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SHAREHOLDERS' EQUITY (Tables) | 12 Months Ended
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Dec. 31, 2018
Stockholders' Equity Note [Abstract] |
Schedule of Weighted-Average Assumptions Used To Estimate the Fair Value of Options Granted | The following table presents the weighted-average assumptions used to estimate the fair value of options granted in 2018, 2017 and 2016:
| 2018 |  | 2017 |  | 2016
Expected annual dividend yield | 1.4 | % |  | 2.4 | % |  | — | %
Risk-free interest rate | 2.94 | % |  | 2.26 | % |  | 1.64 | %
Expected volatility | 48.0 | % |  | 48.9 | % |  | 44.4 | %
Expected life in years | 5.2 |  |  | 4.0 |  |  | 7.1 |
Schedule of Outstanding and Exercisable Options | The following table summarizes information concerning outstanding and exercisable options:
| Weighted Average
| 2018 |  | 2017 |  | 2016
| Shares |  | Weighted Avg. Exercise Price |  | Shares |  | Weighted Avg. Exercise Price |  | Shares |  | Weighted Avg. Exercise Price
Outstanding at beginning of year | 1,001,300 |  |  | $ | 11.58 |  |  | 1,410,250 |  |  | $ | 12.57 |  |  | 954,625 |  |  | $ | 15.98 |
Granted | 17,550 |  |  | $ | 31.66 |  |  | 10,000 |  |  | $ | 24.36 |  |  | 670,000 |  |  | $ | 8.43 |
Exercised | (400,203 | ) |  | $ | 12.18 |  |  | (138,450 | ) |  | $ | 13.49 |  |  | 0 |  |  | $ | 0.00 |
Canceled or expired | (22,499 | ) |  | $ | 15.24 |  |  | (280,500 | ) |  | $ | 16.04 |  |  | (214,375 | ) |  | $ | 14.86 |
Outstanding at end of year | 596,148 |  |  | $ | 11.64 |  |  | 1,001,300 |  |  | $ | 11.58 |  |  | 1,410,250 |  |  | $ | 12.57 |
Options exercisable at year end | 341,515 |  |  |  |  |  | 588,802 |  |  |  |  |  | 750,250 |  |  |  |
Weighted average fair value per option granted during the year | $ | 12.87 |  |  |  |  |  | $ | 10.69 |  |  |  |  |  | $ | 3.94 |  |  |  |
Schedule of Options Vested and Exercisable or Nonvested, Expected to Vest (Nonvested Outstanding Less Expected Forfeitures) | The following table summarizes information about options vested and exercisable or nonvested that are expected to vest (nonvested outstanding less expected forfeitures) at December 31, 2018:
Range of Exercise Prices |  | Number Exercisable |  | Weighted Average Exercise Price |  | Weighted Average Remaining Contractual Life |  | Aggregate Intrinsic Value (in millions)
$ | 5.00 |  | to | $ | 10.00 |  |  | 366,043 |  |  | $ | 8.54 |  |  | 7.52 |  | $ | 5.5 |
$ | 10.01 |  | to | $ | 15.00 |  |  | 126,250 |  |  | $ | 13.57 |  |  | 2.05 |  | 1.3 |
$ | 15.01 |  | to | $ | 20.00 |  |  | 79,348 |  |  | $ | 18.73 |  |  | 3.17 |  | 0.4 |
$ | 20.01 |  | to | $ | 25.00 |  |  | 0 |  |  | $ | 0.00 |  |  | 0 |  | 0.0 |
$ | 25.01 |  | to | $ | 30.00 |  |  | 0 |  |  | $ | 0.00 |  |  | 0 |  | $ | 0.0 |
$ | 30.01 |  | to | $ | 31.66 |  |  | 17,550 |  |  | $ | 31.66 |  |  | 9.77 |  | $ | 0.0 |
$ | 5.00 |  | to | $ | 31.66 |  |  | 589,191 |  |  | $ | 11.68 |  |  | 5.83 |  | $ | 7.2 |
Schedule of Unvested Stock Options | The following table reflects the activity for all unvested stock options during 2018:
| Shares |  | Weighted Average Grant- Date Fair Value
Unvested at January 1, 2018 | 412,498 |  |  | $ | 4.93 |
Granted | 17,550 |  |  | $ | 12.87 |
Vested | (152,916 | ) |  | $ | 7.52 |
Forfeited | (22,499 | ) |  | $ | 12.28 |
Unvested at December 31, 2018 | 254,633 |  |  | $ | 4.73 |
Schedule of Repurchase Agreements | Details of the purchase is as follows:
Fiscal Month |  | Total Number of Shares Purchased |  | Average Price Paid Per Share |  | Total Number of Shares Purchased as Part of Publicly Announced Plans or Programs |  | Maximum Number of Shares that May Yet Be Purchased Under the Plans or Programs
July |  | 232,550 |  | 38.96 |  | 232,550 |  | 1,767,450
Nonvested Restricted Stock Shares Activity | The following table reflects the activity for all unvested restricted stock during 2018:
| Shares |  | Weighted Average Grant- Date Fair Value
Unvested at January 1, 2018 | 240.867 |  |  | 16.22 |
Granted | 8.894 |  |  | 13.49 |
Vested | (117.277 | ) |  | 19.55 |
Unvested at December 31, 2018 | 132.484 |  |  | 14.31 |

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