Goodwill and Intangible Assets - Schedule of Changes to Finite-Lived Intangible Assets (Details) - USD ($) $ in Thousands	12 Months Ended
	Jan. 29, 2017	Jan. 31, 2016
Finite-lived Intangible Assets [Roll Forward]
Beginning gross carrying amount	$ 184,940	$ 169,048
Purchased intangible assets		12,000
Transfers from in-process research and development		4,000
Other		(108)
Snowbush divestiture	(3,280)
Ending gross carrying value	$ 181,660	$ 184,940