Major Customers - Additional Information (Detail)	12 Months Ended
Dec. 31, 2012 Customer	Dec. 31, 2011 Customer	Dec. 31, 2010 Customer
Contract Type [Line Items]
Number of customers accounted more than 10% of total oil and gas revenues	2	2	0
Minimum percentage of oil and gas sales revenue for identifying major customer	10.00%	10.00%	10.00%

Number of customers accounted more than ten percent of total oil and gas revenues.

No definition available.

Name:	rrc_NumberOfCustomersAccountedMoreThanTenPercentOfOilAndGasRevenues
Namespace Prefix:	rrc_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration