v2.4.0.8
Property, Plant and Equipment (Tables)
6 Months Ended
Jun. 30, 2013
Property, Plant and Equipment [Abstract]  
Collaborative Arrangement Disclosure [Text Block]
Shale Play
 
Industry Participation Agreement Partner
 
Industry Participation Agreement Date
 
Drilling Carries Remaining*
Marcellus
 
Noble Energy, Inc.
 
September 30, 2011
 
$
2,034,785

Utica
 
Hess Ohio Developments, LLC
 
October 21, 2011
 
$
279,248

Property, Plant and Equipment
 
June 30,
2013
 
December 31,
2012
Coal and other plant and equipment
$
6,086,734

 
$
6,030,620

Intangible drilling cost
1,721,384

 
1,550,297

Proven gas properties
1,597,626

 
1,596,838

Coal properties and surface lands
1,455,541

 
1,346,151

Unproven gas properties
1,371,532

 
1,266,017

Gas gathering equipment
1,034,927

 
1,006,882

Airshafts
727,674

 
706,388

Mine development
583,494

 
537,939

Leased coal lands
529,700

 
529,758

Gas wells and related equipment
542,284

 
492,367

Coal advance mining royalties
396,034

 
391,501

Other gas assets
125,194

 
82,217

Gas advance royalties
22,127

 
8,229

Total Property Plant and Equipment
16,194,251

 
15,545,204

Less: Accumulated DD&A
5,770,506

 
5,354,237

Total Net PP&E
$
10,423,745

 
$
10,190,967