Annual report pursuant to Section 13 and 15(d)

Document And Entity Information

v3.7.0.1
Document And Entity Information - USD ($)
12 Months Ended
Dec. 25, 2016
Feb. 28, 2017
Jun. 26, 2016
Document Information [Line Items]      
Entity Registrant Name Ruths Hospitality Group, Inc.    
Entity Central Index Key 0001324272    
Trading Symbol ruth    
Current Fiscal Year End Date --12-25    
Entity Filer Category Accelerated Filer    
Entity Current Reporting Status Yes    
Entity Voluntary Filers No    
Entity Well-known Seasoned Issuer No    
Entity Public Float     $ 526,216,672
Document Type 10-K    
Document Period End Date Dec. 25, 2016    
Document Fiscal Year Focus 2016    
Document Fiscal Period Focus FY    
Amendment Flag false    
Common Stock [Member]      
Document Information [Line Items]      
Entity Common Stock, Shares Outstanding (in shares)   31,801,598  
Unvested Restricted Stock [Member]      
Document Information [Line Items]      
Entity Common Stock, Shares Outstanding (in shares)   1,249,315