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Employee Benefit Plans (Fair Values of Pension Plan Assets) (Details) (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Dec. 25, 2013
Equity Securities [Member]
Dec. 25, 2013
Fixed Income Securities [Member]
Dec. 25, 2013
Pension Plan [Member]
Dec. 26, 2012
Pension Plan [Member]
Dec. 28, 2011
Pension Plan [Member]
Dec. 25, 2013
Pension Plan [Member]
Quoted Prices in Active Markets for Identical Assets/Liabilities (Level 1) [Member]
Dec. 26, 2012
Pension Plan [Member]
Quoted Prices in Active Markets for Identical Assets/Liabilities (Level 1) [Member]
Dec. 25, 2013
Pension Plan [Member]
Significant Other Observable Inputs (Level 2) [Member]
Dec. 26, 2012
Pension Plan [Member]
Significant Other Observable Inputs (Level 2) [Member]
Dec. 25, 2013
Pension Plan [Member]
Significant Unobservable Inputs (Level 3) [Member]
Dec. 26, 2012
Pension Plan [Member]
Significant Unobservable Inputs (Level 3) [Member]
Dec. 25, 2013
Pension Plan [Member]
Cash Equivalents [Member]
Dec. 26, 2012
Pension Plan [Member]
Cash Equivalents [Member]
Dec. 25, 2013
Pension Plan [Member]
Cash Equivalents [Member]
Quoted Prices in Active Markets for Identical Assets/Liabilities (Level 1) [Member]
Dec. 26, 2012
Pension Plan [Member]
Cash Equivalents [Member]
Quoted Prices in Active Markets for Identical Assets/Liabilities (Level 1) [Member]
Dec. 25, 2013
Pension Plan [Member]
Cash Equivalents [Member]
Significant Other Observable Inputs (Level 2) [Member]
Dec. 26, 2012
Pension Plan [Member]
Cash Equivalents [Member]
Significant Other Observable Inputs (Level 2) [Member]
Dec. 25, 2013
Pension Plan [Member]
Cash Equivalents [Member]
Significant Unobservable Inputs (Level 3) [Member]
Dec. 26, 2012
Pension Plan [Member]
Cash Equivalents [Member]
Significant Unobservable Inputs (Level 3) [Member]
Dec. 25, 2013
Pension Plan [Member]
U.S. Large-Cap [Member]
Dec. 26, 2012
Pension Plan [Member]
U.S. Large-Cap [Member]
Dec. 25, 2013
Pension Plan [Member]
U.S. Large-Cap [Member]
Quoted Prices in Active Markets for Identical Assets/Liabilities (Level 1) [Member]
Dec. 26, 2012
Pension Plan [Member]
U.S. Large-Cap [Member]
Quoted Prices in Active Markets for Identical Assets/Liabilities (Level 1) [Member]
Dec. 25, 2013
Pension Plan [Member]
U.S. Large-Cap [Member]
Significant Other Observable Inputs (Level 2) [Member]
Dec. 26, 2012
Pension Plan [Member]
U.S. Large-Cap [Member]
Significant Other Observable Inputs (Level 2) [Member]
Dec. 25, 2013
Pension Plan [Member]
U.S. Large-Cap [Member]
Significant Unobservable Inputs (Level 3) [Member]
Dec. 26, 2012
Pension Plan [Member]
U.S. Large-Cap [Member]
Significant Unobservable Inputs (Level 3) [Member]
Dec. 25, 2013
Pension Plan [Member]
U.S. Mid-Cap [Member]
Dec. 26, 2012
Pension Plan [Member]
U.S. Mid-Cap [Member]
Dec. 25, 2013
Pension Plan [Member]
U.S. Mid-Cap [Member]
Quoted Prices in Active Markets for Identical Assets/Liabilities (Level 1) [Member]
Dec. 26, 2012
Pension Plan [Member]
U.S. Mid-Cap [Member]
Quoted Prices in Active Markets for Identical Assets/Liabilities (Level 1) [Member]
Dec. 25, 2013
Pension Plan [Member]
U.S. Mid-Cap [Member]
Significant Other Observable Inputs (Level 2) [Member]
Dec. 26, 2012
Pension Plan [Member]
