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Stock-Based Compensation (Narrative) (Details) (USD $)
3 Months Ended 6 Months Ended 3 Months Ended 6 Months Ended 0 Months Ended 6 Months Ended 12 Months Ended 0 Months Ended 6 Months Ended 0 Months Ended 3 Months Ended 6 Months Ended
Jun. 30, 2013
Jun. 24, 2012
Jun. 30, 2013
Jun. 24, 2012
Jun. 30, 2013
Stock Options [Member]
Jun. 24, 2012
Stock Options [Member]
Jun. 30, 2013
Restricted Stock Units (RSUs) [Member]
Jun. 24, 2012
Restricted Stock Units (RSUs) [Member]
Jun. 30, 2013
Time-Vested Cash Unit Awards [Member]
Jun. 24, 2012
Time-Vested Cash Unit Awards [Member]
Jun. 30, 2013
Time-Vested Cash Unit Awards [Member]
Jun. 24, 2012
Time-Vested Cash Unit Awards [Member]
Feb. 27, 2013
Monte Carlo Simulation RSU February 27, 2013 [Member]
May 28, 2013
Monte Carlo Simulation RSU May 28, 2013 [Member]
May 02, 2013
Monte Carlo Simulation Cash-Based Award May 2, 2013 [Member]
Jul. 24, 2012
LTIP Second Half 2012 Plan [Member]
Jun. 30, 2013
LTIP Second Half 2012 Plan [Member]
Dec. 30, 2012
LTIP Second Half 2012 Plan [Member]
Apr. 30, 2013
LTIP Second Half 2012 Plan [Member]
May 28, 2013
LTIP 2013 Plan [Member]
Feb. 27, 2013
LTIP 2013 Plan [Member]
Jun. 30, 2013
LTIP 2013 Plan [Member]
May 02, 2013
May 2, 2013 Cash-Based Award [Member]
Jun. 30, 2013
May 2, 2013 Cash-Based Award [Member]
Jun. 30, 2013
May 2, 2013 Cash-Based Award [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                                                  
Share-based compensation expense $ 1,800,000 $ 900,000 $ 3,800,000 $ 2,700,000                           $ 600,000       $ 16,000      
Allocated Share Based Compensation Expense Reversal                                 100,000                
Awards vested                                     74,321            
Grant date price of vested shares                                     7.59            
Share-based compensation expense net of tax 1,800,000 900,000 3,800,000 2,600,000                                          
Tax benefit from option exercise     200,000 700,000                                          
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value             $ 11.38                 $ 7.59       $ 11.56 $ 11.91        
Total intrinsic value of options exercised         200,000 100,000                                      
Total fair value of restricted stock awards             1,800,000 2,000,000                                  
Unrecognized compensation cost         1,300,000   4,400,000                             200,000      
Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Maximum Units Outstanding Achievable                                           26,400      
Weighted-average period over which unrecognized compensation cost will be recognized (years)         2 years   1 year 6 months 0 days                                    
Deferred compensation arrangement liability, current and noncurrent                 400,000 400,000 400,000 400,000                          
Deferred compensation arrangement with individual, share-based compensation expense                 300,000 300,000 600,000 500,000                          
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate     50.79% 51.92%                 47.01% 45.23%                      
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate     0.835% 0.872%                 0.35% 0.41%                      
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Dividend Rate     0.00% 0.00%                 0.00% 0.00%                      
Cash-based Compensation Arrangement by Cash-based Payment Award, Established Target Cash Amount                                             400,000    
Cash-based Compensation Arrangement by Cash-based Payment Award, Fair Value                                                 0.0071
Allocated Cash-based Compensation Expense                                               $ 18,000  
Cash-based Compensation Arrangement by Cash-based Payment Award, Fair Value Assumptions, Expected Volatility Rate                             45.20%                    
Cash-based Compensation Arrangement by Cash-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate                             0.51%                    
Cash-based Compensation Arrangement by Cash-based Payment Award, Fair Value Assumptions, Expected Dividend Rate                             0.00%