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Acquisitions (Tables)

12 Months Ended

Dec. 31, 2013

Business Combinations [Abstract]

Purchase Price Allocation

	Year Ended December 31, 2013
	West Williston				East Nesson
Consideration given to the sellers:	(In thousands)
Cash	$	1,496,369			$	55,339
Forgiveness of debt	—				1,896
Total consideration	1,496,369				57,235
Recognized amounts of identifiable assets acquired and liabilities assumed:
Assets acquired:
Proved developed properties	535,477				32,511
Proved undeveloped properties	165,907				1,807
Unproved lease acquisition costs	787,589				23,369
Other property and equipment	13,157				—
Inventory	3,181				148
Total assets acquired	1,505,311				57,835
Liabilities assumed:
Asset retirement obligations	6,598				307
Revenues payable	2,344				293
Total liabilities assumed	8,942				600
Total identifiable net assets	$	1,496,369			$	57,235

Business Acquisition, Pro Forma Information [Table Text Block]

	Year Ended December 31,
	2013				2012
	(In thousands)
	Unaudited
Revenues	$	1,297,545			$	831,575
Net income	231,217				136,004

X

- Definition

Tabular disclosure of pro forma results of operations for a material business acquisition or series of individually immaterial business acquisitions that are material in the aggregate.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 805

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (h)(2)-(3)

-URI http://asc.fasb.org/extlink&oid=25497992&loc=d3e1392-128463

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X

- Definition

Tabular disclosure of the amounts recognized as of the acquisition date for each major class of assets acquired and liabilities assumed. May include but not limited to the following: (a) acquired receivables; (b) contingencies recognized at the acquisition date; and (c) the fair value of noncontrolling interests in the acquiree.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 805

-SubTopic 20

-Section 50

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=6910749&loc=d3e4845-128472

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