Segment and Geographic Information - Schedule of Revenue from External Customers and Long-Lived Assets, by Geographical Areas (Detail) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jul. 01, 2018	Apr. 01, 2018	Dec. 31, 2017	Oct. 01, 2017	Jul. 02, 2017	Apr. 02, 2017	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue	$ 169,769	$ 183,325	$ 199,047	$ 173,484	$ 193,286	$ 232,221	$ 211,264	$ 169,567	$ 725,625	$ 806,338	$ 766,083
Long-lived assets	95,321				80,539				95,276	95,321	80,539
United States [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue									247,689	231,760	180,248
Long-lived assets	67,156				53,983				68,496	67,156	53,983
Europe [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue									227,738	311,914	328,826
Long-lived assets	23,948				22,437				21,691	23,948	22,437
Greater China [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue									115,061	123,708	108,738
Long-lived assets	1,482				1,594				1,487	1,482	1,594
Other [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue									135,137	138,956	148,271
Long-lived assets	$ 2,735				$ 2,525				$ 3,602	$ 2,735	$ 2,525