Real Estate Assets - Additional Information (Details) - ft²	1 Months Ended	3 Months Ended	6 Months Ended
	Feb. 29, 2020	Sep. 30, 2020	Jun. 30, 2020
McCordsville, IN
Real Estate Properties [Line Items]
Gross square feet of traditional drive-up storage units and all-climate-controlled units			13,713
McCordsville, IN | Scenario Forecast
Real Estate Properties [Line Items]
Number of leasable unit		7,300
Millbrook, NY
Real Estate Properties [Line Items]
Gross square feet of traditional drive-up storage units and all-climate-controlled units	11,800