Geographical Information - Revenue by Geographic Area (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 25, 2016
Revenues From External Customers And Long Lived Assets [Line Items]
Sales	$ 204,594	$ 112,229
United States [Member]
Revenues From External Customers And Long Lived Assets [Line Items]
Sales	104,356	65,839
China [Member]
Revenues From External Customers And Long Lived Assets [Line Items]
Sales	12,947	3,447
Singapore [Member]
Revenues From External Customers And Long Lived Assets [Line Items]
Sales	60,240	32,684
Austria [Member]
Revenues From External Customers And Long Lived Assets [Line Items]
Sales	11,221	8,502
Other [Member]
Revenues From External Customers And Long Lived Assets [Line Items]
Sales	$ 15,830	$ 1,757