2.4.0.83090 - Disclosure - WORKERS' COMPENSATION AND PNEUMOCONIOSIS (Tables)truefalsefalse1false falsefalseD2013Q2YTDhttp://www.sec.gov/CIK0001344980duration2013-01-01T00:00:002013-06-30T00:00:001true 3us-gaap_DefinedBenefitPlanDisclosureLineItemsus-gaap_truenadurationfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1falsefalsefalse00falsefalsefalsexbrli:stringItemTypestringfalse0Accrued Workers Compensation And Pneumoconiosis Benefits2false 4ahgp_ScheduleOfReconciliationOfChangesInWorkersCompensationLiabilityTableTextBlockahgp_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse00<div style="font-size:10.0pt;font-family:Times New Roman;FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt;"> The changes in the workers’ compensation liability (including current and long-term liability balances) for each of the periods presented were as follows (in thousands): <table style="text-align:left;TEXT-ALIGN: left; WIDTH: 949px; BORDER-COLLAPSE: collapse;" border="0" cellspacing="0" cellpadding="0" width="949"> <tr style="padding:0;PADDING-BOTTOM: 0px; PADDING-LEFT: 0px; PADDING-RIGHT: 0px; PADDING-TOP: 0px;"> <td style="PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 49%; PADDING-RIGHT: 0in; PADDING-TOP: 0in;" valign="bottom" width="49%">  </td> <td style="PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 2.5%; PADDING-RIGHT: 0in; PADDING-TOP: 0in;" valign="bottom" width="2%">  </td> <td style="BORDER-BOTTOM: windowtext 1pt solid; BORDER-LEFT: medium none; PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 22.52%; PADDING-RIGHT: 0in; BORDER-TOP: medium none; BORDER-RIGHT: medium none; PADDING-TOP: 0in;" valign="bottom" width="22%" colspan="5"> Three Months Ended June 30,</td> <td style="PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 2.5%; PADDING-RIGHT: 0in; PADDING-TOP: 0in;" valign="bottom" width="2%">  </td> <td style="BORDER-BOTTOM: windowtext 1pt solid; BORDER-LEFT: medium none; PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 22.5%; PADDING-RIGHT: 0in; BORDER-TOP: medium none; BORDER-RIGHT: medium none; PADDING-TOP: 0in;" valign="bottom" width="22%" colspan="5"> Six Months Ended June 30,</td> <td style="PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 0.98%; PADDING-RIGHT: 0in; PADDING-TOP: 0in;" valign="bottom">  </td></tr> <tr style="padding:0;PADDING-BOTTOM: 0px; PADDING-LEFT: 0px; PADDING-RIGHT: 0px; PADDING-TOP: 0px;"> <td style="PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 49%; PADDING-RIGHT: 0in; PADDING-TOP: 0in;" valign="bottom" width="49%">  </td> <td style="PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 2.5%; PADDING-RIGHT: 0in; PADDING-TOP: 0in;" valign="bottom" width="2%">  </td> <td style="BORDER-BOTTOM: windowtext 1pt solid; BORDER-LEFT: medium none; PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 10.02%; PADDING-RIGHT: 0in; BORDER-TOP: medium none; BORDER-RIGHT: medium none; PADDING-TOP: 0in;" valign="bottom" width="10%" colspan="2"> 2013</td> <td style="PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 2.5%; PADDING-RIGHT: 0in; PADDING-TOP: 0in;" valign="bottom" width="2%">  </td> <td style="BORDER-BOTTOM: windowtext 1pt solid; BORDER-LEFT: medium none; PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 10%; PADDING-RIGHT: 0in; BORDER-TOP: windowtext 1pt solid; BORDER-RIGHT: medium none; PADDING-TOP: 0in;" valign="bottom" width="10%" colspan="2"> 2012</td> <td style="PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 2.5%; PADDING-RIGHT: 0in; PADDING-TOP: 0in;" valign="bottom" width="2%">  </td> <td style="BORDER-BOTTOM: windowtext 1pt solid; BORDER-LEFT: medium none; PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 10%; PADDING-RIGHT: 0in; BORDER-TOP: medium none; BORDER-RIGHT: medium none; PADDING-TOP: 0in;" valign="bottom" width="10%" colspan="2"> 2013</td> <td style="PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 2.5%; PADDING-RIGHT: 0in; PADDING-TOP: 0in;" valign="bottom" width="2%">  </td> <td style="BORDER-BOTTOM: windowtext 1pt solid; BORDER-LEFT: medium none; PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 10%; PADDING-RIGHT: 0in; BORDER-TOP: windowtext 1pt solid; BORDER-RIGHT: medium