PROPERTIES AND EQUIPMENT, NET (Tables)

3 Months Ended

Mar. 31, 2013

Components of net property, plant, and equipment

	March 31,			December 31,
(In thousands)	2013			2012

Proved oil and gas properties	$	5,969,544		$	5,724,940
Unproved oil and gas properties	463,455			467,483
Gathering and pipeline systems	239,791			239,656
Land, building and other equipment	88,484			86,137
	6,761,274			6,518,216
Accumulated depreciation, depletion and amortization	(2,348,502		)	(2,207,239		)
	$	4,412,772		$	4,310,977

- 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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