ASSET RETIREMENT OBLIGATION (Tables)

9 Months Ended

Sep. 30, 2013

ASSET RETIREMENT OBLIGATION

Schedule of reconciliation of the Company's asset retirement obligations

	September 30,
	2013
	(in thousands)
Balance at beginning of period	$	25,236
Liabilities incurred in current period	1,037
Liabilities settled in current period	(1,647		)
Accretion expense	1,660
Balance at end of period	$	26,286