Earnings Per Share (Tables)

12 Months Ended

Dec. 31, 2017

Earnings Per Share [Abstract]

Reconciliation Of Earnings Per Share Basic And Diluted

The following table sets forth the computation of basic and diluted earnings per share from continuing operations for the years ended December 31 (in thousands except per share amounts):

	2017		2016		2015
Numerator:
Income used in computing basic and diluted earnings per share	$	521,759	$	692,164	$	752,207
Denominator:
Denominator for basic earnings per share-weighted-average common shares	171,995		179,676		202,681
Effect of dilutive securities – employee stock compensation plan	937		859		1,005
Denominator for diluted earnings per share- adjusted weighted-average shares outstanding	172,932		180,535		203,686
Earnings per common share:
Basic	$	3.03	$	3.85	$	3.71
Diluted	$	3.02	$	3.83	$	3.69