Share-Based Compensation - Allocation of Stock-based Compensation (Details) - USD ($) $ in Thousands	12 Months Ended
	Jan. 29, 2017	Jan. 31, 2016	Jan. 25, 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation	$ 30,828	$ 20,468	$ 29,629
Net change in share-based compensation capitalized into inventory	38	(98)	111
Revenue offset
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation	5,396	0	0
Cost of sales
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation	1,591	1,555	1,621
Selling, general and administrative expenses
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation	18,019	10,055	17,387
Product development and engineering
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation	$ 5,822	$ 8,858	$ 10,621