Stock Based Compensation - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended
Mar. 31, 2021	Mar. 27, 2020
Share-based compensation arrangement by share-based payment award [Line Items]
Unrecognized compensation expense related to stock compensation plans	$ 426,000
Share-based payment arrangement, nonvested award, cost not yet recognized, period for recognition	4 years 2 months 15 days
Restricted stock [Member]
Share-based compensation arrangement by share-based payment award [Line Items]
Unrecognized compensation expense related to stock compensation plans	$ 655,000
Share-based payment arrangement, nonvested award, cost not yet recognized, period for recognition	4 years 2 months 12 days
Stock option expense recognised	$ 35,000
Employee Stock Option [Member]
Share-based compensation arrangement by share-based payment award [Line Items]
Stock option expense recognised	$ 23,000
Twenty twenty equity incentive plan [Member]
Share-based compensation arrangement by share-based payment award [Line Items]
Stock based compensation number of shares authorized		238,467
Twenty twenty equity incentive plan [Member] \| Restricted stock [Member]
Share-based compensation arrangement by share-based payment award [Line Items]
Stock based compensation number of shares authorized		95,387

Amount of expense for award under share-based payment arrangement. Excludes amount capitalized.

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Amount of cost not yet recognized for nonvested award under share-based payment arrangement.

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Weighted-average period over which cost not yet recognized is expected to be recognized for award under share-based payment arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

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Number of shares authorized for issuance under share-based payment arrangement.

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