Fair Value Measurements - Schedule of Fair value for our risk management activities (Details) - Commodity Contracts - Level 3 - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2026	Mar. 31, 2025
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Balance at beginning of period	$ (23,710)	$ (15,039)
Deferred as a regulatory asset or liability	(14,577)	(5,823)
Settlements	4,831	(2,287)
Transfers into Level 3 from Level 2	0	(59)
Transfers from Level 3 into Level 2	0	368
Balance at end of period	(33,456)	(22,840)
Net unrealized gains/losses included in earnings related to instruments still held at end of period	$ 0	$ 0