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Share-Based Compensation (Tables) - 2011 Equity Incentive Plan [Member]
 12 Months Ended
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.