Asset Retirement Obligations (Tables)

3 Months Ended

Mar. 31, 2012

Asset Retirement Obligations [Abstract]

Schedule Of Reconciliation Of Asset Retirement Obligations

(in thousands)
Asset retirement obligations at January 1, 2012	$	58,088
Activity during the period:
Liabilities incurred during the period		264
Liabilities settled during the period		(165	)
Accretion of discount		947
Asset retirement obligations at March 31, 2012		59,134
Less current portion		732
Long-term portion	$	58,402