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SHAREHOLDERS’ EQUITY AND REGULATORY CAPITAL - Narrative (Detail) - USD ($)
$ / shares in Units, $ in Millions
 12 Months Ended
Jan. 24, 2023
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Apr. 19, 2021
Sep. 30, 2015
Class of Stock [Line Items]            
Common stock reserved to be issued under dividend reinvestment and stock purchase plan (in shares)   1,045,000        
Shares available to be issued under the plan (in shares)   665,000        
Outstanding shares of common stock authorized to be repurchased (in shares)         978,000 416,000
Number of additional shares authorized to be repurchased         562,000  
Shares repurchased under the program (in shares)   818,941        
Total cost of shares repurchased under the program   $ 18.7        
Shares repurchased under the program, price per share (in dollars per share)   $ 22.78        
Stock available for future repurchases (in shares)   159,059        
Stock available for future repurchases, percentage   1.00%        
Cash dividend declared by the Board (in dollars per share)   $ 0.76 $ 0.74 $ 0.68    
Amount available for dividend distribution   $ 45.9        
Maximum amount available to loan nonbank affiliates   $ 29.3 $ 27.9      
Subsequent Event            
Class of Stock [Line Items]            
Cash dividend declared by the Board (in dollars per share) $ 0.20