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Credit Agreement (Details)
12 Months Ended
Dec. 26, 2015
USD ($)
Dec. 26, 2015
USD ($)
Dec. 27, 2014
USD ($)
Sep. 27, 2014
USD ($)
Line of Credit Facility        
Debt Instrument, Basis Spread on Variable Rate 0.50%      
Senior Credit Facility amount outstanding $ 150,000,000 $ 150,000,000 $ 0 $ 0
Letters of credit outstanding $ 48,700,000 48,700,000 $ 40,700,000  
Line of credit unused capacity fee percentage (in hundredths) 0.10%      
Compensating Balance, Amount $ 0 $ 0    
Number of material covenants requiring quarterly compliance   2    
Credit agreement covenant terms   The fixed charge coverage ratio compared earnings before interest, taxes, depreciation, amortization, stock compensation and rent expense (“consolidated EBITDAR”) to the sum of interest paid and rental expense (excluding any straight-line rent adjustments).  The leverage ratio compared total debt plus rental expense (excluding any straight-line rent adjustments) multiplied by a factor of six to consolidated EBITDAR.  The 2011 Senior Credit Facility also contained certain other restrictions regarding additional indebtedness, capital expenditures, business operations, guarantees, investments, mergers, consolidations and sales of assets, transactions with subsidiaries or affiliates, and liens.    
Minimum        
Line of Credit Facility        
Debt Instrument, Basis Spread on Variable Rate 0.50% 0.40%    
Line of credit unused capacity fee percentage (in hundredths) 0.075% 0.08%    
Maximum        
Line of Credit Facility        
Debt Instrument, Basis Spread on Variable Rate 1.125% 1.00%    
Line of credit unused capacity fee percentage (in hundredths) 0.20% 0.20%    
Base Rate [Member]        
Line of Credit Facility        
Line of Credit Facility, Interest Rate Description 0.0350      
London Interbank Offered Rate (LIBOR) [Member]        
Line of Credit Facility        
Line of Credit Facility, Interest Rate Description .0042      
2011 Senior Credit Facility [Member]        
Line of Credit Facility        
Senior credit facility borrowings $ 400,000,000 $ 400,000,000    
Swingline Sub-Facility [Member]        
Line of Credit Facility        
Senior credit facility borrowings 30,000,000 30,000,000    
2016 Senior Credit Facility [Member]        
Line of Credit Facility        
Senior credit facility borrowings 500,000,000 500,000,000    
Borrowing Capacity 50,000,000 50,000,000    
2016 Swingline Sub-Facility [Member]        
Line of Credit Facility        
Senior credit facility borrowings 50,000,000 $ 50,000,000    
Due in years one and two [Member]        
Line of Credit Facility        
Debt Instrument, Periodic Payment, Principal 10,000,000      
Due in years three through five [Member]        
Line of Credit Facility        
Debt Instrument, Periodic Payment, Principal $ 20,000,000