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Real Property (Components Of Other Income, Net) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Business Acquisition [Line Items]
Other income, net	$ 190	$ 263
Buildings [Member] | Austin, Texas [Member]
Business Acquisition [Line Items]
Lease revenue	557	573
Property operating expenses	(367)	(310)
Other income, net	$ 190	$ 263

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