v3.8.0.1
ASSET IMPAIRMENT, ESTIMATED LEASE TERMINATION AND OTHER CLOSING COSTS (Details)
$ in Thousands
 12 Months Ended
Dec. 31, 2017
USD ($)
restaurant
Jan. 01, 2017
USD ($)
Impaired Long-Lived Assets Held and Used [Line Items]    
Restaurants Closed | restaurant 13  
Depreciation and amortization $ 2,785 $ 2,873
Asset impairments, net 3,154 4,426
Asset impairment, estimated lease termination and other closing costs 6,816 4,788
Balance at Beginning of Period 594 609
Additions Charged To Cost And Expense   89
Valuation Allowances And Reserves Deductions   (104)
Balance at End of Period   594
Service Life [Member]    
Impaired Long-Lived Assets Held and Used [Line Items]    
Depreciation and amortization 870  
Lease Termination Charges [Member]    
Impaired Long-Lived Assets Held and Used [Line Items]    
Business exit costs 3,403  
Balance at Beginning of Period 594  
Additions Charged To Cost And Expense 3,150  
Valuation Allowances And Reserves Deductions (1,945)  
Balance at End of Period 1,799 594
Restaurant Closure Expenses [Member]    
Impaired Long-Lived Assets Held and Used [Line Items]    
Business exit costs $ 259 206
Software [Member]    
Impaired Long-Lived Assets Held and Used [Line Items]    
Business exit costs   $ 156