Goodwill and Intangible Assets - Schedule of Finite-Lived Intangible Assets (Details) - USD ($) $ in Thousands	3 Months Ended
	Apr. 26, 2020	Jan. 26, 2020
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 47,300	$ 88,857
Accumulated Amortization	(30,128)	(68,845)
Total expected amortization expense	17,172	20,012
Core technologies
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	43,300	82,857
Accumulated Amortization	(26,350)	(63,434)
Total expected amortization expense	$ 16,950	19,423
Core technologies | Minimum
Finite-Lived Intangible Assets [Line Items]
Estimated useful life	3 years
Core technologies | Maximum
Finite-Lived Intangible Assets [Line Items]
Estimated useful life	8 years
Customer relationships
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 4,000	6,000
Accumulated Amortization	(3,778)	(5,411)
Total expected amortization expense	$ 222	$ 589
Customer relationships | Minimum
Finite-Lived Intangible Assets [Line Items]
Estimated useful life	3 years
Customer relationships | Maximum
Finite-Lived Intangible Assets [Line Items]
Estimated useful life	3 years