Share-Based Compensation - Allocation of Stock-based Compensation (Details) - USD ($) $ in Thousands	12 Months Ended
	Jan. 31, 2021	Jan. 26, 2020	Jan. 27, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation	$ 52,986	$ 52,049	$ 66,837
Net sales revenue
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation	0	0	21,501
Cost of sales
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation	2,501	1,928	1,639
Selling, general and administrative expenses
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation	37,000	38,556	35,430
Product development and engineering
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation	$ 13,485	$ 11,565	$ 8,267