XML 43 R31.htm IDEA: XBRL DOCUMENT v3.7.0.1

Property, Plant and Equipment (Tables)

3 Months Ended

Mar. 31, 2017

Property, Plant and Equipment [Abstract]

Property, Plant and Equipment

	March 31, 2017				December 31, 2016
E&P Property, Plant and Equipment
Intangible drilling cost	$	3,465,645			$	3,583,565
Proved gas properties	1,982,134				2,016,916
Unproved gas properties	1,045,437				1,116,282
Gas gathering equipment	1,127,614				1,138,299
Gas wells and related equipment	763,248				791,996
Other gas assets	189,481				190,406
Gas advance royalties	13,186				13,762
Total E&P Property, Plant and Equipment	$	8,586,745			$	8,851,226
Less: Accumulated Depreciation, Depletion and Amortization	3,126,778				3,106,296
Total E&P Property, Plant and Equipment - Net	$	5,459,967			$	5,744,930
PA Mining Operations Property, Plant and Equipment
Coal and other plant and equipment	$	2,318,308			$	2,307,668
Coal properties and surface lands	458,976				458,398
Airshafts	372,656				371,752
Mine development	326,152				326,152
Coal advance mining royalties	16,108				16,224
Leased coal lands	26,556				26,566
Total PA Mining Operations and Other Property, Plant and Equipment	$	3,518,756			$	3,506,760
Less: Accumulated Depreciation, Depletion and Amortization	1,810,108				1,768,712
Total PA Mining Operations and Other Property, Plant and Equipment - Net	$	1,708,648			$	1,738,048
Other Property, Plant and Equipment
Coal and other plant and equipment	531,692				532,919
Coal properties and surface lands	481,037				481,126
Airshafts	10,002				10,003
Mine development	17,988				17,988
Coal advance mining royalties	311,205				310,530
Leased coal lands	60,836				60,836
Total Other Property, Plant and Equipment	$	1,412,760			$	1,413,402
Less: Accumulated Depreciation, Depletion and Amortization	758,456				755,941
Total Other Property, Plant and Equipment - Net	$	654,304			$	657,461
Total Company Property, Plant and Equipment - Continuing Operations	$	13,518,261			$	13,771,388
Less - Total Company Accumulated Depreciation, Depletion and Amortization	5,695,342				5,630,949
Total Company Property, Plant and Equipment - Held for Sale - Net	163,622				—
Total Property, Plant and Equipment of Continuing Operations - Net	$	7,986,541			$	8,140,439

X

- References

No definition available.

+ Details

Name:	us-gaap_PropertyPlantAndEquipmentAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Tabular disclosure of physical assets used in the normal conduct of business and not intended for resale. Includes, but is not limited to, balances by class of assets, depreciation and depletion expense and method used, including composite depreciation, and accumulated deprecation.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.13)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 360
-SubTopic 10
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 02
-Paragraph 13
-Subparagraph b
-Article 5

+ Details

Name:	us-gaap_PropertyPlantAndEquipmentTextBlock
Namespace Prefix:	us-gaap_
Data Type:	nonnum:textBlockItemType
Balance Type:	na
Period Type:	duration