Derivative Instruments (Schedule Of Fair Market Value Of Derivative Instruments Included On The Balance Sheet) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013
Derivatives, Fair Value [Line Items]
Embedded derivatives	$ (9,245)
Oil And Gas Commodity Derivatives [Member] \| Other Noncurrent Liabilities [Member]
Derivatives, Fair Value [Line Items]
Embedded derivatives	$ (9,245)

Fair value as of the balance sheet date of the embedded derivative or group of embedded derivatives classified as a liability.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 815

-SubTopic 10

-Section 50

-Paragraph 4B

-Subparagraph (c)

-URI http://asc.fasb.org/extlink&oid=7476318&loc=SL5624163-113959

Name:	us-gaap_EmbeddedDerivativeFairValueOfEmbeddedDerivativeLiability
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant