Quarterly report pursuant to Section 13 or 15(d)

SELF STORAGE PROPERTIES (Details)

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SELF STORAGE PROPERTIES (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2018
Mar. 31, 2017
Dec. 31, 2017
Real Estate [Abstract]      
Land $ 550,025   $ 528,304
Buildings and improvements 1,855,728   1,741,459
Furniture and equipment 5,700   5,470
Total self storage properties 2,411,453   2,275,233
Less accumulated depreciation (188,407)   (170,358)
Self storage properties, net 2,223,046   $ 2,104,875
Depreciation expense related to self storage properties $ 18,000 $ 14,100