U.S. Mid-Cap [Member]
Significant Other Observable Inputs (Level 2) [Member]
Dec. 25, 2013
Pension Plan [Member]
U.S. Mid-Cap [Member]
Significant Unobservable Inputs (Level 3) [Member]
Dec. 26, 2012
Pension Plan [Member]
U.S. Mid-Cap [Member]
Significant Unobservable Inputs (Level 3) [Member]
Dec. 25, 2013
Pension Plan [Member]
U.S. Small-Cap [Member]
Dec. 26, 2012
Pension Plan [Member]
U.S. Small-Cap [Member]
Dec. 25, 2013
Pension Plan [Member]
U.S. Small-Cap [Member]
Quoted Prices in Active Markets for Identical Assets/Liabilities (Level 1) [Member]
Dec. 26, 2012
Pension Plan [Member]
U.S. Small-Cap [Member]
Quoted Prices in Active Markets for Identical Assets/Liabilities (Level 1) [Member]
Dec. 25, 2013
Pension Plan [Member]
U.S. Small-Cap [Member]
Significant Other Observable Inputs (Level 2) [Member]
Dec. 26, 2012
Pension Plan [Member]
U.S. Small-Cap [Member]
Significant Other Observable Inputs (Level 2) [Member]
Dec. 25, 2013
Pension Plan [Member]
U.S. Small-Cap [Member]
Significant Unobservable Inputs (Level 3) [Member]
Dec. 26, 2012
Pension Plan [Member]
U.S. Small-Cap [Member]
Significant Unobservable Inputs (Level 3) [Member]
Dec. 25, 2013
Pension Plan [Member]
International Large-Cap [Member]
Dec. 26, 2012
Pension Plan [Member]
International Large-Cap [Member]
Dec. 25, 2013
Pension Plan [Member]
International Large-Cap [Member]
Quoted Prices in Active Markets for Identical Assets/Liabilities (Level 1) [Member]
Dec. 26, 2012
Pension Plan [Member]
International Large-Cap [Member]
Quoted Prices in Active Markets for Identical Assets/Liabilities (Level 1) [Member]
Dec. 25, 2013
Pension Plan [Member]
International Large-Cap [Member]
Significant Other Observable Inputs (Level 2) [Member]
Dec. 26, 2012
Pension Plan [Member]
International Large-Cap [Member]
Significant Other Observable Inputs (Level 2) [Member]
Dec. 25, 2013
Pension Plan [Member]
International Large-Cap [Member]
Significant Unobservable Inputs (Level 3) [Member]
Dec. 26, 2012
Pension Plan [Member]
International Large-Cap [Member]
Significant Unobservable Inputs (Level 3) [Member]
Dec. 25, 2013
Pension Plan [Member]
U.S. Treasuries [Member]
Dec. 26, 2012
Pension Plan [Member]
U.S. Treasuries [Member]
Dec. 25, 2013
Pension Plan [Member]
U.S. Treasuries [Member]
Quoted Prices in Active Markets for Identical Assets/Liabilities (Level 1) [Member]
Dec. 26, 2012
Pension Plan [Member]
U.S. Treasuries [Member]
Quoted Prices in Active Markets for Identical Assets/Liabilities (Level 1) [Member]
Dec. 25, 2013
Pension Plan [Member]
U.S. Treasuries [Member]
Significant Other Observable Inputs (Level 2) [Member]
Dec. 26, 2012
Pension Plan [Member]
U.S. Treasuries [Member]
Significant Other Observable Inputs (Level 2) [Member]
Dec. 25, 2013
Pension Plan [Member]
U.S. Treasuries [Member]
Significant Unobservable Inputs (Level 3) [Member]
Dec. 26, 2012
Pension Plan [Member]
U.S. Treasuries [Member]
Significant Unobservable Inputs (Level 3) [Member]
Dec. 25, 2013
Pension Plan [Member]
Corporate Bonds [Member]
Dec. 26, 2012
Pension Plan [Member]
Corporate Bonds [Member]
Dec. 25, 2013
Pension Plan [Member]
Corporate Bonds [Member]
Quoted Prices in Active Markets for Identical Assets/Liabilities (Level 1) [Member]
Dec. 26, 2012
Pension Plan [Member]
