Derivative and Hedging Instruments (Details-4) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Current and Long-Term Regulatory Asset (Liability) [Member]
Change In Derivative Fair Value [Roll Forward]
Beginning balance,	$ 7,813	$ (9,641)	$ 5,094	$ (617)
Unrealized loss (gain)	92	(5,988)	14,395	(17,321)
Realized (loss) gain reclassified to a deferred account	(1,988)	1,551	(8,905)	2,830
Realized (loss) gain reclassified to income statement	(900)	5,594	(5,567)	6,624
Ending balance,	5,017	(8,484)	5,017	(8,484)
Other Current Assets [Member]
Change In Derivative Fair Value [Roll Forward]
Beginning balance,	455	267	2,747	770
Unrealized loss (gain)	0	0	0	0
Realized (loss) gain reclassified to a deferred account	1,988	(1,551)	8,905	(2,830)
Realized (loss) gain reclassified to income statement	(1,369)	1,123	(10,578)	1,899
Ending balance,	$ 1,074	$ (161)	$ 1,074	$ (161)