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STOCKHOLDERS' EQUITY - Activity of the Plans (Details) - USD ($)
 3 Months Ended 12 Months Ended
Mar. 31, 2024
Mar. 31, 2023
Mar. 31, 2024
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) $ 25.27 $ 25.74 $ 25.27
Value of stock vested during the period $ 3,511,000 $ 3,412,000  
Weighted average per share value of shares forfeited during the period (in dollars per share) $ 0 $ 0  
Total charge to operations:      
Total charge to operations $ 1,272,000 $ 1,328,000  
Restricted stock grants      
Summary of the activity of the incentive Plans      
Average per share grant price (in dollars per share) $ 21.60 $ 22.09  
Deferred compensation to be recognized over vesting period $ 3,265,000 $ 3,379,000 $ 3,265,000
Number of non-vested shares:      
Non-vested beginning of period (in shares) 712,560 712,375 730,530
Number of shares granted 151,180 152,955  
Vested during period (in shares) (136,600) (134,800)  
Non-vested end of period (in shares) 727,140 730,530 727,140
Total charge to operations:      
Total charge to operations $ 893,000 $ 950,000  
Weighted average vesting period 2 years 9 months 18 days    
Restricted stock grants | General and administrative expense      
Total charge to operations:      
Total compensation costs related to non-vested awards that have not yet been recognized $ 10,000,000   $ 10,000,000
RSU grants      
Summary of the activity of the incentive Plans      
Average per share grant price (in dollars per share) $ 0 $ 0  
Deferred compensation to be recognized over vesting period $ 0 $ 0 $ 0
Number of non-vested shares:      
Non-vested beginning of period (in shares) 248,112 241,076 241,076
Number of shares granted 0 0  
Vested during period (in shares) 0 0  
Forfeitures (in shares) 0 0  
Non-vested end of period (in shares) 248,112 241,076 248,112
Total charge to operations:      
Total charge to operations $ 379,000 $ 378,000  
Weighted average vesting period 1 year 3 months 18 days    
RSU grants | General and administrative expense      
Total charge to operations:      
Total compensation costs related to non-vested awards that have not yet been recognized $ 1,467,000   $ 1,467,000