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SHARE-BASED COMPENSATION PLANS - Company's stock option activity (Details) - Employee stock option - USD ($)
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
SHARE-BASED COMPENSATION PLANS    
Shares, Outstanding at beginning of period 1,279,833 1,125,383
Shares, Granted 143,500 186,900
Shares, Exercised (60,914) (1,300)
Shares, Forfeited or expired (17,050) (31,150)
Shares, Outstanding at end of period 1,345,369 1,279,833
Shares, Exercisable at end of period 891,733 768,522
Weighted Average Exercise Price, Outstanding at beginning of period (in dollars per share) $ 25.44 $ 25.62
Weighted Average Exercise Price, Granted (in dollars per share) 28.83 24.00
Weighted Average Exercise Price, Exercised (in dollars per share) 24.96 18.00
Weighted Average Exercise Price, Forfeited or expired (in dollars per share) 24.79 24.06
Weighted Average Exercise Price, Outstanding at end of period (in dollars per share) 25.83 25.44
Weighted Average Exercise Price, Exercisable at end of period (in dollars per share) $ 26.36 26.58
Weighted Average Remaining Contractual Term (Years), Outstanding 5 years 3 months 18 days  
Weighted Average Remaining Contractual Term (Years), Exercisable, Outstanding 3 years 8 months 12 days  
Aggregate Intrinsic Value, Outstanding $ 532,000  
Aggregate Intrinsic Value, Exercisable $ 234,000  
Fair market value of options granted (in dollars per share) $ 6.78 $ 4.16