CONSOLIDATED STATEMENTS OF OPERATIONS (Unaudited) (Parenthetical) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Rental and other property revenues	$ 11,918	$ 11,929
Property operating expenses	6,309	5,997
General and administrative	2,521	2,203
Interest income	4,527	4,558
Mortgage and loan interest	7,967	7,959
Related Party [Member]
Rental and other property revenues	221	113
Property operating expenses	242	257
General and administrative	1,055	1,500
Interest income	3,839	4,285
Mortgage and loan interest	$ 444	$ 490