none; PADDING-TOP: 0in;" valign="bottom" width="10%" colspan="2"> 2012</td> <td style="PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 0.98%; PADDING-RIGHT: 0in; PADDING-TOP: 0in;" valign="bottom">  </td></tr> <tr style="padding:0;PADDING-BOTTOM: 0px; PADDING-LEFT: 0px; PADDING-RIGHT: 0px; PADDING-TOP: 0px;"> <td style="PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 49%; PADDING-RIGHT: 0in; PADDING-TOP: 0in;" valign="bottom" width="49%">  </td> <td style="PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 2.5%; PADDING-RIGHT: 0in; PADDING-TOP: 0in;" valign="bottom" width="2%">  </td> <td style="BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 10.02%; PADDING-RIGHT: 0in; BORDER-TOP: medium none; BORDER-RIGHT: medium none; PADDING-TOP: 0in;" valign="bottom" width="10%" colspan="2">  </td> <td style="PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 2.5%; PADDING-RIGHT: 0in; PADDING-TOP: 0in;" valign="bottom" width="2%">  </td> <td style="BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 10%; PADDING-RIGHT: 0in; BORDER-TOP: medium none; BORDER-RIGHT: medium none; PADDING-TOP: 0in;" valign="bottom" width="10%" colspan="2">  </td> <td style="PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 2.5%; PADDING-RIGHT: 0in; PADDING-TOP: 0in;" valign="bottom" width="2%">  </td> <td style="BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 10%; PADDING-RIGHT: 0in; BORDER-TOP: medium none; BORDER-RIGHT: medium none; PADDING-TOP: 0in;" valign="bottom" width="10%" colspan="2">  </td> <td style="PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 2.5%; PADDING-RIGHT: 0in; PADDING-TOP: 0in;" valign="bottom" width="2%">  </td> <td style="BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 10%; PADDING-RIGHT: 0in; BORDER-TOP: medium none; BORDER-RIGHT: medium none; PADDING-TOP: 0in;" valign="bottom" width="10%" colspan="2">  </td> <td style="PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 0.98%; PADDING-RIGHT: 0in; PADDING-TOP: 0in;" valign="bottom">  </td></tr> <tr style="padding:0;PADDING-BOTTOM: 0px; PADDING-LEFT: 0px; PADDING-RIGHT: 0px; PADDING-TOP: 0px;"> <td style="PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 49%; PADDING-RIGHT: 0in; PADDING-TOP: 0in;" valign="top" width="49%"> Beginning balance</td> <td style="PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 2.5%; PADDING-RIGHT: 0in; PADDING-TOP: 0in;" valign="bottom" width="2%">  </td> <td style="PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 2.08%; PADDING-RIGHT: 0in; PADDING-TOP: 0in;" valign="bottom" width="2%"> $</td> <td style="PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 7.94%; PADDING-RIGHT: 0in; PADDING-TOP: 0in;" valign="bottom" width="7%"> 78,755</td> <td style="PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 2.5%; PADDING-RIGHT: 0in; PADDING-TOP: 0in;" valign="bottom" width="2%">  </td> <td style="PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 2.06%; PADDING-RIGHT: 0in; PADDING-TOP: 0in;" valign="bottom" width="2%"> $</td> <td style="PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 7.94%; PADDING-RIGHT: 0in; PADDING-TOP: 0in;" valign="bottom" width="7%"> 76,902</td> <td style="PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 2.5%; PADDING-RIGHT: 0in; PADDING-TOP: 0in;" valign="bottom" width="2%">  </td> <td style="PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 2.06%; PADDING-RIGHT: 0in; PADDING-TOP: 0in;" valign="bottom" width="2%"> $</td> <td style="PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 7.94%; PADDING-RIGHT: 0in; PADDING-TOP: 0in;" valign="bottom" width="7%"> 77,046</td> <td style="PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 2.5%; PADDING-RIGHT: 0in; PADDING-TOP: 0in;" valign="bottom" width="2%">  </td> <td style="PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 2.06%; PADDING-RIGHT: 0in; PADDING-TOP: 0in;" valign="bottom" width="2%"> $</td> <td style="PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 7.94%; PADDING-RIGHT: 0in; PADDING-TOP: 0in;" valign="bottom" width="7%"> 73,201</td> <td style="PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 0.98%; PADDING-RIGHT: 0in; PADDING-TOP: 0in;" valign="bottom">  </td></tr> <tr style="padding:0;PADDING-BOTTOM: 0px; PADDING-LEFT: 0px; PADDING-RIGHT: 0px; PADDING-TOP: 0px;"> <td style="PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 49%; PADDING-RIGHT: 0in; PADDING-TOP: 0in;" valign="top" width="49%"> Accruals increase</td> <td style="PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 2.5%; PADDING-RIGHT: 0in; PADDING-TOP: 0in;" valign="bottom" width="2%">  </td> <td style="PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 10.02%; PADDING-RIGHT: 0in; PADDING-TOP: 0in;" valign="bottom" width="10%" colspan="2"> 3,982</td> <td style="PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 2.5%; PADDING-RIGHT: 0in; PADDING-TOP: 0in;" valign="bottom" width="2%">  </td> <td style="PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 10%; PADDING-RIGHT: 0in; PADDING-TOP: 0in;" valign="bottom" width="10%" colspan="2"> 6,291</td> <td style="PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 2.5%; PADDING-RIGHT: 0in; PADDING-TOP: 0in;" valign="bottom" width="2%">  </td> <td style="PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 10%; PADDING-RIGHT: 0in; PADDING-TOP: 0in;" valign="bottom" width="10%" colspan="2"> 7,947</td> <td style="PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 2.5%; PADDING-RIGHT: 0in; PADDING-TOP: 0in;" valign="bottom" width="2%">  </td> <td style="PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 10%; PADDING-RIGHT: 0in; PADDING-TOP: 0in;" valign="bottom" width="10%" colspan="2"> 12,214</td> <td style="PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 0.98%; PADDING-RIGHT: 0in; PADDING-TOP: 0in;" valign="bottom">  </td></tr> <tr style="padding:0;PADDING-BOTTOM: 0px; PADDING-LEFT: 0px; PADDING-RIGHT: 0px; PADDING-TOP: 0px;"> <td style="PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 49%; PADDING-RIGHT: 0in; PADDING-TOP: 0in;" valign="top" width="49%"> Payments</td> <td style="PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 2.5%; PADDING-RIGHT: 0in; PADDING-TOP: 0in;" valign="bottom" width="2%">  </td> <td style="PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 10.02%; PADDING-RIGHT: 0in; PADDING-TOP: 0in;" valign="bottom" width="10%" colspan="2"> (2,727)</td> <td style="PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 2.5%; PADDING-RIGHT: 0in; PADDING-TOP: 0in;" valign="bottom" width="2%">  </td> <td style="PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 10%; PADDING-RIGHT: 0in; PADDING-TOP: 0in;" valign="bottom" width="10%" colspan="2"> (2,683)</td> <td style="PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 2.5%; PADDING-RIGHT: 0in; PADDING-TOP: 0in;" valign="bottom" width="2%">  </td> <td style="PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 10%; PADDING-RIGHT: 0in; PADDING-TOP: 0in;" valign="bottom" width="10%" colspan="2"> (5,603)</td> <td style="PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 2.5%; PADDING-RIGHT: 0in; PADDING-TOP: 0in;" valign="bottom" width="2%">  </td> <td style="PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 10%; PADDING-RIGHT: 0in; PADDING-TOP: 0in;" valign="bottom" width="10%" colspan="2"> (5,589)</td> <td style="PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 0.98%; PADDING-RIGHT: 0in; PADDING-TOP: 0in;" valign="bottom">  </td></tr> <tr style="padding:0;PADDING-BOTTOM: 0px; PADDING-LEFT: 0px; PADDING-RIGHT: 0px; PADDING-TOP: 0px;"> <td style="PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 49%; PADDING-RIGHT: 0in; PADDING-TOP: 0in;" valign="top" width="49%"> Interest accretion</td> <td style="PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 2.5%; PADDING-RIGHT: 0in; PADDING-TOP: 0in;" valign="bottom" width="2%">  </td> <td style="BORDER-BOTTOM: windowtext 1pt solid; BORDER-LEFT: medium none; PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 10.02%; PADDING-RIGHT: 0in; BORDER-TOP: medium none; BORDER-RIGHT: medium none; PADDING-TOP: 0in;" valign="bottom" width="10%" colspan="2"> 620</td> <td style="PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 2.5%; PADDING-RIGHT: 0in; PADDING-TOP: 0in;" valign="bottom" width="2%">  </td> <td style="BORDER-BOTTOM: windowtext 1pt solid; BORDER-LEFT: medium none; PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 10%; PADDING-RIGHT: 0in; BORDER-TOP: medium none; BORDER-RIGHT: medium none; PADDING-TOP: 0in;" valign="bottom" width="10%" colspan="2"> 685</td> <td style="PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 2.5%; PADDING-RIGHT: 0in; PADDING-TOP: 0in;" valign="bottom" width="2%">  </td> <td style="BORDER-BOTTOM: windowtext 1pt solid; BORDER-LEFT: medium none; PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 10%; PADDING-RIGHT: 0in; BORDER-TOP: medium none; BORDER-RIGHT: medium none; PADDING-TOP: 0in;" valign="bottom" width="10%" colspan="2"> 1,240</td> <td style="PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 2.5%; PADDING-RIGHT: 0in; PADDING-TOP: 0in;" valign="bottom" width="2%">  </td> <td style="BORDER-BOTTOM: windowtext 1pt solid; BORDER-LEFT: medium none; PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 10%; PADDING-RIGHT: 0in; BORDER-TOP: medium none; BORDER-RIGHT: medium none; PADDING-TOP: 0in;" valign="bottom" width="10%" colspan="2"> 1,369</td> <td style="PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 0.98%; PADDING-RIGHT: 0in; PADDING-TOP: 0in;" valign="bottom">  </td></tr> <tr style="padding:0;PADDING-BOTTOM: 0px; PADDING-LEFT: 0px; PADDING-RIGHT: 0px; PADDING-TOP: 0px;"> <td style="PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 49%; PADDING-RIGHT: 0in; PADDING-TOP: 0in;" valign="top" width="49%"> Ending balance</td> <td style="PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 2.5%; PADDING-RIGHT: 0in; PADDING-TOP: 0in;" valign="bottom" width="2%">  </td> <td style="BORDER-BOTTOM: windowtext 2.25pt double; BORDER-LEFT: medium none; PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 2.08%; PADDING-RIGHT: 0in; BORDER-TOP: medium none; BORDER-RIGHT: medium none; PADDING-TOP: 0in;" valign="bottom" width="2%"> $</td> <td style="BORDER-BOTTOM: windowtext 2.25pt double; BORDER-LEFT: medium none; PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 7.94%; PADDING-RIGHT: 0in; BORDER-TOP: windowtext 1pt solid; BORDER-RIGHT: medium none; PADDING-TOP: 0in;" valign="bottom" width="7%"> 80,630</td> <td style="PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 2.5%; PADDING-RIGHT: 0in; PADDING-TOP: 0in;" valign="bottom" width="2%">  </td> <td style="BORDER-BOTTOM: windowtext 2.25pt double; BORDER-LEFT: medium none; PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 2.06%; PADDING-RIGHT: 0in; BORDER-TOP: medium none; BORDER-RIGHT: medium none; PADDING-TOP: 0in;" valign="bottom" width="2%"> $</td> <td style="BORDER-BOTTOM: windowtext 2.25pt double; BORDER-LEFT: medium none; PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 7.94%; PADDING-RIGHT: 0in; BORDER-TOP: windowtext 1pt solid; BORDER-RIGHT: medium none; PADDING-TOP: 0in;" valign="bottom" width="7%"> 81,195</td> <td style="PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 2.5%; PADDING-RIGHT: 0in; PADDING-TOP: 0in;" valign="bottom" width="2%">  </td> <td style="BORDER-BOTTOM: windowtext 2.25pt double; BORDER-LEFT: medium none; PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 2.06%; PADDING-RIGHT: 0in; BORDER-TOP: medium none; BORDER-RIGHT: medium none; PADDING-TOP: 0in;" valign="bottom" width="2%"> $</td> <td style="BORDER-BOTTOM: windowtext 2.25pt double; BORDER-LEFT: medium none; PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 7.94%; PADDING-RIGHT: 0in; BORDER-TOP: windowtext 1pt solid; BORDER-RIGHT: medium none; PADDING-TOP: 0in;" valign="bottom" width="7%"> 80,630</td> <td style="PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 2.5%; PADDING-RIGHT: 0in; PADDING-TOP: 0in;" valign="bottom" width="2%">  </td> <td style="BORDER-BOTTOM: windowtext 2.25pt double; BORDER-LEFT: medium none; PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 2.06%; PADDING-RIGHT: 0in; BORDER-TOP: medium none; BORDER-RIGHT: medium none; PADDING-TOP: 0in;" valign="bottom" width="2%"> $</td> <td style="BORDER-BOTTOM: windowtext 2.25pt double; BORDER-LEFT: medium none; PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 7.94%; PADDING-RIGHT: 0in; BORDER-TOP: windowtext 1pt solid; BORDER-RIGHT: medium none; PADDING-TOP: 0in;" valign="bottom" width="7%"> 