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Share-Based Compensation (Tables) | 12 Months Ended
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Dec. 31, 2015
Disclosure of Compensation Related Costs, Share-based Payments [Abstract] |
Summary of recognized stock-based compensation expense | The following table summarizes share-based compensation expense recognized:
|  | Years ended December 31, |
|  | 2015 |  |  | 2014 |  |  | 2013 |
Restricted stock units |  | $ | 3,705 |  |  | $ | 2,261 |  |  | $ | 510 |
Phantom stock units |  |  | 141 |  |  |  | 131 |  |  |  | 108 |
Stock options |  |  | - |  |  |  | - |  |  |  | 18 |
Total |  | $ | 3,846 |  |  | $ | 2,392 |  |  | $ | 636 |
Schedule of unrecognized compensation cost, nonvested awards | The following table summarizes unrecognized compensation cost and the weighted average remaining amortization periods at December 31, 2015 (amortization periods in years):
|  | Unrecognized Compensation Cost |  |  | Weighted Average Remaining Amortization Periods |
Restricted stock units |  | $ | 7,479 |  |  |  | 1.0 |
Phantom stock units |  |  | - |  |  |  | 0.0 |
Stock options |  |  | - |  |  |  | 0.0 |
Total |  | $ | 7,479 |  |  |  |  |
Schedule of share based compensation, stock options, activity | The following table summarizes the Company's stock option activity (number of options in thousands):
|  | Years ended December 31, |
|  | 2015 |  |  | 2014 |  |  | 2013 |
|  | Number of Options |  |  | Weighted Average Exercise Price |  |  | Number of Options |  |  | Weighted Average Exercise Price |  |  | Number of Options |  |  | Weighted Average Exercise Price |
Outstanding: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Beginning of year |  |  | 105 |  |  | $ | 15.38 |  |  |  | 109 |  |  | $ | 15.24 |  |  |  | 109 |  |  | $ | 15.24 |
Granted |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |
Exercised |  |  | - |  |  |  | - |  |  |  | (4 | ) |  |  | 11.62 |  |  |  | - |  |  |  | - |
Cancelled or forfeited |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |
End of year |  |  | 105 |  |  | $ | 15.38 |  |  |  | 105 |  |  | $ | 15.38 |  |  |  | 109 |  |  | $ | 15.24 |
Vested and expected to vest |  |  | 105 |  |  |  |  |  |  |  | 105 |  |  |  |  |  |  |  | 109 |  |  |  |  |
Exercisable: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
End of year |  |  | 105 |  |  |  |  |  |  |  | 105 |  |  |  |  |  |  |  | 109 |  |  |  |  |
Stock options outstanding and exercisable summarized by ranges of exercise prices | The following table summarizes information concerning stock options outstanding and exercisable at December 31, 2015 (number of options in thousands, contractual life in years):
Options Outstanding & Exercisable |
Exercise Price |  |  | Number of Options |  |  | Remaining Contractual Life |
$ | 12.90 |  |  |  | 28 |  |  |  | 1.16 |
| 16.29 |  |  |  | 77 |  |  |  | 1.39 |
$ | 15.38 |  |  |  | 105 |  |  |  | 1.33 |
Restricted Stock Units Activity | RSU activity for the years ended December 31, 2015, 2014, and 2013 is presented below (number of RSUs in thousands):
|  | Years ended December 31, |
|  | 2015 |  |  | 2014 |  |  | 2013 |
|  | Number of RSUs |  |  | Weighted Average Grant-date Fair Value |  |  | Number of RSUs |  |  | Weighted Average Grant-date Fair Value |  |  | Number of RSUs |  |  | Weighted Average Grant-date Fair Value |
Outstanding: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Beginning of year |  |  | 1,147 |  |  | $ | 12.75 |  |  |  | 1,059 |  |  | $ | 13.40 |  |  |  | 1,316 |  |  | $ | 12.53 |
Granted |  |  | 349 |  |  |  | 13.60 |  |  |  | 336 |  |  |  | 13.48 |  |  |  | 374 |  |  |  | 12.76 |
Vested* |  |  | (182 | ) |  |  | 11.41 |  |  |  | (146 | ) |  |  | 15.87 |  |  |  | (598 | ) |  |  | 10.92 |
Cancelled or forfeited |  |  | (286 | ) |  |  | 12.89 |  |  |  | (102 | ) |  |  | 17.45 |  |  |  | (33 | ) |  |  | 16.54 |
End of year |  |  | 1,028 |  |  | $ | 13.24 |  |  |  | 1,147 |  |  | $ | 12.75 |  |  |  | 1,059 |  |  | $ | 13.40 |
Expected to vest |  |  | 806 |  |  |  |  |  |  |  | 649 |  |  |  |  |  |  |  | 570 |  |  |  |  |
* The number of RSUs vested includes shares that the Company withheld on behalf of employees to satisfy statutory tax withholding requirements.
Schedule of share-based compensation arrangement by share-based payment award, performance-based units, vested and expected to vest | The number of performance-based RSUs scheduled to vest increases ratably based on the achievement of defined performance criteria between the established target and maximum levels. RSUs with performance-based vesting criteria are expected to vest as follows (number of RSUs in thousands):
Vesting Date |  | Expected to Vest |  |  | Not Expected to Vest |  |  | Total |
January 1, 2016** |  |  | - |  |  |  | 222 |  |  |  | 222 |
January 1, 2017 |  |  | 192 |  |  |  | - |  |  |  | 192 |
January 1, 2018 |  |  | 202 |  |  |  | - |  |  |  | 202 |
** The performance vesting criteria for the performance-based RSUs with a vesting date of January 1, 2016 were not achieved.
Phantom stock units activity under the 2007 Program | The following table summarizes the Company's phantom stock units activity for the years ended December 31, 2015, 2014, and 2013 (number of phantom stock units in thousands):
|  | Years ended December 31, |
|  | 2015 |  |  | 2014 |  |  | 2013 |
|  | Number of Phantom Stock Units |  |  | Grant- date Fair Value per Unit |  |  | Number of Phantom Stock Units |  |  | Grant- date Fair Value per Unit |  |  | Number of Phantom Stock Units |  |  | Grant- date Fair Value per Unit |
Outstanding: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Beginning of year |  |  | 119 |  |  |  |  |  |  | 107 |  |  |  |  |  |  | 97 |  |  |  |
Granted |  |  | 10 |  |  | $ | 14.09 |  |  |  | 10 |  |  | $ | 13.12 |  |  |  | 10 |  |  | $ | 10.75 |
Dividend equivalents issued |  |  | 3 |  |  |  |  |  |  |  | 2 |  |  |  |  |  |  |  | - |  |  |  |  |
Redeemed for common stock |  |  | - |  |  |  |  |  |  |  | - |  |  |  |  |  |  |  | - |  |  |  |  |
End of year |  |  | 132 |  |  |  |  |  |  |  | 119 |  |  |  |  |  |  |  | 107 |  |  |  |  |

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