Quarterly report pursuant to Section 13 or 15(d)

Basis of Presentation and Recent Accounting Pronouncements (Details)

v3.2.0.727
Basis of Presentation and Recent Accounting Pronouncements (Details)
$ / shares in Units, $ in Thousands
3 Months Ended 4 Months Ended 6 Months Ended
Jul. 12, 2015
USD ($)
state
province
restaurant
$ / shares
Jul. 13, 2014
USD ($)
$ / shares
Apr. 19, 2015
USD ($)
$ / shares
Apr. 20, 2014
Jul. 12, 2015
USD ($)
state
province
restaurant
segment
$ / shares
Jul. 13, 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 112 days 112 days 196 days 196 days
Gift card breakage revenue recognized     $ 1,400      
Net income $ 11,166 $ 9,470     $ 27,731 $ 21,414
Earnings per share, diluted (in dollars per share) | $ / shares $ 0.78 $ 0.65     $ 1.94 $ 1.47
Company-owned operated restaurants            
Franchisor Disclosure [Line Items]            
Number of restaurants | restaurant 422       422  
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