Subsequent Events	3 Months Ended
Mar. 31, 2013
Subsequent Events [Abstract]
Subsequent Events	19. SUBSEQUENT EVENTS On April 8, 2013, the Partnership announced that it has closed on an agreement with a third party to sell the 20% royalty interest on its owned Utica Shale property for approximately $10.5 million. Rhino’s owned Utica Shale property was leased to a third party in March 2012 and the lease agreement stipulated that Rhino retained a 20% royalty based upon the gross proceeds received from the sale of oil and/or natural gas recovered from the leased property. On April 19, 2013, the Partnership entered into an amendment of its amended and restated senior secured credit facility with PNC Bank, N.A., as administrative agent, and a group of lenders, which are parties thereto. The amendment provided for an increase in the maximum allowed investments in coal-related entities outside of the Partnership (i.e. joint ventures) under the amended and restated senior secured credit facility from $25 million to $40 million. The amendment also altered the maximum leverage ratio allowed under the amended and restated senior secured credit facility and also altered the pricing grid to include applicable interest rates for borrowings, letter of credit fees and commitment fees on unused borrowings based upon the new maximum leverage ratio. The amendment increases the maximum leverage ratio of the amended and restated senior secured credit facility to 3.75 from April 1, 2013 through March 31, 2015, then steps the maximum leverage ratio down to its previous level of 3.0 by December 31, 2015. All other terms of the amended and restated senior secured credit facility were not affected by the amendment. On April 22, 2013, the Partnership announced a cash distribution of $0.445 per common unit, or $1.78 per unit on an annualized basis. This distribution will be paid on May 15, 2013 to all common unit holders of record as of the close of business on May 2, 2013. No distributions will be paid on the subordinated units.

19. SUBSEQUENT EVENTS

On April 8, 2013, the Partnership announced that it has closed on an agreement with a third party to sell the 20% royalty interest on its owned Utica Shale property for approximately $10.5 million. Rhino’s owned Utica Shale property was leased to a third party in March 2012 and the lease agreement stipulated that Rhino retained a 20% royalty based upon the gross proceeds received from the sale of oil and/or natural gas recovered from the leased property.

On April 19, 2013, the Partnership entered into an amendment of its amended and restated senior secured credit facility with PNC Bank, N.A., as administrative agent, and a group of lenders, which are parties thereto. The amendment provided for an increase in the maximum allowed investments in coal-related entities outside of the Partnership (i.e. joint ventures) under the amended and restated senior secured credit facility from $25 million to $40 million. The amendment also altered the maximum leverage ratio allowed under the amended and restated senior secured credit facility and also altered the pricing grid to include applicable interest rates for borrowings, letter of credit fees and commitment fees on unused borrowings based upon the new maximum leverage ratio. The amendment increases the maximum leverage ratio of the amended and restated senior secured credit facility to 3.75 from April 1, 2013 through March 31, 2015, then steps the maximum leverage ratio down to its previous level of 3.0 by December 31, 2015. All other terms of the amended and restated senior secured credit facility were not affected by the amendment.

On April 22, 2013, the Partnership announced a cash distribution of $0.445 per common unit, or $1.78 per unit on an annualized basis. This distribution will be paid on May 15, 2013 to all common unit holders of record as of the close of business on May 2, 2013. No distributions will be paid on the subordinated units.