2.4.0.811301 - Disclosure - Commitments And Contingenciestruefalsefalse1false falsefalseDuration_1_1_2013_To_6_30_2013http://www.sec.gov/CIK0001490630duration2013-01-01T00:00:002013-06-30T00:00:001true 1us-gaap_CommitmentsAndContingenciesDisclosureAbstractus-gaap_truenadurationfalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalsexbrli:stringItemTypestringfalse0Commitments And Contingencies [Abstract]2false 2us-gaap_CommitmentsAndContingenciesDisclosureTextBlockus-gaap_truenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse00<div> <div style="margin-left:0pt;margin-right:0pt;"> 13. COMMITMENTS AND CONTINGENCIES  Coal Sales Contracts and Contingencies—As of June  30, 2013, the Partnership had commitments under sales contracts to deliver annually scheduled base quantities of approximately  1.8 million, 2.5 million, 1.6 million, 1.1 million and 1.1 million tons of coal to 18 customers in 2013, 8 customers in 2014, 4 customers in 2015, 2 customers in 2016, and 2 customers in 2017, respectively. Some of the contracts have sales price adjustment provisions, subject to certain limitations and adjustments, based on a variety of factors and indices.    Purchase Commitments—As of June 30, 2013, the Partnership had approximately  0.5 million gallons remaining on a commitment to purchase diesel fuel at fixed prices through December 2013 for approximately $1.6 million.  Purchased Coal Expenses—The Partnership incurs purchased coal expense from time to time related to coal purchase contracts. In addition, the Partnership incurs expense from time to time related to coal purchased on the over-the-counter market (“OTC”). Purchased coal expense from coal purchase contracts and expense from OTC purchases for the three and six months ended June  30, 2013 and 2012  were as follows:   <div style="width:100%"><table cellpadding="0" cellspacing="0" align="center" style="border-collapse:collapse;width: 100.00%;margin-left:0pt;"> <tr> <td valign="bottom" style="width:26.02%;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt none #D9D9D9 ;border-right:1pt none #D9D9D9 ;background-color: #auto;height:1pt;padding:0pt;">   </td> <td valign="bottom" style="width:03.26%;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt none #D9D9D9 ;border-right:1pt none #D9D9D9 ;background-color: #auto;height:1pt;padding:0pt;">   </td> <td valign="bottom" style="width:15.24%;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt none #D9D9D9 ;border-right:1pt none #D9D9D9 ;background-color: #auto;height:1pt;padding:0pt;">   </td> <td valign="bottom" style="width:03.26%;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt none #D9D9D9 ;border-right:1pt none #D9D9D9 ;background-color: #auto;height:1pt;padding:0pt;">   </td> <td valign="bottom" style="width:15.24%;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt none #D9D9D9 ;border-right:1pt none #D9D9D9 ;background-color: #auto;height:1pt;padding:0pt;">   </td> <td valign="bottom" style="width:03.26%;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt none #D9D9D9 ;border-right:1pt none #D9D9D9 ;background-color: #auto;height:1pt;padding:0pt;">   </td> <td valign="bottom" style="width:15.24%;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt none #D9D9D9 ;border-right:1pt none #D9D9D9 ;background-color: #auto;height:1pt;padding:0pt;">   </td> <td valign="bottom" style="width:03.26%;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt none #D9D9D9 ;border-right:1pt none #D9D9D9 ;background-color: #auto;height:1pt;padding:0pt;">   </td> <td valign="bottom" style="width:15.22%;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt none #D9D9D9 ;border-right:1pt none #D9D9D9 ;background-color: #auto;height:1pt;padding:0pt;">   </td> </tr> <tr> <td valign="bottom" style="width:26.02%;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt none #D9D9D9 ;border-right:1pt none #D9D9D9 ;background-color: #auto;height:15pt;padding:0pt;">   </td> <td valign="bottom" style="width:03.26%;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt none #D9D9D9 ;border-right:1pt none #D9D9D9 ;background-color: #auto;height:15pt;padding:0pt;">   </td> <td colspan="3" valign="bottom" style="width:00.02%;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #auto;height:15pt;padding:0pt;"> Three months ended June 30, </td> <td valign="bottom" style="width:03.26%;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt