Annual report pursuant to Section 13 and 15(d)

Schedule II - Valuation Accounts - Summary of Valuation Accounts (Detail)

v3.20.4
Schedule II - Valuation Accounts - Summary of Valuation Accounts (Detail) - Allowance for Doubtful Accounts - USD ($)
$ in Thousands
12 Months Ended
Dec. 26, 2020
Dec. 28, 2019
Dec. 29, 2018
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]      
Balance $ 1,891 $ 846 $ 1,121
Additions charged to cost and expense 1,378 790 (40)
Others (874) 255 (235)
Balance $ 2,395 $ 1,891 $ 846