Quarterly report pursuant to Section 13 or 15(d)

Commitment and Contingencies - Additional Information (Detail)

v3.10.0.1
Commitment and Contingencies - Additional Information (Detail)
$ in Thousands
9 Months Ended
Nov. 01, 2018
USD ($)
Property
Sep. 30, 2018
USD ($)
Property
Commitment And Contingencies [Line Items]    
Number of storage facilities to be acquired | Property   3
Aggregate purchase price of business to be acquired   $ 29,300
Number of storage facilities acquired | Property   2
Aggregate purchase price   $ 19,409
New Jersey [Member] | Class Action [Member]    
Commitment And Contingencies [Line Items]    
Settlement agreement, amount   8,000
Remaining settlement, amount   $ 200
Subsequent Event [Member]    
Commitment And Contingencies [Line Items]    
Number of storage facilities to be acquired | Property 2  
Aggregate purchase price of business to be acquired $ 19,200  
Subsequent Event [Member] | Date of Acquisition, Subsequent to 9/30/2018 [Member]    
Commitment And Contingencies [Line Items]    
Number of storage facilities acquired | Property 2  
Aggregate purchase price $ 22,100