Subsequent Events - Additional Information (Details) $ in Thousands			12 Months Ended
	Feb. 04, 2019 USD ($) Property	Jan. 25, 2019 USD ($) Property	Dec. 31, 2018 USD ($) Property	Dec. 31, 2017 USD ($) Property	Dec. 31, 2016 USD ($) Property
Subsequent Event [Line Items]
Number of industrial properties			458
Acquisition Activity
Subsequent Event [Line Items]
Number of industrial properties			10	8	6
Purchase price of industrial properties acquired | $			$ 167,546	$ 174,209	$ 111,130
Subsequent Events | Acquisition Activity
Subsequent Event [Line Items]
Number of Land Parcels		1
Number of industrial properties	1
Purchase price of industrial properties acquired | $	$ 12,258	$ 1,760