XML 56 R44.htm IDEA: XBRL DOCUMENT v3.20.2

Subsequent Event - Additional Information (Detail) - $ / shares	3 Months Ended
	Sep. 27, 2020	Mar. 29, 2020
Subsequent Event [Line Items]
Dividend per share		$ 0.05
Scenario Forecast [Member]
Subsequent Event [Line Items]
Dividend per share	$ 0.10
Dividend declared per share, payable date	Sep. 15, 2020
Dividend declared per share, record date	Sep. 01, 2020
Reinstated cash dividend per share	$ 0.05
Additional cash dividend per share	$ 0.05

X

- Definition

Additional cash dividend per share.

+ References

No definition available.

+ Details

Name:	bgfv_AdditionalCashDividendPerShare
Namespace Prefix:	bgfv_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Reinstated cash dividend per share.

+ References

No definition available.

+ Details

Name:	bgfv_ReinstatedCashDividendPerShare
Namespace Prefix:	bgfv_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Date the declared dividend will be paid, in CCYY-MM-DD format.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 50
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=121583591&loc=d3e4304-108586

+ Details

Name:	us-gaap_DividendPayableDateToBePaidDayMonthAndYear
Namespace Prefix:	us-gaap_
Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration

X

- Definition

The per share amount of a dividend declared, but not paid, as of the financial reporting date.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 50
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=121583591&loc=d3e4304-108586

+ Details

Name:	us-gaap_DividendsPayableAmountPerShare
Namespace Prefix:	us-gaap_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Date the holder must own the stock to be entitled to the dividend, in CCYY-MM-DD format.

+ References

No definition available.

+ Details

Name:	us-gaap_DividendsPayableDateOfRecordDayMonthAndYear
Namespace Prefix:	us-gaap_
Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event.

+ References

No definition available.

+ Details

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

X

- Details

Name:	srt_StatementScenarioAxis=srt_ScenarioForecastMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: