Income Taxes - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Millions	6 Months Ended
	Jun. 28, 2020	Jun. 30, 2019	Dec. 31, 2019
Income Taxes [Line Items]
Tax savings due to the tax holiday	$ 13.6	$ 7.0
Tax savings due to the tax holiday, per share	$ 0.08	$ 0.04
Reduction in un recognized tax benefits	$ 1.1
Accrued interest and penalties	1.7		$ 1.4
Interest and penalties related to income tax, expense (benefit)	0.3	$ 0.1
Uncertain tax positions	21.4		$ 21.2
Net increase in reserves for uncertain tax positions	$ 0.2