Dispositions and Acquisitions - Additional Information (Detail)	3 Months Ended				6 Months Ended
	Jun. 30, 2016 USD ($)	Mar. 31, 2016 USD ($)	Jun. 30, 2015 USD ($)	Mar. 31, 2015 USD ($)	Jun. 30, 2016 USD ($)	Jun. 30, 2015 USD ($)	May 13, 2016 USD ($)
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
(Loss) gain on the sale of assets	$ (3,304,000)		$ 2,909,000		$ (4,947,000)	$ 2,734,000
Merger agreement description					On May 15, 2016, Range and Memorial Resource Development Corp. (“Memorial”) entered into an Agreement and Plan of Merger (the “Merger Agreement”) which provides for the Merger of Memorial and Range. Pursuant to the terms of the Merger Agreement, a wholly-owned subsidiary of Range will merge with and into Memorial, with Memorial surviving as a wholly-owned subsidiary of Range (the “Merger”). In order to complete the Merger, among other conditions, Range stockholders must approve the issuance of Range common stock to Memorial stockholders in connection with the Merger and Memorial stockholders must approve and adopt the Merger Agreement and the transactions contemplated by the Merger Agreement.
Merger agreement date					May 15, 2016
Memorial
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Common stock conversion ratio per share	0.375				0.375
Merger consideration payable							$ 3,200,000,000
Estimated ownership percentage at closing of merger	31.00%				31.00%
Range
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Estimated ownership percentage at closing of merger	69.00%				69.00%
Western Oklahoma Properties
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
(Loss) gain on the sale of assets	$ (2,700,000)
Proceeds from sale of oil and gas properties	77,700,000
Northeast Pennsylvania Non-operated Interest
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
(Loss) gain on the sale of assets		$ (2,100,000)
Proceeds from sale of oil and gas properties		111,500,000
Miscellaneous Proved, Unproved Properties and Surface Acreage
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
(Loss) gain on the sale of assets	(640,000)	443,000	2,900,000	$ (175,000)
Proceeds from sale of oil and gas properties	$ 74,000	1,600,000	$ 3,600,000	10,700,000
Mississippi and South Texas properties
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Proceeds from sale of oil and gas properties		$ 1,200,000
West Texas Properties
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Proceeds from sale of oil and gas properties				$ 10,500,000