Discontinued Operations - Schedule of Results of Operations Related to Discontinued Operations (Details) - USD ($) $ in Thousands		3 Months Ended	6 Months Ended
		Jun. 30, 2020	Jun. 30, 2020
Expenses:
Income from discontinued operations, net		$ 2,147	$ 3,668
1899 Pennsylvania Avenue [Member]
Revenues:
Rental revenue	[1]	3,515	7,078
Other income	[1]	31	130
Total revenues	[1]	3,546	7,208
Expenses:
Operating	[1]	1,399	2,850
Depreciation and amortization	[1]		690
Total expenses	[1]	1,399	3,540
Income from discontinued operations, net	[1]	$ 2,147	$ 3,668

[1] Represents revenues, expenses, net income and cash flow information of 1899 Pennsylvania Avenue, which was sold on December 24, 2020.