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Long-Term Debt (Details) (USD $)
 6 Months Ended 6 Months Ended 6 Months Ended 6 Months Ended 3 Months Ended 6 Months Ended 3 Months Ended 6 Months Ended
Jun. 27, 2012
Jun. 29, 2011
Apr. 13, 2012
Jun. 27, 2012
Senior secured term loan [Member]
Apr. 12, 2012
Senior secured term loan [Member]
Dec. 28, 2011
Senior secured term loan [Member]
Jun. 27, 2012
Senior secured revolver [Member]
Apr. 12, 2012
Senior secured revolver [Member]
Jun. 27, 2012
Senior secured revolver [Member]
Letters of credit [Member]
Apr. 12, 2012
Senior secured revolver [Member]
Letters of credit [Member]
Jun. 27, 2012
Old Credit Facility [Member]
Jun. 27, 2012
Old Credit Facility [Member]
Write-offs Related to Refinancing [Member]
Jun. 27, 2012
Old Credit Facility [Member]
Write-offs Related to Prepayments [Member]
Jun. 27, 2012
New Credit Facility [Member]
Jun. 27, 2012
New Credit Facility [Member]
Apr. 12, 2012
New Credit Facility [Member]
Line of Credit Facility [Line Items]                                
Aggregate principal amount as per new credit facility         $ 190,000,000     $ 60,000,000   $ 30,000,000           $ 250,000,000
Term for credit facility (in years)                             5 years  
Commitment fee for unused portion of revolving credit facility (in hundredths)             0.50%                  
Reference rate for interest on the credit facility       LIBOR                        
Basis spread on variable rate (in hundredths)       3.00%                        
Accordion feature that allows increase in size of facility                           300,000,000 300,000,000  
Maturity date                             Apr. 12, 2017  
Amount of annual payment on term loan, payable in equal quarterly installments                           19,000,000    
Interest rate cap, description of variable rate basis LIBOR                              
Interest rate cap, basis spread on variable rate (in hundredths)     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                          
Outstanding amount under credit facility       183,000,000     0   26,500,000              
Availability under the revolving facility             33,500,000                  
Weighted-average interest rate under the term loan (in hundredths)       3.25%   5.25%                    
Losses on early extinguishment of debt (8,152,000) (1,984,000)                   7,900,000 200,000      
Debt instrument transaction costs                       1,100,000        
Amortization of deferred financing costs 503,000 662,000                   4,700,000 100,000      
Amortization of original issue discount 137,000 284,000                   2,000,000 100,000      
Repayments of term loan under the credit facility                     8,000,000     7,000,000    
Early repayment of term loan under the credit facility                     7,400,000     2,300,000    
Scheduled repayment of term loan under the credit facility                     600,000     4,800,000    
Aggregate annual maturities of long-term debt, excluding capital lease obligations [Abstract]                                
Remainder of 2012 7,304,000                              
2013 19,000,000                              
2014 19,000,000                              
2015 19,000,000                              
2016 and thereafter 118,750,000                              
Total long-term debt, excluding capital lease obligations $ 183,054,000