Document And Entity Information - USD ($)
12 Months Ended
Dec. 30, 2018
Feb. 26, 2019
Jul. 01, 2018
Document And Entity Information [Abstract]      
Entity Registrant Name CARROLS RESTAURANT GROUP, INC.    
Entity Central Index Key 0000809248    
Current Fiscal Year End Date --12-30    
Entity Filer Category Accelerated Filer    
Document Type 10-K    
Document Period End Date Dec. 30, 2018    
Document Fiscal Year Focus 2018    
Document Fiscal Period Focus FY    
Amendment Flag false    
Entity Common Stock, Shares Outstanding   37,003,873  
Entity Current Reporting Status Yes    
Entity Voluntary Filers No    
Entity Well-known Seasoned Issuer No    
Entity Public Float     $ 505,346,703