Commitments And Contingencies (Schedule Of Rent Expense Under Operating Leases) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Commitments And Contingencies [Abstract]
Long Term Purchase Agreement	$ 5,559	$ 5,867	$ 5,931
Purchased water under long-term agreements	1,061	1,017	1,006
Water treatment expense under contractual agreement	$ 601,995	$ 340,262	$ 165,745