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Costs Incurred for Property Acquisition, Exploration and Development (Tables)

3 Months Ended

Mar. 31, 2018

Extractive Industries [Abstract]

Costs Incurred for Property Acquisition, Exploration and Development

		Three Months Ended March 31, 2018				Year Ended December 31, 2017
		(in thousands)
Acquisitions:
Acreage purchases		$	19,705			$	62,075
Oil and gas properties			—				18,269
Development			225,033				1,177,526
Exploration:
Drilling			1,855				2,030
Expense			6,968				50,920
Stock-based compensation expense			751				2,742
Gas gathering facilities:
Development			8,590				15,097
Subtotal			262,902				1,328,659
Asset retirement obligations			5,063				20,245
Total costs incurred		$	267,965			$	1,348,904

^(a) Includes costs incurred whether capitalized or expensed.

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- Definition

Tabular disclosure of the aggregate of costs (whether the costs are capitalized or charged to expense at the time they are incurred ) incurred for the year in oil and gas property acquisition, exploration and development activities.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 932
-SubTopic 235
-Section 55
-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=34713648&loc=d3e63042-109448

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 932
-SubTopic 235
-Section 50
-Paragraph 20
-URI http://asc.fasb.org/extlink&oid=68064819&loc=d3e62059-109447

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 932
-SubTopic 235
-Section 50
-Paragraph 19
-URI http://asc.fasb.org/extlink&oid=68064819&loc=d3e62038-109447

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 932
-SubTopic 235
-Section 50
-Paragraph 18
-URI http://asc.fasb.org/extlink&oid=68064819&loc=d3e62014-109447

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 410
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (c)(1)
-URI http://asc.fasb.org/extlink&oid=6392692&loc=d3e7535-110849

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- References

No definition available.

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