term Debt $ 64,792 $ 130,452  
Federal Home Loan Bank Borrowings      
Short-term Debt $ 735,000 625,000  
Long-term Debt [Member]      
Subordinated Borrowing, Interest Rate 5.25%    
Subordinated Debt [Member]      
Subordinated debt $ 44,700 $ 44,600 $ 49,500
Debt Instrument Maturity Period 30 years    
DebtInstrumentMinimumCallablePeriod 5 years