INVESTMENT IN UNCONSOLIDATED REAL ESTATE VENTURE (Details) $ in Thousands | Sep. 05, 2018USD ($)facility | Aug. 15, 2018USD ($) | May 16, 2018USD ($) | Jan. 31, 2018USD ($) | Nov. 01, 2017USD ($) | Oct. 16, 2017USD ($) | Dec. 15, 2016USD ($)facility | Jun. 15, 2016USD ($)facility | Apr. 21, 2016USD ($)facility | Mar. 30, 2016USD ($)facility | Jan. 26, 2016USD ($)facility | Dec. 08, 2015USD ($)facility | May 01, 2014USD ($)property | Dec. 10, 2013USD ($)property | Sep. 30, 2018 | Mar. 31, 2019USD ($)facility | Mar. 31, 2018USD ($)facility | Dec. 31, 2015USD ($)facility | Dec. 31, 2018USD ($) | Mar. 31, 2016USD ($)facility |
Investment in Unconsolidated Real Estate Venture | | | | | | | | | | | | | | | | | | | | |
Investment in real estate entities | | | | | | | | | | | | | | | | $ 94,092 | | | $ 95,796 | |
Acquisitions of storage facilities | | | | | | | | | | | | | | | | 25,097 | $ 4,034 | | | |
Summary of results of operations of the real estate venture | | | | | | | | | | | | | | | | | | | | |
Company’s share of net income (loss) | | | | | | | | | | | | | | | | 261 | (184) | | | |
HVP and HHF | | | | | | | | | | | | | | | | | | | | |
Assets | | | | | | | | | | | | | | | | | | | | |
Storage facilities, net | | | | | | | | | | | | | | | | 733,440 | | | 741,209 | |
Other assets | | | | | | | | | | | | | | | | 17,321 | | | 16,042 | |
Total Assets | | | | | | | | | | | | | | | | 750,761 | | | 757,251 | |
Liabilities and equity | | | | | | | | | | | | | | | | | | | | |
Other liabilities | | | | | | | | | | | | | | | | 9,396 | | | 7,911 | |
Debt | | | | | | | | | | | | | | | | 413,955 | | | 413,848 | |
Equity | | | | | | | | | | | | | | | | | | | | |
CubeSmart | | | | | | | | | | | | | | | | 94,092 | | | 95,796 | |
Joint venture partner | | | | | | | | | | | | | | | | 233,318 | | | 239,696 | |
Total liabilities and equity | | | | | | | | | | | | | | | | 750,761 | | | $ 757,251 | |
Summary of results of operations of the real estate venture | | | | | | | | | | | | | | | | | | | | |
Total revenues | | | | | | | | | | | | | | | | 23,203 | 20,910 | | | |
Operating expenses | | | | | | | | | | | | | | | | 10,163 | 9,204 | | | |
Other expenses | | | | | | | | | | | | | | | | 142 | 194 | | | |
Interest expense, net | | | | | | | | | | | | | | | | 4,216 | 2,898 | | | |
Depreciation and amortization | | | | | | | | | | | | | | | | 9,506 | 9,449 | | | |
Net income (loss) | | | | | | | | | | | | | | | | (824) | (835) | | | |
Company’s share of net income (loss) | | | | | | | | | | | | | | | | $ 261 | $ (184) | | | |
HHFNE | LIBOR | | | | | | | | | | | | | | | | | | | | |
Investment in Unconsolidated Real Estate Venture | | | | | | | | | | | | | | | | | | | | |
Interest rate (as percentage) | | | | | | | 1.90% | | | | | | | | | | | | | |
HVP | | | | | | | | | | | | | | | | | | | | |
Investment in Unconsolidated Real Estate Venture | | | | | | | | | | | | | | | | | | | | |
Ownership interest in partnership (as a percent) | | | | | | | | | | | | | | | | | | 10.00% | | |
Number of self-storage facilities acquired | facility | | | | | | | | 1 | 5 | 30 | 1 | 30 | | | | 12 | 1 | | | |
Number of self-storage facilities acquired, assumed mortgage debt | facility | | | | | | | | | | | | | | | | | 6 | | | |
Acquisitions of storage facilities | | | | | | | | $ 7,000 | $ 36,100 | $ 112,800 | $ 5,700 | $ 193,700 | | | | $ 129,400 | $ 2,700 | | | |
Number of properties to be acquired under the contract | facility | | | | | | | | | | | | | | | | 11 | | 37 | | 31 |
