Income Taxes, Net Operating Losses (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2011 Federal [Member]	Dec. 31, 2012 New Markets Tax Credit [Member]
Operating Loss Carryforwards [Line Items]
Tax Credit Carryforward, Expiration Date		Jan. 01, 2029
Net Operating Losses [Abstract]
Net operating loss carryforwards	$ 477.7
Bonus Depreciation	$ 411.0