PRO FORMA FINANCIAL INFORMATION (Details) $ / shares in Units, $ in Thousands |
3 Months Ended | 9 Months Ended | 12 Months Ended | |||
|---|---|---|---|---|---|---|
|
Sep. 30, 2017
$ / shares
|
Dec. 31, 2016
USD ($)
|
Sep. 30, 2016
$ / shares
|
Sep. 30, 2017
USD ($)
property
$ / shares
|
Sep. 30, 2016
USD ($)
$ / shares
|
Dec. 31, 2016
property
|
|
| Consolidated results of operations on a pro forma basis | ||||||
| Pro forma revenue | $ | $ 416,145 | $ 389,108 | ||||
| Pro forma income | $ | $ 105,736 | $ 84,530 | ||||
| Earnings per share from continuing operations: | ||||||
| Basic - as reported (in dollars per share) | $ 0.21 | $ 0.13 | $ 0.53 | $ 0.32 | ||
| Diluted - as reported (in dollars per share) | $ 0.21 | $ 0.13 | 0.52 | 0.32 | ||
| Basic - as pro forma (in dollars per share) | 0.58 | 0.45 | ||||
| Diluted - as pro forma (in dollars per share) | $ 0.58 | $ 0.45 | ||||
| Self-storage facilities | ||||||
| Self-storage facilities | ||||||
| Number of self-storage facilities acquired | property | 3 | 28 | ||||
| Aggregate purchase price | $ | $ 403,600 | $ 33,100 | ||||