The amount of depreciation and amortization reported by an equity method investment of the entity.

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The amount of net interest income (expense) reported by an equity method investment of the entity.

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The amount of operating expenses reported by an equity method investment of the entity.

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The amount of real estate property reported by an equity method investment of the entity.

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The amount of other expenses reported by an equity method investment of the entity.

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The amount of other liabilities reported by an equity method investment of the entity.

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The amount of net real estate property reported by an equity method investment of the entity.

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Number of mortgage loans.

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Represents the number of real estate properties that were acquired.

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Represents the number of real estate properties that were sold.

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The number of self-storage facilities involved in transaction.

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Percentage points added to the reference rate to compute the variable rate on the debt instrument.

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Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt.

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Face (par) amount of debt instrument at time of issuance.

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Contractual interest rate for funds borrowed, under the debt agreement.

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The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

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The amount of assets reported by an equity method investment of the entity.

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Amount of equity, excluding noncontrolling interest, attributable to the equity method investment of the entity.

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The amount of liabilities and equity reported by an equity method investment of the entity.

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Amount of equity attributable to noncontrolling interests of an equity method investment of the entity.

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The amount of net income (loss) reported by an equity method investment of the entity.

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Amount of revenue from sale of product and rendering of service reported by equity method investee.

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This item represents the carrying amount on the entity's balance sheet of its investment in common stock of an equity method investee. This is not an indicator of the fair value of the investment, rather it is the initial cost adjusted for the entity's share of earnings and losses of the investee, adjusted for any distributions (dividends) and other than temporary impairment (OTTI) losses recognized.

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Amount of income (loss) for proportionate share of equity method investee's income (loss).

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Amount of investment in equity method investee and investment in and advance to affiliate.

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Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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INVESTMENT IN UNCONSOLIDATED REAL ESTATE VENTURE (Details) $ in Thousands							12 Months Ended
	Oct. 07, 2019 USD ($)	Jun. 06, 2019 property	Jun. 05, 2019 USD ($) property item	Nov. 28, 2018 USD ($) property	Sep. 05, 2018 USD ($) facility	Jan. 31, 2018 USD ($)	Dec. 31, 2019 USD ($) property	Dec. 31, 2018 USD ($) property	Dec. 31, 2017 USD ($)	Dec. 17, 2013
Investment in Unconsolidated Real Estate Venture
Investment in real estate entities							$ 91,117	$ 95,796
Number of self-storage facilities acquired \| property		18					11
Acquisitions of storage facilities							$ 117,998	214,510	$ 69,629
Investment in joint venture							5,000	5,000
Interest on real estate venture debt										4.375%
Summary of results of operations of the real estate venture
Gain from sale of real estate, net							1,508	10,576
Company's share of net income (loss)							11,122	(865)	(1,386)
HHFNE
Investment in Unconsolidated Real Estate Venture
Outstanding debt							$ 45,000
HHFNE \| LIBOR
Investment in Unconsolidated Real Estate Venture
Interest rate (as percentage)							1.20%
HVP III
Investment in Unconsolidated Real Estate Venture
Ownership interest held by the entity (as a percent)		90.00%
Number of storage facilities owned by investee \| property		18
Number of assets sold \| property			50
Net proceeds from sale of assets			$ 82,900
Aggregate sale price			$ 293,500
Number of mortgage loans \| item			5
Summary of results of operations of the real estate venture
Gain from sale of real estate, net			$ 106,700
HVP III \| Term Loan Facility
Investment in Unconsolidated Real Estate Venture
Outstanding debt			22,900
HVP III \| Credit Facility
Investment in Unconsolidated Real Estate Venture
Outstanding debt			179,500
Principal amount of debt			$ 185,500
HVP IV
Investment in Unconsolidated Real Estate Venture
Investment in joint venture							$ 26,300
HVP IV \| Secured Loan Due May 2021
Investment in Unconsolidated Real Estate Venture
Interest rate (as percentage)							1.70%
Outstanding debt							$ 82,200
Principal amount of debt							$ 107,000
HVP IV \| Secured Debt Due June 2024
Investment in Unconsolidated Real Estate Venture
Interest rate (as percentage)							2.75%
Outstanding debt							$ 55,500
HHF \| Secured loan 3.59% due April 30, 2021
Investment in Unconsolidated Real Estate Venture
Interest rate (as percentage)							3.59%
Outstanding debt							$ 100,000
Arizona
Investment in Unconsolidated Real Estate Venture
Number of self-storage facilities acquired \| property							1
Number of assets sold \| property				2
Net proceeds from sale of assets				$ 17,500
Summary of results of operations of the real estate venture
Gain from sale of real estate, net				$ 10,600
Arizona \| HVP IV
Investment in Unconsolidated Real Estate Venture
Number of storage facilities owned by investee \| property							2
Maryland
Investment in Unconsolidated Real Estate Venture
Number of self-storage facilities acquired \| property							1
Maryland \| HVP IV
Investment in Unconsolidated Real Estate Venture
Number of storage facilities owned by investee \| property							1
Michigan \| HVP III
Investment in Unconsolidated Real Estate Venture
Number of assets sold \| property			17
Connecticut \| HHFNE
Investment in Unconsolidated Real Estate Venture
Number of storage facilities owned by investee \| property							(3)
Connecticut \| HVP IV
Investment in Unconsolidated Real Estate Venture
Number of storage facilities owned by investee \| property							2
Massachusetts \| HHFNE
Investment in Unconsolidated Real Estate Venture
Number of storage facilities owned by investee \| property							(6)
Minnesota \| HVP IV
Investment in Unconsolidated Real Estate Venture
Number of storage facilities owned by investee \| property							1
Rhode Island \| HHFNE
Investment in Unconsolidated Real Estate Venture
Number of storage facilities owned by investee \| property							(2)
Vermont \| HHFNE
Investment in Unconsolidated Real Estate Venture
Number of storage facilities owned by investee \| property							(2)
Tennessee \| HVP III
Investment in Unconsolidated Real Estate Venture
Number of assets sold \| property			8
Florida
Investment in Unconsolidated Real Estate Venture
Number of self-storage facilities acquired \| property							5
Florida \| HVP III
Investment in Unconsolidated Real Estate Venture
Number of assets sold \| property			3
Florida \| HVP IV
Investment in Unconsolidated Real Estate Venture
Number of storage facilities owned by investee \| property							4
Texas
Investment in Unconsolidated Real Estate Venture
Number of self-storage facilities acquired \| property							1
Net proceeds from sale of assets	$ 4,100
Cash paid for acquisition of remaining interest in real estate ventures						$ 200
Summary of results of operations of the real estate venture
Gain from sale of real estate, net	$ 1,500
Texas \| HVP IV
Investment in Unconsolidated Real Estate Venture
Number of storage facilities owned by investee \| property							8
Texas \| HHF
Investment in Unconsolidated Real Estate Venture
Number of storage facilities owned by investee \| property							34
North Carolina \| HVP III
Investment in Unconsolidated Real Estate Venture
Number of assets sold \| property			3
North Carolina \| HHF
Investment in Unconsolidated Real Estate Venture
Number of storage facilities owned by investee \| property							1
South Carolina
Investment in Unconsolidated Real Estate Venture
Number of self-storage facilities acquired \| property							1
South Carolina \| HVP III
Investment in Unconsolidated Real Estate Venture
Number of assets sold \| property			15
Georgia
Investment in Unconsolidated Real Estate Venture
Number of self-storage facilities acquired \| property							1
Georgia \| HVP III
Investment in Unconsolidated Real Estate Venture
Number of assets sold \| property			4
Georgia \| HVP IV
Investment in Unconsolidated Real Estate Venture
Number of storage facilities owned by investee \| property							2
Pennsylvania \| HVP IV
Investment in Unconsolidated Real Estate Venture
Number of storage facilities owned by investee \| property							1
Ventures
Investment in Unconsolidated Real Estate Venture
Investment in real estate entities							$ 91,117	$ 95,796
Number of storage facilities owned by investee \| property							69	129
Assets
Storage facilities, net							$ 552,791	$ 741,209
Other assets							11,997	16,042
Total Assets							564,788	757,251
Liabilities and equity
Other liabilities							10,064	7,911
Debt							280,392	413,848
Equity
CubeSmart							91,117	95,796
Joint venture partner							183,215	239,696
Total liabilities and equity							564,788	757,251
Summary of results of operations of the real estate venture
Total revenues							72,582	90,111	81,058
Operating expenses							(32,134)	(37,899)	(33,922)
Other expenses							(3,227)	(938)	(783)
Interest expense, net							(14,927)	(13,311)	(11,703)
Depreciation and amortization							(30,107)	(41,972)	(45,086)
Gain from sale of real estate, net							106,667
Net income (loss)							98,854	(4,009)	(10,436)
Company's share of net income (loss)							11,122	(865)	$ (1,386)
HHFNE
Investment in Unconsolidated Real Estate Venture
Investment in real estate entities							$ 1,998	$ 2,411
Ownership interest in partnership (as a percent)							10.00%
Number of storage facilities owned by investee \| property							13	13
Investment in joint venture							$ 3,800
HVP III
Investment in Unconsolidated Real Estate Venture
Investment in real estate entities								$ 9,183
Ownership interest in partnership (as a percent)							10.00%
Number of storage facilities owned by investee \| property								68
Number of assets sold \| property			50
HVP IV
Investment in Unconsolidated Real Estate Venture
Investment in real estate entities							$ 23,112	$ 14,791
Ownership interest in partnership (as a percent)							20.00%
Number of storage facilities owned by investee \| property							21	13
HHF
Investment in Unconsolidated Real Estate Venture
Investment in real estate entities							$ 66,007	$ 69,411
Ownership interest in partnership (as a percent)							50.00%
Number of storage facilities owned by investee \| property							35	35
Capital Storage Partners, LLC
Investment in Unconsolidated Real Estate Venture
Ownership interest in partnership (as a percent)					100.00%
Number of self-storage facilities acquired \| facility					22
Investment in joint venture					$ 5,000
Series A Preferred shares, percentage					11.00%
Capital Storage Partners, LLC \| Florida
Investment in Unconsolidated Real Estate Venture
Number of self-storage facilities acquired \| facility					4
Capital Storage Partners, LLC \| Texas
Investment in Unconsolidated Real Estate Venture
Number of self-storage facilities acquired \| facility					13
Capital Storage Partners, LLC \| Oklahoma
Investment in Unconsolidated Real Estate Venture
Number of self-storage facilities acquired \| facility					5