81,195</td> <td style="PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 0.98%; PADDING-RIGHT: 0in; PADDING-TOP: 0in;" valign="bottom">  </td></tr></table></div>falsefalsefalsenonnum:textBlockItemTypenaTabular disclosure of the changes in the liability for workers' compensation during the period.No definition available.false0Reconciliation of Changes in Workers Compensation Liability3false 0truefalsetruefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalse2false truefalseD2013Q2YTD_OtherPostretirementBenefitPlansDefinedBenefitMemberhttp://www.sec.gov/CIK0001344980duration2013-01-01T00:00:002013-06-30T00:00:00falsefalseBlack Lungus-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_OtherPostretirementBenefitPlansDefinedBenefitMemberus-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisexplicitMembernanafalse0Black Lung4true 3us-gaap_DefinedBenefitPlanDisclosureLineItemsus-gaap_truenadurationfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1falsefalsefalse00falsefalsefalsexbrli:stringItemTypestringfalse0Accrued Workers Compensation And Pneumoconiosis Benefits5false 4us-gaap_ScheduleOfNetBenefitCostsTableTextBlockus-gaap_truenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse00<div style="font-size:10.0pt;font-family:Times New Roman;FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt;"> Components of the net periodic benefit cost for each of the periods presented are as follows (in thousands):   <table style="text-align:left;TEXT-ALIGN: left; WIDTH: 947px; BORDER-COLLAPSE: collapse;" border="0" cellspacing="0" cellpadding="0" width="947"> <tr style="padding:0;PADDING-BOTTOM: 0px; PADDING-LEFT: 0px; PADDING-RIGHT: 0px; PADDING-TOP: 0px;"> <td style="PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 49%; PADDING-RIGHT: 0in; PADDING-TOP: 0in;" valign="bottom" width="49%">  </td> <td style="PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 2.5%; PADDING-RIGHT: 0in; PADDING-TOP: 0in;" valign="bottom" width="2%">  </td> <td style="BORDER-BOTTOM: windowtext 1pt solid; BORDER-LEFT: medium none; PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 22.5%; PADDING-RIGHT: 0in; BORDER-TOP: medium none; BORDER-RIGHT: medium none; PADDING-TOP: 0in;" valign="bottom" width="22%" colspan="5"> Three Months Ended June 30,</td> <td style="PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 2.5%; PADDING-RIGHT: 0in; PADDING-TOP: 0in;" valign="bottom" width="2%">  </td> <td style="BORDER-BOTTOM: windowtext 1pt solid; BORDER-LEFT: medium none; PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 22.5%; PADDING-RIGHT: 0in; BORDER-TOP: medium none; BORDER-RIGHT: medium none; PADDING-TOP: 0in;" valign="bottom" width="22%" colspan="5"> Six Months Ended June 30,</td> <td style="PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 1%; PADDING-RIGHT: 0in; PADDING-TOP: 0in;" valign="bottom" width="1%">  </td></tr> <tr style="padding:0;PADDING-BOTTOM: 0px; PADDING-LEFT: 0px; PADDING-RIGHT: 0px; PADDING-TOP: 0px;"> <td style="PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 49%; PADDING-RIGHT: 0in; PADDING-TOP: 0in;" valign="bottom" width="49%">  </td> <td style="PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 2.5%; PADDING-RIGHT: 0in; PADDING-TOP: 0in;" valign="bottom" width="2%">  </td> <td style="BORDER-BOTTOM: windowtext 1pt solid; BORDER-LEFT: medium none; PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 10%; PADDING-RIGHT: 0in; BORDER-TOP: medium none; BORDER-RIGHT: medium none; PADDING-TOP: 0in;" valign="bottom" width="10%" colspan="2"> 2013</td> <td style="PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 2.5%; PADDING-RIGHT: 0in; PADDING-TOP: 0in;" valign="bottom" width="2%">  </td> <td style="BORDER-BOTTOM: windowtext 1pt solid; BORDER-LEFT: medium none; PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 10%; PADDING-RIGHT: 0in; BORDER-TOP: windowtext 1pt solid; BORDER-RIGHT: medium none; PADDING-TOP: 0in;" valign="bottom" width="10%" colspan="2"> 2012</td> <td style="PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 2.5%; PADDING-RIGHT: 0in; PADDING-TOP: 0in;" valign="bottom" width="2%">  </td> <td style="BORDER-BOTTOM: windowtext 1pt solid; BORDER-LEFT: