Quarterly report pursuant to Section 13 or 15(d)

Subsequent Events - Additional Information (Detail)

v3.10.0.1
Subsequent Events - Additional Information (Detail)
$ / shares in Units, $ in Millions
9 Months Ended
Nov. 01, 2018
USD ($)
Property
Oct. 26, 2018
USD ($)
Oct. 02, 2018
$ / shares
Sep. 30, 2018
USD ($)
Property
Subsequent Event [Line Items]        
Number of storage facilities to be acquired | Property       3
Aggregate purchase price of business to be acquired       $ 29.3
Subsequent Event [Member]        
Subsequent Event [Line Items]        
Dividend declared, date     Oct. 02, 2018  
Dividend per common share | $ / shares     $ 1.00  
Dividend paid, date     Oct. 26, 2018  
Dividend record, date     Oct. 16, 2018  
Dividend paid   $ 46.6    
Number of storage facilities to be acquired | Property 2      
Aggregate purchase price of business to be acquired $ 19.2