Subsequent Events - Schedule of Purchases (Details) - Subsequent Event - USD ($) $ in Millions	Nov. 02, 2021	Oct. 21, 2021	Oct. 14, 2021	Oct. 06, 2021	Oct. 01, 2021
735 Watkins Mill
Subsequent Event [Line Items]
Ownership Percentage					50.00%
Net Purchase Price					$ 5.9
Storage Portfolio IV
Subsequent Event [Line Items]
Ownership Percentage				90.00%
Net Purchase Price				$ 17.3
Weston Business Center - Building E&F
Subsequent Event [Line Items]
Ownership Percentage			100.00%
Net Purchase Price			$ 110.0
Dry Creek
Subsequent Event [Line Items]
Ownership Percentage	90.00%	50.00%
Net Purchase Price	$ 11.8	$ 11.5