medium none; PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 10%; PADDING-RIGHT: 0in; BORDER-TOP: medium none; BORDER-RIGHT: medium none; PADDING-TOP: 0in;" valign="bottom" width="10%" colspan="2"> 2013</td> <td style="BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 2.5%; PADDING-RIGHT: 0in; BORDER-TOP: windowtext 1pt solid; BORDER-RIGHT: medium none; PADDING-TOP: 0in;" valign="bottom" width="2%">  </td> <td style="BORDER-BOTTOM: windowtext 1pt solid; BORDER-LEFT: medium none; PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 10%; PADDING-RIGHT: 0in; BORDER-TOP: windowtext 1pt solid; BORDER-RIGHT: medium none; PADDING-TOP: 0in;" valign="bottom" width="10%" colspan="2"> 2012</td> <td style="PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 1%; PADDING-RIGHT: 0in; PADDING-TOP: 0in;" valign="bottom" width="1%">  </td></tr> <tr style="padding:0;PADDING-BOTTOM: 0px; PADDING-LEFT: 0px; PADDING-RIGHT: 0px; PADDING-TOP: 0px;"> <td style="PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 49%; PADDING-RIGHT: 0in; PADDING-TOP: 0in;" valign="bottom" width="49%">  </td> <td style="PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 2.5%; PADDING-RIGHT: 0in; PADDING-TOP: 0in;" valign="bottom" width="2%">  </td> <td style="BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 10%; PADDING-RIGHT: 0in; BORDER-TOP: medium none; BORDER-RIGHT: medium none; PADDING-TOP: 0in;" valign="bottom" width="10%" colspan="2">  </td> <td style="PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 2.5%; PADDING-RIGHT: 0in; PADDING-TOP: 0in;" valign="bottom" width="2%">  </td> <td style="BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 10%; PADDING-RIGHT: 0in; BORDER-TOP: medium none; BORDER-RIGHT: medium none; PADDING-TOP: 0in;" valign="bottom" width="10%" colspan="2">  </td> <td style="PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 2.5%; PADDING-RIGHT: 0in; PADDING-TOP: 0in;" valign="bottom" width="2%">  </td> <td style="BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 10%; PADDING-RIGHT: 0in; BORDER-TOP: medium none; BORDER-RIGHT: medium none; PADDING-TOP: 0in;" valign="bottom" width="10%" colspan="2">  </td> <td style="PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 2.5%; PADDING-RIGHT: 0in; PADDING-TOP: 0in;" valign="bottom" width="2%">  </td> <td style="BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 10%; PADDING-RIGHT: 0in; BORDER-TOP: medium none; BORDER-RIGHT: medium none; PADDING-TOP: 0in;" valign="bottom" width="10%" colspan="2">  </td> <td style="PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 1%; PADDING-RIGHT: 0in; PADDING-TOP: 0in;" valign="bottom" width="1%">  </td></tr> <tr style="padding:0;PADDING-BOTTOM: 0px; PADDING-LEFT: 0px; PADDING-RIGHT: 0px; PADDING-TOP: 0px;"> <td style="PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 49%; PADDING-RIGHT: 0in; PADDING-TOP: 0in;" valign="top" width="49%"> Service cost</td> <td style="PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 2.5%; PADDING-RIGHT: 0in; PADDING-TOP: 0in;" valign="bottom" width="2%">  </td> <td style="PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 2%; PADDING-RIGHT: 0in; PADDING-TOP: 0in;" valign="bottom" width="2%"> $</td> <td style="PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 8%; PADDING-RIGHT: 0in; PADDING-TOP: 0in;" valign="bottom" width="8%"> 951</td> <td style="PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 2.5%; PADDING-RIGHT: 0in; PADDING-TOP: 0in;" valign="bottom" width="2%">  </td> <td style="PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 2%; PADDING-RIGHT: 0in; PADDING-TOP: 0in;" valign="bottom" width="2%"> $</td> <td style="PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 8%; PADDING-RIGHT: 0in; PADDING-TOP: 0in;" valign="bottom" width="8%"> 963</td> <td style="PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 2.5%; PADDING-RIGHT: 0in; PADDING-TOP: 0in;" valign="bottom" width="2%">  </td> <td style="PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 2%; PADDING-RIGHT: 0in; PADDING-TOP: 0in;" valign="bottom" width="2%"> $</td> <td style="PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 8%; PADDING-RIGHT: 0in; PADDING-TOP: 