Annual report pursuant to Section 13 and 15(d)

Related Party Transactions (Narrative)(Details)

v3.8.0.1
Related Party Transactions (Narrative)(Details)
$ in Thousands
12 Months Ended
Dec. 31, 2017
USD ($)
Restaurant
Dec. 25, 2016
USD ($)
Dec. 27, 2015
USD ($)
Related Party Transaction [Line Items]      
Number of Restaurants | Restaurant 6    
Management fees received | $ $ 40 $ 40 $ 40