Goodwill and Intangible Assets - Schedule of Amortization Expenses Recorded in the Statements of Income (Details) - USD ($) $ in Thousands	12 Months Ended
	Jan. 28, 2018	Jan. 29, 2017	Jan. 31, 2016
Schedule of Goodwill and Intangible Assets [Line Items]
Intangible amortization	$ 27,867	$ 25,301	$ 25,059
Core technologies
Schedule of Goodwill and Intangible Assets [Line Items]
Intangible amortization	22,688	20,901	20,692
Customer relationships
Schedule of Goodwill and Intangible Assets [Line Items]
Intangible amortization	$ 5,179	$ 4,400	$ 4,367