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Capital Stock - Summary of Information Concerning Currently Outstanding and Exercisable Options (Detail)
12 Months Ended
Dec. 30, 2017
$ / shares
shares
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]  
Number Outstanding | shares 122,547
Weighted Average Remaining Contractual Life (Years) 3 years 7 months 6 days
Weighted Average Exercise Price $ 57.74
Number Exercisable | shares 22,520
Options Exercisable, Weighted Average Exercise Price $ 31.07
Range One [Member]  
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]  
Option Price per share, Minimum 5.67
Option Price per share, Maximum $ 24.66
Number Outstanding | shares 8,000
Weighted Average Remaining Contractual Life (Years) 1 year 4 months 24 days
Weighted Average Exercise Price $ 6.71
Number Exercisable | shares 8,000
Options Exercisable, Weighted Average Exercise Price $ 6.71
Range Two [Member]  
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]  
Option Price per share, Minimum 26.67
Option Price per share, Maximum $ 41.60
Number Outstanding | shares 43,679
Weighted Average Remaining Contractual Life (Years) 3 years 1 month 6 days
Weighted Average Exercise Price $ 41.59
Number Exercisable | shares 10,920
Options Exercisable, Weighted Average Exercise Price $ 41.59
Range Three [Member]  
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]  
Option Price per share, Minimum 41.61
Option Price per share, Maximum $ 69.01
Number Outstanding | shares 14,400
Weighted Average Remaining Contractual Life (Years) 3 years 6 months
Weighted Average Exercise Price $ 53.32
Number Exercisable | shares 3,600
Options Exercisable, Weighted Average Exercise Price $ 53.32
Range Four [Member]  
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]  
Option Price per share, Minimum 69.02
Option Price per share, Maximum $ 77.99
Number Outstanding | shares 1,630
Weighted Average Remaining Contractual Life (Years) 5 years 1 month 6 days
Weighted Average Exercise Price $ 69.02
Range Five [Member]  
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]  
Option Price per share, Minimum 77.80
Option Price per share, Maximum $ 82.59
Number Outstanding | shares 54,838
Weighted Average Remaining Contractual Life (Years) 4 years 2 months 12 days
Weighted Average Exercise Price $ 78.86