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STOCK-BASED COMPENSATION PLANS - Summary (Details) - $ / shares
3 Months Ended 6 Months Ended
Jun. 30, 2023
Jun. 30, 2022
Jun. 30, 2023
Jun. 30, 2022
Restricted Stock Units        
Stock-based compensation plans        
Outstanding (in units) 129,422 120,631 139,986 109,244
Granted (in units) 41,847 46,312
Exercised (in units)     (51,693) (34,925)
Forfeited (in units)     (718)  
Outstanding (in units) 129,422 120,631 129,422 120,631
Weighted Average Grant Date Assigned Value        
Outstanding (in dollars per unit) $ 19.58 $ 17.98 $ 18.01 $ 17.27
Granted (in dollars per unit) 22.72 19.11
Exercised (in dollars per unit)     17.91 17.26
Forfeited (in dollars per unit)     16.58  
Outstanding (in dollars per unit) $ 19.58 $ 17.98 $ 19.58 $ 17.98
Performance Shares        
Stock-based compensation plans        
Outstanding (in units) 79,097 62,067 62,067 38,344
Granted (in units) 17,030 23,723
Outstanding (in units) 79,097 62,067 79,097 62,067
Weighted Average Grant Date Assigned Value        
Outstanding (in dollars per unit) $ 18.25 $ 17.02 $ 17.02 $ 15.72
Granted (in dollars per unit) 22.72 19.14
Outstanding (in dollars per unit) $ 18.25 $ 17.02 $ 18.25 $ 17.02
Stock Appreciation Rights        
Stock-based compensation plans        
Outstanding (in units) 73,440 91,800 73,440 97,920
Granted (in units)  
Exercised (in units)       (6,120)
Outstanding (in units) 73,440 91,800 73,440 91,800
Exercisable (in shares) 67,320   67,320  
Weighted Average Grant Date Assigned Value        
Outstanding (in dollars per unit) $ 16.32 $ 16.32 $ 16.32 $ 16.32
Granted (in dollars per unit)  
Exercised (in dollars per unit)       16.32
Outstanding (in dollars per unit) $ 16.32 $ 16.32 $ 16.32 $ 16.32
Weighted average remaining contractual term     6 years 2 months 12 days