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Income Taxes (Details) (USD $)
In Millions, unless otherwise specified
3 Months Ended
Mar. 31, 2014
Mar. 31, 2013
Income Taxes [Abstract]    
Effective tax rate (in hundredths) 9.00% 12.40%
Unrecognized tax benefits $ 0.2  
Accrued interest relating to unrecognized tax benefits, maximum $ 0.1