Quarterly report pursuant to Section 13 or 15(d)

Mortgages Payable and Debt Maturities - Summary of Mortgage Payable (Parenthetical) (Detail)

v3.4.0.3
Mortgages Payable and Debt Maturities - Summary of Mortgage Payable (Parenthetical) (Detail) - 5.99% Mortgage Notes Due May 1, 2026 [Member]
$ in Millions
3 Months Ended
Mar. 31, 2016
USD ($)
Facility
Debt Instrument [Line Items]  
Interest rate 5.99%
Mortgage note due date May 01, 2026
Self-storage facilities | Facility 1
Aggregate net book value of property pledged for mortgage note | $ $ 4.3
Effective interest rate 6.24%