Acquisitions and Divestitures - Business Acquisition Pro Forma Information Incremental Items (Details) (USD $) In Thousands, unless otherwise specified
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3 Months Ended |
Mar. 31, 2015
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Mar. 31, 2014
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Business Acquisition [Line Items] |
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Revenues |
$ 127,907us-gaap_Revenues
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$ 254,516us-gaap_Revenues
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DD&A |
125,467us-gaap_DepreciationAmortizationAndAccretionNet
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123,306us-gaap_DepreciationAmortizationAndAccretionNet
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G&A |
20,766us-gaap_GeneralAndAdministrativeExpense
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23,588us-gaap_GeneralAndAdministrativeExpense
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Interest expense |
22,944us-gaap_InterestCostsIncurred
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21,460us-gaap_InterestCostsIncurred
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Capitalized |
(1,783)us-gaap_InterestCostsCapitalizedAdjustment
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(2,072)us-gaap_InterestCostsCapitalizedAdjustment
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Income tax expense |
(103,574)us-gaap_IncomeTaxExpenseBenefit
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6,648us-gaap_IncomeTaxExpenseBenefit
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Woodside Properties |
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Business Acquisition [Line Items] |
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Revenues |
5,500us-gaap_Revenues / us-gaap_BusinessAcquisitionAxis = wti_WoodsidePropertiesMember
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Direct operating expenses |
3,200us-gaap_OperatingCostsAndExpenses / us-gaap_BusinessAcquisitionAxis = wti_WoodsidePropertiesMember
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DD&A |
4,100us-gaap_DepreciationAmortizationAndAccretionNet / us-gaap_BusinessAcquisitionAxis = wti_WoodsidePropertiesMember
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Income tax expense |
600us-gaap_IncomeTaxExpenseBenefit / us-gaap_BusinessAcquisitionAxis = wti_WoodsidePropertiesMember
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Woodside Properties | Pro Forma |
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Business Acquisition [Line Items] |
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Revenues |
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13,859us-gaap_Revenues / us-gaap_BusinessAcquisitionAxis = wti_WoodsidePropertiesMember / us-gaap_StatementScenarioAxis = us-gaap_ProFormaMember
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[1] |
Direct operating expenses |
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2,612us-gaap_OperatingCostsAndExpenses / us-gaap_BusinessAcquisitionAxis = wti_WoodsidePropertiesMember / us-gaap_StatementScenarioAxis = us-gaap_ProFormaMember
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[1] |
DD&A |
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4,989us-gaap_DepreciationAmortizationAndAccretionNet / us-gaap_BusinessAcquisitionAxis = wti_WoodsidePropertiesMember / us-gaap_StatementScenarioAxis = us-gaap_ProFormaMember
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[2] |
G&A |
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200us-gaap_GeneralAndAdministrativeExpense / us-gaap_BusinessAcquisitionAxis = wti_WoodsidePropertiesMember / us-gaap_StatementScenarioAxis = us-gaap_ProFormaMember
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[3] |
Interest expense |
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246us-gaap_InterestCostsIncurred / us-gaap_BusinessAcquisitionAxis = wti_WoodsidePropertiesMember / us-gaap_StatementScenarioAxis = us-gaap_ProFormaMember
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[4] |
Capitalized |
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(14)us-gaap_InterestCostsCapitalizedAdjustment / us-gaap_BusinessAcquisitionAxis = wti_WoodsidePropertiesMember / us-gaap_StatementScenarioAxis = us-gaap_ProFormaMember
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[5] |
Income tax expense |
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$ 2,039us-gaap_IncomeTaxExpenseBenefit / us-gaap_BusinessAcquisitionAxis = wti_WoodsidePropertiesMember / us-gaap_StatementScenarioAxis = us-gaap_ProFormaMember
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[6] |
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