Net Income Per Common Share (Parenthetical) (Detail) (USD $)	3 Months Ended		9 Months Ended
	Sep. 29, 2013	Sep. 30, 2012	Sep. 29, 2013	Sep. 30, 2012	Mar. 31, 2009
Net Income Loss Per Common Share
Initial debt conversion price	$ 5.48		$ 5.48
Shares that would be issued upon conversion			34,703,196
Convertible Notes
Net Income Loss Per Common Share
Initial debt conversion price	$ 5.48	$ 5.48	$ 5.48	$ 5.48
Shares that would be issued upon conversion	34,700,000	34,700,000	34,700,000	34,700,000
Convertible Notes Hedge Warrant
Net Income Loss Per Common Share
Initial debt conversion price	$ 7.67	$ 7.67	$ 7.67	$ 7.67	$ 7.67
Shares that would be issued upon conversion	34,700,000	34,700,000	34,700,000	34,700,000