Goodwill and Intangible Assets - Schedule of Finite-Lived Intangible Assets (Details) - USD ($) $ in Thousands	6 Months Ended
	Jul. 28, 2019	Jan. 27, 2019
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	$ 94,089	$ 201,961
Accumulated amortization	(68,883)	(167,703)
Total expected amortization expense	25,206	34,258
Core Technologies [Member]
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	88,088	167,930
Accumulated amortization	(64,337)	(136,544)
Total expected amortization expense	$ 23,751	31,386
Core Technologies [Member] | Minimum
Finite-Lived Intangible Assets [Line Items]
Estimated useful life	5 years
Core Technologies [Member] | Maximum
Finite-Lived Intangible Assets [Line Items]
Estimated useful life	8 years
Customer Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	$ 6,001	34,031
Accumulated amortization	(4,546)	(31,159)
Total expected amortization expense	$ 1,455	$ 2,872
Customer Relationships [Member] | Minimum
Finite-Lived Intangible Assets [Line Items]
Estimated useful life	3 years
Customer Relationships [Member] | Maximum
Finite-Lived Intangible Assets [Line Items]
Estimated useful life	10 years