Earnings Per Share (Tables)

6 Months Ended

Jun. 30, 2013

Earnings Per Share

Computation of basic and diluted earnings per share

	For the Three Months Ended				For the Six Months Ended
	June 30,				June 30,
	2013		2012		2013		2012
Numerator (basic and diluted):
Net income	$	177,127	$	146,120	$	331,456	$	293,612
Denominator:
Denominator for basic earnings per share - weighted-average shares		110,278		124,870		110,914		125,920
Effect of stock options (1)		1,801		2,318		1,822		2,341
Denominator for diluted earnings per share - weighted-average shares		112,079		127,188		112,736		128,261
Earnings per share-basic	$	1.61	$	1.17	$	2.99	$	2.33
Earnings per share-assuming dilution	$	1.58	$	1.15	$	2.94	$	2.29

Antidilutive stock option summary

Antidilutive common stock equivalents not included in the calculation of diluted earnings per share:
Stock options (1)		784		1,035		1,182		1,213
Weighted-average exercise price per share of antidilutive stock options (1)	$	96.38	$	89.69	$	93.57	$	87.85
(1) See Note 8 for further discussion on the terms of the Company's share-based compensation plans.