Acquisitions

6 Months Ended

Jun. 30, 2012

Acquisitions [Abstract]

Acquisitions

Note 6 – Acquisitions

On June 18, 2012, we completed the acquisition of Anadarko U.S. Offshore Corporation’s (“APC”) 25% working interest in the five block deep water Pompano field in Mississippi Canyon, an approximate 14% working interest in Mississippi Canyon Block 29 and a 10% working interest in certain aliquots of Mississippi Canyon Block 72. The acquisition was accounted for according to the guidance provided in ASC 805, Business Combinations, which requires application of the acquisition method. This methodology requires the recordation of net assets acquired and consideration transferred at fair value (see Note 7 – Fair Value Measurements). Differences between the net fair value of assets acquired and consideration transferred are recorded as goodwill or a bargain purchase gain. The following represents the allocation of the recorded value of net assets acquired in the transaction. Consideration transferred in the transaction was $26.4 million in cash, resulting in no goodwill or bargain purchase gain.

	(in millions)
Proved oil and gas properties	$	39.2
Unevaluated oil and gas properties		1.6
Asset retirement obligations		(14.4	)
Total fair value of net assets	$	26.4

On December 28, 2011, we completed the acquisition of BP Exploration & Production Inc.’s (“BP”) 75% operated working interest in the five block deep water Pompano field in Mississippi Canyon, a 51% operated working interest in the adjacent Mississippi Canyon Block 29, a 50% non-operated working interest in the Mica field that ties back to the Pompano platform and a 75% interest in 23 deep water exploration leases located in the vicinity of the Pompano field. The following unaudited summary pro forma combined statement of operations data of Stone for the three and six-month periods ended June 30, 2011 has been prepared to give effect to the acquisition of the deep water assets from BP as if it had occurred on January 1, 2010. The pro forma financial information is not necessarily indicative of the results that might have occurred had the transaction taken place on January 1, 2010 and is not intended to be a projection of future results. Future results may vary significantly from the results reflected in the following pro forma financial information because of normal production declines, changes in commodity prices, future acquisitions and divestitures, future development and exploration activities, and other factors.

	Three Months Ended June  30, 2011 (unaudited)		Six Months Ended June 30, 2011 (unaudited)
	(in millions, except per share amounts)
Revenues	$	279.4	$	515.0
Income from operations		117.2		204.9
Net income		72.1		125.5
Basic earnings per share	$	1.47	$	2.56
Diluted earnings per share	$	1.47	$	2.56