Goodwill and Intangible Assets - Schedule of Finite-lived Intangible Assets (Details) - USD ($) $ in Thousands		12 Months Ended
		Jan. 29, 2017	Jan. 31, 2016
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount, Excluding Fully Amortized Intangible Assets		$ 175,060	$ 178,340
Accumulated Amortization, Excluding Fully Amortized Intangible Assets		(113,287)	(89,910)
Net Carrying Amount		61,773	88,430
Core technologies
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount, Excluding Fully Amortized Intangible Assets		144,930	148,210
Accumulated Amortization, Excluding Fully Amortized Intangible Assets		(92,940)	(74,005)
Net Carrying Amount		$ 51,990	74,205
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, Excluding Fully Amortized Intangible Assets		$ 30,030	30,030
Accumulated Amortization, Excluding Fully Amortized Intangible Assets		(20,247)	(15,847)
Net Carrying Amount		$ 9,783	14,183
Customer relationships | Minimum
Finite-Lived Intangible Assets [Line Items]
Estimated useful life		5 years
Customer relationships | Maximum
Finite-Lived Intangible Assets [Line Items]
Estimated useful life		10 years
Technology licenses
Finite-Lived Intangible Assets [Line Items]
Estimated useful life		2 years
Gross Carrying Amount, Excluding Fully Amortized Intangible Assets	[1]	$ 100	100
Accumulated Amortization, Excluding Fully Amortized Intangible Assets	[1]	(100)	(58)
Net Carrying Amount	[1]	$ 0	$ 42

[1] Technology licenses relate to licensing agreements entered into by the Company that are used in research and development activities and have alternative future uses. Amortization expense related to technology licenses is reported as "Product development and engineering" in the Consolidated Statements of Income.