none #D9D9D9 ;border-right:1pt none #D9D9D9 ;background-color: #auto;height:15pt;padding:0pt;">   </td> <td colspan="3" valign="bottom" style="width:00.02%;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #auto;height:15pt;padding:0pt;"> Six months ended June 30, </td> </tr> <tr> <td valign="bottom" style="width:26.02%;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt none #D9D9D9 ;border-right:1pt none #D9D9D9 ;background-color: #auto;height:15pt;padding:0pt;">   </td> <td valign="bottom" style="width:03.26%;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt none #D9D9D9 ;border-right:1pt none #D9D9D9 ;background-color: #auto;height:15pt;padding:0pt;">   </td> <td valign="bottom" style="width:15.24%;border-top:1pt solid #000000 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #auto;height:15pt;padding:0pt;"> 2013 </td> <td valign="bottom" style="width:03.26%;border-top:1pt solid #000000 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt none #D9D9D9 ;border-right:1pt none #D9D9D9 ;background-color: #auto;height:15pt;padding:0pt;">   </td> <td valign="bottom" style="width:15.24%;border-top:1pt solid #000000 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #auto;height:15pt;padding:0pt;"> 2012 </td> <td valign="bottom" style="width:03.26%;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt none #D9D9D9 ;border-right:1pt none #D9D9D9 ;background-color: #auto;height:15pt;padding:0pt;">   </td> <td valign="bottom" style="width:15.24%;border-top:1pt solid #000000 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #auto;height:15pt;padding:0pt;"> 2013 </td> <td valign="bottom" style="width:03.26%;border-top:1pt solid #000000 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt none #D9D9D9 ;border-right:1pt none #D9D9D9 ;background-color: #auto;height:15pt;padding:0pt;">   </td> <td valign="bottom" style="width:15.22%;border-top:1pt solid #000000 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #auto;height:15pt;padding:0pt;"> 2012 </td> </tr> <tr> <td valign="bottom" style="width:26.02%;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt none #D9D9D9 ;border-right:1pt none #D9D9D9 ;background-color: #auto;height:15pt;padding:0pt;">   </td> <td valign="bottom" style="width:03.26%;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt none #D9D9D9 ;border-right:1pt none #D9D9D9 ;background-color: #auto;height:15pt;padding:0pt;">   </td> <td colspan="7" valign="bottom" style="width:00.02%;border-top:1pt solid #000000 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt none #D9D9D9 ;border-right:1pt none #D9D9D9 ;background-color: #auto;height:15pt;padding:0pt;"> (in thousands) </td> </tr> <tr> <td valign="bottom" style="width:26.02%;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt none #D9D9D9 ;border-right:1pt none #D9D9D9 ;background-color: #auto;height:15pt;padding:0pt;"> Purchased coal expense </td> <td valign="bottom" style="width:03.26%;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt none #D9D9D9 ;border-right:1pt none #D9D9D9 ;background-color: #auto;height:15pt;padding:0pt;">   </td> <td valign="bottom" style="width:15.24%;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt none #D9D9D9 ;border-right:1pt none #D9D9D9 ;background-color: #auto;height:15pt;padding:0pt;"> $              905  </td> <td valign="bottom" style="width:03.26%;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt none #D9D9D9 ;border-right:1pt none #D9D9D9 ;background-color: #auto;height:15pt;padding:0pt;">   </td> <td valign="bottom" style="width:15.24%;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt none #D9D9D9 ;border-right:1pt none #D9D9D9 ;background-color: #auto;height:15pt;padding:0pt;"> $           5,049  </td> <td valign="bottom" style="width:03.26%;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt none #D9D9D9 ;border-right:1pt none #D9D9D9 ;background-color: #auto;height:15pt;padding:0pt;">   </td> <td valign="bottom" style="width:15.24%;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt none #D9D9D9 ;border-right:1pt none #D9D9D9 ;background-color: #auto;height:15pt;padding:0pt;"> $           1,877  </td> <td valign="bottom" style="width:03.26%;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt none #D9D9D9 ;border-right:1pt none #D9D9D9 ;background-color: #auto;height:15pt;padding:0pt;">   </td> <td valign="bottom" style="width:15.22%;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt