Derivative and Hedging Instruments (Details-4) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Current and Long-Term Regulatory Asset [Member]
Change in Derivative Fair Value [Roll Forward]
Beginning balance	$ 13,989	$ 26,875
Unrealized gain	(23,173)	(4,895)
Realized (loss) gain reclassified to a deferred account	2,563	(2,232)
Realized (loss) gain reclassified to income statement	6,004	(5,759)
Ending balance	(617)	13,989
Other Current Assets [Member]
Change in Derivative Fair Value [Roll Forward]
Beginning balance	1,162	1,100
Unrealized gain
Realized (loss) gain reclassified to a deferred account	(2,563)	2,232
Realized (loss) gain reclassified to income statement	2,171	(2,170)
Ending balance	$ 770	$ 1,162