Net Income per Share (Tables)

9 Months Ended

Sep. 30, 2012

Earnings Per Share Reconciliation [Abstract]

Schedule of Components Used in Diluted and Basic Income Per Common Share

The following table sets forth the components used in the computation of basic and diluted net income per common share (in thousands, except per share data):

	For the Three Months Ended September 30,				For the Nine Months Ended September 30,
	2012		2011		2012		2011
Numerator:
Net income	$	48,231	$	42,285	$	135,697	$	140,823
Denominator:
Shares used for basic net income per common share	177,455		183,085		178,040		185,515
Effect of dilutive securities:
Stock options	2,101		1,928		2,207		2,698
RSUs and deferred stock units	1,497		691		1,491		876
Shares used for diluted net income per common share	181,053		185,704		181,738		189,089
Basic net income per common share	$	0.27	$	0.23	$	0.76	$	0.76
Diluted net income per common share	$	0.27	$	0.23	$	0.75	$	0.74

Schedule of Shares Excluded from Computation of Diluted Earnings Per Share

The potentially outstanding shares excluded from the computation of diluted earnings per share is as follows (in thousands):

	For the Three Months Ended September 30,		For the Nine Months Ended September 30,
	2012	2011	2012	2011
Options	2,438	4,508	2,735	3,265
Service-based RSUs	1,321	1,481	1,401	787
Performance-based RSUs	1,518	2,836	1,536	2,973
Total shares excluded from computation	5,277	8,825	5,672	7,025