Fair Value Measurements - Fair Value For Our Risk Management Activities (Details) - Commodity Contracts - Level 3 - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Balance at beginning of period	$ (21,640)	$ (1,279)	$ 4,921	$ (4,888)
Deferred as a regulatory asset or liability	(25,576)	(9,999)	(58,984)	(67,285)
Settlements	29,128	18,103	39,076	68,681
Transfers into Level 3 from Level 2	0	0	(4,565)	(1,289)
Transfers from Level 3 into Level 2	0	0	1,464	11,606
Balance at end of period	(18,088)	6,825	(18,088)	6,825
Net unrealized gains included in earnings related to instruments still held at end of period	$ 0	$ 0	$ 0	$ 0