No definition available.

Name:	ruth_ConsolidatedLeverageRatio
Namespace Prefix:	ruth_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Represents consolidated leverage ratio for restricted junior payments.

+ References

No definition available.

+ Details

Name:	ruth_ConsolidatedLeverageRatioForRestrictedJuniorPayments
Namespace Prefix:	ruth_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

The minimum liquidity required for debt instrument covenant.

+ References

No definition available.

+ Details

Name:	ruth_DebtInstrumentCovenantMinimumLiquidity
Namespace Prefix:	ruth_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Represents fixed charge coverage ratio.

+ References

No definition available.

+ Details

Name:	ruth_FixedChargeCoverageRatio
Namespace Prefix:	ruth_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Percentage points added to the reference rate to compute the variable rate on the debt instrument.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Date when the debt instrument is scheduled to be fully repaid, in YYYY-MM-DD format.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 470
-SubTopic 20
-Name Accounting Standards Codification
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-Publisher FASB
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Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
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-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480566/210-10-S99-1

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Data Type:	xbrli:dateItemType
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

The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(22))
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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
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-Subparagraph (SX 210.5-02.19(b),22(b))
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Name:	us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount of borrowing capacity currently available under the credit facility (current borrowing capacity less the amount of borrowings outstanding).

+ References

+ Details

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

- Definition

The fee, expressed as a percentage of the line of credit facility, for available but unused credit capacity under the credit facility.

+ References

No definition available.

+ Details

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Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Weighted average interest rate of long-term debt outstanding calculated at point in time.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Amount of cash inflow from contractual arrangement with the lender, including but not limited to, letter of credit, standby letter of credit and revolving credit arrangements.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 235
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08(f))
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-SubTopic 10
-Section 45
-Paragraph 14
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482740/230-10-45-14

+ Details

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

- Details

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- Details

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Name:	us-gaap_CreditFacilityAxis=ruth_SeniorCreditFacilityMember
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Note 5 - Long-term Debt (Details Textual) - USD ($) $ in Millions		1 Months Ended	3 Months Ended
	Oct. 18, 2021	May 05, 2023	Mar. 26, 2023
Amended And Restated Credit Agreement [Member] \| Wells Fargo Bank National Association And Other Lenders [Member]
Debt Instrument, Covenant, Minimum Liquidity	$ 25
Debt Instrument, Maturity Date	Oct. 18, 2026
Amended And Restated Credit Agreement [Member] \| Wells Fargo Bank National Association And Other Lenders [Member] \| Subsequent Event [Member]
Proceeds from Lines of Credit		$ 5
Amended And Restated Credit Agreement [Member] \| Wells Fargo Bank National Association And Other Lenders [Member] \| Minimum [Member]
Fixed Charge Coverage Ratio	1.25%
Consolidated Leverage Ratio for Restricted Junior Payments	2.50%
Amended And Restated Credit Agreement [Member] \| Wells Fargo Bank National Association And Other Lenders [Member] \| Maximum [Member]
Consolidated Leverage Ratio	3.00%
Senior Credit Facility [Member]
Long-Term Line of Credit			$ 15
Line of Credit Facility, Remaining Borrowing Capacity			$ 120
Long-Term Debt, Weighted Average Interest Rate, at Point in Time			6.10%
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage			0.20%
Letter of Credit [Member]
Letters of Credit Outstanding, Amount			$ 5
Long-Term Debt, Weighted Average Interest Rate, at Point in Time			1.60%
Letter of Credit [Member] \| Amended And Restated Credit Agreement [Member] \| Wells Fargo Bank National Association And Other Lenders [Member]
Line of Credit Facility, Maximum Borrowing Capacity	$ 10
Revolving Credit Facility [Member] \| Amended And Restated Credit Agreement [Member] \| Fed Funds Effective Rate Overnight Index Swap Rate [Member]
Debt Instrument, Basis Spread on Variable Rate	0.50%
Revolving Credit Facility [Member] \| Amended And Restated Credit Agreement [Member] \| London Interbank Offered Rate (LIBOR) 1 [Member]
Debt Instrument, Basis Spread on Variable Rate	1.00%
Revolving Credit Facility [Member] \| Amended And Restated Credit Agreement [Member] \| Minimum [Member] \| London Interbank Offered Rate (LIBOR) 1 [Member]
Debt Instrument, Basis Spread on Variable Rate	1.50%
Revolving Credit Facility [Member] \| Amended And Restated Credit Agreement [Member] \| Minimum [Member] \| Base Rate [Member]
Debt Instrument, Basis Spread on Variable Rate	0.50%
Revolving Credit Facility [Member] \| Amended And Restated Credit Agreement [Member] \| Maximum [Member] \| London Interbank Offered Rate (LIBOR) 1 [Member]
Debt Instrument, Basis Spread on Variable Rate	2.25%
Revolving Credit Facility [Member] \| Amended And Restated Credit Agreement [Member] \| Maximum [Member] \| Base Rate [Member]
Debt Instrument, Basis Spread on Variable Rate	1.25%
Revolving Credit Facility [Member] \| Amended And Restated Credit Agreement [Member] \| Wells Fargo Bank National Association And Other Lenders [Member]
Line of Credit Facility, Maximum Borrowing Capacity	$ 140
Revolving Credit Facility [Member] \| Amended And Restated Credit Agreement [Member] \| Wells Fargo Bank National Association And Other Lenders [Member] \| Subject To Satisfaction Of Certain Conditions And Lender Consent [Member]
Line of Credit Facility, Maximum Borrowing Capacity	200
Swingline Loans [Member] \| Amended And Restated Credit Agreement [Member] \| Wells Fargo Bank National Association And Other Lenders [Member]
Line of Credit Facility, Maximum Borrowing Capacity	$ 5