Asset Retirement Obligations (Tables)

6 Months Ended

Jun. 30, 2013

Asset Retirement Obligations [Abstract]

Schedule Of Change In Asset Retirement Obligation

		Six Months Ended
		June 30, 2013
Beginning of period	$	126,991
Revisions to previous estimates		2,494
Liabilities incurred		162
Liabilities settled		(3,000)
Accretion expense		3,490
End of period	$	130,137
Less: Current portion of asset retirement obligations		(1,562)
Asset retirement obligations - non-current	$	128,575