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SHAREHOLDERS’ EQUITY AND REGULATORY CAPITAL - Narrative (Detail) - USD ($)
$ / shares in Units, $ in Millions
 12 Months Ended 44 Months Ended
Jan. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2024
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     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)   259,536 34,380 482,712 949,533    
Total cost of shares repurchased under the program         $ 21.2    
Shares repurchased under the program, price per share (in dollars per share)         $ 22.36    
Stock available for future repurchases (in shares)   28,467     28,467    
Stock available for future repurchases, percentage   0.10%     0.10%    
Amount available for dividend distribution   $ 50.2     $ 50.2    
Maximum amount available to loan nonbank affiliates   $ 54.0 $ 32.1   $ 54.0    
Subsequent Event              
Class of Stock [Line Items]              
Cash dividend declared by the Board (in dollars per share) $ 0.26