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Property and Equipment (Tables)

3 Months Ended

Mar. 31, 2012

Property and equipment consisted of the following at March 31, 2012 and December 31, 2011 (in thousands):


	March 31, 2012			December 31, 2011
Equipment	$	4,899,102		$	4,730,925
Oil and natural gas properties		137,548			131,812
Buildings		64,426			64,090
Land		11,467			11,467

		5,112,543			4,938,294
Less accumulated depreciation and depletion		(1,804,280	)		(1,771,028	)

Property and equipment, net	$	3,308,263		$	3,167,266

- Definition

Tabular disclosure of the useful life and salvage value of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale. Examples include land, buildings, machinery and equipment, and other types of furniture and equipment including, but not limited to, office equipment, furniture and fixtures, and computer equipment and software.

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