Property, Plant and Equipment (Tables)

12 Months Ended

Dec. 31, 2013

Property, Plant and Equipment [Abstract]

Property, Plant and Equipment

	December 31,
	2013		2012
Coal & Other Plant and Equipment	$	3,681,051	$	3,414,940
Intangible Drilling Cost	1,937,336		1,550,297
Proven Properties	1,670,404		1,596,838
Unproven Properties	1,463,406		1,266,017
Coal Properties and Surface Lands	1,404,056		1,164,107
Gathering Equipment	1,058,008		1,006,882
Wells and Related Equipment	688,548		492,364
Airshafts	397,466		366,054
Leased Coal Lands	393,372		529,758
Coal Advance Mining Royalties	381,348		381,343
Mine Development	354,607		262,511
Other Gas Assets	126,239		82,217
Gas Advance Royalties	22,668		8,229
Total Property, Plant and Equipment	13,578,509		12,121,557
Less Accumulated Depreciation, Depletion and Amortization	4,136,247		3,613,499
Total Net Property, Plant and Equipment	$	9,442,262	$	8,508,058

Schedule of Amortization Expense Per Unit of Production [Table Text Block]

	December 31,
	2013		2012
Unproven gas properties	$	1,487,166	$	1,266,017
Coal properties	273,242		317,676
Mine Development	238,356		145,940
Leased coal lands	99,506		118,697
Coal advance mining royalties	48,043		55,749
Airshafts	38,794		21,866
Gas advance royalties	22,668		8,229
Total	$	2,207,775	$	1,934,174

Collaborative Arrangement Disclosure [Text Block]

	Industry	Industry
	Participation	Participation	Drilling
Shale	Agreement	Agreement	Carries
Play	Partner	Date	Remaining
Marcellus	Noble	September 30, 2011	$	1,873,785
Utica	Hess	October 21, 2011	$	230,353