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Income Taxes - Narrative (Details) (USD $)
In Millions, unless otherwise specified
6 Months Ended
Jun. 30, 2014
Jun. 30, 2013
Income Tax Disclosure [Abstract]    
Effective income tax rate 35.00% 114.00%
U.S. Federal statutory rate 35.00% 35.00%
Previously unrecognized tax benefits   $ 2.4
Deferred tax assets 27.6  
Unrecognized deductions for share based compensation awards $ 25 $ 26