none #D9D9D9 ;border-right:1pt none #D9D9D9 ;background-color: #auto;height:15pt;padding:0pt;"> $         10,162  </td> </tr> <tr> <td valign="bottom" style="width:26.02%;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt none #D9D9D9 ;border-right:1pt none #D9D9D9 ;background-color: #auto;height:15pt;padding:0pt;"> OTC expense </td> <td valign="bottom" style="width:03.26%;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt none #D9D9D9 ;border-right:1pt none #D9D9D9 ;background-color: #auto;height:15pt;padding:0pt;">   </td> <td valign="bottom" style="width:15.24%;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt none #D9D9D9 ;border-right:1pt none #D9D9D9 ;background-color: #auto;height:15pt;padding:0pt;"> $              666  </td> <td valign="bottom" style="width:03.26%;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt none #D9D9D9 ;border-right:1pt none #D9D9D9 ;background-color: #auto;height:15pt;padding:0pt;">   </td> <td valign="bottom" style="width:15.24%;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt none #D9D9D9 ;border-right:1pt none #D9D9D9 ;background-color: #auto;height:15pt;padding:0pt;"> $                  -  </td> <td valign="bottom" style="width:03.26%;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt none #D9D9D9 ;border-right:1pt none #D9D9D9 ;background-color: #auto;height:15pt;padding:0pt;">   </td> <td valign="bottom" style="width:15.24%;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt none #D9D9D9 ;border-right:1pt none #D9D9D9 ;background-color: #auto;height:15pt;padding:0pt;"> $              666  </td> <td valign="bottom" style="width:03.26%;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt none #D9D9D9 ;border-right:1pt none #D9D9D9 ;background-color: #auto;height:15pt;padding:0pt;">   </td> <td valign="bottom" style="width:15.22%;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt none #D9D9D9 ;border-right:1pt none #D9D9D9 ;background-color: #auto;height:15pt;padding:0pt;"> $                  -  </td> </tr> </table></div>   Leases—The Partnership leases various mining, transportation and other equipment under operating leases. The Partnership also leases coal reserves under agreements that call for royalties to be paid as the coal is mined. Lease and royalty expense for the three and six months ended June  30, 2013 and 2012 was as follows:     <div style="width:100%"><table cellpadding="0" cellspacing="0" align="center" style="border-collapse:collapse;width: 100.00%;margin-left:0pt;"> <tr> <td valign="bottom" style="width:26.02%;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt none #D9D9D9 ;border-right:1pt none #D9D9D9 ;background-color: #auto;height:1pt;padding:0pt;">   </td> <td valign="bottom" style="width:03.26%;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt none #D9D9D9 ;border-right:1pt none #D9D9D9 ;background-color: #auto;height:1pt;padding:0pt;">   </td> <td valign="bottom" style="width:15.24%;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt none #D9D9D9 ;border-right:1pt none #D9D9D9 ;background-color: #auto;height:1pt;padding:0pt;">   </td> <td valign="bottom" style="width:03.26%;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt none #D9D9D9 ;border-right:1pt none #D9D9D9 ;background-color: #auto;height:1pt;padding:0pt;">   </td> <td valign="bottom" style="width:15.24%;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt none #D9D9D9 ;border-right:1pt none #D9D9D9 ;background-color: #auto;height:1pt;padding:0pt;">   </td> <td valign="bottom" style="width:03.26%;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt none #D9D9D9 ;border-right:1pt none #D9D9D9 ;background-color: #auto;height:1pt;padding:0pt;">   </td> <td valign="bottom" style="width:15.24%;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt none #D9D9D9 ;border-right:1pt none #D9D9D9 ;background-color: #auto;height:1pt;padding:0pt;">   </td> <td valign="bottom" style="width:03.26%;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt none #D9D9D9 ;border-right:1pt none #D9D9D9 ;background-color: #auto;height:1pt;padding:0pt;">   </td> <td valign="bottom" style="width:15.22%;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt none #D9D9D9 ;border-right:1pt none #D9D9D9 ;background-color: #auto;height:1pt;padding:0pt;">   </td> </tr> <tr> <td valign="bottom" style="width:26.02%;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt