Stock-Based Compensation - Allocation of Stock-based Compensation (Details) - USD ($) $ in Thousands	12 Months Ended
	Jan. 31, 2016	Jan. 25, 2015	Jan. 26, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation	$ 20,468	$ 29,629	$ 24,589
Net change in stock-based compensation capitalized into inventory	(98)	111	36
Cost of sales
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation	1,555	1,621	1,664
Selling, general and administrative expenses
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation	10,055	17,387	12,071
Product development and engineering
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation	$ 8,858	$ 10,621	$ 10,854