ASSET RETIREMENT OBLIGATIONS (Tables)

6 Months Ended

Jun. 30, 2014

ASSET RETIREMENT OBLIGATIONS [Abstract]

Asset Retirement Obligations Operating Costs

	Three Months Ended		Six Months Ended
		June 30		June 30
in thousands	2014	2013	2014	2013
ARO Operating Costs
Accretion	$        2,913	$        2,817	$        5,852	$        4,823
Depreciation	983	830	1,980	1,609
Total	$        3,896	$        3,647	$        7,832	$        6,432

Reconciliations of Asset Retirement Obligations

	Three Months Ended		Six Months Ended
		June 30		June 30
in thousands	2014	2013	2014	2013
Asset Retirement Obligations
Balance at beginning of period	$     225,831	$     156,458	$     228,234	$     150,072
Liabilities incurred	0	65,587	0	65,587
Liabilities settled	(7,593)	(5,219)	(12,843)	(6,511)
Accretion expense	2,913	2,817	5,852	4,823
Revisions up (down), net	3,966	3,208	3,874	8,880
Balance at end of period	$     225,117	$     222,851	$     225,117	$     222,851