Contract amount to purchase real estate | | | | | | | | | | | | | | | | | | $ 242,500 | | $ 115,500 |
Intangible value of the in-place leases | | | | | | | | | | | | | | | | | | $ 18,900 | | |
Assumed mortgage debt, at fair value | | | | | | | | | | | | | | | | | 25,300 | | | |
Outstanding principal balance of mortgage debt assumed on acquisitions | | | | | | | | | | | | | | | | | 23,700 | | | |
Premium on debt assumed on acquisitions | | | | | | | | | | | | | | | | | $ 1,600 | | | |
Interest on real estate venture debt | | | 1.70% | | | | | | | | | | | | | | | | | |
Principal amount of debt | | | $ 107,000 | | | | | | | | | | | | | | | | | |
Proceeds from debt | | $ 24,400 | $ 43,700 | | | | | | | | | | | | | | | | | |
Percentage of capital that is required to be contributed to fund the acquisition | | | | | | | | | | | | | | 50.00% | | | | | | |
HVP | Affiliated Real Estate Investment Transactions | | | | | | | | | | | | | | | | | | | | |
Investment in Unconsolidated Real Estate Venture | | | | | | | | | | | | | | | | | | | | |
Number of properties to be acquired under the contract | facility | | | | | | | | | | | | | | | | | | | | 4 |
Capital Storage Partners, LLC | | | | | | | | | | | | | | | | | | | | |
Investment in Unconsolidated Real Estate Venture | | | | | | | | | | | | | | | | | | | | |
Number of self-storage facilities acquired | facility | 22 | | | | | | | | | | | | | | | | | | | |
Arizona | HVP | | | | | | | | | | | | | | | | | | | | |
Investment in Unconsolidated Real Estate Venture | | | | | | | | | | | | | | | | | | | | |
Number of self-storage facilities acquired | facility | | | | | | | | | | | | | | | | 2 | | | | |
Maryland | HVP | | | | | | | | | | | | | | | | | | | | |
Investment in Unconsolidated Real Estate Venture | | | | | | | | | | | | | | | | | | | | |
Number of self-storage facilities acquired | facility | | | | | | | | | | | | | | | | 1 | | | | |
Michigan | HVP | | | | | | | | | | | | | | | | | | | | |
Investment in Unconsolidated Real Estate Venture | | | | | | | | | | | | | | | | | | | | |
Number of properties to be acquired under the contract | facility | | | | | | | | | | | | | | | | | | 17 | | |
Connecticut | HHFNE | | | | | | | | | | | | | | | | | | | | |
Investment in Unconsolidated Real Estate Venture | | | | | | | | | | | | | | | | | | | | |
Number of self-storage facilities acquired | facility | | | | | | | 3 | | | | | | | | | | | | | |
Massachusetts | HHFNE | | | | | | | | | | | | | | | | | | | | |
Investment in Unconsolidated Real Estate Venture | | | | | | | | | | | | | | | | | | | | |
Number of self-storage facilities acquired | facility | | | | | | | 6 | | | | | | | | | | | | | |
Massachusetts | HVP | | | | | | | | | | | | | | | | | | | | |
Investment in Unconsolidated Real Estate Venture | | | | | | | | | | | | | | | | | | | | |
Number of properties to be acquired under the contract | facility | | | | | | | | | | | | | | | | | | 7 | | |
Rhode Island | HHFNE | | | | | | | | | | | | | | | | | | | | |
Investment in Unconsolidated Real Estate Venture | | | | | | | | | | | | | | | | | | | | |
Number of self-storage facilities acquired | facility | | | | | | | 2 | | | | | | | | | | | | | |
Vermont | HHFNE | | | | | | | | | | | | | | | | | | | | |
Investment in Unconsolidated Real Estate Venture | | | | | | | | | | | | | | | | | | | | |
Number of self-storage facilities acquired | facility | | | | | | | 2 | | | | | | | | | | | | | |
Florida | HVP | | | | | | | | | | | | | | | | | | | | |
