Investment in ATC and ATC Holdco (Details-2) - ATC [Member] - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Schedule of Equity Method Investments [Line Items]
Operating revenues	$ 211,928	$ 200,426
Operating expenses	(104,842)	(99,076)
Other income, net	187	391
Interest expense, net	(35,418)	(32,910)
Earnings before members' income taxes	$ 71,855	$ 68,831