ASSET RETIREMENT OBLIGATIONS Asset Retirement Obligations (Tables)

12 Months Ended

Dec. 31, 2013

Asset Retirement Obligation Disclosure [Abstract]

Schedule of Change in Asset Retirement Obligation [Table Text Block]

The following table presents the changes in carrying amounts of the asset retirement obligations associated with our working interest in crude oil and natural gas properties:

	2013			2012
	(in thousands)
Balance at beginning of year, January 1	$	62,563		$	46,566
Obligations incurred with development activities and assumed with acquisitions	2,389			14,169
Accretion expense	4,747			4,060
Revisions in estimated cash flows	612			—
Obligations discharged with divestitures of properties and asset retirements (1)	(29,281		)	(2,232		)
Balance end of year, December 31	41,030			62,563
Less: Liabilities held for sale (1)	(2,061		)	—
Less: Current portion	(1,158		)	(1,000		)
Long-term portion	$	37,811		$	61,563