Earnings Per Share (Tables)

9 Months Ended

Sep. 30, 2018

Earnings (Loss) Per Share (Thousands of Dollars and Shares Except Per Share Data) [Abstract]

Earnings (Loss) Per Share

	2018				2017
Quarter	Basic		Diluted		Basic		Diluted
Net earnings	$	263,861		263,861		265,583		265,583
Average shares outstanding		127,161		127,161		125,170		125,170
Effect of dilutive securities:
Options and other share-based awards		-		731		-		1,980
Equivalent Shares		127,161		127,892		125,170		127,150
Net earnings per common share	$	2.08		2.06		2.12		2.09

	2018				2017
Nine Months	Basic		Diluted		Basic		Diluted
Net earnings	$	211,668		211,668		401,905		401,905
Average shares outstanding		125,982		125,982		125,204		125,204
Effect of dilutive securities:
Options and other share-based awards		-		792		-		2,044
Equivalent Shares		125,982		126,774		125,204		127,248
Net earnings per common share	$	1.68		1.67		3.21		3.16