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RELATED PARTY TRANSACTIONS - Tax Receivable Agreement (Details) - USD ($)	12 Months Ended
	Dec. 31, 2025	Dec. 25, 2024	Dec. 27, 2023
Related Party Transactions [Abstract]
Amounts paid under the Tax Receivable Agreement	$ 37,000	$ 0	$ 0
Amounts due under the Tax Receivable Agreement	$ 246,835,000	$ 247,734,000

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- Definition

Tax Receivable Agreement Liability, Current and Noncurrent

+ References

No definition available.

+ Details

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

X

- Definition

Tax receivable agreement payments to related parties.

+ References

No definition available.

+ Details

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

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- References

No definition available.

+ Details

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