XML 70 R57.htm IDEA: XBRL DOCUMENT v3.25.1
Borrowings - Additional information (Details)
$ in Millions
3 Months Ended
Feb. 24, 2020
USD ($)
Mar. 31, 2025
USD ($)
item
Jun. 30, 2021
USD ($)
Dec. 31, 2024
USD ($)
Dec. 06, 2024
item
Borrowings          
Number of customers having secured balances exceeding specified percentage of stockholders equity | item   0      
Threshold percentage of stockholders' equity   10.00%      
Borrowings at FHLBC as percentage of total assets   35.00%      
Number of bank branches acquired | item         5
FHLBC stock   $ 4.5   $ 4.5  
Proceeds from term note $ 30.0        
Outstanding, net of deferred issuance costs   59.5   59.5  
Asset Pledged as Collateral with Right | Securities sold under repurchase agreements          
Borrowings          
Investment securities pledged with financial institutions, dollars   73.9   73.6  
Securities sold under repurchase agreements          
Borrowings          
Investment securities pledged with financial institutions, dollars   $ 38.7   36.7  
Federal Home Loan Bank Advances          
Borrowings          
Borrowings at FHLBC as percentage of book value of certain mortgage loans   60.00%      
FHLBC advance amount       $ 20.0  
FHLBC stock   $ 4.5      
Principal balance of loans collateralized   1,400.0      
Combined collateral value   929.8      
Amount available for additional borrowings   $ 928.6      
Subordinated Notes Due 2031          
Borrowings          
Interest rate (as a percent)     3.50%    
Face amount     $ 60.0    
Subordinated Notes Due 2031 | Three Months Secured Overnight Financing Rate          
Borrowings          
Basis points added to reference rate (as a percent)     2.73%