none #D9D9D9 ;border-right:1pt none #D9D9D9 ;background-color: #auto;height:15pt;padding:0pt;">   </td> <td valign="bottom" style="width:03.26%;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt none #D9D9D9 ;border-right:1pt none #D9D9D9 ;background-color: #auto;height:15pt;padding:0pt;">   </td> <td colspan="3" valign="bottom" style="width:00.02%;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #auto;height:15pt;padding:0pt;"> Three months ended June 30, </td> <td valign="bottom" style="width:03.26%;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt none #D9D9D9 ;border-right:1pt none #D9D9D9 ;background-color: #auto;height:15pt;padding:0pt;">   </td> <td colspan="3" valign="bottom" style="width:00.02%;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #auto;height:15pt;padding:0pt;"> Six months ended June 30, </td> </tr> <tr> <td valign="bottom" style="width:26.02%;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt none #D9D9D9 ;border-right:1pt none #D9D9D9 ;background-color: #auto;height:15pt;padding:0pt;">   </td> <td valign="bottom" style="width:03.26%;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt none #D9D9D9 ;border-right:1pt none #D9D9D9 ;background-color: #auto;height:15pt;padding:0pt;">   </td> <td valign="bottom" style="width:15.24%;border-top:1pt solid #000000 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #auto;height:15pt;padding:0pt;"> 2013 </td> <td valign="bottom" style="width:03.26%;border-top:1pt solid #000000 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt none #D9D9D9 ;border-right:1pt none #D9D9D9 ;background-color: #auto;height:15pt;padding:0pt;">   </td> <td valign="bottom" style="width:15.24%;border-top:1pt solid #000000 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #auto;height:15pt;padding:0pt;"> 2012 </td> <td valign="bottom" style="width:03.26%;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt none #D9D9D9 ;border-right:1pt none #D9D9D9 ;background-color: #auto;height:15pt;padding:0pt;">   </td> <td valign="bottom" style="width:15.24%;border-top:1pt solid #000000 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #auto;height:15pt;padding:0pt;"> 2013 </td> <td valign="bottom" style="width:03.26%;border-top:1pt solid #000000 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt none #D9D9D9 ;border-right:1pt none #D9D9D9 ;background-color: #auto;height:15pt;padding:0pt;">   </td> <td valign="bottom" style="width:15.22%;border-top:1pt solid #000000 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #auto;height:15pt;padding:0pt;"> 2012 </td> </tr> <tr> <td valign="bottom" style="width:26.02%;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt none #D9D9D9 ;border-right:1pt none #D9D9D9 ;background-color: #auto;height:15pt;padding:0pt;">   </td> <td valign="bottom" style="width:03.26%;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt none #D9D9D9 ;border-right:1pt none #D9D9D9 ;background-color: #auto;height:15pt;padding:0pt;">   </td> <td colspan="7" valign="bottom" style="width:00.02%;border-top:1pt solid #000000 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt none #D9D9D9 ;border-right:1pt none #D9D9D9 ;background-color: #auto;height:15pt;padding:0pt;"> (in thousands) </td> </tr> <tr> <td valign="bottom" style="width:26.02%;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt none #D9D9D9 ;border-right:1pt none #D9D9D9 ;background-color: #auto;height:15pt;padding:0pt;"> Lease expense </td> <td valign="bottom" style="width:03.26%;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt none #D9D9D9 ;border-right:1pt none #D9D9D9 ;background-color: #auto;height:15pt;padding:0pt;">   </td> <td valign="bottom" style="width:15.24%;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt none #D9D9D9 ;border-right:1pt none #D9D9D9 ;background-color: #auto;height:15pt;padding:0pt;"> $              807  </td> <td valign="bottom" style="width:03.26%;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt none #D9D9D9 ;border-right:1pt none #D9D9D9 ;background-color: #auto;height:15pt;padding:0pt;">   </td> <td valign="bottom" style="width:15.24%;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt none #D9D9D9 ;border-right:1pt none #D9D9D9 ;background-color: #auto;height:15pt;padding:0pt;"> $              568  </td> <td valign="bottom" style="width:03.26%;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt none #D9D9D9 ;border-right:1pt