Leases - Lease Costs (Details) - USD ($) $ in Thousands	12 Months Ended
	Feb. 01, 2020	Feb. 02, 2019	Feb. 03, 2018
Lessee, Lease, Description [Line Items]
Fixed operating lease expense	$ 52,709	$ 41,775	$ 35,578
Variable lease expense	2,438	2,339	1,552
Total lease expense	55,147	44,114	37,130
Cash paid for amounts included in the measurement of operating lease liabilities (in thousands)	$ 65,458
Weighted average remaining lease term (in years)	6 years 2 months
Weighted average interest rate	4.03%
COGS
Lessee, Lease, Description [Line Items]
Fixed operating lease expense	$ 51,184	40,868	34,925
Variable lease expense	2,352	2,339	1,552
Total lease expense	53,536	43,207	36,477
SG&A
Lessee, Lease, Description [Line Items]
Fixed operating lease expense	1,525	907	653
Variable lease expense	86	0	0
Total lease expense	$ 1,611	$ 907	$ 653