XML 99 R16.htm IDEA: XBRL DOCUMENT v3.25.0.1

Intangible Assets

12 Months Ended

Dec. 31, 2024

Goodwill and Intangible Assets Disclosure [Abstract]

Intangible Assets

Intangible Assets

We have a coal supply agreement intangible asset which is subject to amortization based on units of production over the term of the lignite sales agreement which expires in 2032. The gross and net balances are set forth in the following table:

			Gross Carrying Amount						Accumulated Amortization and Impairment						Net Balance
Balance at December 31, 2024
Coal supply agreement			$	84,200					$	(78,725)					$	5,475
Balance at December 31, 2023
Coal supply agreement			$	84,200					$	(78,194)					$	6,006

Amortization expense for intangible assets was $0.5 million and $3.0 million in 2024 and 2023, respectively.

During 2023, we recorded a non-cash, long-lived asset impairment charge of $65.9 million. See Note 9 for further discussion of the impairment charge.

X

- References

No definition available.

+ Details

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

X

- Definition

The entire disclosure for goodwill and intangible assets.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 350
-SubTopic 30
-Name Accounting Standards Codification
-Publisher FASB
-URI https://asc.fasb.org/350-30/tableOfContent

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 350
-SubTopic 20
-Name Accounting Standards Codification
-Publisher FASB
-URI https://asc.fasb.org/350-20/tableOfContent

+ Details

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