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Income Taxes - Narrative (Details) (USD $)
In Millions, unless otherwise specified
9 Months Ended
Sep. 28, 2014
Sep. 29, 2013
Dec. 29, 2013
Mar. 31, 2010
Income Tax Disclosure [Abstract]        
Federal annual utilization of NOL carryforwards limit, next five years       $ 27
Threshold period for change in allowed annual amount of NOL to be recognized 5 years      
Federal annual utilization of NOL carryforwards limit, after year five 11.6      
Unrecognized tax benefits that if recognized would affect effective tax rate     15.8  
Unrecognized tax benefits increase (decrease) related to the CEI acquisition (0.2)      
Income tax penalties and interest expense 0.1 0.1    
Benefit for income tax penalties and interest related to reversal of prior positions   $ 0.2