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Supplemental Cash Flow Information (Details) - USD ($) $ in Thousands	3 Months Ended
	May 01, 2021	May 02, 2020	Jan. 30, 2021
Supplemental Cash Flow Elements [Abstract]
Non-cash investing activities - change in unpaid purchases of property, plant and equipment	$ 9	$ 326
Current liability for unpaid purchases of property, plant and equipment	710		$ 719
Cash paid for income taxes	$ 230	$ (418)

X

- Definition

The portion of accounts payable that is owed to property, plant and equipment vendors, including construction contractors, which is scheduled for payment within twelve months after the balance sheet date, and which will be reported in investing activities when paid.

+ References

No definition available.

+ Details

Name:	bke_AccountsPayableCapitalExpendituresCurrent
Namespace Prefix:	bke_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

The net change during the period in the carrying amount of liabilities that arose from prior and current period purchases of property plant and equipment.

+ References

No definition available.

+ Details

Name:	bke_NonCashInvestingActivitiesIncreaseDecreaseInUnpaidPurchasesOfPropertyPlantAndEquipment
Namespace Prefix:	bke_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

The amount of cash paid during the current period to foreign, federal, state, and local authorities as taxes on income, net of any cash received during the current period as refunds for the overpayment of taxes.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=123431023&loc=d3e4297-108586

+ Details

Name:	us-gaap_IncomeTaxesPaidNet
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- References

No definition available.

+ Details

Name:	us-gaap_SupplementalCashFlowElementsAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration