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Restatement of Previously Issued Financial Statements - Condensed Consolidated Statements of Cash Flows (Details) (USD $) In Thousands, unless otherwise specified | 3 Months Ended
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Mar. 31, 2014 | Mar. 31, 2013
Net loss | $ (142,406)us-gaap_ProfitLoss | [1] | $ (539,215)us-gaap_ProfitLoss | [1]
Changes in operating assets and liabilities | (81,147)us-gaap_IncreaseDecreaseInOperatingCapital |  | (48,965)us-gaap_IncreaseDecreaseInOperatingCapital |
As Reported |  |  |  |
Net loss | (134,085)us-gaap_ProfitLoss / us-gaap_StatementScenarioAxis = us-gaap_ScenarioPreviouslyReportedMember |  | (531,259)us-gaap_ProfitLoss / us-gaap_StatementScenarioAxis = us-gaap_ScenarioPreviouslyReportedMember |
Changes in operating assets and liabilities | $ (89,468)us-gaap_IncreaseDecreaseInOperatingCapital / us-gaap_StatementScenarioAxis = us-gaap_ScenarioPreviouslyReportedMember |  | $ (56,921)us-gaap_IncreaseDecreaseInOperatingCapital / us-gaap_StatementScenarioAxis = us-gaap_ScenarioPreviouslyReportedMember |
[1] | Guarantor and Consolidated direct operating expenses have been restated to reflect accrual of the CO2 delivery shortfall penalty. See Note 2.

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