Valuation and Qualifying Accounts and Reserves (Detail) - USD ($) $ in Thousands		12 Months Ended
		Dec. 28, 2019	Dec. 29, 2018	Dec. 30, 2017
Allowance for doubtful accounts
Valuation And Qualifying Accounts Disclosure [Line Items]
Balance at Beginning of Period		$ 1,743	$ 2,001	$ 2,973
Additions charged to Costs and Expenses		(123)	130	(587)
Additions charged to Other Accounts		0	0	0
Deductions	[1]	193	(388)	(385)
Balance at End of Period		1,813	1,743	2,001
Inventory and other reserves
Valuation And Qualifying Accounts Disclosure [Line Items]
Balance at Beginning of Period		3,843	3,984	3,703
Additions charged to Costs and Expenses		8,710	7,906	7,823
Additions charged to Other Accounts		0	0	0
Deductions	[1]	(7,868)	(8,047)	(7,542)
Balance at End of Period		4,685	3,843	3,984
Tax valuation allowance
Valuation And Qualifying Accounts Disclosure [Line Items]
Balance at Beginning of Period		6,191	22,760	18,277
Additions charged to Costs and Expenses		709	1,893	11,515
Additions charged to Other Accounts		(40)	(403)	1,079
Deductions	[1]	(100)	(18,059)	(8,111)
Balance at End of Period		$ 6,760	$ 6,191	$ 22,760

[1] Primarily represents the utilization of established reserves, net of recoveries, where applicable.