Commitments and Contingencies - Narrative (Details) ft² in Thousands, $ in Millions	May 05, 2020 USD ($) ft² property	May 06, 2020 ft² property	Mar. 31, 2020 a ft² property
Third-party seller
Other Commitments [Line Items]
Number of properties			1
Area of real estate property | ft²			13
Industrial building | Third-party seller | Subsequent event
Other Commitments [Line Items]
Number of properties		1
Area of real estate property | ft²		13
Industrial building | Third-party seller | Subsequent event | Washington D.C.
Other Commitments [Line Items]
Number of properties	3
Area of real estate property | ft²	340
Sales price of property currently for sale | $	$ 54
Improved land parcels
Other Commitments [Line Items]
Number of properties			21
Area of real estate property | a			82.2