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Earnings (loss) per common share
6 Months Ended
Jun. 30, 2017
Earnings Per Share [Abstract]  
Earnings (loss) per common share
Earnings (loss) per common share
Basic earnings (loss) per common share were computed by dividing earnings (loss) on common stock by the weighted average number of shares of common stock outstanding during the applicable period. Diluted earnings (loss) per common share were computed by dividing earnings (loss) on common stock by the total of the weighted average number of shares of common stock outstanding during the applicable period, plus the effect of outstanding performance share awards. Common stock outstanding includes issued shares less shares held in treasury. Net income (loss) was the same for both the basic and diluted earnings (loss)per share calculations. A reconciliation of the weighted average common shares outstanding used in the basic and diluted earnings (loss) per share calculations was as follows:
 
Three Months Ended
Six Months Ended
 
June 30,
June 30,
 
2017

2016

2017

2016

 
(In thousands)
Weighted average common shares outstanding - basic
195,304

195,304

195,304

195,294

Effect of dilutive performance share awards
669

395

689

384

Weighted average common shares outstanding - diluted
195,973

195,699

195,993

195,678

Shares excluded from the calculation of diluted earnings per share