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STOCK-BASED COMPENSATION (Tables) | 3 Months Ended
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Mar. 31, 2022
STOCK-BASED COMPENSATION |
Schedule of stock-based employee compensation expense | ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Three months ended
​ | ​ | March 31,
(in thousands) |  | 2022 | ​ | 2021
Pre-tax expense | ​ | $ | 1,497 | ​ | $ | 1,539
After tax expense | ​ | $ | 1,130 | ​ | $ | 1,154
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 three months ended March 31, 2022: ​
​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | Weighted Average
​ |  | Shares |  | Grant-Date Fair Value
Non-vested shares at January 1, 2022 | ​ | 2,619,691 | ​ | $ | 7.89
Granted |  | 1,037,350 |  | ​ | 6.23
Vested |  | (490,313) |  | ​ | 11.91
Forfeited |  | (31,925) |  | ​ | 6.49
Non-vested shares at March 31, 2022 |  | 3,134,803 | ​ | $ | 6.73
​

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