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Stock-Based Compensation Plans - Additional Information 3 (Detail) (USD $)
In Thousands, except Share data in Millions, unless otherwise specified
 3 Months Ended
Mar. 31, 2015
Mar. 31, 2014
Dec. 31, 2014
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]      
Deferred compensation plan vesting period 3 years    
Deferred compensation plan $ 5,624us-gaap_DeferredCompensationArrangementWithIndividualCompensationExpense $ 2,035us-gaap_DeferredCompensationArrangementWithIndividualCompensationExpense  
Shares held in rabbi trust total 2.8rrc_SharesHeldInRabbiTrust   2.8rrc_SharesHeldInRabbiTrust
Vested shares held in rabbi trust 2.5rrc_VestedSharesHeldInRabbiTrust   2.5rrc_VestedSharesHeldInRabbiTrust