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Earnings Per Share (Tables)

3 Months Ended

Mar. 31, 2017

Earnings Per Share [Abstract]

Computation of basic and diluted earnings per share



	For the Three Months Ended March 31,
	2017				2016
Numerator (basic and diluted):
Net income	$	264,934			$	255,374

Denominator:
Weighted-average common shares outstanding – basic	92,001				97,140
Effect of stock options ⁽¹⁾	1,494				1,397
Weighted-average common shares outstanding – assuming dilution	93,495				98,537

Earnings per share:
Earnings per share-basic	$	2.88			$	2.63
Earnings per share-assuming dilution	$	2.83			$	2.59

Antidilutive potential common shares not included in the calculation of diluted earnings per share:
Stock options ⁽¹⁾	478				268
Weighted-average exercise price per share of antidilutive stock options ⁽¹⁾	$	266.71			$	256.19


⁽¹⁾	See Note 6 for further information concerning the terms of the Company’s share-based compensation plans.