none #D9D9D9 ;background-color: #auto;height:15pt;padding:0pt;">   </td> <td valign="bottom" style="width:15.24%;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt none #D9D9D9 ;border-right:1pt none #D9D9D9 ;background-color: #auto;height:15pt;padding:0pt;"> $           1,673  </td> <td valign="bottom" style="width:03.26%;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt none #D9D9D9 ;border-right:1pt none #D9D9D9 ;background-color: #auto;height:15pt;padding:0pt;">   </td> <td valign="bottom" style="width:15.22%;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt none #D9D9D9 ;border-right:1pt none #D9D9D9 ;background-color: #auto;height:15pt;padding:0pt;"> $           1,263  </td> </tr> <tr> <td valign="bottom" style="width:26.02%;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt none #D9D9D9 ;border-right:1pt none #D9D9D9 ;background-color: #auto;height:15pt;padding:0pt;"> Royalty expense </td> <td valign="bottom" style="width:03.26%;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt none #D9D9D9 ;border-right:1pt none #D9D9D9 ;background-color: #auto;height:15pt;padding:0pt;">   </td> <td valign="bottom" style="width:15.24%;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt none #D9D9D9 ;border-right:1pt none #D9D9D9 ;background-color: #auto;height:15pt;padding:0pt;"> $           3,143  </td> <td valign="bottom" style="width:03.26%;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt none #D9D9D9 ;border-right:1pt none #D9D9D9 ;background-color: #auto;height:15pt;padding:0pt;">   </td> <td valign="bottom" style="width:15.24%;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt none #D9D9D9 ;border-right:1pt none #D9D9D9 ;background-color: #auto;height:15pt;padding:0pt;"> $           2,801  </td> <td valign="bottom" style="width:03.26%;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt none #D9D9D9 ;border-right:1pt none #D9D9D9 ;background-color: #auto;height:15pt;padding:0pt;">   </td> <td valign="bottom" style="width:15.24%;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt none #D9D9D9 ;border-right:1pt none #D9D9D9 ;background-color: #auto;height:15pt;padding:0pt;"> $           6,051  </td> <td valign="bottom" style="width:03.26%;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt none #D9D9D9 ;border-right:1pt none #D9D9D9 ;background-color: #auto;height:15pt;padding:0pt;">   </td> <td valign="bottom" style="width:15.22%;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt none #D9D9D9 ;border-right:1pt none #D9D9D9 ;background-color: #auto;height:15pt;padding:0pt;"> $           7,087  </td> </tr> </table></div>   Joint Ventures—Pursuant to the Rhino Eastern joint venture agreement with Patriot, the Partnership is required to contribute additional capital to assist in funding the development and operations of the Rhino Eastern joint venture. During the six months ended June 30, 2013, the Partnership made capital contributions of approximately $0.4 million to the Rhino Eastern joint venture. The Partnership may be required to contribute additional capital to the Rhino Eastern joint venture in subsequent periods.  The Partnership may contribute additional capital to the Timber Wolf joint venture that was formed in the first quarter of 2012.  The Partnership made an initial capital contribution of approximately $0.1 million during the year ended December 31, 2012 based upon its proportionate ownership interest.   The Partnership may contribute additional capital to the Muskie Proppant joint venture that was formed in the fourth quarter of 2012. The Partnership made an initial capital contribution of approximately $2.0 million during the fourth quarter of 2012 and an additional capital contribution of approximately $0.4 million during the six months ended June 30, 2013, each based upon its proportionate ownership interest. </div> </div>falsefalsefalsenonnum:textBlockItemTypenaThe entire disclosure for commitments and contingencies.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name FASB Interpretation (FIN) -Number 14 -Paragraph 3 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. 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This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. false0Commitments And ContingenciesfalseCommitments And ContingenciesUnKnownUnKnownUnKnownUnKnowntruefalsefalseSheethttp://www.rhinolp.com/role/DisclosureCommitmentsAndContingencies12