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REVENUE (Tables) | 12 Months Ended
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Dec. 31, 2024
REVENUE |
Schedule of revenue by major customers | ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | December 31,
​ |  | 2024 |  | 2023
Delivered energy (including contract liability amortization) |  | $ | 203,434 |  | $ | 211,772
Capacity | ​ |  | 58,093 | ​ |  | 56,155
Total Electric Operations sales | ​ | $ | 261,527 | ​ | $ | 267,927
Schedule of revenue by geographic area | ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | December 31,
​ |  | 2024 |  | 2023
Outside third-party Indiana customers |  | $ | 59,045 |  | $ | 144,942
Customers in Florida, North Carolina, Alabama and Georgia | ​ |  | 78,403 | ​ |  | 216,984
Total Coal Operations sales | ​ | $ | 137,448 | ​ | $ | 361,926
Schedule of amounts billed and due recorded as accounts receivable | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | December 31,
​ | ​ | 2024 |  | 2023 | ​ | 2022
Accounts receivable from contracts with customers |  | $ | 15,438 |  | $ | 19,937 |  | $ | 29,889
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Contract assets | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 19,567
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Contract liabilities - current | ​ | ​ | 97,598 | ​ | ​ | 66,316 | ​ | ​ | 123,599
Contract liabilities - long-term | ​ | ​ | 49,121 | ​ | ​ | 47,425 | ​ | ​ | 84,096
Total contract liabilities | ​ | ​ | 146,719 | ​ | ​ | 113,741 | ​ | ​ | 207,695

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- Definition Tabular disclosure of receivable, contract asset, and contract liability from contract with customer. Includes, but is not limited to, change in contract asset and contract liability. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 10 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479806/606-10-50-10 + Details
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- Definition Tabular disclosure of revenue from external customers by geographic areas attributed to the entity's country of domicile and to foreign countries from which the entity derives revenue. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 41 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482810/280-10-50-41 + Details
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- Definition Tabular disclosure of the extent of the entity's reliance on its major customers, if revenues from transactions with a single external customer amount to 10 percent or more of entity revenues, including the disclosure of that fact, the total amount of revenues from each such customer, and the identity of the reportable segment or segments reporting the revenues. The entity need not disclose the identity of a major customer or the amount of revenues that each segment reports from that customer. For these purposes, a group of companies known to the entity to be under common control is considered a single customer, and the federal government, a state government, a local government such as a county or municipality, or a foreign government is each considered a single customer. + References No definition available. + Details
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