Quarterly report pursuant to Section 13 or 15(d)

SELF STORAGE PROPERTY ACQUISITIONS - Pro Forma Information (Details)

v3.5.0.2
SELF STORAGE PROPERTY ACQUISITIONS - Pro Forma Information (Details)
$ in Thousands
1 Months Ended 3 Months Ended 6 Months Ended
Aug. 09, 2016
property
Jun. 30, 2016
USD ($)
property
Mar. 31, 2016
property
Jun. 30, 2015
USD ($)
property
Mar. 31, 2015
property
Jun. 30, 2016
USD ($)
property
Jun. 30, 2015
USD ($)
Dec. 31, 2015
Business Acquisition, Pro Forma Information, Nonrecurring Adjustment [Line Items]                
Pro forma revenue   $ 52,055   $ 43,143   $ 101,908 $ 84,651  
Pro forma net income (loss)   $ 7,822   $ (383)   $ 16,683 (5,087)  
Number of self storage properties acquired | property   25 17 21 6 42    
Number of businesses acquired for which pro forma financial information is available | property     15          
Number of businesses acquired for which pro forma financial information is not available | property     2          
Acquisition costs   $ 1,708   $ 719   $ 2,996 1,318  
Subsequent Acquisitions [Member]                
Business Acquisition, Pro Forma Information, Nonrecurring Adjustment [Line Items]                
Pro forma revenue   4,193   3,762   8,239 7,514  
Pro forma net income (loss)   414   (1,118)   747 (2,250)  
May To June 2016 Acquisitions [Member]                
Business Acquisition, Pro Forma Information, Nonrecurring Adjustment [Line Items]                
Pro forma revenue   578   4,939   5,894 9,738  
Pro forma net income (loss)   1,363   (695)   3,497 (1,567)  
January To March 2016 Acquisitions [Member]                
Business Acquisition, Pro Forma Information, Nonrecurring Adjustment [Line Items]                
Pro forma revenue   0   1,831   842 3,590  
Pro forma net income (loss)   0   (384)   $ 1,592 (2,092)  
Number of self storage properties acquired | property           17    
Number of businesses acquired for which pro forma financial information is available | property           15    
Number of businesses acquired for which pro forma financial information is not available | property           2    
April To May 2015 Acquisitions [Member]                
Business Acquisition, Pro Forma Information, Nonrecurring Adjustment [Line Items]                
Pro forma revenue   0   961   $ 0 3,782  
Pro forma net income (loss)   0   1,404   0 2,292  
January To March 2015 Acquisitions [Member]                
Business Acquisition, Pro Forma Information, Nonrecurring Adjustment [Line Items]                
Pro forma revenue   0   0   0 86  
Pro forma net income (loss)   0   317   0 1,208  
Consolidated Entities Excluding Acquirees [Member]                
Business Acquisition, Pro Forma Information, Nonrecurring Adjustment [Line Items]                
Pro forma revenue   47,284   31,650   86,933 59,941  
Pro forma net income (loss)   $ 6,045   $ 93   $ 10,847 $ (2,678)  
Credit Facility [Member] | Line of Credit [Member] | Revolving line of credit [Member]                
Business Acquisition, Pro Forma Information, Nonrecurring Adjustment [Line Items]                
Effective interest rate   1.87%       1.87%   1.87%
Subsequent Event [Member] | Subsequent Acquisitions [Member]                
Business Acquisition, Pro Forma Information, Nonrecurring Adjustment [Line Items]                
Number of self storage properties acquired | property 26