Commitments and Contingencies - Additional Information (Details) $ in Thousands, ft² in Millions	Sep. 30, 2020 USD ($) ft² Property
Other Commitments [Line Items]
Number of industrial properties | Property	439
Gross leasable area (GLA) of industrial properties | ft²	63.0
Development Activity
Other Commitments [Line Items]
Number of industrial properties | Property	6
Gross leasable area (GLA) of industrial properties | ft²	1.1
Estimated total investment | $	$ 104,900
Estimated total investment remaining to be funded | $	$ 48,000