Assets Held For Sale And Discontinued Operations (Schedule Of The Amounts In Net Loss From Discontinued Operations) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended	9 Months Ended
Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Assets Held For Sale And Discontinued Operations [Abstract]
Revenues	$ 5	$ 7	$ 22	$ 19
Production costs and taxes	(25)	(62)	(164)	(228)
Depreciation, depletion, and amortization		(44)		(132)
Gain on sale of assets	128		128
Income tax benefit (expense)	(162)	39	(114)	135
Income (loss) from discontinued operations, net of income tax benefit	$ (54)	$ (60)	$ (128)	$ (206)

Amount of income (loss) from a disposal group, net of income tax before extraordinary items allocable to noncontrolling interests. Includes, net of tax, income (loss) from operations during the phase-out period, gain (loss) on disposal, provision (or any reversals of earlier provisions) for loss on disposal, and adjustments of a prior period gain (loss) on disposal.

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

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