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SHAREHOLDERS' EQUITY AND REGULATORY CAPITAL - Narrative (Details) - USD ($)
$ / shares in Units, $ in Thousands
3 Months Ended 9 Months Ended 29 Months Ended
Oct. 24, 2023
Sep. 30, 2023
Sep. 30, 2022
Sep. 30, 2023
Sep. 30, 2022
Sep. 30, 2023
Jun. 30, 2023
Jan. 01, 2023
Dec. 31, 2022
Apr. 19, 2021
Sep. 30, 2015
Equity, Class of Treasury Stock [Line Items]                      
Allowance for credit loss impact of adoption   $ 28,278   $ 28,278   $ 28,278 $ 28,383   $ 25,178    
Off-balance-sheet, credit risk exposure liability   $ 1,700   $ 1,700   $ 1,700     1,633    
Number of shares reserved to be issued (in shares)   1,045,000   1,045,000   1,045,000          
Number of shares available to be issued under employee stock purchase plan (in shares)   665,000   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)   3,446 10,385 35,380 475,377 949,533          
Acquisition of treasury stock           $ 21,200          
Acquisition of treasury stock (in usd per share)           $ 22.36          
Stock repurchase program, shares available for future repurchase   28,467   28,467   28,467          
Stock repurchase program percentage of outstanding shares of common stock available for future purchase   0.30%   0.30%   0.30%          
Subsequent Event                      
Equity, Class of Treasury Stock [Line Items]                      
Dividends declared per share (in usd per share) $ 0.20                    
Common Stock                      
Equity, Class of Treasury Stock [Line Items]                      
Treasury stock, shares acquired (in shares)   0                  
Cumulative Effect, Period of Adoption, Adjustment                      
Equity, Class of Treasury Stock [Line Items]                      
Allowance for credit loss impact of adoption               $ 2,423 $ 2,423    
Off-balance-sheet, credit risk exposure liability               100      
Allowance for credit losses on loans and off-balance sheet credit risk liability               $ 2,500