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INVESTMENT ACTIVITY (Details) |  |  | 3 Months Ended | 6 Months Ended | 12 Months Ended |  |
--- | --- | --- | --- | --- | --- | --- | ---
Mar. 18, 2015 USD ($) facility | Nov. 03, 2014 USD ($) facility | Jun. 30, 2015 USD ($) | Mar. 31, 2015 | Jun. 30, 2014 USD ($) | Jun. 30, 2015 USD ($) facility property | Jun. 30, 2014 USD ($) | Dec. 31, 2014 USD ($) facility property | Dec. 31, 2008 | Mar. 31, 2014 USD ($) | Dec. 31, 2013 USD ($)
Self-storage facilities |  |  |  |  |  |  |  |  |  |  |
Development costs |  |  | $ 71,800,000 |  |  | $ 71,800,000 |  |  |  |  |
Storage facilities |  |  | 3,260,426,000 |  |  | 3,260,426,000 |  | $ 3,117,198,000 |  |  |
Number of facilities under contract |  |  |  |  |  | 5 |  |  |  |  |
Gain from sale of real estate |  |  |  |  | $ 475,000 |  | $ 475,000 |  |  |  |
Summary of the amounts of revenue and earnings of the 2014 and 2013 acquisitions since the acquisition dates |  |  |  |  |  |  |  |  |  |  |
Total revenue |  |  | 1,524,000 |  | 3,843,000 | 1,743,000 | 5,200,000 |  |  |  |
Net loss |  |  | (1,146,000) |  | $ (2,115,000) | $ (1,124,000) | $ (2,914,000) |  |  |  |
USIFB, LLP |  |  |  |  |  |  |  |  |  |  |
Self-storage facilities |  |  |  |  |  |  |  |  |  |  |
Ownership interest held by the entity (as a percent) |  |  |  |  |  |  |  |  | 97.00% |  |
5 Old Lancaster Road located in Malvern, PA |  |  |  |  |  |  |  |  |  |  |
Self-storage facilities |  |  |  |  |  |  |  |  |  |  |
Storage facilities |  |  |  |  |  |  |  |  |  |  | $ 25,100,000
Bronx, NY |  |  |  |  |  |  |  |  |  |  |
Self-storage facilities |  |  |  |  |  |  |  |  |  |  |
Development costs |  |  |  |  |  |  |  |  |  | $ 17,200,000 |
Self-storage facilities located in Newyork |  |  |  |  |  |  |  |  |  |  |
Self-storage facilities |  |  |  |  |  |  |  |  |  |  |
Number of self-storage facilities | facility |  |  |  |  |  | 4 |  |  |  |  |
Self-storage Facility in Washington D C [Member] |  |  |  |  |  |  |  |  |  |  |
Self-storage facilities |  |  |  |  |  |  |  |  |  |  |
Number of self-storage facilities | facility |  |  |  |  |  | 1 |  |  |  |  |
Self-storage Facility in Arlington, VA [Member] |  |  |  |  |  |  |  |  |  |  |
Self-storage facilities |  |  |  |  |  |  |  |  |  |  |
Storage facilities |  |  | $ 17,100,000 |  |  | $ 17,100,000 |  |  |  |  |
Ownership interest held by the entity (as a percent) |  |  | 90.00% |  |  |  |  |  |  |  |
2015 Acquisitions |  |  |  |  |  |  |  |  |  |  |
Self-storage facilities |  |  |  |  |  |  |  |  |  |  |
Number of self-storage facilities acquired (in properties) | property |  |  |  |  |  | 11 |  |  |  |  |
Aggregate purchase or sale price |  |  | $ 92,965,000 |  |  | $ 92,965,000 |  |  |  |  |
2015 Acquisitions | HSRE |  |  |  |  |  |  |  |  |  |  |
Self-storage facilities |  |  |  |  |  |  |  |  |  |  |
Number of self-storage facilities | facility |  |  |  |  |  |  |  | 26 |  |  |
Number of self-storage facilities acquired (in properties) | facility | 4 |  |  |  |  |  |  | 22 |  |  |
Aggregate purchase or sale price |  |  |  |  |  |  |  | $ 223,000,000 |  |  |
Intangible value of the in-place leases |  |  | 2,700,000 |  |  | $ 2,700,000 |  |  |  |  |
Estimated life |  |  |  |  |  | 12 months |  |  |  |  |
Amortization expense |  |  |  |  |  | $ 700,000 |  |  |  |  |
Aggregate purchase price of facilities closed | $ 27,500,000 |  |  |  |  |  |  | $ 195,500,000 |  |  |
2015 Acquisitions | Self-storage facilities located in US |  |  |  |  |  |  |  |  |  |  |
Self-storage facilities |  |  |  |  |  |  |  |  |  |  |
Number of self-storage facilities acquired (in properties) | facility |  |  |  |  |  | 7 |  |  |  |  |
