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STOCK-BASED COMPENSATION (Tables) | 3 Months Ended
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Mar. 31, 2023
STOCK-BASED COMPENSATION |
Schedule of recognized stock-based compensation expense | We recognized stock-based compensation expense as follows (amounts in thousands): ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Three Months Ended
​ | ​ | March 31, | ​ | March 31,
​ |  | 2023 |  | 2022
Restricted stock | ​ | $ | 1,614 | ​ | $ | 1,155
Performance stock | ​ | ​ | 810 | ​ | ​ | 631
Stock appreciation rights | ​ | ​ | 205 | ​ | ​ | 332
Stock options | ​ | ​ | 7 | ​ | ​ | 6
Total stock-based compensation expense | ​ | $ | 2,636 | ​ | $ | 2,124
​
Schedule of stock-based compensation awards | ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | Three Months Ended
​ | ​ | ​ | March 31, | ​ | ​ | March 31,
​ |  | ​ | 2023 |  | 2022
​ | ​ | ​ | (Number of shares)
Performance stock (at maximum 200% attainment) | ​ | ​ | 82,360 | ​ | ​ | 39,380
Restricted stock | ​ | ​ | 56,530 | ​ | ​ | 28,220
Total equity awards granted | ​ | ​ | 138,890 | ​ | ​ | 67,600
​
Schedule of unrecognized compensation expense | As of March 31, 2023, unrecognized compensation expense (expressed in thousands below) and weighted-average vesting period for each of our stock-based compensation awards were as follows: ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Unrecognized |  | Weighted-
​ | ​ | compensation | ​ | average vesting
​ | ​ | expense |  | period (years)
Restricted stock | ​ | $ | 11,230 | ​ | ​ | 2.3
Performance stock | ​ | ​ | 8,893 | ​ | ​ | 2.3
Stock appreciation rights | ​ | ​ | 312 | ​ | ​ | 0.4
Stock options | ​ | ​ | 11 | ​ | ​ | 0.4

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