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Consolidated Statement of Equity (Parenthetical) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Sep. 30, 2017 | Mar. 31, 2017 | Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Class A common shares/units |  |  |  |  |
Offering costs | $ 9,200 | $ 400 | $ 0 | $ 0 | $ 10,637
Common Stock |  |  |  |  |
Dividends declared on common shares (in dollars per unit) |  |  | $ 0.2 | $ 0.2 | $ 0.20
Common Stock | Class A common shares/units |  |  |  |  |
Offering costs |  |  |  |  | $ 10,904
Preferred shares |  |  |  |  |
Offering costs |  |  |  | $ 4,022 | $ 9,355

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