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Employee Benefit Plans (Details) (USD $)
In Millions, unless otherwise specified
12 Months Ended 1 Months Ended 12 Months Ended
Dec. 29, 2012
Dec. 31, 2011
Jan. 01, 2011
Jan. 01, 2011
2010 Cash Incentive Compensation Plan
Jan. 01, 2011
2010 Cash Incentive Compensation Plan
All management
Jan. 01, 2011
2010 Cash Incentive Compensation Plan
Executive management
Feb. 29, 2012
2011 Cash Incentive Plan
Dec. 29, 2012
Deferred salary
Dec. 29, 2012
Deferred bonus
Compensation Related Costs [Abstract]                  
Employer matching contribution to a 401(k) plan $ 0.8 $ 0.8 $ 0.2            
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items]                  
Percentage of compensation that may be deferred               75.00% 100.00%
Amount of deferred compensation paid out 0.3 0.3 0.3            
Deferred compensation liability 0.1 0.4              
Cash incentive compensation, maximum payout       6.5 3.0 1.7      
Charge related to incentive compensation       $ 5.4     $ 2.6