Schedule IV - Mortgage Loans on Real Estate (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2019
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Abstract]
Face Amount of Mortgages				$ 0
Carrying amount of mortgages	$ 0	$ 0	$ 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	1,250
New mortgage loans	3,100	0	0
Deductions during the year:
Collections of principal	(3,100)	0	(1,250)
Foreclosures	0	0	0
Balance at the close of year	$ 0	$ 0	$ 0