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Property, Plant and Equipment (Tables)

12 Months Ended

Dec. 31, 2013

Property, Plant and Equipment [Abstract]

Property, Plant and Equipment

Property, plant and equipment consists of the following (in thousands):

	December 31,
	2013				2012
Oil and natural gas properties
Proved(1)	$	10,972,816			$	12,262,921
Unproved	531,606				865,863
Total oil and natural gas properties	11,504,422				13,128,784
Less accumulated depreciation, depletion and impairment	(5,762,969		)		(5,231,182		)
Net oil and natural gas properties capitalized costs	5,741,453				7,897,602
Land	18,423				17,927
Non-oil and natural gas equipment(2)	600,603				643,370
Buildings and structures(3)	233,405				205,349
Total	852,431				866,646
Less accumulated depreciation and amortization	(286,209		)		(284,271		)
Other property, plant and equipment, net	566,222				582,375
Total property, plant and equipment, net	$	6,307,675			$	8,479,977

____________________

(1) Includes cumulative capitalized interest of approximately $23.4 million and $11.7 million at December 31, 2013 and 2012, respectively.

(2) Includes cumulative capitalized interest of approximately $4.3 million at both December 31, 2013 and 2012.

(3) Includes cumulative capitalized interest of approximately $12.0 million and $7.1 million at December 31, 2013 and 2012, respectively.

Capitalized Costs of Unproved Properties Excluded from Amortization

The following table summarizes the costs, by year incurred, related to unproved properties and pipe inventory, which were excluded from oil and natural gas properties subject to amortization at December 31, 2013 (in thousands):

					Year Cost Incurred
	Total				2013				2012				2011				2010 and Prior
Property acquisition	$	515,849			$	114,252			$	291,999			$	34,164			$	75,434
Exploration(1)	61,327				48,764				5,479				3,598				3,486
Total costs incurred	$	577,176			$	163,016			$	297,478			$	37,762			$	78,920

____________________

(1) Includes $45.6 million of pipe inventory costs incurred ($42.6 million in 2013, $2.8 million in 2012 and $0.2 million in 2010 and prior years).

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- 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 360

-SubTopic 10

-Section 50

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229



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-Name Accounting Standards Codification

-Topic 210

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-Section S99

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-Subparagraph (SX 210.5-02.13)

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Tabular disclosure of the capitalized costs of unproved properties and major development projects that are excluded from capitalized costs being amortized. This includes the total costs excluded and, at a minimum, these categories of costs: acquisition costs, exploration costs, development costs in the case of significant development projects, and capitalized interest.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 932

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.4-10.(c)(7)(ii))

-URI http://asc.fasb.org/extlink&oid=27015464&loc=d3e511914-122862



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