XML 18 R55.htm IDEA: XBRL DOCUMENT v2.4.1.9
Income Taxes (Details 3) (USD $)
In Millions, unless otherwise specified
 12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Income Taxes      
Increase in valuation allowance $ (15.4)us-gaap_ValuationAllowanceDeferredTaxAssetChangeInAmount $ 16.6us-gaap_ValuationAllowanceDeferredTaxAssetChangeInAmount $ 9.2us-gaap_ValuationAllowanceDeferredTaxAssetChangeInAmount
Internal Revenue Service (IRS) [Member]      
Income taxes      
Net operating loss carryforwards 168.5us-gaap_OperatingLossCarryforwards
/ us-gaap_IncomeTaxAuthorityAxis
= us-gaap_InternalRevenueServiceIRSMember		    
State and Local Jurisdiction [Member]      
Income taxes      
Net operating loss carryforwards $ 168.5us-gaap_OperatingLossCarryforwards
/ us-gaap_IncomeTaxAuthorityAxis
= us-gaap_StateAndLocalJurisdictionMember