ASSET RETIREMENT OBLIGATIONS (Tables)

12 Months Ended

Dec. 31, 2013

ASSET RETIREMENT OBLIGATIONS [Abstract]

Asset Retirement Obligations Operating Costs

in thousands	2013	2012	2011
ARO Operating Costs
Accretion	$        10,685	$          7,956	$        8,195
Depreciation	3,527	5,599	7,242
Total	$        14,212	$        13,555	$      15,437

Reconciliations of Asset Retirement Obligations

in thousands	2013	2012
Asset Retirement Obligations
Balance at beginning of year	$      150,072	$      153,979
Liabilities incurred	69,111	127
Liabilities settled	(16,203)	(2,993)
Accretion expense	10,685	7,956
Revisions up (down), net	14,569	(8,997)
Balance at end of year	$      228,234	$      150,072