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Earnings per share (Tables)
 12 Months Ended
Dec. 31, 2013
Earnings Per Share [Abstract]  
Basic and diluted earnings (loss) per share
 The following table shows the basic and diluted earnings (loss) per share for 2013, 2012, and 2011:
 
For the year ended December 31, 2013
 
Net loss
Shares (000)
Per-Share
Net loss
$
(40,313
)
 
 
Amount allocated to common shareholders (1)
100.00
%
 
 
Basic and Diluted EPS:
 

 
 
Loss available to common shareholders
$
(40,313
)
88,612

$
(0.45
)
 
For the year ended December 31, 2012
 
Net loss
Shares (000)
Per-Share
Net loss
$
(35,610
)
 

 
Amount allocated to common shareholders (1)
100.00
%
 

 
Basic and Diluted EPS:
 

 

 
Loss available to common shareholders
$
(35,610
)
88,534

$
(0.40
)
 
For the year ended December 31, 2011
 
Net income
Shares (000)
Per-Share
Net income
$
11,325

 

 
Amount allocated to common shareholders
91.87
%
 

 
Basic EPS:
 

 

 
Income allocable to common shareholders
$
10,404

91,854

$
0.11

Effect of Dilutive Securities:
 

 

 

Share-based compensation plans
 

403

 

Diluted EPS:
 

 

 

Income applicable to common shareholders with assumed conversion
$
10,404

92,257

$
0.11


(1)
We have not allocated net losses between common and preferred shareholders, as the holders of our preferred shares do not have a contractual obligation to share in the loss.
Antidilutive securities excluded from calculation of diluted EPS

Antidilutive securities excluded from the calculation of diluted EPS:
 
 
 
 
2013
2012
2011
Stock options (1)
619,833

626,334

353,000

Service-based share awards (1)
442,737

396,133

—


 
(1)
In periods when we report a net loss, all share awards are excluded from the calculation of diluted weighted average shares outstanding because of their antidilutive effect on earnings (loss) per share.