Earnings per Share (Tables)

9 Months Ended

Sep. 30, 2018

Weighted-Average Shares Outstanding for Computation of Basic and Diluted Income per Common Share



	Three Months Ended			Nine Months Ended
	September 30,			September 30,
(Weighted-average shares)	2018	2017		2018	2017
Basic method	173,047,246	172,572,873		172,949,450	172,509,418
Dilutive stock options and restricted stock units	1,128,021	–	1	1,252,310	–	1
Diluted method	174,175,267	172,572,873		174,201,760	172,509,418

1Due to a net loss in the three-month and nine-month periods ended September 30, 2017, no unvested stock awards were included in the computation of diluted earnings per shares because the effect would have been anti-dilutive.

Anti Dilutive Securities Not Included in Computation of Diluted EPS



	Three Months Ended				Nine Months Ended
		September 30,			September 30,
		2018	2017		2018		2017
Antidilutive stock options excluded from diluted shares		2,870,549		5,257,718		3,544,087		5,578,495
Weighted average price of these options	$	54.06	$	46.46	$	50.49	$	46.86