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STORAGE PROPERTIES - Activity (Details) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2017 USD ($) property facility | Dec. 31, 2016 USD ($) facility | Dec. 31, 2015 USD ($) facility
2017 Acquisitions |  |  |
STORAGE FACILITIES |  |  |
Number of Facilities, acquisitions (in properties) | facility | 7 |  |
Purchase Price | $ 80,650 |  |
2017 Acquisitions | Illinois Asset April 2017 |  |  |
STORAGE FACILITIES |  |  |
Number of Facilities, acquisitions (in properties) | facility | 1 |  |
Purchase Price | $ 11,200 |  |
2017 Acquisitions | Maryland Asset May 2017 |  |  |
STORAGE FACILITIES |  |  |
Number of Facilities, acquisitions (in properties) | facility | 1 |  |
Purchase Price | $ 18,200 |  |
2017 Acquisitions | California Asset May 2017 |  |  |
STORAGE FACILITIES |  |  |
Number of Facilities, acquisitions (in properties) | facility | 1 |  |
Purchase Price | $ 3,650 |  |
2017 Acquisitions | Texas Asset October 2017 |  |  |
STORAGE FACILITIES |  |  |
Number of Facilities, acquisitions (in properties) | facility | 1 |  |
Purchase Price | $ 4,050 |  |
2017 Acquisitions | Florida Asset October 2017 |  |  |
STORAGE FACILITIES |  |  |
Number of Facilities, acquisitions (in properties) | facility | 1 |  |
Purchase Price | $ 14,500 |  |
2017 Acquisitions | Illinois Asset November 2017 |  |  |
STORAGE FACILITIES |  |  |
Number of Facilities, acquisitions (in properties) | facility | 1 |  |
Purchase Price | $ 11,300 |  |
2017 Acquisitions | Florida Asset December 2017 |  |  |
STORAGE FACILITIES |  |  |
Number of Facilities, acquisitions (in properties) | facility | 1 |  |
Purchase Price | $ 17,750 |  |
2016 Acquisitions |  |  |
STORAGE FACILITIES |  |  |
Number of Facilities, acquisitions (in properties) | 28 | 28 |
Purchase Price |  | $ 403,550 |
2016 Acquisitions | Metro DC Asset One |  |  |
STORAGE FACILITIES |  |  |
Number of Facilities, acquisitions (in properties) | facility |  | 1 |
Purchase Price |  | $ 21,000 |
2016 Acquisitions | Texas Asset Nineteen |  |  |
STORAGE FACILITIES |  |  |
Number of Facilities, acquisitions (in properties) | facility |  | 2 |
Purchase Price |  | $ 24,800 |
2016 Acquisitions | New York Asset Four |  |  |
STORAGE FACILITIES |  |  |
Number of Facilities, acquisitions (in properties) | facility |  | 1 |
Purchase Price |  | $ 48,500 |
2016 Acquisitions | Texas Asset Twenty |  |  |
STORAGE FACILITIES |  |  |
Number of Facilities, acquisitions (in properties) | facility |  | 1 |
Purchase Price |  | $ 11,600 |
2016 Acquisitions | Connecticut Asset |  |  |
STORAGE FACILITIES |  |  |
Number of Facilities, acquisitions (in properties) | facility |  | 1 |
Purchase Price |  | $ 19,000 |
2016 Acquisitions | Texas Asset Twenty-one |  |  |
STORAGE FACILITIES |  |  |
Number of Facilities, acquisitions (in properties) | facility |  | 1 |
Purchase Price |  | $ 11,600 |
2016 Acquisitions | Florida Assets Thirteen |  |  |
STORAGE FACILITIES |  |  |
Number of Facilities, acquisitions (in properties) | facility |  | 3 |
Purchase Price |  | $ 47,925 |
2016 Acquisitions | Colorado Asset Two |  |  |
STORAGE FACILITIES |  |  |
Number of Facilities, acquisitions (in properties) | facility |  | 1 |
Purchase Price |  | $ 11,350 |
2016 Acquisitions | Texas Asset Twenty-Two |  |  |
STORAGE FACILITIES |  |  |
Number of Facilities, acquisitions (in properties) | facility |  | 1 |
Purchase Price |  | $ 11,600 |
2016 Acquisitions | Texas Asset Twenty-Three |  |  |
STORAGE FACILITIES |  |  |
Number of Facilities, acquisitions (in properties) | facility |  | 1 |
Purchase Price |  | $ 10,100 |
2016 Acquisitions | Texas Asset Twenty-Four |  |  |
STORAGE FACILITIES |  |  |
Number of Facilities, acquisitions (in properties) | facility |  | 1 |
Purchase Price |  | $ 10,800 |
2016 Acquisitions | Illinois Asset Two |  |  |
STORAGE FACILITIES |  |  |
Number of Facilities, acquisitions (in properties) | facility |  | 1 |
Purchase Price |  | $ 12,350 |
2016 Acquisitions | Illinois Asset Three |  |  |
STORAGE FACILITIES |  |  |
Number of Facilities, acquisitions (in properties) | facility |  | 1 |
Purchase Price |  | $ 16,000 |
2016 Acquisitions | Massachusetts Asset Three |  |  |
STORAGE FACILITIES |  |  |
Number of Facilities, acquisitions (in properties) | facility |  | 1 |
Purchase Price |  | $ 14,300 |
2016 Acquisitions | Nevada Asset |  |  |
STORAGE FACILITIES |  |  |
Number of Facilities, acquisitions (in properties) | facility |  | 2 |
Purchase Price |  | $ 23,200 |
2016 Acquisitions | Arizona Asset Seven |  |  |
STORAGE FACILITIES |  |  |
Number of Facilities, acquisitions (in properties) | facility |  | 1 |
