Revenue Recognition - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 30, 2019	Mar. 31, 2018
Disaggregation of Revenue [Line Items]
Total revenue	$ 292,707	$ 202,681
United States
Disaggregation of Revenue [Line Items]
Total revenue	132,522	129,025
Other Americas
Disaggregation of Revenue [Line Items]
Total revenue	15,132	5,215
Europe, Middle East and Africa
Disaggregation of Revenue [Line Items]
Total revenue	98,992	59,199
Asia Pacific
Disaggregation of Revenue [Line Items]
Total revenue	46,061	9,242
Product
Disaggregation of Revenue [Line Items]
Revenue	223,007	171,629
Services
Disaggregation of Revenue [Line Items]
Revenue	69,700	31,052
Direct
Disaggregation of Revenue [Line Items]
Total revenue	248,196	188,462
Indirect
Disaggregation of Revenue [Line Items]
Total revenue	$ 44,511	$ 14,219