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, 2018
Dec. 31, 2017
Dec. 31, 2016
Self Storage properties:      
Balance at beginning of year $ 2,275,233 $ 1,844,336 $ 1,147,201
Acquisitions and improvements 366,522 431,542 715,509
Reclassifications from assets for sale 0 8,607 0
Write-off of fully depreciated assets and other (323) (50) 0
Dispositions (3,709) (7,336) (4,820)
Reclassification to assets held for sale 0 (1,866) (13,554)
Balance at end of year 2,637,723 2,275,233 1,844,336
Accumulated depreciation:      
Balance at beginning of year 170,358 110,803 68,100
Depreciation expense 76,299 60,522 42,703
Write-off of fully depreciated assets and other 0 (10) 0
Dispositions (396) (646) 0
Assets held for sale 0 (311) 0
Balance at end of year $ 246,261 $ 170,358 $ 110,803