Schedule II - Valuation and Qualifying Accounts (Detail) - Allowance for Doubtful Accounts [Member] - USD ($) $ in Thousands	12 Months Ended
	Dec. 28, 2019	Dec. 29, 2018	Dec. 30, 2017
Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at Beginning of Period	$ 3,320	$ 2,789	$ 964
Costs and expenses	996	1,553	1,984
Deductions	(600)	(1,022)	(159)
Balance at End of Period	$ 3,716	$ 3,320	$ 2,789