XML 62 R83.htm IDEA: XBRL DOCUMENT v2.4.1.9
Commitments And Contingencies (Schedule Of Delivery Commitments) (Details)
 12 Months Ended
Dec. 31, 2014
customer
T
Commitments And Contingencies [Abstract]  
Tons, 2015 3,260,000rno_CoalSalesCommitmentsRemainderOfCurrentYear
Tons, 2016 2,121,000rno_CoalSalesCommitmentsYearTwo
Tons, 2017 1,100,000rno_CoalSalesCommitmentsYearThree
Number of customers, 2015 13rno_CoalSalesCommitmentsYearTwoNumberOfCustomers
Number of customers, 2016 5rno_CoalSalesCommitmentsYearThreeNumberOfCustomers
Number of customers, 2017 2rno_CoalSalesCommitmentsYearFourNumberOfCustomers