Guarantor Subsidiaries (Cash Flow Statement) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Cash Flows from Operating Activities:
Net loss	$ (840,255)us-gaap_NetIncomeLoss	$ (95,479)us-gaap_NetIncomeLoss	$ (126,226)us-gaap_NetIncomeLoss
Adjustments to reconcile net loss to net cash provided by operating activities:
DD&A expense	175,744	143,048	66,564
Impairment of oil and gas properties	476,721us-gaap_ImpairmentOfOilAndGasProperties	9,566us-gaap_ImpairmentOfOilAndGasProperties	53,072us-gaap_ImpairmentOfOilAndGasProperties
Goodwill impairment loss	259,238us-gaap_GoodwillImpairmentLoss
Deferred tax expense (benefit)	(63,755)us-gaap_DeferredIncomeTaxExpenseBenefit	(14,255)us-gaap_DeferredIncomeTaxExpenseBenefit	(17,594)us-gaap_DeferredIncomeTaxExpenseBenefit
Unrealized (gains) losses on derivatives	(10,818)us-gaap_UnrealizedGainLossOnDerivatives	1,843us-gaap_UnrealizedGainLossOnDerivatives	(5,141)us-gaap_UnrealizedGainLossOnDerivatives
Amortization of non-cash compensation	(116)	3,606	4,401
Amortization of loan costs and discount	22,239	22,359	14,179
Non-cash interest expense	5,739us-gaap_PaidInKindInterest	7,082us-gaap_PaidInKindInterest	8,684us-gaap_PaidInKindInterest
Loss on early extinguishment of debt	22,708		21,661
Non-cash litigation settlement expense	14,034end_NoncashLitigationSettlementExpense
Non-cash reorganization items	33,518end_NonCashReorganizationItems
Other	(7,347)us-gaap_OtherNoncashIncomeExpense	16,330us-gaap_OtherNoncashIncomeExpense	15,365us-gaap_OtherNoncashIncomeExpense
Changes in operating assets and liabilities:
Decrease (increase) in receivables	29,486	(18,991)	(24,319)
Decrease (increase) in other current assets	(16,267)	1,324	(592)
Increase (decrease) in liabilities	(32,982)	(18,985)	28,559
Net Cash Provided by (Used in) Operating Activities	67,887	57,448	38,613
Cash Flows From Investing Activities:
Capital expenditures	(91,619)	(225,755)	(246,925)
Acquisitions, net of cash acquired		(2,787)	(238,854)
Proceeds from sales, net of cash	1,353	6,774	1,407
Proceeds from insurance settlement	15,120
Increase in restricted cash	(100,113)		(178)
Net Cash Used in Investing Activities	(175,259)	(221,768)	(484,550)
Cash Flows From Financing Activities:
Repayments of borrowings	(240,163)us-gaap_RepaymentsOfDebt		(274,629)us-gaap_RepaymentsOfDebt
Borrowings under debt agreements, net of debt discount	571,825		654,023
Proceeds from issuance of common stock	12,396		60,805
Proceeds from issuance of MPP		175,000
Repayments of MPP	(166,667)	(8,333)
Payments for early extinguishment of debt			(7,248)
Financing costs paid	(19,809)us-gaap_PaymentsOfDebtIssuanceCosts	(25,210)us-gaap_PaymentsOfDebtIssuanceCosts	(32,204)us-gaap_PaymentsOfDebtIssuanceCosts
Other financing	(3,102)	(1,580)	(1,661)
Net Cash Provided by (Used in) Financing Activities	154,480	139,877	399,086
Net Change in Cash and Cash Equivalents	47,108	(24,443)	(46,851)
Cash and Cash Equivalents, Beginning of Period	34,742	59,185	106,036
Cash and Cash Equivalents, End of Period	81,850	34,742	59,185
Eliminations [Member]
Cash Flows from Operating Activities:
Net loss			6,997
Adjustments to reconcile net loss to net cash provided by operating activities:
Deferred tax expense (benefit)			(6,997)
Amortization of non-cash compensation	(857)	2,984	3,547
Non-cash litigation settlement expense	14,034
Changes in operating assets and liabilities:
Increase (decrease) in liabilities		19,038	(38,459)
Net Cash Provided by (Used in) Operating Activities	13,177	22,022	(34,912)
Cash Flows From Investing Activities:
Capital expenditures		1,237
Issuance of note receivable to affiliates			500,000
Net Cash Used in Investing Activities		1,237	500,000
Cash Flows From Financing Activities:
Borrowings from affiliates			(500,000)
Financing costs paid		11,286
Intercompany cash management	(13,177)	(34,545)	34,912
Net Cash Provided by (Used in) Financing Activities	(13,177)	(23,259)	(465,088)
Endeavour International Corporation [Member]
Cash Flows from Operating Activities:
Net loss	(23,957)	(84,432)	(4,415)
Adjustments to reconcile net loss to net cash provided by operating activities:
Unrealized (gains) losses on derivatives	(5,115)	503	705
Amortization of non-cash compensation	741	622	854
Amortization of loan costs and discount	7,065	7,826	6,908
Non-cash interest expense			445
