Summary of Stock Options under Equity Plan and Non-Employee Director Plan (Detail) (USD $) In Thousands, except Share data, unless otherwise specified	12 Months Ended
	Dec. 29, 2012
Shares
Outstanding at beginning of period	1,908,664
Granted	59,967
Forfeited	(4,550)
Expired
Exercised	(245,965)
Outstanding at end of period	1,718,116
Exercisable at end of period	409,272
Vested and expected to vest at end of period	1,551,968
Weighted-Average Exercise Price
Outstanding at beginning of period	$ 41.78
Granted	$ 103.61
Forfeited	$ 95.09
Expired
Exercised	$ 23.29
Outstanding at end of period	$ 46.44
Exercisable at end of period	$ 36.70
Vested and expected to vest at end of period	$ 46.89
Weighted-Average Remaining Contractual Term
Outstanding at end of period	5 years 6 months 22 days
Exercisable at end of period	4 years 7 months 21 days
Vested and expected to vest at end of period	5 years 6 months 4 days
Aggregate Intrinsic Value
Outstanding at end of period	$ 148,684
Exercisable at end of period	39,404
Vested and expected to vest at end of period	$ 133,610