Suspended Exploratory Well Costs - Additional Information (Details) (USD $) In Millions, unless otherwise specified	1 Months Ended
Nov. 30, 2013 ft	Dec. 31, 2013
Extractive Industries [Abstract]
Hydrocarbons miocene formation intervals as interpreted by the logging while drilling	65
Suspended exploratory well cost		$ 26.5

The amount of exploratory well costs that have been capitalized for a period of one year or less after the completion of drilling.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 932

-SubTopic 235

-Section 50

-Paragraph 16

-URI http://asc.fasb.org/extlink&oid=8451039&loc=d3e61939-109447

Name:	us-gaap_CapitalizedExploratoryWellCostsThatHaveBeenCapitalizedForPeriodOfOneYearOrLess
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant