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Document And Entity Information - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jul. 01, 2018
Jul. 02, 2017
Jul. 01, 2018
Jul. 02, 2017
Aug. 01, 2018
Document Information [Line Items]          
Stock-based compensation $ 1,385 $ 903 $ 2,970 $ 1,786  
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-Q    
Document Period End Date     Jul. 01, 2018    
Document Fiscal Year Focus     2018    
Document Fiscal Period Focus     Q2    
Amendment Flag     false    
Entity Common Stock, Shares Outstanding         36,538,903