Asset Impairment and Restructuring	9 Months Ended
Sep. 30, 2013
Asset Impairment and Restructuring [Abstract]
Asset Impairment and Restructuring	Asset Impairment and Restructuring In connection with plans announced to curtail mining operations and the associated company actions, the Company recorded severance expenses of $(266) and $12,781 and professional fees and other expenses of $393 and $9,687 for the three and nine months ended September 30, 2013, respectively. Additionally, during the three months ended September 30, 2013, the Company tested certain of its long-lived asset groups for impairment due primarily to a longer than expected recovery in the metallurgical coal markets and lower production and shipment levels compared with previous estimates and recorded asset impairment charges totaling $1,890 related to mineral reserves in an asset group in its All Other segment. During the second quarter of 2012, the Company recorded asset impairment charges totaling $990,923, of which $985,346 was recorded for asset groups in its Eastern Coal Operations segment and $5,577 was recorded for an asset group in the Company’s All Other segment. The asset impairment charges reduced the carrying values of mineral reserves by $714,580, property, plant and equipment by $271,827, and other acquired intangibles by $4,516. Additionally, the Company also recorded severance expenses of $7,495 and $22,931, professional fees and other expenses of $5,462 and $7,493, and reserved $719 and $7,263 for advanced royalties and deposits which may not be recoverable for the three and nine months ended September 30, 2012, respectively.

Asset Impairment and Restructuring

In connection with plans announced to curtail mining operations and the associated company actions, the Company recorded severance expenses of $(266) and $12,781 and professional fees and other expenses of $393 and $9,687 for the three and nine months ended September 30, 2013, respectively. Additionally, during the three months ended September 30, 2013, the Company tested certain of its long-lived asset groups for impairment due primarily to a longer than expected recovery in the metallurgical coal markets and lower production and shipment levels compared with previous estimates and recorded asset impairment charges totaling $1,890 related to mineral reserves in an asset group in its All Other segment.

During the second quarter of 2012, the Company recorded asset impairment charges totaling $990,923, of which $985,346 was recorded for asset groups in its Eastern Coal Operations segment and $5,577 was recorded for an asset group in the Company’s All Other segment. The asset impairment charges reduced the carrying values of mineral reserves by $714,580, property, plant and equipment by $271,827, and other acquired intangibles by $4,516. Additionally, the Company also recorded severance expenses of $7,495 and $22,931, professional fees and other expenses of $5,462 and $7,493, and reserved $719 and $7,263 for advanced royalties and deposits which may not be recoverable for the three and nine months ended September 30, 2012, respectively.