Income Taxes (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2014
Minimum [Member]
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards, expiration date	Dec. 31, 2015
Maximum [Member]
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards, expiration date	Dec. 31, 2034
Federal [Member]
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards	227.5
Operating loss carryforwards, unrestricted	165.2
State [Member]
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards	157.5
Operating loss carryforwards, unrestricted	157.5