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Earnings Per Share - Additional Information (Detail) - $ / shares shares in Thousands	3 Months Ended		9 Months Ended
	Sep. 27, 2021	Sep. 28, 2020	Sep. 27, 2021	Sep. 28, 2020
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Share-based payment arrangement, option, exercise price range, lower range limit		$ 11.83		$ 11.83
Share-based payment arrangement, option, exercise price range, upper range limit		$ 16.60		$ 16.60
Performance-based Restricted Stock Units (PRUs), Restricted Stock Units (RSUs) and Stock Options
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Shares excluded from calculating diluted earnings per share	997		866
Stock Options | Exercise Prices Ranging from $11.83 to $16.60 Per Share
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Shares excluded from calculating diluted earnings per share		80		80
PRUs | Exercise Prices Ranging from $11.83 to $16.60 Per Share
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Shares excluded from calculating diluted earnings per share		216		216
RSUs | Exercise Prices Ranging from $11.83 to $16.60 Per Share
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Shares excluded from calculating diluted earnings per share		3,187		3,187

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Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented.

+ References

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