Net Income (Loss) Per Common Share (Tables)

12 Months Ended

Jul. 31, 2011

Net Income (Loss) Per Common Share [Abstract]

Computation of net income (loss) per share

	Years Ended July 31,
	2011		2010			2009
	(In thousands, except per share data)
Net income (loss)	$	70,688	$	(33,998	)	$	(23,413	)
Weighted-average common shares outstanding — basic		100,299		89,978			84,612
Dilutive effect of employee stock plans		16,818		—			—
Weighted-average common shares outstanding — diluted		117,117		89,978			84,612
Net income (loss) per share — basic	$	0.70	$	(0.38	)	$	(0.28	)
Net income (loss) per share — diluted	$	0.60	$	(0.38	)	$	(0.28	)

Antidilutive shares excluded from calculation of diluted net loss per share

	Years Ended July 31,
	2011		2010		2009
	(In thousands)
Options to purchase common stock		1,279		4,072		8,212
Restricted stock awards		227		175		860