Stock Options Activity Related to Equity Incentive Plans (Detail) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Jan. 03, 2016	Dec. 28, 2014	Dec. 29, 2013
Common Stock Options Outstanding
Common Stock Options, beginning balance	3,590,115	4,317,065	4,662,539
Common Stock Options, granted	193,970	222,060	591,490
Common Stock Options, cancelled	(32,176)	(9,670)	(8,500)
Common Stock Options, exercised	(428,433)	(939,340)	(928,464)
Common Stock Options, ending balance	3,323,476	3,590,115	4,317,065
Common Stock Options, Exercisable at end of period	2,747,863
Common Stock Options Weighted Average Exercise Price
Weighted Average Exercise Price, beginning balance	$ 22.47	$ 17.17	$ 11.50
Weighted Average Exercise Price, Stock options granted	111.63	72.30	50.83
Weighted Average Exercise Price, Stock options cancelled	73.55	54.56	7.63
Weighted Average Exercise Price, Stock options exercised	11.70	9.56	10.22
Weighted Average Exercise Price, ending balance	28.57	$ 22.47	$ 17.17
Weighted Average Exercise Price, Exercisable at end of period	$ 18.67
Weighted Average Remaining Life (Years)	4 years 9 months 18 days
Weighted Average Remaining Life (Years), Exercisable at end of period	4 years 1 month 6 days
Stock options, Aggregate Intrinsic Value, ending balance	$ 275,589
Stock options, Aggregate Intrinsic Value, Exercisable at end of period	$ 254,388