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Employee Benefit Plans (Details Textual) (USD $)
 3 Months Ended 12 Months Ended 24 Months Ended 12 Months Ended 3 Months Ended 6 Months Ended 12 Months Ended 6 Months Ended 12 Months Ended 3 Months Ended 6 Months Ended 12 Months Ended 12 Months Ended 6 Months Ended 12 Months Ended
Jun. 24, 2012
Jun. 26, 2011
Dec. 20, 2009
Dec. 25, 2011
Dec. 26, 2010
Dec. 20, 2009
Dec. 25, 2011
Dec. 25, 2011
Equity Securities [Member]
Dec. 25, 2011
Debt Securities [Member]
Jun. 24, 2012
Defined benefit plan [Member]
Jun. 26, 2011
Defined benefit plan [Member]
Jun. 24, 2012
Defined benefit plan [Member]
Jun. 26, 2011
Defined benefit plan [Member]
Dec. 25, 2011
Defined benefit plan [Member]
Employees
Dec. 26, 2010
Defined benefit plan [Member]
Dec. 20, 2009
Defined benefit plan [Member]
Jun. 24, 2012
Post-Retirement Benefits Plans [Member]
Jun. 26, 2011
Post-Retirement Benefits Plans [Member]
Dec. 25, 2011
Post-Retirement Benefits Plans [Member]
Dec. 26, 2010
Post-Retirement Benefits Plans [Member]
Dec. 20, 2009
Post-Retirement Benefits Plans [Member]
Mar. 24, 2012
Pension Plan Defined Benefit HSI [Member]
Jun. 26, 2011
Pension Plan Defined Benefit HSI [Member]
Jun. 24, 2012
Pension Plan Defined Benefit HSI [Member]
Jun. 26, 2011
Pension Plan Defined Benefit HSI [Member]
Dec. 25, 2011
Pension Plan Defined Benefit HSI [Member]
Dec. 26, 2010
Pension Plan Defined Benefit HSI [Member]
Dec. 20, 2009
Pension Plan Defined Benefit HSI [Member]
Dec. 31, 2005
Pension Plan Defined Benefit HSI [Member]
Employees
Dec. 25, 2010
Pension Plan Defined Benefit HSI [Member]
Dec. 25, 2011
Post Retirement Benefit Plans HSI [Member]
Dec. 26, 2010
Post Retirement Benefit Plans HSI [Member]
Dec. 20, 2009
Post Retirement Benefit Plans HSI [Member]
Dec. 31, 2005
Post Retirement Benefit Plans HSI [Member]
Dec. 25, 2011
Restricted stock units [Member]
Jun. 24, 2012
Restricted stock / vested shares [Member]
Dec. 25, 2011
Restricted stock / vested shares [Member]
Jun. 09, 2010
Restricted stock / vested shares [Member]
Jun. 01, 2010
Restricted stock / vested shares [Member]
Mar. 15, 2010
Restricted stock / vested shares [Member]
Dec. 25, 2011
Health and Benefits Fund [Member]
Dec. 26, 2010
Health and Benefits Fund [Member]
Employee Benefit Plans (Additional Textual) [Abstract]                                                                                    
Historical employer contribution percentage             100.00%                                                                      
Historical percentage of employee contribution for 100% matching contribution by employer             6.00%                                                                      
Employer contribution percentage     50.00%                                                                              
Percentage of Employee contribution for 100% matching contribution by employer     6.00%                                                                              
Plan administered by company       Company also administers a 401(k) plan for certain union employees with no Company match                                                                            
Number of union employees sponsors benefit plan                           30                             50                          
Recorded net periodic benefit costs $ 100,000 $ 100,000               $ 200,000 $ 200,000 $ 400,000 $ 400,000 $ 860,000 $ 879,000 $ 800,000 $ 200,000 $ 200,000 $ 700,000 $ 500,000 $ 800,000 $ 100,000 $ 100,000 $ 200,000 $ 200,000 $ 200,000 $ 200,000 $ 300,000     $ 400,000 $ 400,000 $ 400,000                  
Underfunded pension plan                           900,000 1,300,000       5,200,000 5,100,000           2,800,000       2,500,000                     4,900,000 5,700,000
Minimum age of employee on the date of retirement                                     55 years                       55 years                      
Total year of Service and Age of Employee on the date of Retirement                                     75 years                             75 years                
Minimum year of service to be eligible for post-retirement medical, dental and life insurance                                                                   20 years                
Target investment               65.00% 35.00%                                                                  
Grant date fair value                                                                           $ 99.50 $ 98.00 $ 123.00    
Unrecognized compensation expense                                                                     26,000 200,000 800,000          
Weighted-average period of unrecognized compensation expense                                                                     5 months 1 year 10 months 24 days          
Employee Benefit Plans (Textual) [Abstract]                                                                                    
Total Employee contributions cost       1,000,000 1,100,000 2,100,000                                                                        
Percentage Increase in Assumed Health Care Cost Trend       1.00%                                                                            
Service and interest cost increase       200,000                                                                            
Effect of one percentage point decrease on accumulated postretirement benefit obligation       1,700,000                                                                            
Percentage decrease in the assumed health care cost trend       1.00%                                                                            
Service and interest cost decrease       200,000                                                                            
Decrease in benefit obligation       1,300,000                                                                            
Expected Company contributions, related to the pension plan       $ 800,000     $ 800,000