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STOCKHOLDERS' EQUITY - Activity of Equity Incentive Plans (Details) - USD ($)
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Restricted stock and RSU grants      
Restricted stock and RSU grants (based on grant price):      
Weighted average per share value of non-vested shares (in dollars per share) $ 25.90 $ 26.26 $ 25.04
Value of stock vested during the period $ 5,165,000 $ 5,535,000 $ 5,165,000
Weighted average per share value of shares forfeited during the period (in dollars per share) $ 27.52 $ 29.12 $ 24.62
Total charge to operations:      
Total charge to operations $ 5,367,000 $ 5,507,000 $ 5,433,000
Restricted stock grants      
Summary of the activity of the incentive Plans      
Average per share grant price (in dollars per share) $ 22.09 $ 33.75 $ 20.34
Deferred compensation to be recognized over vesting period $ 3,379,000 $ 5,183,000 $ 3,082,000
Number of non-vested shares:      
Non-vested beginning of period (in shares) 712,375 706,450 701,675
Number of shares awarded 152,955 153,575 151,500
Vested during period (in shares) (152,300) (146,900) (145,725)
Forfeitures (in shares) (470) (750) (1,000)
Non-vested end of period (in shares) 712,560 712,375 706,450
Total charge to operations:      
Total charge to operations $ 3,979,000 $ 4,057,000 $ 3,734,000
Total compensation costs related to non-vested awards that have not yet been recognized $ 7,627,000    
Weighted average vesting period 2 years 1 month 6 days    
Restricted stock units      
Summary of the activity of the incentive Plans      
Average per share grant price (in dollars per share) $ 20.32 $ 26.44 $ 30.46
Deferred compensation to be recognized over vesting period $ 958,000 $ 1,420,000 $ 1,808,000
Number of non-vested shares:      
Non-vested beginning of period (in shares) 241,076 230,752 223,802
Number of shares awarded 85,250 85,350 80,700
Vested during period (in shares) (74,988) (64,488) (73,750)
Forfeitures (in shares) (3,226) (10,538)  
Non-vested end of period (in shares) 248,112 241,076 230,752
Total charge to operations:      
Total charge to operations $ 1,388,000 $ 1,450,000 $ 1,699,000
Total compensation costs related to non-vested awards that have not yet been recognized $ 1,797,000    
Weighted average vesting period 1 year 6 months