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Income Taxes (Details) (USD $)
In Millions, unless otherwise specified
3 Months Ended 9 Months Ended
Sep. 30, 2013
Sep. 30, 2013
Income Taxes    
Federal statutory tax rate (as a percent) 37.00% 37.00%
Income tax adjustment, net of federal tax benefit $ 0.6 $ 13.0
State income tax carryforwards $ 12.6 $ 12.6