Corporate Bonds [Member]
Quoted Prices in Active Markets for Identical Assets/Liabilities (Level 1) [Member]
Dec. 25, 2013
Pension Plan [Member]
Corporate Bonds [Member]
Significant Other Observable Inputs (Level 2) [Member]
Dec. 26, 2012
Pension Plan [Member]
Corporate Bonds [Member]
Significant Other Observable Inputs (Level 2) [Member]
Dec. 25, 2013
Pension Plan [Member]
Corporate Bonds [Member]
Significant Unobservable Inputs (Level 3) [Member]
Dec. 26, 2012
Pension Plan [Member]
Corporate Bonds [Member]
Significant Unobservable Inputs (Level 3) [Member]
Dec. 25, 2013
Pension Plan [Member]
Commingled Funds [Member]
Dec. 26, 2012
Pension Plan [Member]
Commingled Funds [Member]
Dec. 25, 2013
Pension Plan [Member]
Commingled Funds [Member]
Quoted Prices in Active Markets for Identical Assets/Liabilities (Level 1) [Member]
Dec. 26, 2012
Pension Plan [Member]
Commingled Funds [Member]
Quoted Prices in Active Markets for Identical Assets/Liabilities (Level 1) [Member]
Dec. 25, 2013
Pension Plan [Member]
Commingled Funds [Member]
Significant Other Observable Inputs (Level 2) [Member]
Dec. 26, 2012
Pension Plan [Member]
Commingled Funds [Member]
Significant Other Observable Inputs (Level 2) [Member]
Dec. 25, 2013
Pension Plan [Member]
Commingled Funds [Member]
Significant Unobservable Inputs (Level 3) [Member]
Dec. 26, 2012
Pension Plan [Member]
Commingled Funds [Member]
Significant Unobservable Inputs (Level 3) [Member]
Defined Benefit Plan Disclosure [Line Items]                                                                                                                                                      
Strategic target asset allocation 35.00% 65.00%                                                                                                                                                  
Fair value of plan assets     $ 61,094 $ 58,006 $ 53,270 $ 58,502 $ 54,354 $ 2,592 $ 3,652 $ 0 $ 0 $ 1,785 $ 873 $ 1,785 $ 873 $ 0 $ 0 $ 0 $ 0 $ 9,880 [1] $ 15,569 [1] $ 9,880 [1] $ 15,569 [1] $ 0 [1] $ 0 [1] $ 0 [1] $ 0 [1] $ 2,467 [2] $ 4,702 [2] $ 2,467 [2] $ 4,702 [2] $ 0 [2] $ 0 [2] $ 0 [2] $ 0 [2] $ 615 [3] $ 1,157 [3] $ 615 [3] $ 1,157 [3] $ 0 [3] $ 0 [3] $ 0 [3] $ 0 [3] $ 6,200 $ 9,292 $ 6,200 $ 9,292 $ 0 $ 0 $ 0 $ 0 $ 4,245 $ 2,582 $ 4,245 $ 2,582 $ 0 $ 0 $ 0 $ 0 $ 33,310 [4] $ 20,179 [4] $ 33,310 [4] $ 20,179 [4] $ 0 [4] $ 0 [4] $ 0 [4] $ 0 [4] $ 2,592 [5] $ 3,652 [5] $ 0 [5] $ 0 [5] $ 2,592 [5] $ 3,652 [5] $ 0 [5] $ 0 [5]
[1] The majority of this category represents a fund with the objective of approximating the return of the S&P 500 Index. The remaining securities include both a large-value fund and a large-growth fund investing in diverse industries.
[2] This category includes both a mid-growth fund with the objective of outperforming the Russell Mid Cap Growth Index and a mid-value fund investing in diverse industries.
[3] This category includes both a small-value fund and a small-growth fund investing in diverse industries.
[4] This category includes intermediate and long-term investment grade bonds from diverse industries.
[5] This category represents a fund of well diversified mutual funds with the objective of providing a low-volatility means to access equity-like returns.