Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Operating activities
Net income (loss)	$ 110,754us-gaap_ProfitLoss
Current period net (loss) income attributable to parent	110,771us-gaap_NetIncomeLoss	45,094us-gaap_NetIncomeLoss	(33,261)us-gaap_NetIncomeLoss
Adjustments to reconcile net income (loss) to net cash provided by operating activities
Unrealized (gain) loss on derivatives	(58,302)us-gaap_UnrealizedGainLossOnDerivatives	7,232us-gaap_UnrealizedGainLossOnDerivatives	4,802us-gaap_UnrealizedGainLossOnDerivatives
Depletion, depreciation and amortization	134,737	98,395	80,454
Accretion of asset retirement obligations	504	348	256
Full-cost ceiling impairment	0us-gaap_ImpairmentOfOilAndGasProperties	21,229us-gaap_ImpairmentOfOilAndGasProperties	63,475us-gaap_ImpairmentOfOilAndGasProperties
Stock-based compensation expense	5,524us-gaap_ShareBasedCompensation	3,897us-gaap_ShareBasedCompensation	140us-gaap_ShareBasedCompensation
Deferred income tax provision (benefit)	64,242us-gaap_DeferredIncomeTaxExpenseBenefit	9,293us-gaap_DeferredIncomeTaxExpenseBenefit	(1,430)us-gaap_DeferredIncomeTaxExpenseBenefit
Loss on asset sales and inventory impairment	0	192	485
Changes in operating assets and liabilities
Accounts receivable	(13,318)	(2,160)	(16,342)
Lease and well equipment inventory	(211)mtdr_LeaseAndWellEquipmentInventories	243mtdr_LeaseAndWellEquipmentInventories	50mtdr_LeaseAndWellEquipmentInventories
Prepaid expenses	(783)	(668)	50
Other assets	1,212	(548)	(673)
Accounts payable, accrued liabilities and other current liabilities	607	(3,638)	19,740
Royalties payable	6,663	1,257	4,685
Advances from joint interest owners	0	(1,515)	1,515
Income taxes payable	39	404	0
Other long-term liabilities	(187)	415	282
Net cash provided by operating activities	251,481	179,470	124,228
Investing activities
Proceeds from Sale of Oil and Gas Property and Equipment	79	0	0
Oil and natural gas properties capital expenditures	(560,849)	(363,192)	(300,689)
Expenditures for other property and equipment	(9,152)	(3,977)	(7,332)
Purchases of certificates of deposit	0mtdr_PurchasesOfCertificatesOfDeposit	(61)mtdr_PurchasesOfCertificatesOfDeposit	(496)mtdr_PurchasesOfCertificatesOfDeposit
Maturities of certificates of deposit	0mtdr_SalesOfCertificatesOfDeposit	291mtdr_SalesOfCertificatesOfDeposit	1,601mtdr_SalesOfCertificatesOfDeposit
Restricted Cash and Cash Equivalents	(609)
Net cash used in investing activities	(570,531)	(366,939)	(306,916)
Financing activities
Repayments of borrowings under Credit Agreement	(180,000)us-gaap_RepaymentsOfLinesOfCredit	(130,000)us-gaap_RepaymentsOfLinesOfCredit	(123,000)us-gaap_RepaymentsOfLinesOfCredit
Borrowings under Credit Agreement	320,000us-gaap_ProceedsFromLinesOfCredit	180,000us-gaap_ProceedsFromLinesOfCredit	160,000us-gaap_ProceedsFromLinesOfCredit
Proceeds from issuance of common stock	181,875	149,069	146,510
Swing sale profit contribution	0mtdr_SwingSaleProfit	0mtdr_SwingSaleProfit	(24)mtdr_SwingSaleProfit
Cost to issue equity	(590)us-gaap_PaymentsOfStockIssuanceCosts	(7,390)us-gaap_PaymentsOfStockIssuanceCosts	(11,599)us-gaap_PaymentsOfStockIssuanceCosts
Proceeds from stock options exercised	43	0	2,660
Proceeds from Noncontrolling Interests	150
Taxes paid related to net share settlement of stock-based compensation	(308)	(18)	0
Payment of dividends - Class B	0us-gaap_PaymentsOfDividendsCommonStock	0us-gaap_PaymentsOfDividendsCommonStock	(96)us-gaap_PaymentsOfDividendsCommonStock
Net cash provided by financing activities	321,170	191,661	174,499
Increase (decrease) in cash	2,120	4,192	(8,189)
Cash at beginning of year	6,287	2,095	10,284
Cash at end of year	$ 8,407	$ 6,287	$ 2,095

The increase (decrease) in payments made in advance by joint interest partners in oil and gas properties.

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Amount of accretion expense recognized during the period that is associated with an asset retirement obligation. Accretion expense measures and incorporates changes due to the passage of time into the carrying amount of the liability.

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The increase (decrease) during the reporting period in the amounts payable to taxing authorities for taxes that are based on the reporting entity's earnings, net of amounts receivable from taxing authorities for refunds of overpayments or recoveries of income taxes.

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The increase (decrease) during the reporting period in the obligations due for compensation payments related to the use of copyrights, patents, trade names, licenses, technology. Royalty payments are also paid by the lease holders for oil, gas, and mineral extraction.

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