Schedule IV - Mortgage Loans on Real Estate (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Face Amount of Mortgages				$ 3,000
Carrying amount of mortgages	$ 0	$ 0	$ 0	2,626	$ 0	$ 0
Principal Amount of Loans Subject to Delinquent Principal or Interest				0
SEC Schedule, 12-29, Real Estate Companies, Investment in Movement in Mortgage Loans on Real Estate [Roll Forward]
Balance at beginning of year	0	0	0
New mortgage loans	3,000	3,100	0
Deductions during the year:
Collections of principal	(374)	(3,100)	0
Foreclosures	0	0	0
Balance at the close of year	2,626	0	0
Mortgages held, federal income tax basis				$ 2,626	$ 0	$ 0
Mortgages accepted in connection with real estate transactions	3,000	$ 3,100	$ 0
2 properties in VA
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Interest Rate				7.00%
Face Amount of Mortgages				$ 3,000
Carrying amount of mortgages	2,626			2,626
Principal Amount of Loans Subject to Delinquent Principal or Interest				$ 0
Deductions during the year:
Balance at the close of year	$ 2,626