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Derivative Instruments (Tables) | 9 Months Ended
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Sep. 30, 2025
Derivative Instruments and Hedging Activities Disclosure [Abstract] |
Derivative Instruments | The following table presents changes in the fair value of the Level 3 derivatives for the three and nine months ended September 30, 2025 and 2024:
|  |  | For The Three Months Ended September 30, |  | For The Nine Months Ended September 30,
(dollars in thousands) |  |  | 2025 |  | 2024 |  | 2025 |  | 2024
Fair value at beginning of the period |  |  | $ | (11,244) |  |  | $ | (5,593) |  |  | $ | (8,823) |  |  | $ | (2,360) |
Unrealized (losses) gains on purchase power contracts |  |  | (3,031) |  |  | (2,727) |  |  | (5,452) |  |  | (5,960) |
Fair value at end of the period |  |  | $ | (14,275) |  |  | $ | (8,320) |  |  | $ | (14,275) |  |  | $ | (8,320) |

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- Definition Tabular disclosure of financial instrument classified as a derivative asset (liability) after deduction of derivative liability (asset) using recurring unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-3 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (d) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 + Details
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