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Office Closing and Termination Costs - Summary of Termination Costs (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended	12 Months Ended
	Mar. 31, 2015	Dec. 31, 2014
Statement Of Financial Position [Abstract]
Termination costs	$ 1,431us-gaap_RestructuringCosts	$ 5,372us-gaap_RestructuringCosts
Building lease	3,232rrc_BuildingLeaseCostsForRestructuring
Stock-based compensation expense	1,287	2,999
Total termination costs	$ 5,950us-gaap_RestructuringCharges	$ 8,371us-gaap_RestructuringCharges

- Definition

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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