Properties And Equipment (Summary Of Investment And Development Property) (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Property, Plant and Equipment [Line Items]
Investment and development property	$ 8,694	$ 8,792
Land [Member]
Property, Plant and Equipment [Line Items]
Investment and development property	3,814	3,857
Construction-In-Progress (Including Capitalized Interest) [Member]
Property, Plant and Equipment [Line Items]
Investment and development property	$ 4,880	$ 4,935