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SHAREHOLDERS' EQUITY AND REGULATORY CAPITAL - Narrative (Details) - USD ($)
$ / shares in Units, $ in Millions
3 Months Ended 47 Months Ended
Apr. 22, 2025
Mar. 31, 2025
Mar. 31, 2024
Mar. 31, 2025
Apr. 19, 2021
Sep. 30, 2015
Equity, Class of Treasury Stock [Line Items]            
Number of shares reserved to be issued (in shares)   1,045,000   1,045,000    
Number of shares available to be issued under employee stock purchase plan (in shares)   665,000   665,000    
Number of shares authorized to be repurchased (in shares)         978,000 416,000
Stock repurchase program, additional number of shares authorized to be repurchased         562,000  
Treasury stock, shares acquired (in shares)   120,975 94,065 949,533    
Acquisition of treasury stock       $ 21.2    
Acquisition of treasury stock (in usd per share)       $ 22.36    
Stock repurchase program, shares available for future repurchase   28,467   28,467    
Stock repurchase program percentage of outstanding shares of common stock available for future purchase   0.10%   0.10%    
Subsequent Event            
Equity, Class of Treasury Stock [Line Items]            
Dividends declared per share (in usd per share) $ 0.26          
Common Stock            
Equity, Class of Treasury Stock [Line Items]            
Treasury stock, shares acquired (in shares)   0