ASSET RETIREMENT OBLIGATIONS (Tables)

3 Months Ended

Mar. 31, 2014

ASSET RETIREMENT OBLIGATIONS [Abstract]

Asset Retirement Obligations Operating Costs

	Three Months Ended
		March 31
in thousands	2014	2013
ARO Operating Costs
Accretion	$        2,940	$        2,006
Depreciation	997	779
Total	$        3,937	$        2,785

Reconciliations of Asset Retirement Obligations

	Three Months Ended
		March 31
in thousands	2014	2013
Asset Retirement Obligations
Balance at beginning of year	$     228,234	$     150,072
Liabilities incurred	0	0
Liabilities settled	(5,250)	(1,292)
Accretion expense	2,940	2,006
Revisions up (down), net	(93)	5,672
Balance at end of period	$     225,831	$     156,458