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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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