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Summary of Significant Accounting Policies - Supplemental Cash Flow Information (Detail) - USD ($) $ in Thousands	6 Months Ended
	Jun. 29, 2019	Jun. 30, 2018	Dec. 29, 2018	Dec. 30, 2017
Accounting Policies [Abstract]
Interest	$ 73	$ 229
Income taxes	26,975	21,771
Capitalized operating leases	3,409	0
ROU assets obtained in exchange for lease liabilities(1)	24,093	0
Unpaid purchases of property, plant and equipment	1,216	663
Unsettled common stock proceeds from option exercises	283	0
Cash and cash equivalents	588,800
Restricted cash	155	147
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents	$ 408,939	$ 429,794	$ 552,641	$ 315,483

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