Derivative and Hedging Instruments (Details-4) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Current and Long-Term Regulatory Asset (Liability) [Member]
Change In Derivative Fair Value [Roll Forward]
Beginning balance,	$ 5,017	$ (8,484)	$ 5,094	$ (617)
Unrealized loss (gain)	1,100	(4,385)	15,495	(21,706)
Realized (loss) gain reclassified to a deferred account	(1,676)	1,122	(10,581)	3,952
Realized (loss) gain reclassified to income statement	(1,893)	6,534	(7,460)	13,158
Ending balance,	2,548	(5,213)	2,548	(5,213)
Other Current Assets [Member]
Change In Derivative Fair Value [Roll Forward]
Beginning balance,	1,074	(161)	2,747	770
Unrealized loss (gain)	0	0	0	0
Realized (loss) gain reclassified to a deferred account	1,676	(1,122)	10,581	(3,952)
Realized (loss) gain reclassified to income statement	(2,155)	1,916	(12,733)	3,815
Ending balance,	$ 595	$ 633	$ 595	$ 633