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Summary of Significant Accounting Policies - Supplemental Cash Flow Information (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 28, 2020	Mar. 30, 2019	Dec. 28, 2019	Dec. 29, 2018
Accounting Policies [Abstract]
Interest expense	$ 66	$ 13
Income taxes	3,886	2,157
Operating lease liabilities	1,463	1,748
ROU assets obtained in exchange for lease liabilities	8,144	22,983
Unpaid purchases of property, plant and equipment	4,240	1,127
Unsettled common stock proceeds from option exercises	466	583
Cash and cash equivalents	605,916	412,861	$ 567,687
Restricted cash	376	149
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents	$ 606,292	$ 413,010	$ 568,075	$ 552,641

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