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Restructuring Costs | 9 Months Ended
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Sep. 30, 2017
Restructuring and Related Activities [Abstract] |
Restructuring Costs | Restructuring Costs For the three months ended March 31, 2016 (Predecessor), the Predecessor recognized restructuring charges of approximately $3.4 million due to workforce reductions at the Alabama No. 7 underground mine, the Alabama No. 4 underground mine and corporate headquarters in conjunction with cost containment initiatives implemented in response to the deterioration in the metallurgical coal market. The restructuring charges consist primarily of severance and related benefits costs. The Company does not expect to incur any additional restructuring charges in the Successor periods in connection with the Predecessor restructuring actions.

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- Definition The entire disclosure for restructuring and related activities. Description of restructuring activities such as exit and disposal activities, include facts and circumstances leading to the plan, the expected plan completion date, the major types of costs associated with the plan activities, total expected costs, the accrual balance at the end of the period, and the periods over which the remaining accrual will be settled. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SAB Topic 5.P.4) -URI http://asc.fasb.org/extlink&oid=27011515&loc=d3e140904-122747 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 5.P.3) -URI http://asc.fasb.org/extlink&oid=27011515&loc=d3e140864-122747 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6394359&loc=d3e17939-110869 + Details
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