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Earnings Per Share (Tables)

3 Months Ended

Mar. 31, 2014

Earnings Per Share [Abstract]

Computation of basic and diluted earnings per share



	For the Three Months Ended March 31,
	2014				2013
Numerator (basic and diluted):
Net income	$	173,860			$	154,329

Denominator:
Denominator for basic earnings per share - weighted-average shares	106,191				111,557
Effect of stock options ⁽¹⁾	1,879				1,839
Denominator for diluted earnings per share - weighted-average shares	108,070				113,396

Earnings per share:
Earnings per share-basic	$	1.64			$	1.38
Earnings per share-assuming dilution	$	1.61			$	1.36

Antidilutive common stock equivalents not included in the calculation of diluted earnings per share:
Stock options ⁽¹⁾	288				1,555
Weighted-average exercise price per share of antidilutive stock options ⁽¹⁾	$	135.22			$	91.08


⁽¹⁾	See Note 6 for further discussion on the terms of the Company's share-based compensation plans.