Derivative Instruments - Schedule of Derivative Instruments as Recorded in Consolidated Balance Sheets (Details) - Not Designated as Hedging Instrument - USD ($) $ in Thousands	Jun. 30, 2025	Dec. 31, 2024
Price Risk Derivatives, at Fair Value, Net [Abstract]
Derivative asset (liability), net	$ 13,404	$ 11,038
FTRs
Price Risk Derivatives, at Fair Value, Net [Abstract]
Derivative asset	6,067	2,084
Derivative liability	(281)	(256)
Natural gas derivatives
Price Risk Derivatives, at Fair Value, Net [Abstract]
Derivative liability	(60)	0
Natural gas derivatives | Energy risk management assets, current
Price Risk Derivatives, at Fair Value, Net [Abstract]
Derivative asset	4,609	9,210
Natural gas derivatives | Energy risk management assets, noncurrent
Price Risk Derivatives, at Fair Value, Net [Abstract]
Derivative asset	$ 3,069	$ 0