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STOCK-BASED COMPENSATION (Tables) | 3 Months Ended
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Mar. 31, 2020
STOCK-BASED COMPENSATION |
Schedule of stock-based compensation | Restricted Stock
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Three months ended March 31,
(in thousands) |  | 2020 |  | 2019
Pre – tax cost | ​ | $ | 576 | ​ | $ | 538
After tax cost | ​ | $ | 449 | ​ | $ | 420
Schedule of summary of the changes in non-vested restricted shares | ​
​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | Weighted
​ | ​ | ​ | ​ | Average
​ | ​ | ​ | ​ | Grant-Date
​ |  | Shares |  | Fair Value
Non-vested shares at December 31, 2019 |  | 815,540 | ​ | $ | 11.29
Granted |  | 179,000 | ​ |  | 4.59
Vested |  | (223,270) | ​ |  | 9.05
Forfeited |  | (3,500) | ​ |  | 8.61
Non-vested shares at March 31, 2020 |  | 767,770 | ​ | $ | 11.77

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