Investment in Real Estate - Additional Information (Details) $ in Thousands, ft² in Millions	6 Months Ended
	Jun. 30, 2019 USD ($) ft² Property	Jun. 30, 2018 Property
Real Estate Properties [Line Items]
Number of industrial properties	462
Gross leasable area (GLA) of industrial properties | ft²	63.4
Acquisition Activity
Real Estate Properties [Line Items]
Number of industrial properties	4
Gross leasable area (GLA) of industrial properties | ft²	0.3
Number of Land Parcels	4
Disposition Activity
Real Estate Properties [Line Items]
Number of industrial properties	2
Gross leasable area (GLA) of industrial properties | ft²	0.1
Proceeds from sale of industrial properties | $	$ 12,091
Gain on sale of real estate | $	$ 889
Joint Venture | Acquisition Activity
Real Estate Properties [Line Items]
Number of Land Parcels	1
Joint Venture | Disposition Activity
Real Estate Properties [Line Items]
Number of Land Parcels	3	1