NET INCOME PER SHARE

12 Months Ended

Dec. 31, 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:

	Years Ended
	December 31, 2012		December 31, 2011		December 31, 2010
	(In thousands, except per share data)
Net income	$	30,445	$	314,990	$	423,075
Weighted-average shares - basic	433,017		455,629		458,482
Dilutive effect of incremental shares and share equivalents	4,565		7,044		11,098
Weighted-average shares - diluted	437,582		462,673		469,580
Net income per share:
Basic
Net income per share - basic	$	0.07	$	0.69	$	0.92
Diluted
Net income per share - diluted	$	0.07	$	0.68	$	0.90

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:

	Years Ended
	December 31, 2012	December 31, 2011	December 31, 2010
	(In thousands)
Employee stock options and restricted stock units outstanding	4,718	1,977	2,095