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Employee Benefit Plans (Components Of The Change In Unamortized Actuarial Losses, Net, Included In Accumulated Other Comprehensive Income) (Details) (USD $)
 12 Months Ended
Dec. 25, 2013
Dec. 26, 2012
Dec. 28, 2011
Components of the Change in Accumulated Other Comprehensive Income (Loss) [Roll Forward]      
Net gain $ 876,000 $ 2,610,000 $ (2,841,000)
Minimum pension liability adjustment (6,309,000) 186,000 5,614,000
Accumulated other comprehensive income (losses) related to minimum pension liability adjustments, net of tax 18,700,000 25,000,000  
Accumulated other comprehensive income (losses) related to minimum pension liability adjustments, tax amount (400,000) 3,800,000  
Pension Plan [Member]
      
Components of the Change in Accumulated Other Comprehensive Income (Loss) [Roll Forward]      
Balance, beginning of year (27,798,000) (27,596,000)  
Benefit obligation actuarial gain (loss) 7,836,000 (4,575,000)  
Net gain 876,000 2,610,000  
Amortization of net loss 1,653,000 1,763,000 1,004,000
Balance, end of year (17,433,000) (27,798,000) (27,596,000)
Other Defined Benefit Plans [Member]
      
Components of the Change in Accumulated Other Comprehensive Income (Loss) [Roll Forward]      
Balance, beginning of year (1,007,000) (832,000)  
Benefit obligation actuarial gain (loss) 37,000 (227,000)  
Amortization of net loss 71,000 52,000 32,000
Balance, end of year $ (899,000) $ (1,007,000) $ (832,000)