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Prepaid Expenses and Other Current Assets and Other Assets (Schedule of Prepaid Expense and Other Current Assets) (Details) - USD ($) $ in Thousands | Jun. 30, 2023 | Dec. 31, 2022
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Prepaid Expenses and Other Current Assets and Other Assets [Abstract] |  |
Short-term investments | $ 22,379 | $ 1,331
Prepaid real estate taxes | 2,195 | 3,333
Prepaid taxes | 13,348 | 10,639
Prepaid ground rent | 3,178 | 3,867
Other current assets | 23,814 | 13,979
Total prepaid expenses and other current assets | $ 64,914 | $ 33,149

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