Indebtedness - Guarantees and Debt Covenants - Additional Information (Detail) - Bank Credit Facility	9 Months Ended
	Sep. 30, 2015
Debt Instrument [Line Items]
Debt instrument, Covenant compliance	Our bank credit facility contains negative covenants that limit our ability, among other things, to pay cash dividends, incur additional indebtedness, sell assets, enter into certain hedging contracts, change the nature of our business or operations, merge, consolidate, or make certain investments. In addition, we are required to maintain a ratio of EBITDAX (as defined in the credit agreement) to cash interest expense of equal to or greater than 2.5 and a current ratio (as defined in the credit agreement) of no less than 1.0. In addition, the ratio of the present value of proved reserves (as defined in the credit agreement) to total debt must be equal to or greater than 1.5 until Range has two investment grade ratings. We were in compliance with applicable covenants under the bank credit facility at September 30, 2015. The indentures governing our senior subordinated notes contain various restrictive covenants that are substantially identical to each other and may limit our ability to, among other things, pay cash dividends, incur additional indebtedness, sell assets, enter into transactions with affiliates, or change the nature of our business. At September 30, 2015, we were in compliance with these covenants.
Maximum
Debt Instrument [Line Items]
Ratio of debt to EBITDAX	250.00%
Present Value Of Proved Reserves To Total Debt.	150.00%
Minimum
Debt Instrument [Line Items]
Current ratio	100.00%