Summary of Information Regarding Stock Options (Detail) (USD $) In Thousands, except Share data, unless otherwise specified	6 Months Ended
	Jun. 28, 2014
Number of Options
Beginning Balance, number of options	1,454,816
Granted, number of options	1,000
Exercised, number of options	(349,193)
Forfeited, number of options	(65,800)
Ending Balance, number of options	1,040,823
Options exercisable at the ending, Number of Options	644,573
Weighted Average Exercise Price per Share
Beginning Balance, Weighted Average Exercise Price per Share	$ 44.55
Granted, Weighted Average Exercise Price per Share	$ 58.06
Exercised, Weighted Average Exercise Price per Share	$ 41.07
Forfeited, Weighted Average Exercise Price per Share	$ 47.47
Ending Balance, Weighted Average Exercise Price per Share	$ 45.55
Options exercisable at June 28, 2014	$ 43.33
Weighted Average Remaining Contractual Term (years)
Options outstanding at June 28, 2014	5 years 7 months 6 days
Options exercisable at June 28, 2014	4 years 6 months
Aggregate Intrinsic Value
Options outstanding at June 28, 2014	$ 18,707
Options exercisable at June 28, 2014	$ 13,013