Note 18. Net Income Per Share

9 Months Ended

Sep. 30, 2012

Earnings Per Share [Abstract]

Net Income per Share

18. Net Income per Share

Basic net income (loss) per share is computed by dividing net income (loss) by the weighted-average number of common shares outstanding for the period. Diluted net income (loss) per share is computed giving effect to all potential dilutive common stock, including employee stock options, restricted stock units, stock purchase plan shares, and contingently issuable shares, unless there is a net loss per share for the period.

The calculation of basic and diluted net income (loss) per share for the three and nine months ended September 30, 2012 and September 30, 2011 was as follows (in thousands, except per share amounts):

	Three Months Ended				Nine Months Ended
	September 30, 2012		September 30, 2011		September 30, 2012			September 30, 2011
Basic net income (loss) per share
Numerator:
Net income (loss)	$	87,917	$	196,514	$	(250,516	)	$	373,620
Denominator:
Weighted-average common stock outstanding	86,992		86,338		86,785			85,946
Diluted net income (loss) per share
Denominator:
Weighted-average common stock outstanding	86,992		86,338		86,785			85,946
Effect of stock options, restricted stock units, stock purchase plan shares, and contingent issuable shares	773		813		—			1,168
Weighted-average shares used in computing diluted net income (loss) per share	87,765		87,151		86,785			87,114

	Three Months Ended				Nine Months Ended
	September 30, 2012		September 30, 2011		September 30, 2012			September 30, 2011
Per share information — basic:
Net income (loss) per share	$	1.01	$	2.28	$	(2.89	)	$	4.35
Per share information — diluted:
Net income (loss) per share	$	1.00	$	2.25	$	(2.89	)	$	4.29

The following number of outstanding employee stock options, restricted stock units and stock purchase plan shares were excluded from the computation of diluted net income (loss) per share for the three and nine months ended September 30, 2012 and September 30, 2011 as they would have had an anti-dilutive effect (in thousands):

	Three Months Ended		Nine Months Ended
	September 30, 2012	September 30, 2011	September 30, 2012	September 30, 2011
Restricted stock units, stock purchase plan, and options to purchase common stock	1,071	315	1,907	448