Annual report pursuant to Section 13 and 15(d)

Schedule III - Reconciliation (Details)

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Schedule III - Reconciliation (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Self Storage properties:      
Balance at beginning of year $ 1,147,201 $ 838,941 $ 370,698
Acquisitions and improvements 715,509 308,323 470,060
Write-off of fully depreciated assets and other 0 (63) 0
Dispositions (4,820) 0 (1,817)
Assets held for sale (13,554) 0 0
Balance at end of year 1,844,336 1,147,201 838,941
Accumulated depreciation:      
Balance at beginning of year 68,100 39,614 24,379
Depreciation expense 42,703 28,549 15,508
Write-off of fully depreciated assets and other 0 (63) 0
Dispositions 0 0 (273)
Balance at end of year $ 110,803 $ 68,100 $ 39,614