Annual report pursuant to Section 13 and 15(d)

Income Taxes - Components of Deferred Tax Assets (Details)

v2.4.1.9
Income Taxes - Components of Deferred Tax Assets (Details) (USD $)
12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Components of Deferred Tax Assets and Liabilities [Abstract]    
Federal Net Operating Loss Carryforwards $ 637,919,000us-gaap_DeferredTaxAssetsOperatingLossCarryforwardsDomestic $ 608,631,000us-gaap_DeferredTaxAssetsOperatingLossCarryforwardsDomestic
State Net Operating Loss Carryforwards 136,917,000us-gaap_DeferredTaxAssetsOperatingLossCarryforwardsStateAndLocal 111,624,000us-gaap_DeferredTaxAssetsOperatingLossCarryforwardsStateAndLocal
Book deferred gain 77,182,000us-gaap_DeferredTaxAssetsDeferredIncome 77,182,000us-gaap_DeferredTaxAssetsDeferredIncome
Share-based compensation expense 28,432,000us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost 24,089,000us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost
Property, plant and equipment 29,483,000us-gaap_DeferredTaxAssetsPropertyPlantAndEquipment 27,260,000us-gaap_DeferredTaxAssetsPropertyPlantAndEquipment
Other 15,464,000us-gaap_DeferredTaxAssetsOther 3,931,000us-gaap_DeferredTaxAssetsOther
Total deferred tax assets 925,397,000us-gaap_DeferredTaxAssetsGross 852,717,000us-gaap_DeferredTaxAssetsGross
Investment in limited partnership (46,601,000)us-gaap_DeferredTaxLiabilitiesInvestmentInNoncontrolledAffiliates (109,884,000)us-gaap_DeferredTaxLiabilitiesInvestmentInNoncontrolledAffiliates
Other 0us-gaap_DeferredTaxLiabilitiesOther (142,000)us-gaap_DeferredTaxLiabilitiesOther
Total deferred tax liabilities (46,601,000)us-gaap_DeferredIncomeTaxLiabilities (110,026,000)us-gaap_DeferredIncomeTaxLiabilities
Net deferred tax assets 878,796,000us-gaap_DeferredTaxAssetsLiabilitiesNet 742,691,000us-gaap_DeferredTaxAssetsLiabilitiesNet
Less: net deferred tax asset valuation allowance (878,796,000)us-gaap_DeferredTaxAssetsValuationAllowance (742,691,000)us-gaap_DeferredTaxAssetsValuationAllowance
Total net deferred tax asset 0us-gaap_DeferredTaxAssetsNet 0us-gaap_DeferredTaxAssetsNet
Deferred Tax Assets, Operating Loss Carryforwards, Subject to Expiration 3,500,000,000us-gaap_DeferredTaxAssetsOperatingLossCarryforwardsSubjectToExpiration  
Valuation Allowance, Deferred Tax Asset, Increase $ 136,100,000us-gaap_ValuationAllowanceDeferredTaxAssetChangeInAmount