Discontinuation of Business Unit (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jul. 01, 2017	Jun. 30, 2018	Jul. 01, 2017
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Nonoperating expense	$ 116,279,000	$ 102,866,000	$ 215,697,000	$ 208,155,000
Impairment of acquired intangible assets	11,900,000	0	11,900,000	0
Restructuring charges	4,376,000	1,576,000	5,405,000	1,642,000
Product
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Cost of revenue	52,208,000	$ 40,749,000	$ 94,310,000	$ 82,363,000
Discontinued Operations | Millimeter Wave Business
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Nonoperating expense	24,300,000
Impairment of acquired intangible assets	11,900,000
Restructuring charges	4,100,000
Discontinued Operations | Millimeter Wave Business | Product
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Cost of revenue	$ 8,300,000