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EQUITY (Tables) | 12 Months Ended
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Dec. 31, 2022
EQUITY |
Schedule of shares repurchased | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Shares | ​ | Aggregate Cost | ​ | Average | ​
Year ended December 31, |  | Repurchased |  | (in thousands) |  | Repurchase Price |
2022 |  | 23,714 | ​ | $ | 941,523 | ​ | $ | 39.70 | ​
2021 |  | 244,798 | ​ | ​ | 10,546 | ​ | ​ | 43.08 | ​
2020 |  | 129,273 | ​ | ​ | 6,589 | ​ | ​ | 50.97 | ​
Schedule of repurchases of shares from employees to satisfy tax withholding and stock exercise obligations | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Shares | ​ | Aggregate Cost | ​ | Average | ​
Year ended December 31, |  | Repurchased |  | (in thousands) |  | Repurchase Price | ​
2022 |  | 33,401 | ​ | $ | 1,169 | ​ | $ | 35.01 | ​
2021 |  | 33,271 | ​ | ​ | 1,713 | ​ | ​ | 51.49 | ​
2020 |  | 32,227 | ​ | ​ | 1,733 | ​ | ​ | 53.78 | ​
Summary of stock option activity | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Year Ended December 31, 2022 | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | Weighted Average | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | Remaining | ​ | ​ | ​ | ​
​ | ​ | Number of | ​ | Weighted Avg. | ​ | Contractual | ​ | Aggregate | ​
​ |  | Options |  | Exercise Price |  | Term (Years) |  | Intrinsic Value |
Outstanding at January 1, 2022 |  | 5,000 | ​ | $ | 71.43 | ​ | ​ | ​ | ​ | ​ | ​
Granted | ​ | — | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | ​
Forfeited |  | — | ​ |  | — | ​ | ​ | ​ | ​ | ​ | ​
Expired |  | (5,000) | ​ |  | — | ​ | ​ | ​ | ​ | ​ | ​
Exercised |  | — | ​ |  | — | ​ | ​ | ​ | ​ | ​ | ​
Outstanding at December 31, 2022 |  | — | ​ | ​ | — | ​ | — | ​ | $ | — | ​
Vested and expected to vest at December 31, 2022 |  | — | ​ | ​ | — | ​ | — | ​ | $ | — | ​
Exercisable at December 31, 2022 |  | — | ​ | ​ | — | ​ | — | ​ | $ | — | ​
​ ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Year Ended December 31, 2021 | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | Weighted Average | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | Remaining | ​ | ​ | ​ | ​
​ | ​ | Number of | ​ | Weighted Avg. | ​ | Contractual | ​ | Aggregate | ​
​ |  | Options |  | Exercise Price |  | Term (Years) |  | Intrinsic Value |
Outstanding at January 1, 2021 |  | 15,000 | ​ | $ | 49.34 | ​ | ​ | ​ | ​ | ​ | ​
Granted | ​ | — | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | ​
Forfeited |  | — | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | ​
Expired |  | — | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | ​
Exercised |  | (10,000) | ​ | ​ | 38.30 | ​ | ​ | ​ | ​ | ​ | ​
Outstanding at December 31, 2021 |  | 5,000 | ​ | ​ | 71.43 | ​ | 3.7 | ​ | $ | — | ​
Vested and expected to vest at December 31, 2021 |  | 5,000 | ​ | ​ | 71.43 | ​ | 3.7 | ​ | $ | — | ​
Summary of information relating to options granted and exercised | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Year Ended December 31, 2021 | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | Weighted Average | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | Remaining | ​ | ​ | ​ | ​
​ | ​ | Number of | ​ | Weighted Avg. | ​ | Contractual | ​ | Aggregate | ​
​ |  | Options |  | Exercise Price |  | Term (Years) |  | Intrinsic Value |
Outstanding at January 1, 2021 |  | 15,000 | ​ | $ | 49.34 | ​ | ​ | ​ | ​ | ​ | ​
Granted | ​ | — | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | ​
Forfeited |  | — | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | ​
Expired |  | — | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | ​
Exercised |  | (10,000) | ​ | ​ | 38.30 | ​ | ​ | ​ | ​ | ​ | ​
Outstanding at December 31, 2021 |  | 5,000 | ​ | ​ | 71.43 | ​ | 3.7 | ​ | $ | — | ​
Vested and expected to vest at December 31, 2021 |  | 5,000 | ​ | ​ | 71.43 | ​ | 3.7 | ​ | $ | — | ​
Summary of restricted stock activity | The following table summarizes restricted stock activity during the year ended December 31, 2022 and 2021:
​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | ​ | ​ | Weighted Avg. | ​
​ |  | Shares |  | Fair Value |
Unvested as of January 1, 2022 |  | 228,068 | ​ | $ | 51.05 | ​
Granted |  | 152,430 | ​ | ​ | 38.59 | ​
Forfeited |  | (12,486) | ​ | ​ | 46.52 | ​
Vested and issued |  | (107,515) | ​ | ​ | 51.33 | ​
Unvested as of December 31, 2022 |  | 260,497 | ​ | $ | 43.86 | ​
​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | ​ | ​ | Weighted Avg. | ​
​ |  | Shares |  | Fair Value |
Unvested as of January 1, 2021 |  | 223,623 | ​ | $ | 54.42 | ​
Granted |  | 117,794 | ​ |  | 48.76 | ​
Forfeited |  | (14,213) | ​ |  | 50.86 | ​
Vested and issued |  | (99,136) | ​ |  | 55.95 | ​
Unvested as of December 31, 2021 |  | 228,068 | ​ | $ | 51.05 | ​
Schedule of performance stock activity | ​
​ | ​ | ​ | ​ | ​ | ​
​ |  | ​ | ​ | Weighted Avg.
​ |  | Shares |  | Fair Value
Unvested as of January 1, 2022 |  | 43,000 | ​ | $ | 59.77
Granted |  | 56,450 | ​ | ​ | 47.03
Forfeited |  | — | ​ | ​ | —
Vested and issued |  | — | ​ | ​ | —
Unvested as of December 31, 2022 |  | 99,450 | ​ | $ | 52.54
​
​ | ​ | ​ | ​ | ​ | ​
​ |  | ​ | ​ | Weighted Avg.
​ |  | Shares |  | Fair Value
Unvested as of January 1, 2021 |  | — | ​ | $ | —
Granted |  | 43,000 | ​ | ​ | 59.77
Forfeited |  | — | ​ | ​ | —
Vested and issued |  | — | ​ | ​ | —
Unvested as of December 31, 2021 |  | 43,000 | ​ | $ | 59.77

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