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Impairments (Tables)

12 Months Ended

Dec. 31, 2011

The following table summarizes impairment charges recorded during the periods presented:

	Year Ended December 31,
	2011		2010		2009
Oil and gas properties	$	104,688	$	43,067	$	102,332
Other - tubular inventory and well materials		-		2,892		4,083
	$	104,688	$	45,959	$	106,415

- Definition

Tabular disclosure for impairment of long-lived assets held and used by an entity which includes a description of the impaired long-lived asset and facts and circumstances leading to the impairment, aggregate amount of the impairment loss and where the loss is located in the income statement, method(s) for determining fair value, and the segment in which the impaired long-lived asset is reported.

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