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Acquisitions and Divestitures - Additional Information (Details) (USD $)
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3 Months Ended | ||||
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Mar. 31, 2015
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Mar. 31, 2014
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Sep. 15, 2014
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Sep. 14, 2014
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May 20, 2014
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| Business Acquisition [Line Items] | |||||
| Revenues | $ 127,907,000us-gaap_Revenues | $ 254,516,000us-gaap_Revenues | |||
| DD&A | 125,467,000us-gaap_DepreciationAmortizationAndAccretionNet | 123,306,000us-gaap_DepreciationAmortizationAndAccretionNet | |||
| Income tax expense (benefit) | (103,574,000)us-gaap_IncomeTaxExpenseBenefit | 6,648,000us-gaap_IncomeTaxExpenseBenefit | |||
| Net income (loss) | (255,095,000)us-gaap_NetIncomeLoss | 11,189,000us-gaap_NetIncomeLoss | |||
| Fairway | |||||
| Business Acquisition [Line Items] | |||||
| Percentage of working interest |
100.00%wti_PercentageOfWorkingInterest / us-gaap_BusinessAcquisitionAxis = wti_FairwayPropertiesMember |
64.30%wti_PercentageOfWorkingInterest / us-gaap_BusinessAcquisitionAxis = wti_FairwayPropertiesMember |
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| Adjustments to purchase price |
1,300,000us-gaap_PaymentsForPreviousAcquisition / us-gaap_BusinessAcquisitionAxis = wti_FairwayPropertiesMember |
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| Goodwill, acquired during period |
0us-gaap_GoodwillAcquiredDuringPeriod / us-gaap_BusinessAcquisitionAxis = wti_FairwayPropertiesMember |
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| Woodside Properties | |||||
| Business Acquisition [Line Items] | |||||
| Percentage of working interest |
20.00%wti_PercentageOfWorkingInterest / us-gaap_BusinessAcquisitionAxis = wti_WoodsidePropertiesMember |
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| Goodwill, acquired during period |
0us-gaap_GoodwillAcquiredDuringPeriod / us-gaap_BusinessAcquisitionAxis = wti_WoodsidePropertiesMember |
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| Revenues |
5,500,000us-gaap_Revenues / us-gaap_BusinessAcquisitionAxis = wti_WoodsidePropertiesMember |
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| Direct operating expenses |
3,200,000us-gaap_OperatingCostsAndExpenses / us-gaap_BusinessAcquisitionAxis = wti_WoodsidePropertiesMember |
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| DD&A |
4,100,000us-gaap_DepreciationAmortizationAndAccretionNet / us-gaap_BusinessAcquisitionAxis = wti_WoodsidePropertiesMember |
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| Income tax expense (benefit) |
600,000us-gaap_IncomeTaxExpenseBenefit / us-gaap_BusinessAcquisitionAxis = wti_WoodsidePropertiesMember |
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| Net income (loss) |
$ (1,200,000)us-gaap_NetIncomeLoss / us-gaap_BusinessAcquisitionAxis = wti_WoodsidePropertiesMember |
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| X | ||||||||||
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- Details
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| X | ||||||||||
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- Definition
The aggregate net amount of depreciation, amortization, and accretion recognized during an accounting period. As a noncash item, the net amount is added back to net income when calculating cash provided by or used in operations using the indirect method. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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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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| X | ||||||||||
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- Definition
Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
The portion of profit or loss for the period, net of income taxes, which is attributable to the parent. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Generally recurring costs associated with normal operations except for the portion of these expenses which can be clearly related to production and included in cost of sales or services. Excludes Selling, General and Administrative Expense. No definition available.
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| X | ||||||||||
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- Definition
Cash outflow representing an adjustment to the purchase price of a previous acquisition. No definition available.
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| X | ||||||||||
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- Definition
Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss). Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Percentage of working interest. No definition available.
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- Details
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| X | ||||||||||
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- Details
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