Earnings per Share (Tables)

12 Months Ended

Dec. 31, 2016

Earnings per Share [Abstract]

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

(Weighted-average shares)	2016	2015	2014
Basic method	172,173,012	174,351,227	178,852,942
Dilutive stock options and restricted stock units *	–	–	1,218,042
Diluted method	172,173,012	174,351,227	180,070,984

*  Due to a net loss recognized by the Company for the year ended December 31, 2016 and 2015, 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

	2016	2015	2014
Antidilutive stock options excluded from diluted shares	5,757,435	5,443,288	1,893,364
Weighted average price of these options	$48.46	$52.93	$55.21