NET INCOME PER SHARE

9 Months Ended

Sep. 30, 2012

Earnings Per Share [Abstract]

NET INCOME PER SHARE

NET INCOME PER SHARE

Basic net income per share is calculated by using the weighted-average number of common shares outstanding during that period. Diluted net income per share is calculated giving effect to all dilutive potential common shares that were outstanding during the period. Dilutive potential common shares consist of incremental common shares issuable upon exercise of stock options and vesting of restricted stock units for all periods and accrued issuance of shares under employee stock purchase plans.

A reconciliation of the numerator and denominator of basic and diluted net income per share is as follows:

	Three Months Ended				Nine Months Ended
	September 30, 2012		September 30, 2011		September 30, 2012		September 30, 2011
	(in thousands, except per share data)
Net income	$	21,636	$	116,706	$	42,777	$	282,129
Weighted-average shares - basic	430,845		457,721		434,894		456,992
Dilutive effect of incremental shares and share equivalents	2,450		9,141		3,338		10,048
Weighted-average shares - diluted	433,295		466,862		438,232		467,040
Net income per share:
Basic
Net income per share - basic	$	0.05	$	0.25	$	0.10	$	0.62
Diluted
Net income per share - diluted	$	0.05	$	0.25	$	0.10	$	0.60

The following table summarizes securities which were not included in the “Weighted-average shares — diluted” used for calculation of diluted net income per share, as their effect would have been anti-dilutive:

	Three Months Ended		Nine Months Ended
	September 30, 2012	September 30, 2011	September 30, 2012	September 30, 2011
	(in thousands)
Employee stock options and restricted stock units outstanding	9,991	1,999	7,739	1,030