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Reconciliation of Provision for Income Taxes at Statutory Federal Income Tax Rate Compared to Provision for Income Taxes (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 28, 2020	Dec. 30, 2019	Dec. 31, 2018
Income Tax Disclosure [Abstract]
Statutory federal income tax benefit (provision)	$ 9,718	$ (7,209)	$ (9,909)
State income taxes, net of federal benefit and state tax credits	(2,674)	(3,163)	(1,953)
Transfer pricing			1,483
Acquisition related expenses			(1,737)
IRC Section 162(m) limitation	(712)	(868)	(3,702)
Stock options	(1,298)	(252)	1,072
Global Intangible Low-Taxed Income	(1,300)
Permanently reinvested earnings assertion	(1,442)	(1,765)	(14,313)
Foreign tax differential on foreign earnings & other permanent items	3,933	687	(3,685)
Change in valuation allowance	(2,668)	2,127	118,451
Uncertain tax positions	36,936	999	(954)
Federal research and development credits	4,250	4,582	2,996
Goodwill impairment	(14,532)
Other	(320)	2,457	458
Income tax benefit (provision)	$ 29,891	$ (2,405)	$ 88,207

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