ASSET RETIREMENT OBLIGATION (Tables)

6 Months Ended

Jun. 30, 2013

ASSET RETIREMENT OBLIGATION

Schedule of reconciliation of the Company's asset retirement obligations

	June 30,
	2013
	(in thousands)
Balance at beginning of period	$	25,236
Liabilities incurred in current period	395
Liabilities settled in current period	(1,194		)
Accretion expense	1,093
Balance at end of period	$	25,530