Revenue Recognition - Summary of Revenue by Geographic Area (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 28, 2019	Jun. 29, 2018	Jun. 28, 2019	Jun. 29, 2018
Revenues From External Customers And Long Lived Assets [Line Items]
Revenues	$ 265,367	$ 290,213	$ 525,508	$ 605,055
United States [Member]
Revenues From External Customers And Long Lived Assets [Line Items]
Revenues	133,000	159,187	270,254	343,962
China [Member]
Revenues From External Customers And Long Lived Assets [Line Items]
Revenues	12,422	16,812	20,430	18,978
Singapore [Member]
Revenues From External Customers And Long Lived Assets [Line Items]
Revenues	75,881	82,904	144,153	185,537
Austria [Member]
Revenues From External Customers And Long Lived Assets [Line Items]
Revenues	10,308	16,393	24,583	29,929
Korea [Member]
Revenues From External Customers And Long Lived Assets [Line Items]
Revenues	17,733		36,119
Other [Member]
Revenues From External Customers And Long Lived Assets [Line Items]
Revenues	$ 16,023	$ 14,917	$ 29,969	$ 26,649