XML 56 R39.htm IDEA: XBRL DOCUMENT v3.4.0.3
Earnings (loss) per common share (Details) - shares
shares in Thousands
3 Months Ended
Mar. 31, 2016
Mar. 31, 2015
Earnings Per Share [Abstract]    
Weighted average common shares outstanding - basic 195,284 194,479
Effect of dilutive performance share awards 0 87
Weighted average common shares outstanding - diluted 195,284 194,566
Shares excluded from the calculation of diluted earnings per share 0 0