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Summary of Activity in Company's Valuation Allowance (Detail) - Valuation Allowance of Deferred Tax Assets - USD ($)
$ in Thousands
 12 Months Ended
Dec. 28, 2020
Dec. 30, 2019
Dec. 31, 2018
Valuation Allowance [Line Items]      
Balance at beginning of year $ 14,292 $ 16,635 $ 152,728
Reduction related to acquisition     (76,040)
Additions charged to expense 3,904 1,526  
Other reduction charged to expense (2,874) (3,869) (60,053)
Balance at end of year $ 15,322 $ 14,292 $ 16,635