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Office Closing and Termination Costs - Additional Information (Detail) (USD $)	3 Months Ended	12 Months Ended
	Mar. 31, 2015	Dec. 31, 2014
Disclosure - Office Closing and Termination Costs - Additional Information (Detail) [Line Items]
Termination costs	$ 5,950,000us-gaap_RestructuringCharges	$ 8,371,000us-gaap_RestructuringCharges
Additional accruals for severance costs	275,000us-gaap_SeveranceCosts1
Stock-based compensation	1,287,000	2,999,000
Building lease costs	3,232,000rrc_BuildingLeaseCostsForRestructuring
Additional accruals for severance	1,200,000
Oklahoma City Restructuring
Disclosure - Office Closing and Termination Costs - Additional Information (Detail) [Line Items]
Stock-based compensation	608,000
Other Restructuring
Disclosure - Office Closing and Termination Costs - Additional Information (Detail) [Line Items]
Stock-based compensation	$ 680,000

Amount of expenses associated with exit or disposal activities pursuant to an authorized plan. Excludes expenses related to a discontinued operation or an asset retirement obligation.

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- Definition

Amount of expenses for special or contractual termination benefits provided to current employees involuntarily terminated under a benefit arrangement associated exit or disposal activities pursuant to an authorized plan. Excludes expenses related to one-time termination benefits, a discontinued operation or an asset retirement obligation.

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