Quarterly report pursuant to Section 13 or 15(d)

Segment Reporting (Narrative) (Details)

v3.10.0.1
Segment Reporting (Narrative) (Details)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2018
USD ($)
state
store
customer
Jun. 30, 2017
USD ($)
customer
Jun. 30, 2018
USD ($)
state
store
customer
segment
Jun. 30, 2017
USD ($)
customer
Dec. 31, 2017
USD ($)
store
Dec. 31, 2016
USD ($)
Segment Reporting Information [Line Items]            
Minimum number of operating segments with similar characteristics to be considered as a reportable segment | segment     1      
Revenues $ 243,226 $ 217,666 [1] $ 461,268 $ 403,100 [1]    
Property and equipment, net $ 125,325   $ 125,325   $ 111,929 [1] $ 95,408
IT'SUGAR, LLC [Member]            
Segment Reporting Information [Line Items]            
Number of retail locations | store 96   96      
Number of states of retail locations | state 26   26      
MOD Super-Fast Pizza [Member]            
Segment Reporting Information [Line Items]            
Number of retail locations | store         2  
Number of stores opened | store     2      
Reportable Segments [Member] | Renin [Member]            
Segment Reporting Information [Line Items]            
Number of major customers | customer 2 2 2 2    
Revenues $ 16,890 $ 17,766 $ 31,875 $ 34,983    
Reportable Segments [Member] | Renin [Member] | Customer Concentration Risk [Member]            
Segment Reporting Information [Line Items]            
Revenues 8,300 8,400 16,800 16,600    
Reportable Segments [Member] | Outside United States [Member] | Renin [Member]            
Segment Reporting Information [Line Items]            
Revenues 5,300 4,500 9,900 10,800    
Property and equipment, net $ 2,200 $ 2,300 $ 2,200 $ 2,300    
[1] See Note 1 for a summary of adjustments.