Valuation and Qualifying Accounts and Reserves (Detail) - USD ($) $ in Thousands		12 Months Ended
		Dec. 30, 2017	Dec. 31, 2016	Jan. 02, 2016
Allowance for doubtful accounts
Valuation And Qualifying Accounts Disclosure [Line Items]
Balance at Beginning of Period		$ 2,973	$ 2,226	$ 3,287
Additions charged to Costs and Expenses		(587)	363	(446)
Additions charged to Other Accounts		0	384	0
Deductions	[1]	(385)	0	(615)
Balance at End of Period		2,001	2,973	2,226
Inventory and other reserves
Valuation And Qualifying Accounts Disclosure [Line Items]
Balance at Beginning of Period		3,703	4,065	7,107
Additions charged to Costs and Expenses		7,823	5,109	7,593
Additions charged to Other Accounts		0	0	0
Deductions	[1]	(7,542)	(5,471)	(10,635)
Balance at End of Period		3,984	3,703	4,065
Tax valuation allowance
Valuation And Qualifying Accounts Disclosure [Line Items]
Balance at Beginning of Period		18,277	28,280	34,640
Additions charged to Costs and Expenses		11,515	2,258	1,056
Additions charged to Other Accounts		1,079	(483)	(2,631)
Deductions	[1]	(8,111)	(11,778)	(4,785)
Balance at End of Period		$ 22,760	$ 18,277	$ 28,280

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