Acquisitions (Tables)

6 Months Ended

Jun. 30, 2011

Acquisitions

Consideration paid to sellers and recognized amounts of identifiable assets acquired and liabilities assumed

The following table summarizes the consideration paid and the amounts of the assets acquired and liabilities assumed as of May 25, 2011:

		(in thousands)
Consideration paid to sellers:
Cash consideration		$	129,376
Recognized amounts of identifiable assets acquired and liabilities assumed:
	Proved developed and undeveloped properties		129,631
	Asset retirement obligation		(119	)
	Other liabilities assumed		(136	)
Total identifiable net assets		$	129,376

        The following table summarizes the consideration paid to the sellers and the amounts of the assets acquired and liabilities assumed in the Permian Acquisitions:

		(in thousands)
Consideration paid to sellers:
Cash consideration		$	327,032
Recognized amounts of identifiable assets acquired and liabilities assumed:
	Proved developed and undeveloped properties		332,214
	Other assets acquired		342
	Asset retirement obligation		(3,498	)
	Deferred income tax liability		(647	)
	Other liabilities assumed		(333	)
Total identifiable net assets		$	328,078