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STOCK PLANS AND STOCK BASED COMPENSATION - ACTIVITY (Details) - USD ($)
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Information related to the stock option plan      
Total cash received from options exercised, net of shares redeemed $ (638,000) $ (2,000) $ 52,000
Information related to stock option and restricted stock awards granted      
Expenses 1,194,000 $ 1,322,000 $ 1,649,000
Estimated unrecognized stock option and restricted stock award expense related to unvested options and awards (net of estimated forfeitures)      
2025 1,695,000    
2026 1,134,000    
2027 82,000    
Total $ 2,911,000    
Employee Stock Option      
Weighted average assumptions used to determined fair value of stock options granted      
Risk-free interest rate (as a percent) 4.02% 3.86% 1.35%
Expected dividend yield (as a percent) 3.04% 3.19% 2.50%
Expected stock price volatility (as a percent) 27.62% 33.14% 32.12%
Expected life of options (in years) 3 years 6 months 4 years 4 years
Estimated fair value per share of options granted (in dollars per share) $ 9.64 $ 9.65 $ 10.41
Options      
Outstanding, beginning of year (in shares) 460,650 465,033  
Granted (in shares) 59,413 69,617  
Exercised (in shares) (223,252) (10,000)  
Forfeited or expired (in shares) (20,930) (64,000)  
Outstanding, end of year (in shares) 275,881 460,650 465,033
Unvested (in shares) 199,670    
Exercisable (vested) at end of year (in shares) 76,211    
Weighted Average Exercise Price      
Outstanding, beginning of year (in dollars per share) $ 38.37 $ 38.81  
Granted (in dollars per share) 49.25 42.74  
Exercised (in dollars per share) 36.24 46.08  
Forfeited or expired (in dollars per share) 42.03 45.09  
Outstanding, end of year (in dollars per share) 42.15 $ 38.37 $ 38.81
Unvested (in dollars per share) 41.15    
Exercisable (vested) at end of year (in dollars per share) $ 44.79    
Weighted Average Remaining Contractual Term (years)      
Outstanding, end of year 2 years 2 months 15 days 1 year 10 months 13 days  
Unvested 2 years 7 months 2 days    
Exercisable (vested) at end of year 1 year 2 months 12 days    
Aggregate Intrinsic Value      
Outstanding, end of year $ 7,646,215 $ 7,734,879  
Unvested 5,735,017    
Exercisable (vested) at end of year 1,911,198    
Information related to the stock option plan      
Total intrinsic value of options exercised 4,453,000 58,000 $ 57,000
Total cash received from options exercised, net of shares redeemed (638,000) (2,000) 52,000
Total tax benefit of options exercised 53,000 1,000 6,000
Information related to stock option and restricted stock awards granted      
Expenses 758,000 774,000 $ 560,000
Estimated unrecognized stock option and restricted stock award expense related to unvested options and awards (net of estimated forfeitures)      
2025 423,000    
2026 197,000    
2027 5,000    
Total 625,000    
Employee Stock Option | Non-executive officer employees | Related Party [Member]      
Information related to the stock option plan      
Outstanding loans $ 72,000 $ 129,000  
Restricted Stock Awards      
Shares      
Outstanding, beginning of year (in shares) 87,066 64,733  
Granted (in shares) 13,590 55,157  
Forfeited (in shares) (3,400) (1,470)  
Earned and issued (in shares) (29,454) (31,354)  
Outstanding, end of year (in shares) 67,802 87,066 64,733
Unvested and Expected to vest (in shares) 67,802    
Weighted-average grant date fair value      
Outstanding, beginning of year (in dollars per share) $ 43.37 $ 40.49  
Granted (in dollars per share) 58.88 43.6  
Forfeited (in dollars per share) 43.67 49.08  
Earned and issued (in dollars per share) 45.25 37.56  
Outstanding, end of year (in dollars per share) 45.65 $ 43.37 $ 40.49
Unvested and Expected to vest (in dollars per share) $ 45.65    
Other than option, Weighted-Average Remaining Contractual Term (years)      
Outstanding, end of year 1 year 9 months 1 year 11 months 23 days  
Information related to stock option and restricted stock awards granted      
Total fair value of shares vested $ 1,800,000 $ 1,500,000 $ 186,000
Expenses 291,000 $ 829,000 937,000
Estimated unrecognized stock option and restricted stock award expense related to unvested options and awards (net of estimated forfeitures)      
2025 1,272,000    
2026 937,000    
2027 77,000    
Total $ 2,286,000    
Restricted Stock Awards | Minimum      
Shares      
Unrecognized compensation expense recognition period 3 years    
Restricted Stock Awards | Maximum      
Shares      
Unrecognized compensation expense recognition period 6 years    
Performance Shares      
Shares      
Granted (in shares) 8,854 10,999  
Forfeited (in shares)   (10,999)  
Outstanding, end of year (in shares) 8,854    
Weighted-average grant date fair value      
Granted (in dollars per share) $ 49.25 $ 42.74  
Forfeited (in dollars per share)   $ 42.74  
Outstanding, end of year (in dollars per share) $ 49.25    
Information related to stock option and restricted stock awards granted      
Expenses $ 145,000 $ (281,000) $ 152,000