Investments in Real Estate - Purchase Price Allocation (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Asset Acquisition
Land	$ 3,311	$ 1,084
Building and improvements	13,449	10,280
In place leases	1,927	662
Below market leases	(95)	(139)
Above market leases	(160)	0
Net assets acquired	18,752	11,887
Other, net	74	447
Aggregate purchase price	$ 18,826	$ 12,334