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Earnings Per Share (Tables)

3 Months Ended

Mar. 31, 2016

Earnings Per Share [Abstract]

Computation of basic and diluted earnings per share



	For the Three Months Ended March 31,
	2016				2015
Numerator (basic and diluted):
Net income	$	255,374			$	212,864

Denominator:
Weighted-average common shares outstanding – basic	97,140				101,612
Effect of stock options ⁽¹⁾	1,397				1,645
Weighted-average common shares outstanding – assuming dilution	98,537				103,257

Earnings per share:
Earnings per share-basic	$	2.63			$	2.09
Earnings per share-assuming dilution	$	2.59			$	2.06

Antidilutive potential common shares not included in the calculation of diluted earnings per share:
Stock options ⁽¹⁾	268				278
Weighted-average exercise price per share of antidilutive stock options ⁽¹⁾	$	256.19			$	195.90


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