Fair Value - Schedule of Activity For Energy Commodity Derivative Assets (Liabilities) Measured At Fair Value Using Significant Unobservable Inputs (Level 3) (Details) - Natural Gas Exchange Agreements [Member] - Level 3 [Member] - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Fair Value Liabilities Measured On Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning Balance	$ (6,197)	$ (6,201)	$ (7,771)	$ (8,410)
Included in regulatory assets/liabilities	5,196	268	7,695	3,488
Settlements	(1,288)	(145)	(2,213)	(1,156)
Ending Balance	$ (2,289)	$ (6,078)	$ (2,289)	$ (6,078)