Establishment of Liabilities Under Tax Receivable Agreement

No definition available.

Name:	shak_EstablishmentofLiabilitiesUnderTaxReceivableAgreement
Namespace Prefix:	shak_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Tax Receivable Agreement Liability, Current and Noncurrent

+ References

No definition available.

+ Details

Name:	shak_TaxReceivableAgreementLiabilityCurrentandNoncurrent
Namespace Prefix:	shak_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Tax Receivable Agreement, Percentage of Tax Benefits Due to Equity Owners

+ References

No definition available.

+ Details

Name:	shak_TaxReceivableAgreementPercentageofTaxBenefitsDuetoEquityOwners
Namespace Prefix:	shak_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Period of time between issuance and maturity of debt instrument, in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

No definition available.

+ Details

Name:	us-gaap_DebtInstrumentTerm
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

The total amount of the contingent obligation under letters of credit outstanding as of the reporting date.

+ References

No definition available.

+ Details

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

- Definition

Amount of litigation expense, including but not limited to legal, forensic, accounting, and investigative fees.

+ References

No definition available.

+ Details

Name:	us-gaap_LitigationSettlementExpense
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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

- Definition

Amount of loss contingency liability.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 450
-SubTopic 20
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=121557415&loc=d3e14326-108349

+ Details

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

- Details

Name:	us-gaap_PropertyPlantAndEquipmentByTypeAxis=srt_RetailSiteMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_PropertyPlantAndEquipmentByTypeAxis=srt_OfficeBuildingMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

COMMITMENTS AND CONTINGENCIES (Details) - USD ($)	1 Months Ended	3 Months Ended
COMMITMENTS AND CONTINGENCIES (Details) - USD ($)	Feb. 28, 2018	Mar. 31, 2021	Mar. 25, 2020	Dec. 30, 2020	Sep. 30, 2017
Loss Contingencies [Line Items]
Litigation Settlement, Expense	$ 1,200,000	$ 595,000
Loss Contingency Accrual		$ 1,180,000
Percentage of tax benefits due to equity owners		85.00%
Establishment of liabilities under tax receivable agreement		$ 1,094,000	$ 310,000
Tax receivable agreement liability		234,048,000		$ 232,954,000
Retail site
Loss Contingencies [Line Items]
Letters of credit outstanding		$ 130,000
Office building
Loss Contingencies [Line Items]
Letters of credit outstanding					$ 603,000
Renewal term		1 year