XML 29 R29.htm IDEA: XBRL DOCUMENT v2.4.1.9
Summary of Significant Accounting Policies (Details Textual) (USD $)
3 Months Ended 12 Months Ended
Mar. 31, 2015
Mar. 31, 2014
Mar. 31, 2015
Mar. 31, 2014
Summary of Significant Accounting Policies (Additional Textual) [Abstract]        
Capitalized general and administrative costs $ 1,600,000mtdr_CapitalizedGeneralAndAdministrativeCosts $ 900,000mtdr_CapitalizedGeneralAndAdministrativeCosts    
Capitalized interest expense 979,000us-gaap_InterestCostsCapitalized 670,000us-gaap_InterestCostsCapitalized    
Present value discounted percent of future net revenues of proved oil and natural gas reserves 10.00%mtdr_DiscountingRatePresentValueOfFutureRevenueFromProvedOilAndGasReserves      
Net capitalized costs less related deferred income taxes exceeded the full-cost ceiling 42,800,000us-gaap_UnamortizedCostsCapitalizedLessRelatedDeferredIncomeTaxesExceedCeilingLimitationExpense      
Impairment of Oil and Gas Properties 67,127,000us-gaap_ImpairmentOfOilAndGasProperties 0us-gaap_ImpairmentOfOilAndGasProperties    
Deferred income tax credit $ 24,300,000us-gaap_IncreaseDecreaseInFutureIncomeTaxExpenseEstimatesOnFutureCashFlowsRelatedToProvedOilAndGasReserves      
Oil        
Summary of Significant Accounting Policies (Additional Textual) [Abstract]        
Average oil and natural gas prices     79.21us-gaap_AverageSalesPrices
/ us-gaap_EnergyAxis
= us-gaap_CrudeOilMember
94.92us-gaap_AverageSalesPrices
/ us-gaap_EnergyAxis
= us-gaap_CrudeOilMember
Natural Gas        
Summary of Significant Accounting Policies (Additional Textual) [Abstract]        
Average oil and natural gas prices     3.882us-gaap_AverageSalesPrices
/ us-gaap_EnergyAxis
= us-gaap_NaturalGasReservesMember
3.989us-gaap_AverageSalesPrices
/ us-gaap_EnergyAxis
= us-gaap_NaturalGasReservesMember