Earnings per Share (Tables)

3 Months Ended

Mar. 31, 2017

Earnings per Share [Abstract]

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

	Three Months Ended
	March 31,
(Weighted-average shares)	2017	2016
Basic method	172,422,449	172,114,012
Dilutive stock options and restricted stock units*	666,242	–
Diluted method	173,088,691	172,114,012

     *Due to a net loss, recognized by the Company for the 2016 period, no unvested stock awards were included in the computation of diluted earnings per share because the effect would have been anti-dilutive.

Anti Dilutive Securities Not Included in Computation of Diluted EPS

	Three Months Ended
		March 31,
		2017	2016
Antidilutive stock options excluded from diluted shares		5,029,752		5,714,823
Weighted average price of these options	$	52.26	$	51.07