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Significant Accounting Policies - Additional Information (Details) (USD $)
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3 Months Ended | 12 Months Ended | ||
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Dec. 31, 2013
MMcf
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Dec. 31, 2014
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Dec. 31, 2013
MMcf
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Dec. 31, 2012
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| Significant Accounting Policies [Line Items] | ||||
| Increase in natural gas production volumes | 2,600wti_IncreaseInProduction | 1,900wti_IncreaseInProduction | ||
| Natural gas imbalances | $ 6,400,000us-gaap_GasImbalanceAssetLiability | $ 6,400,000us-gaap_GasImbalanceAssetLiability | $ 6,400,000us-gaap_GasImbalanceAssetLiability | |
| Percentage of discount from proved reserves | 10.00%wti_PercentageOfDiscountFromProvedReserves | |||
| Ceiling test impairment | 0us-gaap_ImpairmentOfOilAndGasProperties | 0us-gaap_ImpairmentOfOilAndGasProperties | 0us-gaap_ImpairmentOfOilAndGasProperties | |
| Proved undeveloped reserves classification period to be drilled | 5 years | |||
| Goodwill, acquired during period | 0us-gaap_GoodwillAcquiredDuringPeriod | 0us-gaap_GoodwillAcquiredDuringPeriod | 0us-gaap_GoodwillAcquiredDuringPeriod | |
| Payments received related to break-up fee and termination of certain purchase and sale agreement | 9,200,000us-gaap_GainLossOnContractTermination | |||
| Third-party expenses related to the cancelled transaction | 100,000us-gaap_OtherExpenses | |||
| Fixtures and Non-Oil and Natural Gas Property and Equipment | Minimum | ||||
| Significant Accounting Policies [Line Items] | ||||
| Estimated useful lives | 5 years | |||
| Fixtures and Non-Oil and Natural Gas Property and Equipment | Maximum | ||||
| Significant Accounting Policies [Line Items] | ||||
| Estimated useful lives | 7 years | |||
| Natural Gas | ||||
| Significant Accounting Policies [Line Items] | ||||
| Adjustment to depreciation, depletion, amortization and accretion |
7,100,000wti_AdjustmentToDepreciationDepletionAmortization / us-gaap_ReserveQuantitiesByTypeOfReserveAxis = us-gaap_NaturalGasReservesMember |
5,000,000wti_AdjustmentToDepreciationDepletionAmortization / us-gaap_ReserveQuantitiesByTypeOfReserveAxis = us-gaap_NaturalGasReservesMember |
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| Reduction in net income |
$ 4,600,000wti_ReductionInNetIncome / us-gaap_ReserveQuantitiesByTypeOfReserveAxis = us-gaap_NaturalGasReservesMember |
$ 3,200,000wti_ReductionInNetIncome / us-gaap_ReserveQuantitiesByTypeOfReserveAxis = us-gaap_NaturalGasReservesMember |
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| X | ||||||||||
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- Definition
Gain (loss) related to the termination of a contract between the parties. The termination may be due to many causes including early termination of a lease by a lessee, a breach of contract by one party, or a failure to perform. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
The value of gas balancing asset or liability as of the end of the period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Amount of increase in asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized resulting from a business combination. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
The expense recorded to reduce the value of oil and gas assets consisting of proved properties and unproved properties as the estimate of future successful production from these properties is reduced. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
This element represents a sum total of expenses not separately reflected on the income statement for the period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Useful life of long lived, physical assets used in the normal conduct of business and not intended for resale, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Examples include, but not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment. No definition available.
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- Definition
The adjustment to depreciation, depletion and amortization for an adjustment to production volumes. No definition available.
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- Definition
A one-time increase in production volume for natural gas related to an erroneous conversion of MMBtu occurring in 2011 and 2012. No definition available.
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- Definition
Percentage of discount from proved reserves. No definition available.
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- Definition
Proved undeveloped reserves classification period to be drilled. No definition available.
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- Definition
Adjustment to net income related to adjustments to natural gas production volumes from an erroneous conversion of MMBtu. No definition available.
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