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Contingencies - Additional Information (Detail) - USD ($)	1 Months Ended	12 Months Ended
	Oct. 31, 2014	Mar. 26, 2016	Mar. 28, 2015
Contingencies [Line Items]
Guaranteed amount of private label credit card sales		$ 9,300,000	$ 6,800,000
Reserve associated with guaranteed credit card sales		$ 500,000	$ 200,000
Jewelry products purchased	$ 10,600,000
Minimum annual payments	$ 5,600,000
Purchase made to replenish jewelry products, Period of payment	90 days
Return of unsold Damiani products	$ 5,000,000
Renewed and Amended Distribution Agreement [Member]
Contingencies [Line Items]
Minimum annual payments	$ 1,000,000
Purchase made to replenish jewelry products, Period of payment	60 days
Exchangeable amount of unsold products permitted	$ 2,000,000
Return of unsold Damiani products	$ 4,000,000
Purchase [Member] | Prime Investments S.A. [Member] | Supplier Concentration Risk [Member]
Contingencies [Line Items]
Percentage of annualized cost basis		45.00%

X

- Definition

Aggregate cost of jewelry purchased.

+ References

No definition available.

+ Details

Name:	bgi_AggregateCostOfJewelryPurchased
Namespace Prefix:	bgi_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Aggregate minimum annual payments.

+ References

No definition available.

+ Details

Name:	bgi_AggregateMinimumAnnualPayments
Namespace Prefix:	bgi_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

Contingencies [Line Items]

+ References

No definition available.

+ Details

Name:	bgi_ContingenciesLineItems
Namespace Prefix:	bgi_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Credit term for payment.

+ References

No definition available.

+ Details

Name:	bgi_CreditTermForPayment
Namespace Prefix:	bgi_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Permitted exchangeable amount of unsold product.

+ References

No definition available.

+ Details

Name:	bgi_PermittedExchangeableAmountOfUnsoldProduct
Namespace Prefix:	bgi_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

Right to return unsold products under agreement value.

+ References

No definition available.

+ Details

Name:	bgi_RightToReturnUnsoldProductsUnderAgreementValue
Namespace Prefix:	bgi_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 275
-SubTopic 10
-Section 50
-Paragraph 18
-URI http://asc.fasb.org/extlink&oid=51801978&loc=d3e6351-108592

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 20
-URI http://asc.fasb.org/extlink&oid=49121117&loc=d3e13531-108611

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 275
-SubTopic 10
-Section 50
-Paragraph 20
-URI http://asc.fasb.org/extlink&oid=51801978&loc=d3e6404-108592

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 21
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=49121117&loc=d3e13537-108611

+ Details

Name:	us-gaap_ConcentrationRiskPercentage1
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

A valuation allowance for financing receivables that are expected to be uncollectible.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 11B
-Subparagraph (c)(1)
-URI http://asc.fasb.org/extlink&oid=49124121&loc=SL6953423-111524

+ Details

Name:	us-gaap_FinancingReceivableAllowanceForCreditLosses
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

Maximum potential amount of future payments (undiscounted) the guarantor could be required to make under the guarantee or each group of similar guarantees before reduction for potential recoveries under recourse or collateralization provisions.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 460
-SubTopic 10
-Section 50
-Paragraph 4
-Subparagraph (b)(1)
-URI http://asc.fasb.org/extlink&oid=6851643&loc=d3e12069-110248

+ Details

Name:	us-gaap_GuaranteeObligationsMaximumExposure
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Details

Name:	us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=bgi_AmendedAgreementMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_ConcentrationRiskByBenchmarkAxis=bgi_PurchaseMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=bgi_PrimeInvestmentsSaMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_ConcentrationRiskByTypeAxis=us-gaap_SupplierConcentrationRiskMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: