Quarterly report pursuant to Section 13 or 15(d)

ORGANIZATION AND NATURE OF OPERATIONS (Details)

v3.22.1
ORGANIZATION AND NATURE OF OPERATIONS (Details)
storage_unit in Thousands, ft² in Millions
 3 Months Ended
Mar. 31, 2022
ft²
storage_unit
property
state
metropolitan_statistical_area
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 1,061
Number of states in which self storage properties are located | state 42
Total rentable square feet in self storage properties | ft² 68.4
Number of storage units | storage_unit 537
Self storage properties 510
Self storage properties, remaining 374
2016 Joint Venture  
Schedule of Equity Method Investments [Line Items]  
Company's equity interest in unconsolidated real estate ventures (percent) 25.00%
2018 Joint Venture  
Schedule of Equity Method Investments [Line Items]  
Company's equity interest in unconsolidated real estate ventures (percent) 25.00%
Consolidated properties  
Schedule of Equity Method Investments [Line Items]  
Number of self storage properties 884
Number of states in which self storage properties are located | state 39
Total rentable square feet in self storage properties | ft² 55.7
Number of storage units | storage_unit 433
Unconsolidated properties | Joint venture | Unconsolidated real estate ventures  
Schedule of Equity Method Investments [Line Items]  
Number of self storage properties 177
Number of states in which self storage properties are located | state 21
Total rentable square feet in self storage properties | ft² 12.7
Number of storage units | storage_unit 104
Unconsolidated properties | Joint venture | 2016 Joint Venture  
Schedule of Equity Method Investments [Line Items]  
Number of self storage properties 74
Number of states in which self storage properties are located | state 13
Total rentable square feet in self storage properties | ft² 4.9
Number of storage units | storage_unit 40
Unconsolidated properties | Joint venture | 2018 Joint Venture  
Schedule of Equity Method Investments [Line Items]  
Number of self storage properties 103
Number of states in which self storage properties are located | state 17
Total rentable square feet in self storage properties | ft² 7.8
Number of storage units | storage_unit 64