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Earnings (loss) per common share (Tables)
3 Months Ended
Mar. 31, 2016
Earnings Per Share [Abstract]  
Weighted average common shares outstanding
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
 
March 31,
 
2016

2015

 
(In thousands)
Weighted average common shares outstanding - basic
195,284

194,479

Effect of dilutive performance share awards

87

Weighted average common shares outstanding - diluted
195,284

194,566

Shares excluded from the calculation of diluted earnings per share