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EARNINGS PER SHARE AND UNIT AND SHAREHOLDERS' EQUITY AND CAPITAL - Earnings Per Share and Unit (Details) - USD ($) $ / shares in Units, $ in Thousands | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2024 | Jun. 30, 2024 | Mar. 31, 2024 | Sep. 30, 2023 | Jun. 30, 2023 | Mar. 31, 2023 | Sep. 30, 2024 | Sep. 30, 2023 | Dec. 31, 2023
Basic and diluted earnings per common share |  |  |  |  |  |  |  |  |
Net income | $ 100,950 |  |  | $ 103,073 |  |  | $ 289,994 | $ 299,298 |
Net income attributable to noncontrolling interests in the Operating Partnership | (551) |  |  | (640) |  |  | (1,616) | (1,870) |
Net loss attributable to noncontrolling interests in subsidiaries | 398 |  |  | 212 |  |  | 910 | 662 |
NET INCOME ATTRIBUTABLE TO THE COMPANY | $ 100,797 |  |  | $ 102,645 |  |  | $ 289,288 | $ 298,090 |
Weighted average basic shares outstanding (in shares) | 226,166,000 |  |  | 225,467,000 |  |  | 225,941,000 | 225,380,000 |
Share options and restricted share units (in shares) | 983,000 |  |  | 743,000 |  |  | 864,000 | 826,000 |
Weighted-average diluted shares outstanding (in shares) | 227,149,000 |  |  | 226,210,000 |  |  | 226,805,000 | 226,206,000 |
Basic earnings per share attributable to common shareholders (in dollars per share) | $ 0.45 |  |  | $ 0.46 |  |  | $ 1.28 | $ 1.32 |
Diluted earnings per share attributable to common shareholders (in dollars per share) | $ 0.44 |  |  | $ 0.45 |  |  | $ 1.28 | $ 1.32 |
Basic and diluted earnings per common unit |  |  |  |  |  |  |  |  |
Weighted average basic shares outstanding (in shares) | 226,166,000 |  |  | 225,467,000 |  |  | 225,941,000 | 225,380,000 |
Share options and restricted share units (in shares) | 983,000 |  |  | 743,000 |  |  | 864,000 | 826,000 |
Weighted-average diluted shares outstanding (in shares) | 227,149,000 |  |  | 226,210,000 |  |  | 226,805,000 | 226,206,000 |
Diluted earnings per share attributable to common shareholders (in dollars per share) | $ 0.44 |  |  | $ 0.45 |  |  | $ 1.28 | $ 1.32 |
Potentially dilutive shares not included in the earnings per share calculation as their effect is antidilutive (in shares) | 700,000 |  |  | 700,000 |  |  | 700,000 | 700,000 |
Common stock, cash dividends declared (in dollars per share) | $ 0.51 | $ 0.51 | $ 0.51 | $ 0.49 | $ 0.49 | $ 0.49 | $ 1.53 | $ 1.47 |
Operating Partnership [Member] |  |  |  |  |  |  |  |  |
Basic and diluted earnings per common unit |  |  |  |  |  |  |  |  |
Potentially dilutive shares not included in the earnings per share calculation as their effect is antidilutive (in shares) | 1,200,000 |  |  | 1,400,000 |  |  | 1,300,000 | 1,400,000 |
CubeSmart, L.P. and Subsidiaries |  |  |  |  |  |  |  |  |
Basic and diluted earnings per common share |  |  |  |  |  |  |  |  |
Net income |  |  |  |  |  |  | $ 289,994 | $ 299,298 |
Weighted average basic shares outstanding (in shares) | 227,403,000 |  |  | 226,871,000 |  |  | 227,203,000 | 226,795,000 |
Share options and restricted share units (in shares) | 983,000 |  |  | 743,000 |  |  | 864,000 | 826,000 |
Weighted-average diluted shares outstanding (in shares) | 228,386,000 |  |  | 227,614,000 |  |  | 228,067,000 | 227,621,000 |
Diluted earnings per share attributable to common shareholders (in dollars per share) | $ 0.44 |  |  | $ 0.45 |  |  | $ 1.28 | $ 1.32 |
Basic and diluted earnings per common unit |  |  |  |  |  |  |  |  |
Net Income | $ 100,950 |  |  | $ 103,073 |  |  | $ 289,994 | $ 299,298 |
Net loss attributable to noncontrolling interests in subsidiaries | 398 |  |  | 212 |  |  | 910 | 662 |
Net income attributable to CubeSmart L.P. | $ 101,348 |  |  | $ 103,285 |  |  | $ 290,904 | $ 299,960 |
Weighted average basic shares outstanding (in shares) | 227,403,000 |  |  | 226,871,000 |  |  | 227,203,000 | 226,795,000 |
Share options and restricted share units (in shares) | 983,000 |  |  | 743,000 |  |  | 864,000 | 826,000 |
Weighted-average diluted shares outstanding (in shares) | 228,386,000 |  |  | 227,614,000 |  |  | 228,067,000 | 227,621,000 |
Basic earnings per unit attributable to common unitholders (in dollars per share) | $ 0.45 |  |  | $ 0.46 |  |  | $ 1.28 | $ 1.32 |
Diluted earnings per share attributable to common shareholders (in dollars per share) | $ 0.44 |  |  | $ 0.45 |  |  | $ 1.28 | $ 1.32 |
Outstanding units of noncontrolling interest in the Operating Partnership (in shares) | 1,232,205 |  |  | 1,360,549 |  |  | 1,232,205 | 1,360,549 | 1,300,462

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