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FEDERAL HOME LOAN BANK ADVANCES (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2023
Dec. 31, 2022
Advance from Federal Home Loan Bank    
Federal Home Loan Bank advances $ 85,790 $ 81,388
Federal Home Loan Bank of Chicago    
Advance from Federal Home Loan Bank    
FHLB program, admitted assets, actual 3,000,000  
FHLB program, maximum borrowing capacity 750,000  
Federal Home Loan Bank advances 86,000  
Interest expense on FHLB borrowings 1,000  
FHLB program, investments pledged as security $ 106,000  
Federal Home Loan Bank of Chicago | Minimum    
Advance from Federal Home Loan Bank    
FHLB advances, interest rate (as a percent) 4.20%  
Federal Home Loan Bank of Chicago | Maximum    
Advance from Federal Home Loan Bank    
FHLB advances, interest rate (as a percent) 5.50%