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SHARE-BASED COMPENSATION (Tables) | 12 Months Ended
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Dec. 31, 2017
Disclosure of Compensation Related Costs, Share-based Payments [Abstract] |
Summary of the effects of share-based compensation to options and awards granted under the Company's equity incentive plans | The following table summarizes the effects of share-based compensation for options and awards granted under the Company's equity incentive plans for each of the periods presented:
| Year Ended December 31,
| 2017 |  | 2016 |  | 2015
| (Dollars in thousands)
Salaries and employee benefits | $ | 3,266 |  |  | $ | 3,094 |  |  | $ | 4,181 |
Directors stock awards | 150 |  |  | 97 |  |  | 78 |
Income tax benefit | (1,903 | ) |  | (1,269 | ) |  | (1,694 | )
Net share-based compensation effect | $ | 1,513 |  |  | $ | 1,922 |  |  | $ | 2,565 |
Summary of option activity for stock option plans | The following is a summary of option activity for our stock option plans for the year ended December 31, 2017:
| Number of Units |  | Weighted Average Exercise Price |  | Weighted Average Remaining Contractual Term (in years) |  | Aggregate Intrinsic Value (in thousands)
Stock options outstanding as of January 1, 2017 | 162,063 |  |  | $ | 24.95 |  |  |  |  |
Changes during the year: |  |  |  |  |  |  |  |  |
Granted | — |  |  | — |  |  |  |  |
Exercised | — |  |  | — |  |  |  |  |
Expired | (1,175 | ) |  | 706.54 |  |  |  |  |
Forfeited | (629 | ) |  | 210.50 |  |  |  |  |
Stock options outstanding as of December 31, 2017 | 160,259 |  |  | $ | 19.22 |  |  | 4.2 |  | $ | 2,410 |
Vested and exercisable as of December 31, 2017 | 160,259 |  |  | $ | 19.22 |  |  | 4.2 |  | $ | 2,410 |
Schedule of activity of restricted stock awards and units | The table below presents the activity of restricted stock awards and units for each of the periods presented:
| Number of Units |  | Weighted Average Grant Date Fair Value |  | Fair Value of Restricted Stock Awards and Units That Vested During The Year (in thousands)
Unvested as of December 31, 2014 | 715,460 |  |  | $ | 15.77 |  |  |
Changes during the year: |  |  |  |  |
Granted | 173,897 |  |  | 19.50 |  |  |
Forfeited | (82,373 | ) |  | 16.73 |  |  |
Vested | (343,067 | ) |  | 15.21 |  |  | $ | 7,888 |
Unvested as of December 31, 2015 | 463,917 |  |  | 17.41 |  |  |
Changes during the year: |  |  |  |  |
Granted | 296,078 |  |  | 23.65 |  |  |
Forfeited | (66,972 | ) |  | 20.97 |  |  |
Vested | (255,326 | ) |  | 15.83 |  |  | 5,806 |
Unvested as of December 31, 2016 | 437,697 |  |  | 22.01 |  |  |
Changes during the year: |  |  |  |  |  |  |
Granted | 126,204 |  |  | 31.35 |  |  |
Forfeited | (31,570 | ) |  | 24.89 |  |  |
Vested | (134,780 | ) |  | 19.81 |  |  | 4,224 |
Unvested as of December 31, 2017 | 397,551 |  |  | 25.49 |  |  |

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