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SHARE-BASED COMPENSATION (Tables) | 12 Months Ended
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Dec. 31, 2017
SHARE-BASED COMPENSATION [Abstract] |
Changes in Restricted Stock | Changes in restricted stock for the twelve months ended December 31, 2017 were as follows:
|  | Number of Shares |  |  | Weighted Average Grant Price |
Non-vested at December 31, 2016 |  |  | 143,380 |  |  | $ | 26.76 |
Granted |  |  | 18,672 |  |  | $ | 34.07 |
Forfeited |  |  | (298 | ) |  | $ | 59.60 |
Vested |  |  | (83,853 | ) |  | $ | 24.92 |
Non-vested at December 31, 2017 |  |  | 77,901 |  |  | $ | 30.36 |
Changes in restricted stock for the twelve months ended December 31, 2016 were as follows:
|  | Number of Shares |  |  | Weighted Average Grant Price |
Non-vested at December 31, 2015 |  |  | 137,507 |  |  | $ | 54.58 |
Granted |  |  | 108,553 |  |  | $ | 17.07 |
Forfeited |  |  | (39,000 | ) |  | $ | 65.41 |
Vested |  |  | (63,680 | ) |  | $ | 46.65 |
Non-vested at December 31, 2016 |  |  | 143,380 |  |  | $ | 26.76 |
Changes in restricted stock for the twelve months ended December 31, 2015 were as follows:
|  | Number of Shares |  |  | Weighted Average Grant Price |
Non-vested at December 31, 2014 |  |  | 179,942 |  |  | $ | 52.71 |
Granted |  |  | 35,821 |  |  | $ | 40.95 |
Forfeited |  |  | (20,855 | ) |  | $ | 41.34 |
Vested |  |  | (57,401 | ) |  | $ | 44.99 |
Non-vested at December 31, 2015 |  |  | 137,507 |  |  | $ | 54.58 |

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- Definition Tabular disclosure of the change in restricted stock units (RSUs). + References No definition available. + Details
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