Quarterly report pursuant to Section 13 or 15(d)

ORGANIZATION AND NATURE OF OPERATIONS (Details)

v3.23.2
ORGANIZATION AND NATURE OF OPERATIONS (Details)
storage_unit in Thousands, ft² in Millions
 6 Months Ended
Jun. 30, 2023
ft²
storage_unit
property
state
metropolitan_statistical_area
Jan. 01, 2023
property
Schedule of Equity Method Investments [Line Items]    
Number of top metropolitan statistical areas for focus of operations | metropolitan_statistical_area 100  
Number of self storage properties 1,117  
Number of states in which self storage properties are located | state 42  
Total rentable square feet in self storage properties | ft² 72.8  
Number of storage units | storage_unit 573  
Self storage properties 603  
Self storage properties, remaining 329  
2018 Joint Venture    
Schedule of Equity Method Investments [Line Items]    
Company's equity interest in unconsolidated real estate ventures (percent) 25.00%  
2016 Joint Venture    
Schedule of Equity Method Investments [Line Items]    
Company's equity interest in unconsolidated real estate ventures (percent) 25.00%  
Joint venture    
Schedule of Equity Method Investments [Line Items]    
Number of self storage properties   72
Consolidated properties    
Schedule of Equity Method Investments [Line Items]    
Number of self storage properties 932  
Number of states in which self storage properties are located | state 39  
Total rentable square feet in self storage properties | ft² 59.4  
Number of storage units | storage_unit 462  
Unconsolidated properties | Joint venture    
Schedule of Equity Method Investments [Line Items]    
Number of self storage properties 185  
Number of states in which self storage properties are located | state 21  
Total rentable square feet in self storage properties | ft² 13.5  
Number of storage units | storage_unit 111