Operating (Gains), Losses and Other Charges, Net (Details) (USD $)
 12 Months Ended
Dec. 25, 2013
Dec. 26, 2012
Dec. 28, 2011
Operating (gains), losses and other charges, net [Abstract]      
Gains on sales of assets and other, net $ (66,000) $ (7,090,000) $ (3,187,000)
Restructuring charges and exit costs 1,389,000 3,912,000 1,234,000
Impairment charges 5,748,000 3,660,000 4,055,000
Operating (gains), losses and other charges, net 7,071,000 482,000 2,102,000
Restructuring charges and exit costs [Abstract]      
Exit costs 630,000 [1] 1,926,000 [1] 848,000
Severance and other restructuring charges 759,000 1,986,000 386,000
Total restructuring charges and exit costs 1,389,000 3,912,000 1,234,000
Components of change in accrued exit cost liabilities [Roll Forward]      
Balance, beginning of year 4,061,000 3,863,000  
Exit costs 630,000 [1] 1,926,000 [1] 848,000
Payments, net of sublease receipts (1,726,000) (2,227,000)  
Reclassification of certain lease liabilities, net (69,000) 171,000  
Interest accretion 253,000 328,000  
Balance, end of year 3,149,000 4,061,000 3,863,000
Less current portion included in other current liabilities 1,260,000 1,361,000  
Long-term portion included in other noncurrent liabilities 1,889,000 2,700,000  
Estimated net cash payments related to exit cost liabilities [Abstract]      
2014 1,395,000    
2015 542,000    
2016 308,000    
2017 296,000    
2018 299,000    
Thereafter 1,015,000    
Total 3,855,000    
Less imputed interest 706,000    
Present value of exit cost liabilities 3,149,000    
Existing sublease arrangements 2,400,000    
Properties expected to enter into sublease arrangements in the future 1,400,000    
Accrued severance and other restructuring charges 100,000 500,000  
Impairment charges $ 5,748,000 $ 3,660,000 $ 4,055,000
[1] Included as a component of operating (gains), losses and other charges, net.