Leases - Lease costs (Details) - USD ($) $ in Thousands	12 Months Ended
	Jan. 31, 2021	Feb. 02, 2020
Leases [Abstract]
Fixed operating lease cost	$ 37,411	$ 33,800
Variable lease cost	9,168	8,097
Short-term lease cost (12 months or less)	5,734	5,537
Total lease cost	$ 52,313	$ 47,434