STOCKHOLDERS' EQUITY - Additional Information (Detail) (USD $)	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Stockholders Equity Note [Line Items]
Common Stock, par value	$ 0.0005	$ 0.0005
Common Stock, votes per share	1
Share repurchase program, approved amount	$ 500,000,000
Share repurchase program, amount remaining for share repurchases	293,500,000
Payments for common stock repurchases	211,986,000	99,820,000	3,744,000
ValueAct Capital Master Fund Limited Partnership
Stockholders Equity Note [Line Items]
Payments for common stock repurchases	$ 211,986,000