Fair Value Measurements - Fair value for our risk management activities (Details) - Commodity Contracts - Level 3 - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Net derivative beginning balance	$ (2,738)	$ (1,102)
Deferred as a regulatory asset or liability	(374)	13,827
Settlements	(1,123)	(15,463)
Transfers into Level 3 from Level 2	(846)	0
Transfers from Level 3 into Level 2	193	0
Net derivative ending balance	(4,888)	(2,738)
Net unrealized gains included in earnings related to instruments still held at end of period	$ 0	$ 0