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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 0 Months Ended 6 Months Ended 0 Months Ended 6 Months Ended
Jun. 29, 2014
Jun. 30, 2013
Jun. 29, 2014
Jun. 30, 2013
Jun. 29, 2014
Stock Options [Member]
Jun. 30, 2013
Stock Options [Member]
Jun. 29, 2014
Restricted Stock Units (RSUs) [Member]
Jun. 30, 2013
Restricted Stock Units (RSUs) [Member]
Dec. 29, 2013
Restricted Stock Units (RSUs) [Member]
Jun. 29, 2014
Time-Vested Cash Unit Awards [Member]
Jun. 30, 2013
Time-Vested Cash Unit Awards [Member]
Jun. 29, 2014
Time-Vested Cash Unit Awards [Member]
Jun. 30, 2013
Time-Vested Cash Unit Awards [Member]
Jun. 29, 2014
Monte Carlo Simulation Cash-Based Award May 2, 2013 [Member]
Feb. 27, 2014
Long Term Incentive Plan, 2014 Plan [Member]
Restricted Stock Units (RSUs) [Member]
Jun. 29, 2014
Long Term Incentive Plan, 2014 Plan [Member]
Restricted Stock Units (RSUs) [Member]
May 28, 2013
LTIP 2013 Plan [Member]
Feb. 27, 2013
LTIP 2013 Plan [Member]
Jun. 29, 2014
LTIP 2013 Plan [Member]
Jun. 30, 2013
LTIP 2013 Plan [Member]
May 02, 2013
May 2, 2013 Cash-Based Award [Member]
Jun. 29, 2014
May 2, 2013 Cash-Based Award [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                                            
Share-based compensation expense $ 1,400,000 $ 1,800,000 $ 2,900,000 $ 3,800,000                       $ 100,000     $ 47,000 $ 16,000    
Share-based compensation expense net of tax 1,400,000 1,800,000 2,800,000 3,800,000                                    
Tax benefit from option exercise     100,000 200,000                                    
Weighted-average grant date fair value (in US$ per share)             $ 14.39               $ 14.90   $ 11.56 $ 11.91        
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized             956,356.000   852,508                          
Unrecognized compensation cost         1,700,000   5,100,000                 1,000,000     100,000      
Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Maximum Units Outstanding Achievable                               153,820     26,400      
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                                           $ 0.51
Allocated Cash-based Compensation Expense                                           29,000
Cash-based Compensation Arrangement by Cash-based Payment Award, Fair Value Assumptions, Expected Volatility Rate                           42.98%                
Cash-based Compensation Arrangement by Cash-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate                           0.28%                
Cash-based Compensation Arrangement by Cash-based Payment Award, Fair Value Assumptions, Expected Dividend Rate                           0.00%                
Total intrinsic value of options exercised         100,000 200,000                                
Total fair value of restricted stock awards             2,900,000 1,800,000                            
Weighted-average period over which unrecognized compensation cost will be recognized (years)         1 year 10 months 29 days   2 years 0 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 $ 600,000