Income Taxes - Additional Information (Detail) - USD ($)		3 Months Ended
	Jan. 01, 2017	Mar. 30, 2018	Mar. 31, 2017	Dec. 31, 2017
Income Tax Contingency [Line Items]
Unrecognized Tax Benefits		$ 19,300,000
Effective income tax rate		(8.50%)	1.00%
Federal statutory income tax rate		21.00%
Unrecognized tax benefits that would impact the provision for income taxes		$ 1,000,000
Interest and possible penalties related to uncertain tax positions		500,000
Decrease in Unrecognized Tax Benefits is Reasonably Possible		1,500,000
Accumulated deficit		$ (2,060,075,000)		$ (2,057,812,000)
Accounting Standards Update 2016-09 [Member]
Income Tax Contingency [Line Items]
Accumulated deficit	$ 0
Accounting Standards Update 2016-09 [Member] | Deferred Tax Assets Gross
Income Tax Contingency [Line Items]
New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification	4,600,000
Accounting Standards Update 2016-09 [Member] | Valuation Allowance of Deferred Tax Assets
Income Tax Contingency [Line Items]
New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification	4,600,000
Accounting Standards Update 2016-16 [Member]
Income Tax Contingency [Line Items]
Cumulative Effect on Retained Earnings, Net of Tax	$ 1,400,000
Deferred Tax Assets, Net			$ 1,100,000
Deferred Tax Assets, Valuation Allowance			2,100,000
Deferred Tax Assets, Tax Deferred Expense			$ 300,000