Property, Plant and Equipment (Tables)

9 Months Ended

Sep. 30, 2013

Property, Plant and Equipment [Abstract]

Collaborative Arrangement Disclosure [Text Block]

The following table provides information about our industry participation agreements as of September 30, 2013:

Shale Play	Industry Participation Agreement Partner	Industry Participation Agreement Date	Drilling Carries Remaining*
Marcellus	Noble Energy, Inc.	September 30, 2011	$	1,885,785
Utica	Hess Ohio Developments, LLC	October 21, 2011	$	255,148

Property, Plant and Equipment

	September 30, 2013		December 31, 2012
Coal and other plant and equipment	$	6,207,105	$	6,030,620
Intangible drilling cost	1,830,666		1,550,297
Proven gas properties	1,601,106		1,596,838
Coal properties and surface lands	1,449,526		1,346,151
Unproven gas properties	1,383,921		1,266,017
Gas gathering equipment	1,046,495		1,006,882
Airshafts	746,134		706,388
Mine development	608,630		537,939
Leased coal lands	529,409		529,758
Gas wells and related equipment	623,176		492,367
Coal advance mining royalties	397,015		391,501
Other gas assets	125,635		82,217
Gas advance royalties	22,286		8,229
Total Property Plant and Equipment	16,571,104		15,545,204
Less: Accumulated DD&A	5,940,247		5,354,237
Total Net PP&E	$	10,630,857	$	10,190,967