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Earnings Per Share
9 Months Ended
Sep. 30, 2013
Earnings Per Share [Abstract]  
Earnings Per Share
Earnings per Share

Basic earnings per share are computed using the weighted average number of common shares outstanding during the period. Diluted earnings per share are computed using the weighted average shares outstanding during the period, but also include the dilutive effect of awards of restricted stock, using the treasury stock method, and outstanding convertible preferred stock. Under the treasury stock method, the amount of unrecognized compensation expense related to unvested stock-based compensation grants is assumed to be used to repurchase shares at the average market price. The following table summarizes the calculation of weighted average common shares outstanding used in the computation of diluted earnings per share, for the three and nine-month periods ended September 30, 2013 and 2012 (in thousands):
 
Three Months Ended September 30,
 
Nine Months Ended September 30,
 
2013
 
2012
 
2013
 
2012
Weighted average basic common shares outstanding
483,582

 
476,037

 
480,209

 
445,991

Effect of dilutive securities
 
 
 
 
 
 
 
Restricted stock

 

 

 
1,176

Convertible preferred stock

 

 

 
90,133

Weighted average diluted common and potential common shares outstanding
483,582

 
476,037

 
480,209

 
537,300



For the nine-month period ended September 30, 2013 and three-month period ended September 30, 2012, restricted stock awards covering 1.0 million and 0.4 million shares, respectively, were excluded from the computation of loss per share because their effect would have been antidilutive.
In computing diluted earnings per share, the Company evaluated the if-converted method with respect to its outstanding convertible perpetual preferred stock for the three and nine-month periods ended September 30, 2013 and 2012. Under the if-converted method, the Company assumes the conversion of the preferred stock to common stock and determines if this is more dilutive than including the preferred stock dividends (paid and unpaid) in the computation of income available (loss applicable) to common stockholders. For the three and nine-month periods ended September 30, 2013 and the three-month period ended September 30, 2012, the Company determined the if-converted method was antidilutive and included the 8.5%, 6.0% and 7.0% preferred stock dividends in the determination of loss applicable to common stockholders. For the nine-month period ended September 30, 2012, the Company determined the if-converted method was more dilutive and did not include the 8.5%, 6.0% and 7.0% preferred stock dividends in the determination of income available to common stockholders.