Quarterly report pursuant to Section 13 or 15(d)

Document and Entity Information

v3.21.2
Document and Entity Information - shares
9 Months Ended
Sep. 26, 2021
Oct. 25, 2021
Document Information [Line Items]    
Entity Registrant Name Ruth’s Hospitality Group, Inc.  
Entity Central Index Key 0001324272  
Trading Symbol RUTH  
Current Fiscal Year End Date --12-26  
Entity Filer Category Accelerated Filer  
Document Type 10-Q  
Document Period End Date Sep. 26, 2021  
Document Fiscal Year Focus 2021  
Document Fiscal Period Focus Q3  
Amendment Flag false  
Entity Shell Company false  
Entity Small Business false  
Entity Emerging Growth Company false  
Entity Current Reporting Status Yes  
Entity File Number 000-51485  
Entity Tax Identification Number 72-1060618  
Entity Address, Address Line One 1030 W. Canton Avenue  
Entity Address, Address Line Two Suite 100  
Entity Address, City or Town Winter Park  
Entity Address, State or Province FL  
Entity Address, Postal Zip Code 32789  
City Area Code 407  
Local Phone Number 333-7440  
Entity Interactive Data Current Yes  
Document Quarterly Report true  
Document Transition Report false  
Title of 12(b) Security Common Stock, par value $0.01 per share  
Security Exchange Name NASDAQ  
Entity Incorporation, State or Country Code DE  
Common Stock [Member]    
Document Information [Line Items]    
Entity Common Stock, Shares Outstanding (in shares)   34,316,618
Unvested Restricted Stock [Member]    
Document Information [Line Items]    
Entity Common Stock, Shares Outstanding (in shares)   557,995