Prepaid Expenses and Other Current Assets and Other Assets (Schedule of Prepaid Expense and Other Current Assets) (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Prepaid Expenses and Other Current Assets and Other Assets [Abstract]
Prepaid real estate taxes	$ 4,562	$ 3,153
Prepaid taxes	10,146	8,121
Other current assets	20,602	12,601
Total prepaid expenses and other current assets	$ 35,310	$ 23,875