Investments (Cost And Estimated Fair Value Of Investments) (Details) - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023
Schedule of Available-for-sale Securities [Line Items]
Cost	$ 54	$ 54
Gross unrealized gain	2	2
Gross unrealized loss	0	0
Fair value	56	56
Equity Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Cost	54	54
Gross unrealized gain	2	2
Gross unrealized loss	0	0
Fair value	$ 56	$ 56