Fair Value Measurements - Fair value for our risk management activities (Details) - Commodity Contracts - Level 3 - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Net derivative balance at beginning of period	$ (4,888)	$ (2,738)
Deferred as a regulatory asset or liability	(70,214)	(374)
Settlements	69,706	(1,123)
Transfers into Level 3 from Level 2	(1,289)	(846)
Transfers from Level 3 into Level 2	11,606	193
Net derivative balance at end of period	4,921	(4,888)
Net unrealized gains included in earnings related to instruments still held at end of period	$ 0	$ 0