Summary of Signicant Accounting Policies (Income Tax) (Details) (USD $)
In Millions, unless otherwise specified
12 Months Ended 12 Months Ended
Dec. 31, 2010
Dec. 31, 2013
Dec. 31, 2013
Minimum [Member]
Federal [Member]
Dec. 31, 2013
Maximum [Member]
Federal [Member]
Income Tax Examination [Line Items]        
Income Tax Examination, Year under Examination     2006 2013
Income Taxes [Abstract]        
Income Tax Amendment, Tax Receivable Increase $ 15.4      
Net tax payable   $ 0.6