Fair Value Measurements - Fair value for our risk management activities (Details) - Commodity Contracts - Level 3 - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Net derivative balance at beginning of period	$ 4,921	$ (4,888)
Deferred as a regulatory asset or liability	(60,965)	(70,214)
Settlements	44,156	69,706
Transfers into Level 3 from Level 2	(4,635)	(1,289)
Transfers from Level 3 into Level 2	1,484	11,606
Net derivative balance at end of period	(15,039)	4,921
Net unrealized gains/losses included in earnings related to instruments still held at end of period	$ 0	$ 0