Segment Information (Tables)

3 Months Ended

Mar. 31, 2013

Schedule of segment information by geographic operating segment

	U.S. Gulf of Mexico			West Africa			Total

	($ in thousands)
*Three months ended March 31, 2013*
Operating costs and expense	$	23,105		$	89,347		$	112,452

Operating income (loss)		(23,105	)		(89,347	)		(112,452	)

Other (income) expense								15,635

Net income (loss)							$	(128,087	)

Additions to Property and Equipment, net(1)	$	54,859		$	(24,902	)	$	29,957

*Three months ended March 31, 2012*
Operating costs and expense	$	24,671		$	13,044		$	37,715

Operating income (loss)		(24,671	)		(13,044	)		(37,715	)

Other (income) expense								(1,184	)

Net income (loss)							$	(36,531	)

Additions to Property and Equipment, net(1)	$	22,346		$	56,887		$	79,233

(1): These amounts are net of accumulated allowance for impairment on oil and gas properties and accumulated depreciation and amortization on other property and equipment.

- Definition

Tabular disclosure of the profit or loss and total assets for each reportable segment. An entity discloses certain information on each reportable segment if the amounts (a) are included in the measure of segment profit or loss reviewed by the chief operating decision maker or (b) are otherwise regularly provided to the chief operating decision maker, even if not included in that measure of segment profit or loss.

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