Non-cash reorganization items	29,619
Other		44	283
Changes in operating assets and liabilities:
Decrease (increase) in other current assets	142
Increase (decrease) in liabilities	19,405
Net Cash Provided by (Used in) Operating Activities	27,900	(75,437)	4,780
Cash Flows From Financing Activities:
Repayments of borrowings			(32,457)
Borrowings under debt agreements, net of debt discount	17,500		538,860
Proceeds from issuance of common stock	12,396		60,805
Financing costs paid	(625)	(700)	(24,141)
Intercompany cash management	(54,069)	77,874	(546,186)
Other financing	(3,102)	(1,737)	(1,661)
Net Cash Provided by (Used in) Financing Activities	(27,900)	75,437	(4,780)
Combined Guarantor Subsidiaries [Member]
Cash Flows from Operating Activities:
Net loss	(113,483)	39,841	(86,968)
Adjustments to reconcile net loss to net cash provided by operating activities:
DD&A expense	2,523	4,249	8,603
Impairment of oil and gas properties	71,562	9,566	53,072
Amortization of loan costs and discount			5
Non-cash interest expense		(12,958)
Other	(182,517)	12,942	173
Changes in operating assets and liabilities:
Decrease (increase) in receivables	55,069	863	1,495
Decrease (increase) in other current assets	(6,651)	(14,252)	(9,223)
Increase (decrease) in liabilities	150,614	(13,628)	88,635
Net Cash Provided by (Used in) Operating Activities	(22,883)	26,623	55,792
Cash Flows From Investing Activities:
Capital expenditures	(16,077)	(15,111)	(39,794)
Acquisitions, net of cash acquired		65	(2,372)
Proceeds from sales, net of cash	1,353	6,712
Issuance of note receivable to affiliates			(500,000)
Increase in restricted cash			(50)
Net Cash Used in Investing Activities	(14,724)	(8,334)	(542,216)
Cash Flows From Financing Activities:
Financing costs paid		(500)
Intercompany cash management	67,246	(43,329)	511,274
Other financing	(1)	157	(1)
Net Cash Provided by (Used in) Financing Activities	67,245	(43,672)	511,273
Net Change in Cash and Cash Equivalents	29,638	(25,383)	24,849
Cash and Cash Equivalents, Beginning of Period	2,417	27,800	2,951
Cash and Cash Equivalents, End of Period	32,055	2,417	27,800
Combined Non- Guarantor Subsidiaries [Member]
Cash Flows from Operating Activities:
Net loss	(702,815)	(50,888)	(41,840)
Adjustments to reconcile net loss to net cash provided by operating activities:
DD&A expense	173,221	138,799	57,961
Impairment of oil and gas properties	405,159
Goodwill impairment loss	259,238
Deferred tax expense (benefit)	(63,755)	(14,255)	(10,597)
Unrealized (gains) losses on derivatives	(5,703)	1,340	(5,846)
Amortization of loan costs and discount	15,174	14,533	7,266
Non-cash interest expense	5,739	20,040	8,239
Loss on early extinguishment of debt	22,708		21,661
Non-cash reorganization items	3,899
Other	175,170	3,344	14,909
Changes in operating assets and liabilities:
Decrease (increase) in receivables	(25,583)	(19,854)	(25,814)
Decrease (increase) in other current assets	(9,758)	15,576	8,631
Increase (decrease) in liabilities	(203,001)	(24,395)	(21,617)
Net Cash Provided by (Used in) Operating Activities	49,693	84,240	12,953
Cash Flows From Investing Activities:
Capital expenditures	(75,542)	(211,881)	(207,131)
Acquisitions, net of cash acquired		(2,852)	(236,482)
Proceeds from sales, net of cash		62	1,407
Proceeds from insurance settlement	15,120
Increase in restricted cash	(100,113)		(128)
Net Cash Used in Investing Activities	(160,535)	(214,671)	(442,334)
Cash Flows From Financing Activities:
Repayments of borrowings	(240,163)		(242,172)
Borrowings under debt agreements, net of debt discount	554,325		115,163
Borrowings from affiliates			500,000
Proceeds from issuance of MPP		175,000
Repayments of MPP	(166,667)	(8,333)
Payments for early extinguishment of debt			(7,248)
Financing costs paid	(19,184)	(35,296)	(8,063)
Other financing	1		1
Net Cash Provided by (Used in) Financing Activities	128,312	131,371	357,681
Net Change in Cash and Cash Equivalents	17,470	940	(71,700)
Cash and Cash Equivalents, Beginning of Period	32,325	31,385	103,085
Cash and Cash Equivalents, End of Period	$ 49,795	$ 32,325	$ 31,385

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The cash inflow to dispose of long-lived, physical assets and mineral interests in oil and gas properties used for normal oil and gas operations.

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