Computation of Basic and Diluted Net Income Per Common Share (Parenthetical) (Detail) shares in Millions	9 Months Ended
	Oct. 04, 2015 $ / shares shares
Convertible Notes
Net Income Loss Per Common Share
Initial debt conversion price | $ / shares	$ 5.48
Shares that would be issued upon conversion	34.7
Convertible Notes Hedge Warrant
Net Income Loss Per Common Share
Initial debt conversion price | $ / shares	$ 7.6650
Shares that would be issued upon conversion	34.7