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STOCK-BASED COMPENSATION (Tables) | 12 Months Ended
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Dec. 31, 2022
STOCK-BASED COMPENSATION. |
Summary of stock option activity | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | Weighted Average | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | Remaining | ​ | Aggregate | ​
​ | ​ | ​ | ​ | Exercise | ​ | Contractual | ​ | Intrinsic | ​
Stock Options |  | Shares |  | Price |  | Term |  | Value |
Stock Option Shares outstanding at beginning of period |  | 1,999,699 |  | $ | 42.05 |  | — | ​ |  | — | ​
Stock Option Shares granted |  | 319,286 | ​ |  | 70.58 |  | — | ​ |  | — | ​
Stock Option Shares exercised |  | (612,952) | ​ |  | 30.75 |  | — | ​ |  | — | ​
Stock Option Shares forfeited |  | (116,663) | ​ |  | 55.68 |  | — | ​ |  | — | ​
Stock Option Shares expired | ​ | — | ​ | ​ | — | ​ | — | ​ |  | — | ​
Stock Option Shares outstanding at end of period |  | 1,589,370 |  | ​ | 51.12 |  | 7.0 | yrs. | $ | 41,253,691 | ​
Stock Option Shares exercisable at end of period |  | 681,377 |  | $ | 33.74 |  | 4.7 | yrs. | $ | 29,400,864 | ​
​
Summary of status of nonvested shares | ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | Weighted-Average | ​
​ | ​ | ​ | ​ | Grant Date Fair | ​
Nonvested Stock Option Shares |  | Shares |  | Value |
Nonvested at January 1, 2022 |  | 971,324 |  | $ | 19.62 | ​
Granted |  | 319,286 | ​ |  | 31.86 | ​
Vested |  | (265,954) | ​ |  | 12.98 | ​
Forfeited |  | (116,663) | ​ |  | 19.89 | ​
Nonvested at December 31, 2022 |  | 907,993 |  | $ | 25.75 | ​
​
Schedule of stock options granted, vested and exercised | ​ ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Year ended December 31, | ​ | ​
​ |  | 2022 |  | 2021 |  | 2020 |  | ​
Weighted average expected volatility for options granted | ​ |  | 48.54 | % |  | 45.72 | % |  | 40.87 | % | ​
Expected life (in years) | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Directors’ plan | ​ |  | 4.15 | ​ |  | 3.90 | ​ |  | 3.26 | ​ | ​
Executives plan | ​ |  | 5.63 | ​ |  | 5.38 | ​ |  | 5.22 | ​ | ​
Employees plan | ​ |  | 4.22 | ​ |  | 4.20 | ​ |  | 4.13 | ​ | ​
Weighted average risk-free rate | ​ |  | 3.62 | % |  | 0.93 | % |  | 0.48 | % | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Weighted average grant date fair value per share of options granted |  | $ | 31.86 |  | $ | 26.37 |  | $ | 17.33 | ​ | ​
Total fair value of shares vested |  | $ | 3,452 |  | $ | 5,389 |  | $ | 3,852 | ​ | ​
Total intrinsic value of options exercised |  | $ | 28,156 |  | $ | 16,028 |  | $ | 15,258 | ​ | ​
Cash received for all stock option exercises |  | $ | 18,846 |  | $ | 10,435 |  | $ | 7,813 | ​ | ​
Tax benefit realized from stock awards exercised |  | $ | 5,913 |  | $ | 3,366 |  | $ | 3,204 | ​ | ​
Schedule of stock-based compensation expense | Reported stock-based compensation expense was classified as follows (in thousands) and it is included in the Operating expenses in the Consolidated Statement of Income: ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | For the Year ended December 31, | ​
​ |  | 2022 |  | 2021 |  | 2020 |
Casino |  | $ | 273 |  | $ | 236 |  | $ | 168 | ​
Food and beverage | ​ |  | 142 | ​ |  | 125 | ​ |  | (26) | ​
Hotel | ​ |  | 214 | ​ |  | 191 | ​ |  | 127 | ​
Selling, general and administrative | ​ |  | 4,466 | ​ |  | 3,508 | ​ |  | 3,586 | ​
Total stock-based compensation, before taxes | ​ |  | 5,095 | ​ |  | 4,060 | ​ |  | 3,855 | ​
Tax benefit | ​ |  | (1,070) | ​ |  | (853) | ​ |  | (810) | ​
Total stock-based compensation, net of tax |  | $ | 4,025 |  | $ | 3,207 |  | $ | 3,045 | ​

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