ASSET RETIREMENT OBLIGATION (Tables)

3 Months Ended

Mar. 31, 2013

ASSET RETIREMENT OBLIGATION

Schedule of reconciliation of the Company's asset retirement obligations

	March 31,
	2013
	(in thousands)
Balance at beginning of period	$	25,236
Liabilities incurred in current period	37
Liabilities settled in current period	(750		)
Accretion expense	542
Balance at end of period	$	25,065