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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 | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2025 | Mar. 31, 2025 | Jun. 30, 2024 | Mar. 31, 2024 | Jun. 30, 2025 | Jun. 30, 2024 | Dec. 31, 2024
Basic and diluted earnings per common share |  |  |  |  |  |  |
Net income | $ 82,432 |  | $ 94,186 |  | $ 171,177 | $ 189,044 |
Net income attributable to noncontrolling interests in the Operating Partnership | (401) |  | (524) |  | (854) | (1,065) |
Net loss attributable to noncontrolling interests in subsidiaries | 929 |  | 302 |  | 1,834 | 512 |
NET INCOME ATTRIBUTABLE TO THE COMPANY | $ 82,960 |  | $ 93,964 |  | $ 172,157 | $ 188,491 |
Weighted average basic shares outstanding (in shares) | 228,737,000 |  | 225,886,000 |  | 228,700,000 | 225,827,000 |
Share options and restricted share units (in shares) | 566,000 |  | 732,000 |  | 573,000 | 766,000 |
Weighted-average diluted shares outstanding (in shares) | 229,303,000 |  | 226,618,000 |  | 229,273,000 | 226,593,000 |
Basic earnings per share attributable to common shareholders (in dollars per share) | $ 0.36 |  | $ 0.42 |  | $ 0.75 | $ 0.83 |
Diluted earnings per share attributable to common shareholders (in dollars per share) | 0.36 |  | 0.41 |  | 0.75 | 0.83 |
Dividends declared per common share (in dollars per share) | $ 0.52 | $ 0.52 | $ 0.51 | $ 0.51 | $ 1.04 | $ 1.02 |
Basic and diluted earnings per common unit |  |  |  |  |  |  |
Weighted average basic shares outstanding (in shares) | 228,737,000 |  | 225,886,000 |  | 228,700,000 | 225,827,000 |
Share options and restricted share units (in shares) | 566,000 |  | 732,000 |  | 573,000 | 766,000 |
Weighted-average diluted shares outstanding (in shares) | 229,303,000 |  | 226,618,000 |  | 229,273,000 | 226,593,000 |
Diluted earnings per share attributable to common shareholders (in dollars per share) | $ 0.36 |  | $ 0.41 |  | $ 0.75 | $ 0.83 |
Potentially dilutive shares not included in the earnings per share calculation as their effect is antidilutive (in shares) | 1,400,000 |  |  |  | 1,400,000 | 1,100,000 |
Dividends declared per common share (in dollars per share) | $ 0.52 | 0.52 | $ 0.51 | 0.51 | $ 1.04 | $ 1.02 |
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) | 1,100,000 |  | 1,300,000 |  | 1,100,000 | 1,300,000 |
CubeSmart, L.P. and Subsidiaries |  |  |  |  |  |  |
Basic and diluted earnings per common share |  |  |  |  |  |  |
Net income |  |  |  |  | $ 171,177 | $ 189,044 |
Weighted average basic shares outstanding (in shares) | 229,852,000 |  | 227,145,000 |  | 229,842,000 | 227,101,000 |
Share options and restricted share units (in shares) | 566,000 |  | 732,000 |  | 573,000 | 766,000 |
Weighted-average diluted shares outstanding (in shares) | 230,418,000 |  | 227,877,000 |  | 230,415,000 | 227,867,000 |
Diluted earnings per share attributable to common shareholders (in dollars per share) | $ 0.36 |  | $ 0.41 |  | $ 0.75 | $ 0.83 |
Dividends declared per common share (in dollars per share) | $ 0.52 |  | $ 0.51 |  | $ 1.04 | $ 1.02 |
Basic and diluted earnings per common unit |  |  |  |  |  |  |
Net Income | $ 82,432 |  | $ 94,186 |  | $ 171,177 | $ 189,044 |
Net loss attributable to noncontrolling interests in subsidiaries | 929 |  | 302 |  | 1,834 | 512 |
Net income attributable to CubeSmart L.P. | $ 83,361 |  | $ 94,488 |  | $ 173,011 | $ 189,556 |
Weighted average basic shares outstanding (in shares) | 229,852,000 |  | 227,145,000 |  | 229,842,000 | 227,101,000 |
Share options and restricted share units (in shares) | 566,000 |  | 732,000 |  | 573,000 | 766,000 |
Weighted-average diluted shares outstanding (in shares) | 230,418,000 |  | 227,877,000 |  | 230,415,000 | 227,867,000 |
Basic earnings per unit attributable to common unitholders (in dollars per share) | $ 0.36 |  | $ 0.42 |  | $ 0.75 | $ 0.83 |
Diluted earnings per share attributable to common shareholders (in dollars per share) | 0.36 |  | 0.41 |  | 0.75 | 0.83 |
Dividends declared per common unit (in dollars per unit) | $ 0.52 | $ 0.52 | $ 0.51 | $ 0.51 | $ 0.52 | $ 0.51 |
Potentially dilutive shares not included in the earnings per share calculation as their effect is antidilutive (in shares) | 1,400,000 |  | 1,100,000 |  | 1,400,000 | 1,100,000 |
Dividends declared per common share (in dollars per share) | $ 0.52 |  | $ 0.51 |  | $ 1.04 | $ 1.02 |
Outstanding units of noncontrolling interest in the Operating Partnership (in shares) | 1,103,240 |  | 1,238,205 |  | 1,103,240 | 1,238,205 | 1,194,705

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