Acquisitions and Divestitures (Tables)

6 Months Ended

Jun. 30, 2012

Acquisitions and Divestitures (Tables) [Abstract]

Schedule of Business Acquisitions, Thompson Field

In thousands
Consideration:
	Cash payment(1)		$	366,178
		Total consideration		366,178
Less: Fair value of assets acquired and liabilities assumed:(2)
	Oil and natural gas properties
		Proved		232,467
		Unevaluated		4,151
	Pipelines and plants			2,000
	Other assets			3,637
	Asset retirement obligations			(3,306)
				238,949
Goodwill			$	127,229
(1)		See Divestitures below for additional information regarding restricted cash and the like-kind exchange transaction utilized to fund the purchase.
(2)		Fair value of the assets acquired and liabilities assumed is preliminary, pending final closing adjustments and further evaluation of reserves and asset retirement obligations.

Business Acquisition, Pro Forma Information, Thompson Field

		Three Months Ended June 30,				Six Months Ended June 30,
In thousands, except per share amounts		2012		2011		2012		2011
Pro forma total revenues		$	617,500	$	617,446	$	1,286,717	$	1,144,976
Pro forma net income			218,027		264,543		340,950		254,074
Pro forma net income per common share
	Basic	$	0.56	$	0.66	$	0.88	$	0.64
	Diluted		0.56		0.65		0.87		0.63