Accrued Expenses and Other Current Liabilities - Major Components of Accrued Expenses and Other Current Liabilities (Details) - USD ($) $ in Thousands	Feb. 01, 2020	Feb. 02, 2019	Feb. 03, 2018
Accrued expenses and other current liabilities [Abstract]
Outstanding checks and payables	$ 97,610	$ 58,840
Employee compensation	70,481	77,663
Insurance reserves	48,457	47,813
BJ’s Perks rewards	35,952	34,083
Sales, property, use and other taxes	32,442	29,050
Utilities, advertising and accrued interest	16,166	16,177
Other	27,897	22,134
Fixed asset accruals	11,247	13,849
Membership fee income sales and legal reserves	10,858	12,744
Repairs and maintenance	9,993	11,808
Accrued federal and state income taxes	6,662	858
Professional services	5,445	20,197
Total	547,876	506,431
Membership
Accrued expenses and other current liabilities [Abstract]
Deferred income	143,969	134,415	$ 126,216
Other
Accrued expenses and other current liabilities [Abstract]
Deferred income	$ 30,697	$ 26,800