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Income Taxes (Details) (USD $)
In Millions, unless otherwise specified
9 Months Ended
Sep. 30, 2013
Sep. 30, 2012
Oct. 04, 2012
Income Tax Contingency [Line Items]      
Effective Income Tax Rate, Continuing Operations 36.00% 38.00%  
Other Assets     $ 2.9
Accrued interest epense related to unrecognized income tax benefits 0.1    
Gross unrecognized tax benefits 0.4    
Total amount of unrecognized tax benefits, if recognized, would affect the effective tax rate 0.3    
Reduction in Unrecognized Tax Benefits Related to HRE Trust Fund 6.8    
Unrecognized Tax Benefits, Reduction Resulting from Lapse of Applicable Statute of Limitations 0.1    
HRE Trust Fund [Member]
     
Income Tax Contingency [Line Items]      
Significant Change in Unrecognized Tax Benefits is Reasonably Possible, Amount of Unrecorded Benefit $ 0.6