Fair Value Measurements - Schedule of Fair value for our risk management activities (Details) - Commodity Contracts - Level 3 - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Balance at beginning of period	$ (18,792)	$ (21,640)	$ (15,039)	$ 4,921
Deferred as a regulatory asset or liability	(18,492)	(25,576)	(22,121)	(58,984)
Settlements	19,283	29,128	18,879	39,076
Transfers into Level 3 from Level 2	(275)	0	(663)	(4,565)
Transfers from Level 3 into Level 2	0	0	668	1,464
Balance at end of period	(18,276)	(18,088)	(18,276)	(18,088)
Net unrealized gains/losses included in earnings related to instruments still held at end of period	$ 0	$ 0	$ 0	$ 0