Investment in Unconsolidated Real Estate Venture | | | | | | | | | | | | | | | | | | | | |
Number of self-storage facilities acquired | facility | | | | | | | | | | | | | | | | (3) | | | | |
Number of properties to be acquired under the contract | facility | | | | | | | | | | | | | | | | | | 3 | | |
Florida | Capital Storage Partners, LLC | | | | | | | | | | | | | | | | | | | | |
Investment in Unconsolidated Real Estate Venture | | | | | | | | | | | | | | | | | | | | |
Number of self-storage facilities acquired | facility | 4 | | | | | | | | | | | | | | | | | | | |
Texas | | | | | | | | | | | | | | | | | | | | |
Investment in Unconsolidated Real Estate Venture | | | | | | | | | | | | | | | | | | | | |
Acquisitions of storage facilities | | | | | | $ 9,400 | | | | | | | | | | | | | | |
Cash paid for acquisition of remaining interest in real estate ventures | | | | $ 200 | | | | | | | | | | | | | | | | |
Texas | HVP | | | | | | | | | | | | | | | | | | | | |
Investment in Unconsolidated Real Estate Venture | | | | | | | | | | | | | | | | | | | | |
Ownership interest in partnership (as a percent) | | | | | 20.00% | | | | | | | | | | | | | | | |
Number of self-storage facilities acquired | facility | | | | | | | | | | | | | | | | 2 | | | | |
Texas | Capital Storage Partners, LLC | | | | | | | | | | | | | | | | | | | | |
Investment in Unconsolidated Real Estate Venture | | | | | | | | | | | | | | | | | | | | |
Number of self-storage facilities acquired | facility | 13 | | | | | | | | | | | | | | | | | | | |
Oklahoma | Capital Storage Partners, LLC | | | | | | | | | | | | | | | | | | | | |
Investment in Unconsolidated Real Estate Venture | | | | | | | | | | | | | | | | | | | | |
Number of self-storage facilities acquired | facility | 5 | | | | | | | | | | | | | | | | | | | |
South Carolina | HVP | | | | | | | | | | | | | | | | | | | | |
Investment in Unconsolidated Real Estate Venture | | | | | | | | | | | | | | | | | | | | |
Number of properties to be acquired under the contract | facility | | | | | | | | | | | | | | | | | | | | 22 |
Georgia | HVP | | | | | | | | | | | | | | | | | | | | |
Investment in Unconsolidated Real Estate Venture | | | | | | | | | | | | | | | | | | | | |
Number of self-storage facilities acquired | facility | | | | | | | | | | | | | | | | (2) | | | | |
Number of properties to be acquired under the contract | facility | | | | | | | | | | | | | | | | | | | | 5 |
HHFNE | | | | | | | | | | | | | | | | | | | | |
Investment in Unconsolidated Real Estate Venture | | | | | | | | | | | | | | | | | | | | |
Ownership interest in partnership (as a percent) | | | | | | | 10.00% | | | | | | | | | | | | | |
Number of self-storage facilities acquired | facility | | | | | | | 13 | | | | | | | | | | | | | |
Acquisitions of storage facilities | | | | | | | $ 87,500 | | | | | | | | | | | | | |
Intangible value of the in-place leases | | | | | | | 6,000 | | | | | | | | | | | | | |
Investment in joint venture | | | | | | | 3,800 | | | | | | | | | | | | | |
Payment to acquire ownership interest in joint venture | | | | | | | $ 44,500 | | | | | | | | | | | | | |
HVP | | | | | | | | | | | | | | | | | | | | |
Investment in Unconsolidated Real Estate Venture | | | | | | | | | | | | | | | | | | | | |
Investment in real estate entities | | | | | | | | | | | | | | | | $ 16,100 | | | | |
Payment made for acquisition of interest in real estate ventures | | | | | | | | | | | | | | | | $ 14,100 | | | | |
