SUPPLEMENTARY FINANCIAL INFORMATION - Summary of Certain Balance Sheet Accounts (Details) - USD ($) $ in Thousands	Nov. 01, 2020	Feb. 02, 2020
Inventories:
Inventories, at cost	$ 804,541	$ 540,580
Provision to reduce inventories to net realizable value	(33,551)	(22,067)
Total inventories	770,990	518,513
Prepaid expenses and other current assets:
Prepaid expenses	91,097	64,568
Forward currency contract assets	7,491	1,735
Government payroll subsidy receivables	13,309	0
Other current assets	8,301	4,239
Prepaid expenses and other current assets	120,198	70,542
Property and equipment, net:
Land	71,322	71,829
Buildings	30,045	30,187
Leasehold improvements	555,337	489,202
Furniture and fixtures	113,294	109,533
Computer hardware	108,384	95,399
Computer software	394,614	336,768
Equipment and vehicles	15,511	19,521
Work in progress	66,350	40,930
Property and equipment, gross	1,354,857	1,193,369
Accumulated depreciation	(634,977)	(521,676)
Total property and equipment	719,880	671,693
Other non-current assets:
Cloud computing arrangement implementation costs	60,740	24,648
Security deposits	22,879	19,901
Other	9,052	11,652
Total other non-current assets	92,671	56,201
Other accrued liabilities
Accrued freight and other operating expenses	94,716	43,225
Accrued duty	19,641	16,178
Sales return allowances	23,923	12,897
Sales tax collected	16,173	17,370
Accrued capital expenditures	10,685	5,457
Forward currency contract liabilities	9,688	1,920
Accrued rent	6,449	8,356
Other	9,091	7,238
Other accrued liabilities	$ 190,366	$ 112,641