Goodwill and Intangible Assets - Schedule of Finite-lived Intangible Assets (Details) - USD ($) $ in Thousands	12 Months Ended
	Jan. 28, 2018	Jan. 29, 2017
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 198,961	$ 174,960
Accumulated Amortization	(141,054)	(113,187)
Net Carrying Amount	57,907	61,773
Core technologies
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	164,930	144,930
Accumulated Amortization	(115,628)	(92,940)
Net Carrying Amount	$ 49,302	51,990
Core technologies | Minimum
Finite-Lived Intangible Assets [Line Items]
Estimated useful life	5 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	$ 34,031	30,030
Accumulated Amortization	(25,426)	(20,247)
Net Carrying Amount	$ 8,605	$ 9,783
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	10 years