Income Taxes - Additional Information (Detail) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Oct. 02, 2011	Sep. 30, 2012	Oct. 02, 2011
Income Taxes [Line Items]
Provision for/(benefit from) income taxes	$ 15,100,000	$ 7,800,000	$ (22,162,000)	$ 12,596,000
Reversal in liabilities for uncertain tax positions			10,800,000	9,600,000
Portion of income tax benefit due to release of valuation allowance			43,200,000
Unrecognized tax benefits related to uncertain tax positions			5,700,000	5,600,000
Interest and penalties related to uncertain tax positions			5,100,000	4,000,000
Unrecognized tax benefits	188,400,000		188,400,000
Estimated decrease in unrecognized tax benefits, plus accrued interest and penalties			$ 16,300,000