Aggregate purchase or sale price |  |  | 65,500,000 |  |  | $ 65,500,000 |  |  |  |  |
Intangible value of the in-place leases |  |  | 3,800,000 |  |  | $ 3,800,000 |  |  |  |  |
Estimated life |  |  |  |  |  | 12 months |  |  |  |  |
Amortization expense |  |  |  |  |  | $ 500,000 |  |  |  |  |
Number of properties, assumed mortgage | facility |  |  |  |  |  | 1 |  |  |  |  |
Assumed mortgage debt, at fair value |  |  | 2,700,000 |  |  | $ 2,700,000 |  |  |  |  |
Outstanding principal balance of mortgage debt assumed on acquisitions |  |  | 2,500,000 |  |  | 2,500,000 |  |  |  |  |
Premium on debt assumed on acquisitions |  |  | 200,000 |  |  | 200,000 |  |  |  |  |
2014 Acquisitions |  |  |  |  |  |  |  |  |  |  |
Self-storage facilities |  |  |  |  |  |  |  |  |  |  |
Number of self-storage facilities acquired (in properties) | property |  |  |  |  |  |  |  | 53 |  |  |
Aggregate purchase or sale price |  |  |  |  |  |  |  | $ 568,226,000 |  |  |
2014 Acquisitions | Self-storage facilities located in US |  |  |  |  |  |  |  |  |  |  |
Self-storage facilities |  |  |  |  |  |  |  |  |  |  |
Number of self-storage facilities acquired (in properties) | facility |  |  |  |  |  |  |  | 31 |  |  |
Aggregate purchase or sale price |  |  |  |  |  |  |  | $ 372,700,000 |  |  |
Intangible value of the in-place leases |  |  |  |  |  |  |  | $ 23,800,000 |  |  |
Estimated life |  |  |  |  |  |  |  | 12 months |  |  |
Amortization expense |  |  |  |  |  | 8,100,000 |  |  |  |  |
Number of properties, assumed mortgage | facility |  |  |  |  |  |  |  | 4 |  |  |
Assumed mortgage debt, at fair value |  |  |  |  |  |  |  | $ 27,500,000 |  |  |
Outstanding principal balance of mortgage debt assumed on acquisitions |  |  |  |  |  |  |  | 26,000,000 |  |  |
Premium on debt assumed on acquisitions |  |  |  |  |  |  |  | $ 1,500,000 |  |  |
2014 Acquisitions | Self-storage facilities located in US | HSRE |  |  |  |  |  |  |  |  |  |  |
Self-storage facilities |  |  |  |  |  |  |  |  |  |  |
Number of self-storage facilities acquired (in properties) | facility |  | 22 |  |  |  |  |  |  |  |  |
Aggregate purchase or sale price |  | $ 195,500,000 |  |  |  |  |  |  |  |  |
Intangible value of the in-place leases |  | $ 14,500,000 |  |  |  |  |  |  |  |  |
Estimated life |  |  |  | 12 months |  |  |  |  |  |  |
Amortization expense |  |  |  |  |  | 7,200,000 |  |  |  |  |
Real Estate Acquisition Expected by 2016 |  |  |  |  |  |  |  |  |  |  |
Self-storage facilities |  |  |  |  |  |  |  |  |  |  |
Deposit |  |  | 5,100,000 |  |  | 5,100,000 |  |  |  |  |
Number of facilities under contract |  |  |  |  |  | 4 |  |  |  |  |
Expected aggregate purchase or sales price |  |  | 90,200,000 |  |  | 90,200,000 |  |  |  |  |
Note receivable |  |  | 4,100,000 |  |  | $ 4,100,000 |  |  |  |  |
Self-storage facilities |  |  |  |  |  |  |  |  |  |  |
Self-storage facilities |  |  |  |  |  |  |  |  |  |  |
Number of self-storage facilities acquired (in properties) | property |  |  |  |  |  | 11 |  | 53 |  |  |
Aggregate purchase or sale price |  |  | $ 93,000,000 |  |  | $ 93,000,000 |  | $ 568,200,000 |  |  |

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- References No definition available. + Details
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- Definition This element represents the amount of revenue of the acquiree since the acquisition date included in the consolidated income statement for the reporting period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1) -URI http://asc.fasb.org/extlink&oid=25497992&loc=d3e1392-128463 + Details
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