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Share-Based Compensation (Tables) - 2011 Equity Incentive Plan [Member] | 12 Months Ended
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Dec. 31, 2017
Stock Option [Member] |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Schedule Of Employee Compensation Equity Incentive Plan Activity (Stock Option) | The following table summarizes the activity of stock options during fiscal years 2017, 2016 and 2015:
|  | Units |  | Weighted-average strike price |  | Weighted-average grant-date fair value
Outstanding at December 31, 2014 |  | 2,550,835 |  |  | 17.62 |  |  | 4.94 |
Forfeitures |  | (141,130 | ) |  | 16.54 |  |  | 5.02 |
Expired (i) |  | (383,811 | ) |  | 20.01 |  |  | 5.41 |
Outstanding at December 31, 2015 |  | 2,025,894 |  |  | 21.03 |  |  | 5.87 |
Forfeitures |  | (80,734 | ) |  | 10.30 |  |  | 2.68 |
Expired (i) |  | (51,305 | ) |  | 14.05 |  |  | 4.02 |
Modification (ii) |  | (1,117,380 | ) |  | 19.07 |  |  | 5.30 |
Outstanding at December 31, 2016 |  | 776,475 |  |  | 15.55 |  |  | 4.46 |
Expired (i) |  | (141,986 | ) |  | 21.20 |  |  | 5.28 |
Outstanding at December 31, 2017 |  | 634,489 |  |  | 14.28 |  |  | 4.28 |
Exercisable at December 31, 2017 |  | 540,331 |  |  | 15.03 |  |  | 4.58 |
(i) | As of December 31, 2017, 2016 and 2015, Additional paid-in capital included $750, $206 and $2,077 respectively, related to expired stock options.
(ii) | Corresponds to stock options converted to a liability award.
Schedule Of Vested And Nonvested Unit Activity | The following table provides a summary of outstanding stock options at December 31, 2017: 2011 Equity Incentive Plan (continued) Stock Options (continued)
|  | Vested (i) |  | Non-vested (ii) |  | Total
Number of units outstanding |  | 540,331 |  |  | 94,158 |  |  | 634,489 |
Weighted-average grant-date fair market value per unit |  | 4.58 |  |  | 2.53 |  |  | 4.28 |
Total grant-date fair value |  | 2,476 |  |  | 238 |  |  | 2,714 |
Weighted-average accumulated percentage of service |  | 100 |  |  | 86.6 |  |  | 98.8 |
Stock-based compensation recognized in Additional paid-in capital |  | 2,476 |  |  | 206 |  |  | 2,682 |
Compensation expense not yet recognized (iii) |  | — |  |  | 32 |  |  | 32 |
(i)Related to exercisable awards. (ii)Related to awards that will vest between fiscal years 2017 and 2019. (iii)Expected to be recognized in a weighted-average period of 0.3 years.
Restricted Share Units [Member] |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Schedule Of Restricted Share Units Activity | The following table summarizes the activity of restricted share units during fiscal years 2017, 2016 and 2015: 2011 Equity Incentive Plan (continued) Restricted Share Units (continued)
|  | Units |  | Weighted-average grant-date fair value
Outstanding at December 31, 2014 |  | 862,855 |  |  | 14.38 |
2015 annual grant |  | 923,213 |  |  | 6.33 |
Partial vesting of 2011 grant |  | (222,781 | ) |  | 21.20 |
Partial vesting of 2012 grant |  | (31,772 | ) |  | 14.35 |
Partial vesting of 2013 grant |  | (68,300 | ) |  | 14.31 |
Forfeitures |  | (233,005 | ) |  | 9.88 |
Outstanding at December 31, 2015 |  | 1,230,210 |  |  | 7.96 |
2016 annual grant |  | 865,291 |  |  | 4.70 |
Partial vesting of 2011 grant |  | (27,075 | ) |  | 21.20 |
Partial vesting of 2012 grant |  | (24,653 | ) |  | 14.35 |
Partial vesting of 2013 grant |  | (26,054 | ) |  | 14.31 |
Partial vesting of 2014 grant |  | (94,546 | ) |  | 8.58 |
Forfeitures |  | (142,176 | ) |  | 6.64 |
Outstanding at December 31, 2016 |  | 1,780,997 |  |  | 6.07 |
2017 annual grant |  | 497,960 |  |  | 9.20 |
Partial vesting of 2012 grant |  | (23,003 | ) |  | 14.35 |
Partial vesting of 2013 grant |  | (24,073 | ) |  | 14.31 |
Partial vesting of 2014 grant |  | (44,312 | ) |  | 8.58 |
Partial vesting of 2015 grant |  | (269,896 | ) |  | 6.33 |
Forfeitures |  | (180,828 | ) |  | 5.99 |
Outstanding at December 31, 2017 |  | 1,736,845 |  |  | 6.65 |
Exercisable at December 31, 2017 |  | — |  |  | — |
Schedule Of Vested And Nonvested Unit Activity | The following table provides a summary of outstanding restricted share units at December 31, 2017:
Number of units outstanding (i) | 1,736,845 |
Weighted-average grant-date fair market value per unit | 6.65 |
Total grant-date fair value | 11,542 |
Weighted-average accumulated percentage of service | 49.80 |
Stock-based compensation recognized in Additional paid-in capital | 5,744 |
Compensation expense not yet recognized (ii) | 5,798 |
(i) | Related to awards that will vest between fiscal years 2018 and 2022.
(ii) | Expected to be recognized in a weighted-average period of 2.0 years.

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