Business Combination - Intangible Assets Acquired (Details) - USD ($) $ in Thousands		12 Months Ended
	Oct. 01, 2018	Dec. 28, 2019	Dec. 29, 2018
Customer relationships and backlog
Acquired Finite-Lived Intangible Assets [Line Items]
Estimated Useful Life (Years)		5 years 9 months 18 days	6 years 6 months
Developed technology
Acquired Finite-Lived Intangible Assets [Line Items]
Estimated Useful Life (Years)		3 years 6 months	3 years 9 months 18 days
Telecom Holding Parent LLC
Acquired Finite-Lived Intangible Assets [Line Items]
Total	$ 200,700	$ 200,700
Telecom Holding Parent LLC | Customer relationships and backlog
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-lived assets	$ 111,400
Estimated Useful Life (Years)	8 years
Telecom Holding Parent LLC | Developed technology
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-lived assets	$ 70,550
Estimated Useful Life (Years)	5 years
Telecom Holding Parent LLC | Trade name
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-lived assets	$ 1,000
Estimated Useful Life (Years)	1 year
In-process technology | Telecom Holding Parent LLC
Acquired Finite-Lived Intangible Assets [Line Items]
Indefinite-lived assets	$ 17,750