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SHARE-BASED COMPENSATION PLANS - Company's restricted stock award activities (Details) - Incentive plan 2017 - Restricted stock - USD ($)
$ / shares in Units, $ in Millions
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Share-Based Compensation Plans    
Shares of Restricted Stock, Non-vested beginning of period 69,090 71,808
Shares of Restricted Stock, Issued 54,855 27,700
Shares of Restricted Stock, Vested (30,255) (28,243)
Shares of Restricted Stock, Forfeited (725) (2,175)
Shares of Restricted Stock, Non-vested end of period 92,965 69,090
Weighted Average Grant Date Fair Value, Non-vested beginning of period (in dollars per share) $ 25.54 $ 24.67
Weighted Average Grant Date Fair Value, Issued (in dollars per share) 34.65 25.79
Weighted Average Grant Date Fair Value, Vested (in dollars per share) 24.86 23.6
Weighted Average Grant Date Fair Value, Forfeited (in dollars per share) 27.54 25.13
Weighted Average Grant Date Fair Value, Non-vested end of period (in dollars per share) $ 31.12 $ 25.54
Aggregate intrinsic value $ 3.5