Intangible value of the in-place leases | | | | | | | | | | | | | | | | | | | | $ 10,600 |
Investment in joint venture | | | | | | | | | | 5,400 | | | | | | | | $ 10,700 | | |
Payment to acquire ownership interest in joint venture | | | | | | | | | | 63,500 | | | | | | | | 116,000 | | |
Venture's loan | | | | | | | | | | | | | | | | | | $ 122,000 | | |
HVP | Maximum | | | | | | | | | | | | | | | | | | | | |
Investment in Unconsolidated Real Estate Venture | | | | | | | | | | | | | | | | | | | | |
Venture's loan | | | | | | | | | | $ 185,500 | | | | | | | | | | |
HVP | LIBOR | | | | | | | | | | | | | | | | | | | | |
Investment in Unconsolidated Real Estate Venture | | | | | | | | | | | | | | | | | | | | |
Interest rate (as percentage) | | | | | | | | | | 2.00% | | | | | | | | | | |
HVP | HVP | | | | | | | | | | | | | | | | | | | | |
Investment in Unconsolidated Real Estate Venture | | | | | | | | | | | | | | | | | | | | |
Proceeds from venture related to real estate contribution | | | | | $ 7,500 | | | | | | | | | | | | | | | |
HVP | Tennessee | | | | | | | | | | | | | | | | | | | | |
Investment in Unconsolidated Real Estate Venture | | | | | | | | | | | | | | | | | | | | |
Number of properties to be acquired under the contract | facility | | | | | | | | | | | | | | | | | | 10 | | |
HVP | Texas | | | | | | | | | | | | | | | | | | | | |
Investment in Unconsolidated Real Estate Venture | | | | | | | | | | | | | | | | | | | | |
Contribution of storage property to real estate venture | | | | | $ 9,400 | | | | | | | | | | | | | | | |
HHF | | | | | | | | | | | | | | | | | | | | |
Investment in Unconsolidated Real Estate Venture | | | | | | | | | | | | | | | | | | | | |
Ownership interest in partnership (as a percent) | | | | | | | | | | | | | | 50.00% | | | | | | |
Number of storage facilities owned by investee | property | | | | | | | | | | | | | | 35 | | | | | | |
Payment made for acquisition of interest in real estate ventures | | | | | | | | | | | | | | $ 315,700 | | | | | | |
Intangible value of the in-place leases | | | | | | | | | | | | | | $ 12,100 | | | | | | |
Proceeds after closing costs distributed proportionately to partners | | | | | | | | | | | | | $ 99,200 | | | | | | | |
HHF | Secured loan 3.59% due April 30, 2021 | | | | | | | | | | | | | | | | | | | | |
Investment in Unconsolidated Real Estate Venture | | | | | | | | | | | | | | | | | | | | |
Amount of loan obtained | | | | | | | | | | | | | $ 100,000 | | | | | | | |
Interest on real estate venture debt | | | | | | | | | | | | | 3.59% | | | | | | | |
HHF | Texas | | | | | | | | | | | | | | | | | | | | |
Investment in Unconsolidated Real Estate Venture | | | | | | | | | | | | | | | | | | | | |
Number of storage facilities owned by investee | property | | | | | | | | | | | | | 34 | 34 | | | | | | |
HHF | North Carolina | | | | | | | | | | | | | | | | | | | | |
Investment in Unconsolidated Real Estate Venture | | | | | | | | | | | | | | | | | | | | |
Number of storage facilities owned by investee | property | | | | | | | | | | | | | | 1 | | | | | | |
Capital Storage Partners, LLC | | | | | | | | | | | | | | | | | | | | |
Investment in Unconsolidated Real Estate Venture | | | | | | | | | | | | | | | | | | | | |
Ownership interest in partnership (as a percent) | 100.00% | | | | | | | | | | | | | | | | | | | |
Investment in joint venture | $ 5,000 | | | | | | | | | | | | | | | | | | | |
Series A Preferred shares, percentage | | | | | | | | | | | | | | | 11.00% | | | | | |