Quarterly report pursuant to Section 13 or 15(d)

Fair Value Measurements - Additional Information (Detail)

v3.4.0.3
Fair Value Measurements - Additional Information (Detail)
3 Months Ended
Mar. 31, 2016
Facility
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]  
Number of storage facilities acquired 25
Storage Facilities [Member]  
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]  
Number of storage facilities acquired 25