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
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