Purchase Price |  | $ 14,525 |
2016 Acquisitions | Minnesota Asset |  |  |
STORAGE FACILITIES |  |  |
Number of Facilities, acquisitions (in properties) | facility |  | 1 |
Purchase Price |  | $ 15,150 |
2016 Acquisitions | Colorado Asset |  |  |
STORAGE FACILITIES |  |  |
Number of Facilities, acquisitions (in properties) | facility |  | 1 |
Purchase Price |  | $ 15,600 |
2016 Acquisitions | Texas Asset Twenty-Five |  |  |
STORAGE FACILITIES |  |  |
Number of Facilities, acquisitions (in properties) | facility |  | 1 |
Purchase Price |  | $ 6,100 |
2016 Acquisitions | Texas Asset Twenty Six |  |  |
STORAGE FACILITIES |  |  |
Number of Facilities, acquisitions (in properties) | facility |  | 1 |
Purchase Price |  | $ 5,300 |
2016 Acquisitions | Nevada Asset Two |  |  |
STORAGE FACILITIES |  |  |
Number of Facilities, acquisitions (in properties) | facility |  | 1 |
Purchase Price |  | $ 13,250 |
2016 Acquisitions | North Carolina Asset One |  |  |
STORAGE FACILITIES |  |  |
Number of Facilities, acquisitions (in properties) | facility |  | 1 |
Purchase Price |  | $ 10,600 |
2016 Acquisitions | Arizona Asset Eight |  |  |
STORAGE FACILITIES |  |  |
Number of Facilities, acquisitions (in properties) | facility |  | 1 |
Purchase Price |  | $ 14,000 |
2016 Acquisitions | Nevada Asset Three |  |  |
STORAGE FACILITIES |  |  |
Number of Facilities, acquisitions (in properties) | facility |  | 1 |
Purchase Price |  | $ 14,900 |
2015 Acquisitions |  |  |
STORAGE FACILITIES |  |  |
Number of Facilities, acquisitions (in properties) | facility |  |  | 29
Purchase Price |  |  | $ 292,362
2015 Acquisitions | Texas Asset Seventeen |  |  |
STORAGE FACILITIES |  |  |
Number of Facilities, acquisitions (in properties) | facility |  |  | 1
Purchase Price |  |  | $ 7,295
2015 Acquisitions | HSRE Assets Two |  |  |
STORAGE FACILITIES |  |  |
Number of Facilities, acquisitions (in properties) | facility |  |  | 4
Purchase Price |  |  | $ 27,500
2015 Acquisitions | Arizona Asset Five |  |  |
STORAGE FACILITIES |  |  |
Number of Facilities, acquisitions (in properties) | facility |  |  | 1
Purchase Price |  |  | $ 7,900
2015 Acquisitions | Tennessee Assets |  |  |
STORAGE FACILITIES |  |  |
Number of Facilities, acquisitions (in properties) | facility |  |  | 1
Purchase Price |  |  | $ 6,575
2015 Acquisitions | Texas Asset Eighteen |  |  |
STORAGE FACILITIES |  |  |
Number of Facilities, acquisitions (in properties) | facility |  |  | 1
Purchase Price |  |  | $ 15,795
2015 Acquisitions | Florida Assets Eleven |  |  |
STORAGE FACILITIES |  |  |
Number of Facilities, acquisitions (in properties) | facility |  |  | 1
Purchase Price |  |  | $ 7,300
2015 Acquisitions | Arizona Asset Six |  |  |
STORAGE FACILITIES |  |  |
Number of Facilities, acquisitions (in properties) | facility |  |  | 1
Purchase Price |  |  | $ 10,100
2015 Acquisitions | Florida Assets Twelve |  |  |
STORAGE FACILITIES |  |  |
Number of Facilities, acquisitions (in properties) | facility |  |  | 1
Purchase Price |  |  | $ 10,500
2015 Acquisitions | Texas Asset Eight |  |  |
STORAGE FACILITIES |  |  |
Number of Facilities, acquisitions (in properties) | facility |  |  | 1
Purchase Price |  |  | $ 14,200
2015 Acquisitions | Maryland Asset Three |  |  |
STORAGE FACILITIES |  |  |
Number of Facilities, acquisitions (in properties) | facility |  |  | 1
Purchase Price |  |  | $ 17,000
2015 Acquisitions | Maryland Asset Four |  |  |
STORAGE FACILITIES |  |  |
Number of Facilities, acquisitions (in properties) | facility |  |  | 1
Purchase Price |  |  | $ 19,200
2015 Acquisitions | New York/New Jersey Assets |  |  |
STORAGE FACILITIES |  |  |
Number of Facilities, acquisitions (in properties) | facility |  |  | 2
Purchase Price |  |  | $ 24,823
2015 Acquisitions | New Jersey Assets |  |  |
STORAGE FACILITIES |  |  |
Number of Facilities, acquisitions (in properties) | facility |  |  | 1
Purchase Price |  |  | $ 14,350
2015 Acquisitions | PSI Assets |  |  |
STORAGE FACILITIES |  |  |
Number of Facilities, acquisitions (in properties) | facility |  |  | 12
Purchase Price |  |  | $ 109,824
Dispositions |  |  |
STORAGE FACILITIES |  |  |
Number of Facilities, dispositions (in properties) | facility |  |  | 8
Sale Price |  |  | $ 37,800
Dispositions | Texas Asset One |  |  |
STORAGE FACILITIES |  |  |
Number of Facilities, dispositions (in properties) | facility |  |  | 7
Sale Price |  |  | $ 28,000
Dispositions | Florida Asset One |  |  |
STORAGE FACILITIES |  |  |
Number of Facilities, dispositions (in properties) | facility |  |  | 1
Sale Price |  |  | $ 9,800

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