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Summary Stock Options Outstanding and Exercisable (Detail)	12 Months Ended
	Dec. 29, 2018 $ / shares shares
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Options Outstanding | shares	89,114
Options Exercisable | shares	88,114
Options Outstanding, Weighted Average Remaining Contractual Life (Years)	3 years 1 month 6 days
Options Exercisable, Weighted Average Contractual Life (Years)	3 years 1 month 6 days
Options Outstanding, Weighted Average Exercise Price per Share	$ 50.44
Options Exercisable, Weighted Average Exercise Price	50.35
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	6,800
Options Outstanding, Weighted Average Remaining Contractual Life (Years)	8 months 12 days
Options Outstanding, Weighted Average Exercise Price per Share	$ 36.57
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	18,600
Options Outstanding, Weighted Average Remaining Contractual Life (Years)	2 years 1 month 6 days
Options Outstanding, Weighted Average Exercise Price per Share	$ 41.80
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	63,714
Options Outstanding, Weighted Average Remaining Contractual Life (Years)	3 years 8 months 12 days
Options Outstanding, Weighted Average Exercise Price per Share	$ 54.44
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	6,800
Options Exercisable, Weighted Average Contractual Life (Years)	8 months 12 days
Options Exercisable, Weighted Average Exercise Price	$ 36.57
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	18,600
Options Exercisable, Weighted Average Contractual Life (Years)	2 years 1 month 6 days
Options Exercisable, Weighted Average Exercise Price	$ 41.80
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	62,714
Options Exercisable, Weighted Average Contractual Life (Years)	3 years 7 months 6 days
Options Exercisable, Weighted Average Exercise Price	$ 54.38

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The floor of a customized range of exercise prices for purposes of disclosing shares potentially issuable under outstanding stock option awards on all stock option plans and other required information pertaining to awards in the customized range.

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The number of shares reserved for issuance pertaining to the outstanding stock options as of the balance sheet date for all option plans in the customized range of exercise prices.

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