COMMITMENTS AND CONTINGENCIES Commitments and Contigencies (Tables)

12 Months Ended

Dec. 31, 2012

Commitments and Contingencies Disclosure [Abstract]

Supply Commitment [Table Text Block]

The following table presents gross volume information, including our proportionate share of PDCM, related to our long-term firm transportation, sales and processing agreements for pipeline capacity:

	Year Ending December 31,
Area	2013		2014		2015		2016		2017 Through Expiration		Total		Expiration Date
Volume (MMcf)
Piceance Basin	30,710		36,168		30,603		26,053		85,895		209,429		May 31, 2021
Appalachian Basin	20,316		24,353		23,361		24,862		168,296		261,188		September 20, 2025
NECO	2,190		1,825		1,825		1,825		—		7,665		December 31, 2016
Total	53,216		62,346		55,789		52,740		254,191		478,282
Dollar commitment (in thousands)	$	25,756	$	29,283	$	26,163	$	24,075	$	94,033	$	199,310

Schedule of Minimum Future Lease Payments under the Non-cancelable Operating Leases [Table Text Block]

The following table presents the minimum future lease payments under the non-cancelable operating leases as of December 31, 2012:

	Year Ending December 31,
	2013		2014		2015		2016		2017		Thereafter		Total
	(in thousands)
Minimum Lease Payments	$	2,607	$	2,386	$	1,929	$	461	$	255	$	887	$	8,525