Quarterly report pursuant to Section 13 or 15(d)

SUBSEQUENT EVENTS (Details)

v3.2.0.727
SUBSEQUENT EVENTS (Details)
shares in Thousands, $ in Thousands
 1 Months Ended 2 Months Ended 3 Months Ended 6 Months Ended
Jan. 01, 2015
property
Aug. 11, 2015
USD ($)
property
shares
Jan. 31, 2015
property
May. 31, 2015
property
Jun. 30, 2015
USD ($)
property
Mar. 31, 2015
USD ($)
property
Jun. 30, 2015
USD ($)
property
Jun. 30, 2014
USD ($)
Subsequent Event [Line Items]                
Number of self storage properties acquired | property 5   6 21 21 6 27  
Aggregate purchase price         $ 95,083 $ 34,235 $ 129,318  
Consideration given, cash             47,523 $ 89,856
Consideration given, value of OP Equity         22,971 $ 8,954 31,925  
Business combination, noncontrolling interest, fair value         $ 6,800   $ 6,800  
Participating Regional Operator [Member] | Affiliated Entity [Member]                
Subsequent Event [Line Items]                
Number of self storage properties acquired | property             10  
Unidentified Third Parties [Member]                
Subsequent Event [Line Items]                
Number of self storage properties acquired | property             17  
Subsequent Event [Member] | Series of Individually Immaterial Business Acquisitions [Member]                
Subsequent Event [Line Items]                
Number of self storage properties acquired | property   12            
Aggregate purchase price   $ 94,000            
Consideration given, cash   78,000            
Consideration given, value of OP Equity   8,000            
Business combination, noncontrolling interest, fair value   $ 8,300            
Subsequent Event [Member] | Series of Individually Immaterial Business Acquisitions [Member] | OP units [Member]                
Subsequent Event [Line Items]                
Equity interest issued (in units) | shares   660            
Subsequent Event [Member] | Participating Regional Operator [Member] | Series of Individually Immaterial Business Acquisitions [Member] | Affiliated Entity [Member]                
Subsequent Event [Line Items]                
Number of self storage properties acquired | property   1            
Subsequent Event [Member] | Unidentified Third Parties [Member] | Series of Individually Immaterial Business Acquisitions [Member]                
Subsequent Event [Line Items]                
Number of self storage properties acquired | property   11