Geographical Information - Revenue by Geographic Area (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 30, 2016	Dec. 25, 2015	Dec. 26, 2014
Revenues From External Customers And Long Lived Assets [Line Items]
Sales	$ 562,759	$ 469,103	$ 513,957
United States [Member]
Revenues From External Customers And Long Lived Assets [Line Items]
Sales	308,129	313,090	372,200
China [Member]
Revenues From External Customers And Long Lived Assets [Line Items]
Sales	13,152	21,464	64,376
Singapore [Member]
Revenues From External Customers And Long Lived Assets [Line Items]
Sales	175,843	103,176	55,491
Austria [Member]
Revenues From External Customers And Long Lived Assets [Line Items]
Sales	35,729	12,568
Other [Member]
Revenues From External Customers And Long Lived Assets [Line Items]
Sales	$ 29,906	$ 18,805	$ 21,890