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Stock Repurchase Program - Additional Information (Detail) - USD ($)	3 Months Ended					9 Months Ended		36 Months Ended
	Sep. 26, 2020	Jun. 27, 2020	Mar. 28, 2020	Sep. 28, 2019	Jun. 29, 2019	Sep. 26, 2020	Sep. 28, 2019	Jul. 01, 2021	Sep. 11, 2018
Class of Stock [Line Items]
Stock Repurchase Program, Remaining Authorized Repurchase Amount	$ 4,700,000					$ 4,700,000
Shares repurchased(1)	0			1,000		4,000	208,000
Average cost per share	$ 0			$ 139.91		$ 164.44	$ 134.05
Value of shares repurchased	$ 0	$ 220,000	$ 371,000	$ 70,000	$ 27,854,000	$ 591,000	$ 27,924,000
2018 Repurchase Program | Common Stock
Class of Stock [Line Items]
Number of common shares authorized to be repurchased under new stock repurchase program									5,000,000.0
Forecast [Member] | 2018 Repurchase Program | Common Stock
Class of Stock [Line Items]
Stock Repurchase Program, Period								3 years

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The number of shares authorized to be repurchased by an entity's Board of Directors under a stock repurchase plan.

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Period which shares may be purchased under a stock repurchase plan authorized by an entity's Board of Directors, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Amount remaining of a stock repurchase plan authorized.

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Total cost of shares repurchased divided by the total number of shares repurchased.

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Number of shares that have been repurchased during the period and are being held in treasury.

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Equity impact of the cost of common and preferred stock that were repurchased during the period. Recorded using the cost method.

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