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STOCKHOLDERS' EQUITY - Activity of the Plans (Details) - USD ($) | 3 Months Ended | 6 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | --- | ---
Sep. 30, 2024 | Sep. 30, 2023 | Jun. 30, 2023 | Sep. 30, 2024 | Sep. 30, 2023 | Jun. 30, 2024 | Dec. 31, 2023
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) | $ 24.88 | $ 25.91 |  | $ 24.88 | $ 25.91 |  |
Value of stock vested during the period |  |  |  | $ 4,723,000 | $ 5,165,000 |  |
Weighted average per share value of shares forfeited during the period (in dollars per share) | $ 0 | $ 25.85 |  | $ 30.46 | $ 25.47 |  |
Total charge to operations: |  |  |  |  |  |  |
Total charge to operations | $ 1,248,000 | $ 1,211,000 |  | $ 3,687,000 | $ 4,103,000 |  |
Restricted stock |  |  |  |  |  |  |
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 |  |
Number of non-vested shares: |  |  |  |  |  |  |
Non-vested beginning of period (in shares) | 727,140 | 712,920 | 712,375 | 712,560 | 712,375 | 712,920 | 712,375
Number of shares granted |  |  |  | 151,180 | 152,955 |  |
Vested during period (in shares) |  |  |  | (136,600) | (152,300) |  |
Forfeitures (in shares) |  | (260) |  |  | (370) |  |
Non-vested end of period (in shares) | 727,140 | 712,660 | 712,920 | 727,140 | 712,660 | 727,140 | 712,560
Total charge to operations: |  |  |  |  |  |  |
Total charge to operations | $ 921,000 | $ 923,000 |  | $ 2,734,000 | $ 3,051,000 |  |
Weighted average vesting period |  |  |  | 2 years 3 months 18 days |  |  |
Restricted stock | General and administrative expense |  |  |  |  |  |  |
Total charge to operations: |  |  |  |  |  |  |
Total compensation costs related to non-vested awards that have not yet been recognized | $ 8,158,000 |  |  | $ 8,158,000 |  |  |
RSU grants |  |  |  |  |  |  |
Summary of the activity of the incentive Plans |  |  |  |  |  |  |
Average per share grant price (in dollars per share) | $ 25.60 | $ 20.32 |  | $ 25.60 | $ 20.32 |  |
Deferred compensation to be recognized over vesting period | $ 1,167,000 | $ 979,000 |  | $ 1,167,000 | $ 979,000 |  |
Number of non-vested shares: |  |  |  |  |  |  |
Non-vested beginning of period (in shares) | 168,490 | 166,050 | 241,076 | 248,112 | 241,076 | 166,050 | 241,076
Number of shares granted | 88,250 | 85,250 |  | 88,250 | 85,250 |  |
Vested during period (in shares) |  |  |  | (39,811) | (74,988) |  |
Forfeitures (in shares) |  |  |  | (39,811) | (38) |  |
Non-vested end of period (in shares) | 256,740 | 251,300 | 166,050 | 256,740 | 251,300 | 168,490 | 248,112
Total charge to operations: |  |  |  |  |  |  |
Total charge to operations | $ 327,000 | $ 288,000 |  | $ 953,000 | $ 1,052,000 |  |
Weighted average vesting period |  |  |  | 1 year 9 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 | $ 1,957,000 |  |  | $ 1,957,000 |  |  |

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