XML 142 R12.htm IDEA: XBRL DOCUMENT v3.22.0.1

LONG-LIVED ASSET IMPAIRMENTS	12 Months Ended
	Dec. 31, 2021
LONG-LIVED ASSET IMPAIRMENTS
LONG-LIVED ASSET IMPAIRMENTS	4. LONG-LIVED ASSET IMPAIRMENTS ​ During the year ended December 31, 2020, we recorded $23.5 million of non-cash asset impairment charges in our Illinois Basin Coal Operations segment due to sealing our idled Gibson North mine, resulting in its permanent closure, and a decrease in the fair value of certain mining equipment at our idled operations and greenfield coal mineral resources as a result of weakened coal market conditions including the impact of the COVID-19 pandemic. During the same period, we also recorded an asset impairment charge of $1.5 million in our Coal Royalties segment due to a decrease in the fair value of greenfield coal mineral resources held by Alliance Resource Properties near our coal mining operations in the Illinois Basin. See Note 24 – Segment Information for more information about our segments. ​ During the year ended December 31, 2019, we recorded asset impairment charges in our Illinois Basin Coal Operations segment and our Coal Royalties segment of $7.5 million and $7.7 million, respectively, due to the cessation of coal production at our Dotiki mine, effective August 16, 2019, in an effort to focus on maximizing production at our lower-cost mines in the Illinois Basin.  We adjusted the carrying value of assets associated with the Dotiki mine, including coal mineral reserves and resources held at Alliance Resource Properties, from $35.9 million to their fair value of $25.8 million and accrued $5.1 million with respect to scheduled payments to WKY CoalPlay, LLC ("WKY CoalPlay") for leased coal mineral reserves and resources from which we may not receive future economic benefit.  See Note 12 – Variable Interest Entities for more information about WKY CoalPlay. ​ The fair values of the impaired assets were determined using a market approach, which represents Level 3 fair value measurements under the fair value hierarchy.  The fair value analysis used assumptions regarding the marketability of certain mining and coal mineral reserve and resource assets near our Illinois Basin coal mining operations. ​ See Note 2 – Summary of Significant Accounting Policies – Long-Lived Asset Impairment for more information on our accounting policy for asset impairments.

X

- References

No definition available.

+ Details

Name:	us-gaap_AssetImpairmentChargesAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

The entire disclosure for the details of the charge against earnings resulting from the aggregate write down of all assets from their carrying value to their fair value. Disclosure may also include a description of the impaired asset and facts and circumstances leading to the impairment, amount of the impairment loss and where the loss is located in the income statement, method(s) for determining fair value, and the segment in which the impaired asset is reported.

+ References

No definition available.

+ Details

Name:	us-gaap_AssetImpairmentChargesTextBlock
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:textBlockItemType
Balance Type:	na
Period Type:	duration