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Credit Facility (Details) - USD ($)
$ in Thousands
9 Months Ended
Oct. 14, 2015
Sep. 26, 2015
Sep. 27, 2014
Dec. 27, 2014
Line of Credit Facility [Line Items]        
Line of credit, repayment of outstanding balance   $ 72,000 $ 60,000  
Revolving Credit Facility [Member]        
Line of Credit Facility [Line Items]        
Line of credit, maximum borrowing capacity   100,000    
Line of credit, amount drawn   $ 30,000   $ 0
Subsequent Event [Member] | Revolving Credit Facility [Member]        
Line of Credit Facility [Line Items]        
Line of credit, repayment of outstanding balance $ 5,000      
Minimum [Member] | Revolving Credit Facility [Member]        
Line of Credit Facility [Line Items]        
Line of credit, margin rate   1.75%    
Maximum [Member] | Revolving Credit Facility [Member]        
Line of Credit Facility [Line Items]        
Line of credit, maximum borrowing capacity   $ 150,000    
Line of credit, margin rate   2.25%