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STOCK-BASED COMPENSATION (Tables) | 9 Months Ended
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Sep. 30, 2022
STOCK-BASED COMPENSATION |
Schedule of stock-based employee compensation expense | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Three months ended | ​ | Nine months ended
​ | ​ | September 30, | ​ | September 30,
(in thousands) |  | 2022 | ​ | 2021 |  | 2022 | ​ | 2021
Pre-tax expense | ​ | $ | 1,572 | ​ | $ | 1,471 | ​ | $ | 4,764 | ​ | $ | 4,481
After tax expense | ​ | $ | 1,145 | ​ | $ | 1,103 | ​ | $ | 3,554 | ​ | $ | 3,360
Schedule of summary of the changes in non-vested restricted shares | The following is a summary of the changes in non-vested restricted shares for the nine months ended September 30, 2022: ​
​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | Weighted Average
​ |  | Shares |  | Grant-Date Fair Value
Non-vested shares at January 1, 2022 | ​ | 2,619,691 | ​ | $ | 7.89
Granted |  | 1,254,276 |  | ​ | 6.72
Vested |  | (507,918) |  | ​ | 11.87
Forfeited |  | (93,931) |  | ​ | 6.31
Non-vested shares at September 30, 2022 |  | 3,272,118 | ​ | $ | 6.87
​

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