Asset Retirement Obligations (Tables)

6 Months Ended

Jun. 30, 2012

Asset Retirement Obligations [Abstract]

Schedule Of Change In Asset Retirement Obligation

		Six Months Ended
		June 30, 2012
Beginning of period	$	65,701
Assumed in acquisition		4,738
Divested		(23)
Revisions to previous estimates		1,223
Liabilities incurred		-
Liabilities settled		(909)
Accretion expense		1,730
End of period	$	72,460
Less: Current portion of asset retirement obligations		(808)
Asset retirement obligations - non-current	$	71,652