Document and Entity Information (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Mar. 27, 2015	Jun. 30, 2014
Document And Entity Information [Abstract]
Document type	10-K
Document period end date	Dec. 31, 2014
Amendment flag	false
Document Fiscal Period Focus	FY
Document Fiscal Year Focus	2014
Current fiscal year end date	--12-31
Entity central index key	0001112412
Entity filer category	Accelerated Filer
Entity registrant name	Endeavour International Corporation
Entity Common Stock, Shares Outstanding		52.9
Entity well known seasoned issuer	No
Entity current reporting status	Yes
Entity voluntary filers	No
Entity Public Float			$ 64.3