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Employee Benefit Plans, Restricted Stock Unit Disclosures (Details) (USD $)
12 Months Ended
Dec. 28, 2013
Dec. 29, 2012
Dec. 31, 2011
Non Employee Directors Restricted Stock Units [Member]
     
Employee Service Share-based Compensation [Line Items]      
Award vesting rights vest ratably on the last day of each fiscal quarter within the year    
Unvested Restricted Stock Units [Roll Forward]      
Granted (in shares) 5,000    
Change of Control Restricted Stock Units [Member]
     
Employee Service Share-based Compensation [Line Items]      
Award vesting rights will only vest and compensation expense will only be recognized upon a change in control as defined in the Company's 2006 equity incentive plan    
Aggregate fair value of RSU's outstanding $ 1,009,000    
Unvested Restricted Stock Units [Roll Forward]      
Granted (in shares) 10,000    
Unvested RSU's at end of year (in shares) 50,000    
Performance-Based Restricted Stock Units [Member]
     
Employee Service Share-based Compensation [Line Items]      
Award vesting rights vest in three equal annual installments, provided that the executive officer is employed by the Company on the applicable vesting dates    
Compensation cost not yet recognized 1,441,000    
Compensation cost not yet recognized, period for recognition 1 year 4 months 24 days    
Time Based Restricted Stock Units [Member]
     
Employee Service Share-based Compensation [Line Items]      
Compensation cost not yet recognized 1,760,000    
Compensation cost not yet recognized, period for recognition 1 year 8 months 12 days    
Stock Option Awards [Member]
     
Employee Service Share-based Compensation [Line Items]      
Award vesting rights stock options vest in three equal annual installments beginning on the first anniversary of the grant date, provided that the recipient remains employed by the Company on the applicable vesting dates    
Compensation cost not yet recognized 1,219,000    
Compensation cost not yet recognized, period for recognition 1 year 9 months 18 days    
Restricted Stock Unit Awards [Member]
     
Unvested Restricted Stock Units [Roll Forward]      
Unvested RSUs at beginning of year (in shares) 363,000 329,000 312,000
Granted (in shares) 176,000 179,000 184,000
Vested (in shares) (182,000) (144,000) (159,000)
Forfeited / expired (in shares) (14,000) (1,000) (8,000)
Unvested RSU's at end of year (in shares) 343,000 363,000 329,000
RSU's Weighted Average Grant Date Fair Value [Roll Forward]      
Weighted average grant date fair value, balance at beginning of year (in dollars per share) $ 20.98 $ 20.02 $ 16.77
Weighted average grant date fair value, granted (in dollars per share) $ 25.53 $ 21.95 $ 24.91
Weighted average grant date fair value, vested (in dollars per share) $ 22.84 $ 19.97 $ 19.90
Weighted average grant date fair value, forfeited / expired (in dollars per share) $ 16.97 $ 27.74 $ 8.81
Weighted average grant date fair value, balance at end of year (in dollars per share) $ 22.50 $ 20.98 $ 20.02
Aggregate fair value of RSU's vested $ 4,997,000 $ 3,321,000 $ 4,071,000