Employee Benefits (Plan Assets) (Details) (Pension Benefits [Member], USD $)
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12 Months Ended | |||||||||||
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Dec. 31, 2011
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Dec. 25, 2010
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Dec. 26, 2009
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Target Allocations | ||||||||||||
Target Allocation, Equity securities | 67.00% | |||||||||||
Target Allocation, Fixed income | 31.00% | |||||||||||
Target Allocation, Other | 2.00% | |||||||||||
Target Allocation, Total | 100.00% | |||||||||||
Actual Allocations | ||||||||||||
Defined Benefit Plan, Equity Securities | 59.00% | 65.00% | ||||||||||
Defined Benefit Plan, Debt Securities | 37.00% | 31.00% | ||||||||||
Defined Benefit Plan, Other Plan Assets | 4.00% | 4.00% | ||||||||||
Defined Benefit Plan, Actual Plan Asset Allocations | 100.00% | 100.00% | ||||||||||
Fair value of plan assets | $ 202,652,000 | $ 192,429,000 | $ 174,022,000 | |||||||||
Cash [Member]
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Actual Allocations | ||||||||||||
Fair value of plan assets | 1,132,000 | |||||||||||
Common Stock [Member]
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Actual Allocations | ||||||||||||
Fair value of plan assets | 85,288,000 | [1] | ||||||||||
Debt Securities [Member]
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Actual Allocations | ||||||||||||
Fair value of plan assets | 54,067,000 | [1] | ||||||||||
Mutual Funds [Member]
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Actual Allocations | ||||||||||||
Fair value of plan assets | 60,377,000 | [2] | ||||||||||
Life Insurance Policies [Member]
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Actual Allocations | ||||||||||||
Fair value of plan assets | 1,703,000 | [3] | ||||||||||
Other Plan Asset Categories [Member]
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Actual Allocations | ||||||||||||
Fair value of plan assets | 85,000 | [4] | ||||||||||
Quoted Prices in Active Markets for Identical Assets Level 1 [Member]
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Actual Allocations | ||||||||||||
Fair value of plan assets | 186,390,000 | |||||||||||
Quoted Prices in Active Markets for Identical Assets Level 1 [Member] | Cash [Member]
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Actual Allocations | ||||||||||||
Fair value of plan assets | 1,132,000 | |||||||||||
Quoted Prices in Active Markets for Identical Assets Level 1 [Member] | Common Stock [Member]
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Actual Allocations | ||||||||||||
Fair value of plan assets | 85,288,000 | [1] | ||||||||||
Quoted Prices in Active Markets for Identical Assets Level 1 [Member] | Debt Securities [Member]
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Actual Allocations | ||||||||||||
Fair value of plan assets | 54,067,000 | [1] | ||||||||||
Quoted Prices in Active Markets for Identical Assets Level 1 [Member] | Mutual Funds [Member]
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Actual Allocations | ||||||||||||
Fair value of plan assets | 45,818,000 | [2] | ||||||||||
Quoted Prices in Active Markets for Identical Assets Level 1 [Member] | Life Insurance Policies [Member]
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Actual Allocations | ||||||||||||
Fair value of plan assets | 0 | [2] | ||||||||||
Quoted Prices in Active Markets for Identical Assets Level 1 [Member] | Other Plan Asset Categories [Member]
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Actual Allocations | ||||||||||||
Fair value of plan assets | 85,000 | [4] | ||||||||||
Significant Other Observable Inputs Level 2 [Member]
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Actual Allocations | ||||||||||||
Fair value of plan assets | 14,843,000 | |||||||||||
Significant Other Observable Inputs Level 2 [Member] | Cash [Member]
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Actual Allocations | ||||||||||||
Fair value of plan assets | 0 | |||||||||||
Significant Other Observable Inputs Level 2 [Member] | Common Stock [Member]
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Actual Allocations | ||||||||||||
Fair value of plan assets | 0 | [1] | ||||||||||
Significant Other Observable Inputs Level 2 [Member] | Debt Securities [Member]
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Actual Allocations | ||||||||||||
Fair value of plan assets | 0 | [1] | ||||||||||
Significant Other Observable Inputs Level 2 [Member] | Mutual Funds [Member]
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Actual Allocations | ||||||||||||
Fair value of plan assets | 14,559,000 | [2] | ||||||||||
Significant Other Observable Inputs Level 2 [Member] | Life Insurance Policies [Member]
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Actual Allocations | ||||||||||||
Fair value of plan assets | 284,000 | [3] | ||||||||||
Significant Other Observable Inputs Level 2 [Member] | Other Plan Asset Categories [Member]
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Actual Allocations | ||||||||||||
Fair value of plan assets | 0 | [4] | ||||||||||
Significant Unobservable Inputs Level 3 [Member]
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Actual Allocations | ||||||||||||
Fair value of plan assets | 1,419,000 | 1,203,000 | ||||||||||
Significant Unobservable Inputs Level 3 [Member] | Cash [Member]
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Actual Allocations | ||||||||||||
Fair value of plan assets | 0 | |||||||||||
Significant Unobservable Inputs Level 3 [Member] | Common Stock [Member]
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Actual Allocations | ||||||||||||
Fair value of plan assets | 0 | [1] | ||||||||||
Significant Unobservable Inputs Level 3 [Member] | Debt Securities [Member]
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Actual Allocations | ||||||||||||
Fair value of plan assets | 0 | [1] | ||||||||||
Significant Unobservable Inputs Level 3 [Member] | Mutual Funds [Member]
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Actual Allocations | ||||||||||||
Fair value of plan assets | 0 | [2] | ||||||||||
Significant Unobservable Inputs Level 3 [Member] | Life Insurance Policies [Member]
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Actual Allocations | ||||||||||||
Fair value of plan assets | 1,419,000 | [3] | ||||||||||
Significant Unobservable Inputs Level 3 [Member] | Other Plan Asset Categories [Member]
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Actual Allocations | ||||||||||||
Fair value of plan assets | $ 0 | [4] | ||||||||||
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