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Derivative Instruments - Power Derivative Transactions (Details) $ in Thousands	6 Months Ended
	Jun. 30, 2026 USD ($) MMBTU MWh
Natural gas | 2026
Derivative [Line Items]
Quantity | MMBTU	3,066,000
Derivative, fair value, net	$ (2,752)
Natural gas | 2027
Derivative [Line Items]
Quantity | MMBTU	12,264,000
Derivative, fair value, net	$ 507
Power forwards - sales | 2026
Derivative [Line Items]
Quantity | MWh	438,000
Derivative, fair value, net	$ 5,959
Power forwards - sales | 2027
Derivative [Line Items]
Quantity | MWh	1,752,000
Derivative, fair value, net	$ 2,378
Heat rate call option | 2026
Derivative [Line Items]
Quantity | MMBTU	2,628,000
Derivative, fair value, net	$ 13,891
Power forwards - purchases | 2026
Derivative [Line Items]
Quantity | MWh	344,030
Derivative, fair value, net	$ (6,145)
Power forwards - purchases | 2027
Derivative [Line Items]
Quantity | MWh	87,600
Derivative, fair value, net	$ (735)

X

- Definition

Fair value of the assets less the liabilities of a derivative or group of derivatives.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 825
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 10
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482907/825-10-50-10

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+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 815
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 5A
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480434/815-10-50-5A

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 505
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 18
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481112/505-10-50-18

Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 815
-SubTopic 20
-Name Accounting Standards Codification
-Section 25
-Paragraph 6A
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480682/815-20-25-6A

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- Definition

Nominal energy measure used to calculate payments on a derivative instrument.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 815
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 5
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480434/815-10-50-5

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