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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
Sep. 30, 2023
Dec. 31, 2022
Prepaid Expenses and Other Current Assets and Other Assets [Abstract]    
Short-term investments $ 1,141 $ 1,331
Prepaid real estate taxes 4,707 3,333
Interest receivable 4,213 529
Prepaid taxes 10,426 10,639
Prepaid ground rent 4,213 3,867
Other current assets 20,850 13,450
Total prepaid expenses and other current assets $ 45,550 $ 33,149