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CONSOLIDATED STATEMENTS OF OPERATIONS (LP cube) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
REVENUES
Rental income	$ 170,359	$ 140,484	$ 332,835	$ 281,469
Total revenues	199,247	163,798	388,088	327,879
OPERATING EXPENSES
Property operating expenses	63,751	55,345	124,979	111,085
Depreciation and amortization	54,139	39,893	107,949	80,731
General and administrative	11,560	9,543	22,476	19,908
Total operating expenses	129,450	104,781	255,404	211,724
Interest:
Interest expense on loans	(19,112)	(18,702)	(38,346)	(37,383)
Loan procurement amortization expense	(1,012)	(753)	(2,047)	(1,507)
Equity in earnings (losses) of real estate ventures	316	(174)	336	(179)
Other	377	(456)	1,054	163
Total other expense	(19,431)	(20,085)	(39,003)	(38,906)
NET (INCOME) LOSS ATTRIBUTABLE TO NONCONTROLLING INTERESTS
Operating Partnership interests of third parties	$ (1,768)	$ (389)	$ (3,317)	$ (772)
Diluted earnings per share attributable to common shareholders (in dollars per share)	$ 0.24	$ 0.20	$ 0.45	$ 0.39
Weighted-average basic units outstanding (in units)	201,414	193,629	200,293	193,605
Weighted-average diluted units outstanding (in units)	202,809	194,192	201,527	194,231
Other Property Related Income
REVENUES
Property related income	$ 21,218	$ 16,522	$ 40,522	$ 33,424
Property Management Fee Income
REVENUES
Property related income	7,670	6,792	14,731	12,986
Cubesmart, L P and Subsidiaries
REVENUES
Rental income	170,359	140,484	332,835	281,469
Total revenues	199,247	163,798	388,088	327,879
OPERATING EXPENSES
Property operating expenses	63,751	55,345	124,979	111,085
Depreciation and amortization	54,139	39,893	107,949	80,731
General and administrative	11,560	9,543	22,476	19,908
Total operating expenses	129,450	104,781	255,404	211,724
Interest:
Interest expense on loans	(19,112)	(18,702)	(38,346)	(37,383)
Loan procurement amortization expense	(1,012)	(753)	(2,047)	(1,507)
Equity in earnings (losses) of real estate ventures	316	(174)	336	(179)
Other	377	(456)	1,054	163
Total other expense	(19,431)	(20,085)	(39,003)	(38,906)
NET INCOME	50,366	38,932	93,681	77,249
NET (INCOME) LOSS ATTRIBUTABLE TO NONCONTROLLING INTERESTS
Noncontrolling interest in subsidiaries	154	(38)	120	(76)
NET INCOME ATTRIBUTABLE TO CUBESMART L.P.	50,520	38,894	93,801	77,173
Operating Partnership interests of third parties	(1,768)	(389)	(3,317)	(772)
NET INCOME ATTRIBUTABLE TO COMMON UNITHOLDERS	$ 48,752	$ 38,505	$ 90,484	$ 76,401
Basic earnings per unit attributable to common unitholders	$ 0.24	$ 0.20	$ 0.45	$ 0.39
Diluted earnings per share attributable to common shareholders (in dollars per share)	$ 0.24	$ 0.20	$ 0.45	$ 0.39
Weighted-average basic units outstanding (in units)	201,414	193,629	200,293	193,605
Weighted-average diluted units outstanding (in units)	202,809	194,192	201,527	194,231
Cubesmart, L P and Subsidiaries | Other Property Related Income
REVENUES
Property related income	$ 21,218	$ 16,522	$ 40,522	$ 33,424
Cubesmart, L P and Subsidiaries | Property Management Fee Income
REVENUES
Property related income	$ 7,670	$ 6,792	$ 14,731	$ 12,986

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