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Long-Term Debt (Details) (USD $)
 12 Months Ended 1 Months Ended 12 Months Ended 0 Months Ended 9 Months Ended 12 Months Ended 3 Months Ended 6 Months Ended 9 Months Ended 12 Months Ended
Dec. 26, 2012
Dec. 28, 2011
Dec. 29, 2010
Mar. 28, 2012
Old Credit Facility [Member]
Dec. 26, 2012
Old Credit Facility [Member]
Write-offs Related to Refinancing [Member]
Dec. 26, 2012
Old Credit Facility [Member]
Write-offs Related to Prepayments [Member]
Dec. 26, 2012
Credit Facility Due April 2017 [Member]
Dec. 26, 2012
Credit Facility Due April 2017 [Member]
Dec. 26, 2012
Credit Facility Due April 2017 [Member]
Apr. 12, 2012
Credit Facility Due April 2017 [Member]
Dec. 26, 2012
Senior secured revolver [Member]
Dec. 26, 2012
Senior secured revolver [Member]
Credit Facility Due April 2017 [Member]
Sep. 26, 2012
Senior secured revolver [Member]
Credit Facility Due April 2017 [Member]
Apr. 12, 2012
Senior secured revolver [Member]
Credit Facility Due April 2017 [Member]
Dec. 26, 2012
Letters of credit [Member]
Credit Facility Due April 2017 [Member]
Apr. 12, 2012
Letters of credit [Member]
Credit Facility Due April 2017 [Member]
Dec. 28, 2011
Secured Debt [Member]
Old Credit Facility [Member]
Dec. 26, 2012
Secured Debt [Member]
Credit Facility Due April 2017 [Member]
Dec. 26, 2012
Secured Debt [Member]
Credit Facility Due April 2017 [Member]
Apr. 13, 2012
Secured Debt [Member]
Credit Facility Due April 2017 [Member]
Apr. 12, 2012
Secured Debt [Member]
Credit Facility Due April 2017 [Member]
Line of Credit Facility [Line Items]                                          
Term for credit facility (in years)                 5 years                        
Aggregate principal amount as per new credit facility             $ 300,000,000 $ 300,000,000 $ 300,000,000 $ 250,000,000                      
Line of Credit Facility, Current Borrowing Capacity                           60,000,000   30,000,000         190,000,000
Commitment fee for unused portion of revolving credit facility (in hundredths)                       0.375% 0.50%                
Reference rate for interest on the credit facility                                     LIBOR    
Basis spread on variable rate (in hundredths)                                   2.75% 2.75%   3.00%
Maturity date                 Apr. 12, 2017                        
Amount of annual payment on term loan, payable in equal quarterly installments             4,700,000   19,000,000                        
Interest rate cap, description of variable rate basis                                   LIBOR LIBOR    
Interest rate cap, basis spread on variable rate (percent)                                       2.00%  
Interest rate cap notional amount for the first year                                       150,000,000  
Interest rate cap notional amount for the second year                                       125,000,000  
Losses on early extinguishment of debt 8,290,000 2,589,000 4,755,000   7,900,000 200,000                              
Debt instrument transaction costs         1,200,000                                
Write off of deferred financing costs         4,700,000 100,000                              
Write-off of original issue discount         2,000,000 100,000                              
Outstanding amount under credit facility                     0             170,000,000 170,000,000    
Outstanding amount under letter of credit                             25,200,000            
Availability under the revolving facility                       34,800,000                  
Weighted-average interest rate under the term loan (in hundredths)                                 5.25% 2.97% 2.97%    
Repayments of term loan under the credit facility       8,000,000       20,000,000                          
Early repayment of term loan under the credit facility       7,400,000       5,800,000                          
Scheduled repayment of term loan under the credit facility       $ 600,000       $ 14,300,000