Quarterly report pursuant to Section 13 or 15(d)

Basis of Presentation and Recent Accounting Pronouncements (Details)

v3.3.0.814
Basis of Presentation and Recent Accounting Pronouncements (Details)
$ / shares in Units, $ in Thousands
 3 Months Ended 4 Months Ended 9 Months Ended
Oct. 04, 2015
USD ($)
state
province
restaurant
$ / shares
Jul. 12, 2015
Oct. 05, 2014
USD ($)
$ / shares
Jul. 13, 2014
Apr. 19, 2015
USD ($)
$ / shares
Apr. 20, 2014
Oct. 04, 2015
USD ($)
state
province
restaurant
segment
$ / shares
Oct. 05, 2014
USD ($)
$ / shares
Franchisor Disclosure [Line Items]                
Number of operating segments | segment             1  
Number of reportable segments | segment             1  
Length of fiscal period 84 days 84 days 84 days 84 days 112 days 112 days 280 days 280 days
Gift card breakage revenue recognized         $ 1,400      
Net income $ 8,282   $ 7,208       $ 36,013 $ 28,622
Earnings per share, diluted (in dollars per share) | $ / shares $ 0.58   $ 0.50       $ 2.52 $ 1.97
Company-owned operated restaurants                
Franchisor Disclosure [Line Items]                
Number of restaurants | restaurant 428           428  
Number of states in which restaurants are located | state 38           38  
Number of Canadian provinces in which restaurants are located | province 2           2  
Franchised restaurants                
Franchisor Disclosure [Line Items]                
Number of restaurants | restaurant 99           99  
Number of states in which restaurants are located | state 15           15  
Change in accounting estimate                
Franchisor Disclosure [Line Items]                
Net income         $ 900      
Earnings per share, diluted (in dollars per share) | $ / shares         $ 0.06