0in;" valign="bottom" width="8%"> 1,905</td> <td style="PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 2.5%; PADDING-RIGHT: 0in; PADDING-TOP: 0in;" valign="bottom" width="2%">  </td> <td style="PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 2%; PADDING-RIGHT: 0in; PADDING-TOP: 0in;" valign="bottom" width="2%"> $</td> <td style="PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 8%; PADDING-RIGHT: 0in; PADDING-TOP: 0in;" valign="bottom" width="8%"> 1,835</td> <td style="PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 1%; PADDING-RIGHT: 0in; PADDING-TOP: 0in;" valign="bottom" width="1%">  </td></tr> <tr style="padding:0;PADDING-BOTTOM: 0px; PADDING-LEFT: 0px; PADDING-RIGHT: 0px; PADDING-TOP: 0px;"> <td style="PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 49%; PADDING-RIGHT: 0in; PADDING-TOP: 0in;" valign="top" width="49%"> Interest cost</td> <td style="PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 2.5%; PADDING-RIGHT: 0in; PADDING-TOP: 0in;" valign="bottom" width="2%">  </td> <td style="PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 10%; PADDING-RIGHT: 0in; PADDING-TOP: 0in;" valign="bottom" width="10%" colspan="2"> 564</td> <td style="PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 2.5%; PADDING-RIGHT: 0in; PADDING-TOP: 0in;" valign="bottom" width="2%">  </td> <td style="PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 10%; PADDING-RIGHT: 0in; PADDING-TOP: 0in;" valign="bottom" width="10%" colspan="2"> 599</td> <td style="PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 2.5%; PADDING-RIGHT: 0in; PADDING-TOP: 0in;" valign="bottom" width="2%">  </td> <td style="PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 10%; PADDING-RIGHT: 0in; PADDING-TOP: 0in;" valign="bottom" width="10%" colspan="2"> 1,127</td> <td style="PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 2.5%; PADDING-RIGHT: 0in; PADDING-TOP: 0in;" valign="bottom" width="2%">  </td> <td style="PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 10%; PADDING-RIGHT: 0in; PADDING-TOP: 0in;" valign="bottom" width="10%" colspan="2"> 1,175</td> <td style="PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 1%; PADDING-RIGHT: 0in; PADDING-TOP: 0in;" valign="bottom" width="1%">  </td></tr> <tr style="padding:0;PADDING-BOTTOM: 0px; PADDING-LEFT: 0px; PADDING-RIGHT: 0px; PADDING-TOP: 0px;"> <td style="PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 49%; PADDING-RIGHT: 0in; PADDING-TOP: 0in;" valign="top" width="49%"> Amortization of net loss (1)</td> <td style="PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 2.5%; PADDING-RIGHT: 0in; PADDING-TOP: 0in;" valign="bottom" width="2%">  </td> <td style="BORDER-BOTTOM: windowtext 1pt solid; BORDER-LEFT: medium none; PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 10%; PADDING-RIGHT: 0in; BORDER-TOP: medium none; BORDER-RIGHT: medium none; PADDING-TOP: 0in;" valign="bottom" width="10%" colspan="2"> 167</td> <td style="PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 2.5%; PADDING-RIGHT: 0in; PADDING-TOP: 0in;" valign="bottom" width="2%">  </td> <td style="BORDER-BOTTOM: windowtext 1pt solid; BORDER-LEFT: medium none; PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 10%; PADDING-RIGHT: 0in; BORDER-TOP: medium none; BORDER-RIGHT: medium none; PADDING-TOP: 0in;" valign="bottom" width="10%" colspan="2"> 194</td> <td style="PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 2.5%; PADDING-RIGHT: 0in; PADDING-TOP: 0in;" valign="bottom" width="2%">  </td> <td style="BORDER-BOTTOM: windowtext 1pt solid; BORDER-LEFT: medium none; PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 10%; PADDING-RIGHT: 0in; BORDER-TOP: medium none; BORDER-RIGHT: medium none; PADDING-TOP: 0in;" valign="bottom" width="10%" colspan="2"> 335</td> <td style="PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 2.5%; PADDING-RIGHT: 0in; PADDING-TOP: 0in;" valign="bottom" width="2%">  </td> <td style="BORDER-BOTTOM: windowtext 1pt solid; BORDER-LEFT: medium none; PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 10%; PADDING-RIGHT: 0in; BORDER-TOP: medium none; BORDER-RIGHT: medium none; PADDING-TOP: 0in;" valign="bottom" width="10%" colspan="2"> 