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STOCK-BASED COMPENSATION (Tables) | 9 Months Ended
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Sep. 30, 2023
STOCK-BASED COMPENSATION |
Schedule of stock-based employee compensation expense | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Three months ended | ​ | Nine months ended
​ | ​ | September 30, | ​ | September 30,
(in thousands) |  | 2023 | ​ | 2022 |  | 2023 | ​ | 2022
Pre-tax expense | ​ | $ | 1,915 | ​ | $ | 1,572 | ​ | $ | 6,033 | ​ | $ | 4,764
After tax expense | ​ | $ | 1,320 | ​ | $ | 1,145 | ​ | $ | 4,446 | ​ | $ | 3,554
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, 2023: ​
​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | Weighted Average
​ |  | Shares |  | Grant-Date Fair Value
Non-vested shares at January 1, 2023 | ​ | 3,248,728 | ​ | $ | 6.87
Granted |  | 1,235,728 |  | ​ | 9.50
Vested |  | (858,425) |  | ​ | 8.60
Forfeited |  | (91,186) |  | ​ | 7.71
Non-vested shares at September 30, 2023 |  | 3,534,845 | ​ | $ | 7.35
​

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