Annual report pursuant to Section 13 and 15(d)

SUBSEQUENT EVENTS - New PRO (Details)

v3.10.0.1
SUBSEQUENT EVENTS - New PRO (Details)
Feb. 25, 2019
property
Dec. 31, 2018
property
Subsequent Event [Line Items]    
Number of self storage properties   675
Subsequent Event [Member]    
Subsequent Event [Line Items]    
Number of PROs 10  
Moove in Self Storage, LLC [Member] | Subsequent Event [Member]    
Subsequent Event [Line Items]    
Number of self storage properties 19  
Number of self storage properties, initial PRO portfolio 6