388</td> <td style="PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 1%; PADDING-RIGHT: 0in; PADDING-TOP: 0in;" valign="bottom" width="1%">  </td></tr> <tr style="padding:0;PADDING-BOTTOM: 0px; PADDING-LEFT: 0px; PADDING-RIGHT: 0px; PADDING-TOP: 0px;"> <td style="PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 49%; PADDING-RIGHT: 0in; PADDING-TOP: 0in;" valign="top" width="49%"> Net periodic benefit cost</td> <td style="PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 2.5%; PADDING-RIGHT: 0in; PADDING-TOP: 0in;" valign="bottom" width="2%">  </td> <td style="BORDER-BOTTOM: windowtext 2.25pt double; BORDER-LEFT: medium none; PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 2%; PADDING-RIGHT: 0in; BORDER-TOP: medium none; BORDER-RIGHT: medium none; PADDING-TOP: 0in;" valign="bottom" width="2%"> $</td> <td style="BORDER-BOTTOM: windowtext 2.25pt double; BORDER-LEFT: medium none; PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 8%; PADDING-RIGHT: 0in; BORDER-TOP: windowtext 1pt solid; BORDER-RIGHT: medium none; PADDING-TOP: 0in;" valign="bottom" width="8%"> 1,682</td> <td style="PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 2.5%; PADDING-RIGHT: 0in; PADDING-TOP: 0in;" valign="bottom" width="2%">  </td> <td style="BORDER-BOTTOM: windowtext 2.25pt double; BORDER-LEFT: medium none; PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 2%; PADDING-RIGHT: 0in; BORDER-TOP: medium none; BORDER-RIGHT: medium none; PADDING-TOP: 0in;" valign="bottom" width="2%"> $</td> <td style="BORDER-BOTTOM: windowtext 2.25pt double; BORDER-LEFT: medium none; PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 8%; PADDING-RIGHT: 0in; BORDER-TOP: windowtext 1pt solid; BORDER-RIGHT: medium none; PADDING-TOP: 0in;" valign="bottom" width="8%"> 1,756</td> <td style="PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 2.5%; PADDING-RIGHT: 0in; PADDING-TOP: 0in;" valign="bottom" width="2%">  </td> <td style="BORDER-BOTTOM: windowtext 2.25pt double; BORDER-LEFT: medium none; PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 2%; PADDING-RIGHT: 0in; BORDER-TOP: medium none; BORDER-RIGHT: medium none; PADDING-TOP: 0in;" valign="bottom" width="2%"> $</td> <td style="BORDER-BOTTOM: windowtext 2.25pt double; BORDER-LEFT: medium none; PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 8%; PADDING-RIGHT: 0in; BORDER-TOP: windowtext 1pt solid; BORDER-RIGHT: medium none; PADDING-TOP: 0in;" valign="bottom" width="8%"> 3,367</td> <td style="PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 2.5%; PADDING-RIGHT: 0in; PADDING-TOP: 0in;" valign="bottom" width="2%">  </td> <td style="BORDER-BOTTOM: windowtext 2.25pt double; BORDER-LEFT: medium none; PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 2%; PADDING-RIGHT: 0in; BORDER-TOP: medium none; BORDER-RIGHT: medium none; PADDING-TOP: 0in;" valign="bottom" width="2%"> $</td> <td style="BORDER-BOTTOM: windowtext 2.25pt double; BORDER-LEFT: medium none; PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 8%; PADDING-RIGHT: 0in; BORDER-TOP: windowtext 1pt solid; BORDER-RIGHT: medium none; PADDING-TOP: 0in;" valign="bottom" width="8%"> 3,398</td> <td style="PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 1%; PADDING-RIGHT: 0in; PADDING-TOP: 0in;" valign="bottom" width="1%">  </td></tr></table>   (1)   Amortization of net loss is included in the operating expenses line item within our condensed consolidated statements of income.</div>falsefalsefalsenonnum:textBlockItemTypenaTabular disclosure of the components of net benefit costs for pension plans and/or other employee benefit plans including service cost, interest cost, expected return on plan assets, gain (loss), prior service cost or credit, transition asset or obligation, and gain (loss) recognized due to settlements or curtailments.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (h) -URI http://asc.fasb.org/extlink&oid=21915506&loc=d3e1928-114920 false0Components of Net Periodic Benefit CostfalseWORKERS' COMPENSATION AND PNEUMOCONIOSIS (Tables)UnKnownUnKnownUnKnownUnKnowntruefalsefalseSheethttp://www.ahgp.com/role/DisclosureWorkersCompensationAndPneumoconiosisTables15