Dispositions and Acquisitions - Summary of Final Allocation of Total Purchase Price (Details) - USD ($) $ / shares in Units, $ in Thousands		Sep. 16, 2016	Dec. 31, 2017	Dec. 31, 2016
Natural gas and oil properties:
Goodwill			$ 1,641,197	$ 1,654,292
MRD
Purchase price:
Shares of Range common stock issued to Memorial stockholders		77,042,749
Range common stock price per share at September 15, 2016 (close)		$ 39.37
Total purchase price		$ 3,033,173
Plus fair value of liabilities assumed by Range:
Accounts payable		55,624
Other current liabilities		108,367
Long-term debt		1,204,449
Deferred taxes		547,706
Other long-term liabilities		77,223
Total purchase price plus liabilities assumed		5,026,542
Fair value of Memorial assets:
Cash and equivalents		7,180
Other current assets		99,969
Derivative instruments		152,994
Natural gas and oil properties:
Proved property		1,122,311
Unproved property		1,999,187
Other property and equipment		3,579
Goodwill	[1]	1,641,197
Other		125
Total asset value		$ 5,026,542

[1] Goodwill will not be deductible for income tax purposes.