Share-Based Compensation - Share-based Compensation Expense (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 31, 2020	Nov. 02, 2019	Oct. 31, 2020	Nov. 02, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation expense	$ 4,740	$ 5,185	$ 14,529	$ 14,639
Stock options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation expense	1,006	829	2,521	2,116
Stock awards/units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation expense	3,693	4,298	11,754	12,318
Employee Stock Purchase Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation expense	$ 41	$ 58	$ 254	$ 205