Divestitures and Discontinued Operations (Tables)

6 Months Ended

Jun. 30, 2012

Discontinued Operations and Disposal Groups [Abstract]

Schedule of Disposal Groups, Including Discontinued Operations, Income Statement, Balance Sheet and Additional Disclosures [Table Text Block]

Selected financial information related to divested and discontinued operations. The table below presents selected operational information related to discontinued operations. While the reclassification of revenues and expenses related to discontinued operations for the prior period had no impact on previously reported net earnings, the statement of operations table below presents the revenues and expenses that were reclassified from the specified statement of operations line items to discontinued operations. The six months ended 2011, in addition to the discontinued operations data of our Permian assets, includes operations data related to the February 2011 divestiture of our North Dakota assets.

	Three Months Ended June 30,					Six Months Ended June 30,
Statement of Operations - Discontinued Operations	2012			2011		2012			2011
	(dollars in thousands)
Revenues
Natural gas, NGL and crude oil sales	$	—		$	6,453	$	4,456		$	11,969
Well operations, pipeline income and other	—			26		34			69
Total revenues	—			6,479		4,490			12,038
Costs, expenses and other
Production costs	—			2,779		1,668			5,478
Exploration expense	—			6		—			35
Depreciation, depletion and amortization	—			2,082		—			3,454
(Gain) loss on sale of properties and equipment	415			—		(19,920		)	(3,854		)
Total costs, expenses and other	415			4,867		(18,252		)	5,113
Income (loss) from discontinued operations	(415		)	1,612		22,742			6,925
Provision for income taxes	(34		)	612		8,668			2,602
Income (loss) from discontinued operations, net of tax	$	(381	)	$	1,000	$	14,074		$	4,323