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STOCKHOLDERS' EQUITY - Stock Based Compensation - RSU metrics (Details) - USD ($) | 12 Months Ended
--- | ---
Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Valuation assumptions |  |  |  |  |
Accrual for dividend equivalent rights | $ 450,000 | $ 210,000 |  |  |
Restricted stock units |  |  |  |  |
Valuation assumptions |  |  |  |  |
Performance cycle | 3 years | 3 years | 3 years | 3 years | 3 years
ROC Awards |  |  |  |  |
Valuation assumptions |  |  |  |  |
Performance cycle | 3 years |  |  |  |
TSR awards |  |  |  |  |
STOCKHOLDERS' EQUITY |  |  |  |  |
Service period | 3 years |  |  |  |
Awards Granted in 2019 - 2020 | ROC Awards |  |  |  |  |
STOCKHOLDERS' EQUITY |  |  |  |  |
Weight | 50.00% |  |  |  |
Awards Granted in 2019 - 2020 | ROC Awards | Minimum |  |  |  |  |
STOCKHOLDERS' EQUITY |  |  |  |  |
Average of annual ROC | 7.00% |  |  |  |
Awards Granted in 2019 - 2020 | ROC Awards | Maximum |  |  |  |  |
STOCKHOLDERS' EQUITY |  |  |  |  |
Average of annual ROC | 9.75% |  |  |  |
Awards Granted in 2019 - 2020 | TSR awards |  |  |  |  |
STOCKHOLDERS' EQUITY |  |  |  |  |
Weight | 50.00% |  |  |  |
Awards Granted in 2019 - 2020 | TSR awards | Minimum |  |  |  |  |
STOCKHOLDERS' EQUITY |  |  |  |  |
Average of annual TSR | 7.00% |  |  |  |
Awards Granted in 2019 - 2020 | TSR awards | Maximum |  |  |  |  |
STOCKHOLDERS' EQUITY |  |  |  |  |
Average of annual TSR | 12.00% |  |  |  |
Awards granted in 2021 - 2023 | ROC Awards |  |  |  |  |
STOCKHOLDERS' EQUITY |  |  |  |  |
Weight | 50.00% |  |  |  |
Awards granted in 2021 - 2023 | ROC Awards | Minimum |  |  |  |  |
STOCKHOLDERS' EQUITY |  |  |  |  |
Average of annual ROC | 6.00% |  |  |  |
Awards granted in 2021 - 2023 | ROC Awards | Maximum |  |  |  |  |
STOCKHOLDERS' EQUITY |  |  |  |  |
Average of annual ROC | 8.75% |  |  |  |
Awards granted in 2021 - 2023 | TSR awards |  |  |  |  |
STOCKHOLDERS' EQUITY |  |  |  |  |
Weight | 50.00% |  |  |  |
Awards granted in 2021 - 2023 | TSR awards | Minimum |  |  |  |  |
STOCKHOLDERS' EQUITY |  |  |  |  |
Average of annual TSR | 6.00% |  |  |  |
Awards granted in 2021 - 2023 | TSR awards | Maximum |  |  |  |  |
STOCKHOLDERS' EQUITY |  |  |  |  |
Average of annual TSR | 11.00% |  |  |  |
Awards granted in 2023 |  |  |  |  |
Valuation assumptions |  |  |  |  |
Aggregate fair value of the shares granted | $ 958,000 |  |  |  |
Awards granted in 2023 | TSR awards |  |  |  |  |
Valuation assumptions |  |  |  |  |
Expected life | 3 years |  |  |  |
Dividend rate | 8.72% |  |  |  |
Risk-free interest rate minimum | 4.42% |  |  |  |
Risk-free interest rate maximum | 5.28% |  |  |  |
Expected price volatility minimum | 28.69% |  |  |  |
Expected price volatility maximum | 30.05% |  |  |  |
Awards granted in 2022 |  |  |  |  |
Valuation assumptions |  |  |  |  |
Aggregate fair value of the shares granted | $ 1,371,000 |  |  |  |
Awards granted in 2022 | TSR awards |  |  |  |  |
Valuation assumptions |  |  |  |  |
Expected life | 3 years |  |  |  |
Dividend rate | 7.10% |  |  |  |
Risk-free interest rate minimum | 1.58% |  |  |  |
Risk-free interest rate maximum | 3.33% |  |  |  |
Expected price volatility minimum | 29.37% |  |  |  |
Expected price volatility maximum | 39.87% |  |  |  |
Awards granted in 2021 |  |  |  |  |
Valuation assumptions |  |  |  |  |
Aggregate fair value of the shares granted | $ 1,822,000 |  |  |  |
Awards granted in 2021 | TSR awards |  |  |  |  |
Valuation assumptions |  |  |  |  |
Expected life | 3 years |  |  |  |
Dividend rate | 5.91% |  |  |  |
Risk-free interest rate minimum | 0.03% |  |  |  |
Risk-free interest rate maximum | 0.35% |  |  |  |
Expected price volatility minimum | 26.74% |  |  |  |
Expected price volatility maximum | 41.53% |  |  |  |

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- Definition The estimated measure of the maximum percentage by which a share price is expected to fluctuate during a period. Volatility also may be defined as a probability-weighted measure of the dispersion of returns about the mean. The volatility of a share price is the standard deviation of the continuously compounded rates of return on the share over a specified period. That is the same as the standard deviation of the differences in the natural logarithms of the stock prices plus dividends, if any, over the period. + References No definition available. + Details
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