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EARNINGS PER SHARE AND UNIT AND SHAREHOLDERS' EQUITY AND CAPITAL - Common and Preferred Shares (Details) - USD ($) $ in Thousands | 3 Months Ended
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Jun. 30, 2021 | Mar. 31, 2021 | Jun. 30, 2020 | Mar. 31, 2020
EARNINGS PER SHARE AND UNIT AND SHAREHOLDERS' EQUITY AND CAPITAL |  |  |  |
Net proceeds from sale of common shares | $ 42,429 | $ 99,688 | $ (70) | $ (118)

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