Quarterly report pursuant to Section 13 or 15(d)

ORGANIZATION AND NATURE OF OPERATIONS (Details)

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ORGANIZATION AND NATURE OF OPERATIONS (Details)
storage_unit in Thousands, ft² in Millions
Mar. 31, 2018
ft²
storage_unit
state
property
Organization, Consolidation and Presentation of Financial Statements [Abstract]  
Number of self storage properties owned | property 468
Number of states that self storage properties are owned in | state 26
Total rentable square feet in self storage properties | ft² 28.5
Number of storage units owned | storage_unit 227