Annual report pursuant to Section 13 and 15(d)

Document And Entity Information

v2.4.1.9
Document And Entity Information (USD $)
12 Months Ended
Dec. 28, 2014
Jun. 29, 2014
Mar. 01, 2015
Document Information [Line Items]      
Entity Registrant Name Ruths Hospitality Group, Inc.    
Document Type 10-K    
Current Fiscal Year End Date --12-28    
Entity Public Float   $ 431,858,059dei_EntityPublicFloat  
Amendment Flag false    
Entity Central Index Key 0001324272    
Entity Current Reporting Status Yes    
Entity Voluntary Filers No    
Entity Filer Category Accelerated Filer    
Entity Well-known Seasoned Issuer No    
Document Period End Date Dec. 28, 2014    
Document Fiscal Year Focus 2014    
Document Fiscal Period Focus FY    
Unvested Restricted Stock [Member]      
Document Information [Line Items]      
Entity Common Stock, Shares Outstanding     569,275dei_EntityCommonStockSharesOutstanding
/ us-gaap_StatementClassOfStockAxis
= ruth_UnvestedRestrictedStockMember
Common Stock [Member]      
Document Information [Line Items]      
Entity Common Stock, Shares Outstanding     34,775,906dei_EntityCommonStockSharesOutstanding
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonStockMember