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Summary Stock Options Outstanding and Exercisable (Detail)
12 Months Ended
Dec. 30, 2017
$ / shares
shares
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]  
Options Outstanding | shares 189,040
Options Exercisable | shares 169,240
Options Outstanding, Weighted Average Remaining Contractual Life (Years) 3 years 10 months 25 days
Options Exercisable, Weighted Average Contractual Life (Years) 3 years 9 months 18 days
Options Outstanding, Weighted Average Exercise Price per Share $ 49.34
Options Exercisable, Weighted Average Exercise Price 48.50
Range One  
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]  
Minimum Exercise Price 35.64
Maximum Exercise Price $ 40.00
Options Outstanding | shares 15,400
Options Outstanding, Weighted Average Remaining Contractual Life (Years) 1 year 7 months 6 days
Options Outstanding, Weighted Average Exercise Price per Share $ 36.46
Range Two  
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]  
Minimum Exercise Price 40.01
Maximum Exercise Price $ 45.00
Options Outstanding | shares 49,250
Options Outstanding, Weighted Average Remaining Contractual Life (Years) 3 years 1 month 6 days
Options Outstanding, Weighted Average Exercise Price per Share $ 41.76
Range Three  
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]  
Minimum Exercise Price 45.01
Maximum Exercise Price $ 58.06
Options Outstanding | shares 124,390
Options Outstanding, Weighted Average Remaining Contractual Life (Years) 4 years 6 months
Options Outstanding, Weighted Average Exercise Price per Share $ 53.93
Range Four  
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]  
Minimum Exercise Price 35.64
Maximum Exercise Price $ 40.00
Options Exercisable | shares 15,400
Options Exercisable, Weighted Average Contractual Life (Years) 1 year 7 months 6 days
Options Exercisable, Weighted Average Exercise Price $ 36.46
Range Five  
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]  
Minimum Exercise Price 40.01
Maximum Exercise Price $ 45.00
Options Exercisable | shares 49,250
Options Exercisable, Weighted Average Contractual Life (Years) 3 years 1 month 6 days
Options Exercisable, Weighted Average Exercise Price $ 41.76
Range Six  
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]  
Minimum Exercise Price 45.01
Maximum Exercise Price $ 56.40
Options Exercisable | shares 104,590
Options Exercisable, Weighted Average Contractual Life (Years) 4 years 4 months 24 days
Options Exercisable, Weighted Average Exercise Price $ 53.45