Property and Equipment (Tables)

3 Months Ended

Mar. 31, 2013

Property, Plant and Equipment [Abstract]

The following table summarizes our property and equipment as of the dates presented:



	As of
	March 31,			December 31,
	2013			2012
Oil and gas properties:
Proved	$	2,362,690		$	2,277,811
Unproved	54,641			60,746
Total oil and gas properties	2,417,331			2,338,557
Other property and equipment	95,221			93,648
Total property and equipment	2,512,552			2,432,205
Accumulated depreciation, depletion and amortization	(752,312		)	(708,846		)
	$	1,760,240		$	1,723,359

- 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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