Supplemental Oil and Gas Disclosures - Schedule of Depreciation, Depletion, Amortization and Accretion Expense (Details)

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Supplemental Oil and Gas Disclosures - Schedule of Depreciation, Depletion, Amortization and Accretion Expense (Details)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Capitalized Costs Oil And Gas Producing Activities Net [Abstract]
Depreciation, depletion, amortization and accretion per Boe	28.98wti_DepreciationDepletionAmortizationAndAccretionPerBoe	25.10wti_DepreciationDepletionAmortizationAndAccretionPerBoe	20.79wti_DepreciationDepletionAmortizationAndAccretionPerBoe