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Real Property (Components Of Other Income, Net) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Business Acquisition [Line Items]
Other income, net	$ 203	$ 275	$ 393	$ 538
Buildings [Member] | Austin, Texas [Member]
Business Acquisition [Line Items]
Lease revenue	559	586	1,116	1,160
Property operating expenses	(356)	(311)	(723)	(622)
Other income, net	$ 203	$ 275	$ 393	$ 538

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