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Summary of Information Regarding Stock Options (Detail) - Jun. 27, 2015 - USD ($)
$ / shares in Units, $ in Thousands
Total
Number of Options  
Beginning Balance, number of options 773,839
Exercised, number of options (65,600)
Forfeited, number of options (1,000)
Ending Balance, number of options 707,239
Options exercisable at the ending, Number of Options 478,339
Weighted Average Exercise Price per Share  
Beginning Balance, Weighted Average Exercise Price per Share $ 46.92
Exercised, Weighted Average Exercise Price per Share 45.59
Forfeited, Weighted Average Exercise Price per Share 52.60
Ending Balance, Weighted Average Exercise Price per Share 47.04
Options exercisable at June 27, 2015 $ 45.06
Weighted Average Remaining Contractual Term (years)  
Options outstanding at June 27, 2015 5 years 3 months 18 days
Options exercisable at June 27, 2015 4 years 8 months 12 days
Aggregate Intrinsic Value  
Options outstanding at June 27, 2015 $ 14,225
Options exercisable at June 27, 2015 $ 10,565