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Acquisitions and Divestitures - Purchase Price Allocation for Acquisition (Details) (USD $)
In Thousands, unless otherwise specified
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0 Months Ended |
1 Months Ended |
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Sep. 15, 2014
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May 20, 2014
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Oct. 17, 2013
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May 11, 2011
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| Fairway |
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| Non-cash consideration: |
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| Asset retirement obligations - non-current |
$ 6,124us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNoncurrentLiabilitiesOther
/ us-gaap_BusinessAcquisitionAxis
= wti_FairwayPropertiesMember
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| Total consideration |
23,531us-gaap_BusinessCombinationConsiderationTransferred1
/ us-gaap_BusinessAcquisitionAxis
= wti_FairwayPropertiesMember
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| Fairway | Evaluated Properties Including Equipment |
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| Cash consideration: |
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| Oil and natural gas properties and equipment |
17,407us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedPropertyPlantAndEquipment
/ us-gaap_BusinessAcquisitionAxis
= wti_FairwayPropertiesMember
/ us-gaap_RealEstatePropertiesAxis
= wti_EvaluatedPropertiesMember
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| Woodside Properties |
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| Cash consideration: |
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| Oil and natural gas properties and equipment |
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54,827us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedPropertyPlantAndEquipment
/ us-gaap_BusinessAcquisitionAxis
= wti_WoodsidePropertiesMember
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| Non-cash consideration: |
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| Asset retirement obligations - non-current |
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10,543us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNoncurrentLiabilitiesOther
/ us-gaap_BusinessAcquisitionAxis
= wti_WoodsidePropertiesMember
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| Asset retirement obligations - current |
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782us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesOther
/ us-gaap_BusinessAcquisitionAxis
= wti_WoodsidePropertiesMember
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| Non-cash consideration |
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11,325us-gaap_BusinessCombinationConsiderationTransferredLiabilitiesIncurred
/ us-gaap_BusinessAcquisitionAxis
= wti_WoodsidePropertiesMember
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| Total consideration |
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66,152us-gaap_BusinessCombinationConsiderationTransferred1
/ us-gaap_BusinessAcquisitionAxis
= wti_WoodsidePropertiesMember
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| Woodside Properties | Evaluated Properties Including Equipment |
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| Cash consideration: |
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| Oil and natural gas properties and equipment |
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52,167us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedPropertyPlantAndEquipment
/ us-gaap_BusinessAcquisitionAxis
= wti_WoodsidePropertiesMember
/ us-gaap_RealEstatePropertiesAxis
= wti_EvaluatedPropertiesMember
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| Woodside Properties | Unevaluated Properties |
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| Cash consideration: |
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| Oil and natural gas properties and equipment |
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2,660us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedPropertyPlantAndEquipment
/ us-gaap_BusinessAcquisitionAxis
= wti_WoodsidePropertiesMember
/ us-gaap_RealEstatePropertiesAxis
= wti_UnevaluatedPropertiesMember
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| Callon Properties |
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| Cash consideration: |
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| Oil and natural gas properties and equipment |
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83,000us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedPropertyPlantAndEquipment
/ us-gaap_BusinessAcquisitionAxis
= wti_CallonPropertiesMember
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| Non-cash consideration: |
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| Asset retirement obligations - non-current |
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4,143us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNoncurrentLiabilitiesOther
/ us-gaap_BusinessAcquisitionAxis
= wti_CallonPropertiesMember
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| Asset retirement obligations - current |
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90us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesOther
/ us-gaap_BusinessAcquisitionAxis
= wti_CallonPropertiesMember
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| Non-cash consideration |
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4,233us-gaap_BusinessCombinationConsiderationTransferredLiabilitiesIncurred
/ us-gaap_BusinessAcquisitionAxis
= wti_CallonPropertiesMember
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| Total consideration |
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87,233us-gaap_BusinessCombinationConsiderationTransferred1
/ us-gaap_BusinessAcquisitionAxis
= wti_CallonPropertiesMember
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| Callon Properties | Evaluated Properties Including Equipment |
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| Cash consideration: |
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| Oil and natural gas properties and equipment |
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73,752us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedPropertyPlantAndEquipment
/ us-gaap_BusinessAcquisitionAxis
= wti_CallonPropertiesMember
/ us-gaap_RealEstatePropertiesAxis
= wti_EvaluatedPropertiesMember
|
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| Callon Properties | Unevaluated Properties |
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| Cash consideration: |
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| Oil and natural gas properties and equipment |
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9,248us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedPropertyPlantAndEquipment
/ us-gaap_BusinessAcquisitionAxis
= wti_CallonPropertiesMember
/ us-gaap_RealEstatePropertiesAxis
= wti_UnevaluatedPropertiesMember
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| Newfield Properties |
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| Cash consideration: |
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| Oil and natural gas properties and equipment |
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205,788us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedPropertyPlantAndEquipment
/ us-gaap_BusinessAcquisitionAxis
= wti_NewfieldPropertiesMember
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| Non-cash consideration: |
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| Asset retirement obligations - non-current |
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24,414us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNoncurrentLiabilitiesOther
/ us-gaap_BusinessAcquisitionAxis
= wti_NewfieldPropertiesMember
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| Asset retirement obligations - current |
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7,250us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesOther
/ us-gaap_BusinessAcquisitionAxis
= wti_NewfieldPropertiesMember
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| Non-cash consideration |
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31,664us-gaap_BusinessCombinationConsiderationTransferredLiabilitiesIncurred
/ us-gaap_BusinessAcquisitionAxis
= wti_NewfieldPropertiesMember
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| Total consideration |
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237,452us-gaap_BusinessCombinationConsiderationTransferred1
/ us-gaap_BusinessAcquisitionAxis
= wti_NewfieldPropertiesMember
|
| Newfield Properties | Evaluated Properties Including Equipment |
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| Cash consideration: |
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| Oil and natural gas properties and equipment |
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192,723us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedPropertyPlantAndEquipment
/ us-gaap_BusinessAcquisitionAxis
= wti_NewfieldPropertiesMember
/ us-gaap_RealEstatePropertiesAxis
= wti_EvaluatedPropertiesMember
|
| Newfield Properties | Unevaluated Properties |
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| Cash consideration: |
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| Oil and natural gas properties and equipment |
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$ 13,065us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedPropertyPlantAndEquipment
/ us-gaap_BusinessAcquisitionAxis
= wti_NewfieldPropertiesMember
/ us-gaap_RealEstatePropertiesAxis
= wti_UnevaluatedPropertiesMember
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