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Shareholders' Equity / Partners' Capital - Distributions (Details) - $ / shares | 1 Months Ended | 3 Months Ended | 9 Months Ended
--- | --- | --- | ---
Jun. 30, 2021 | Sep. 30, 2021 | Jun. 30, 2021 | Mar. 31, 2021 | Sep. 30, 2020 | Jun. 30, 2020 | Mar. 31, 2020 | Sep. 30, 2021
Class A common shares |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |
Common stock dividend declared (in dollars per share) |  | $ 0.10 | $ 0.10 | $ 0.10 | $ 0.05 | $ 0.05 | $ 0.05 |
Class B common shares |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |
Common stock dividend declared (in dollars per share) |  | 0.10 | 0.10 | 0.10 | 0.05 | 0.05 | 0.05 |
Series D perpetual preferred shares |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |
Preferred stock, dividend rate (in percent) | 6.50% |  |  |  |  |  |  | 6.50%
Preferred shares, dividends declared (in dollars per share) |  | 0 | 0.30 | 0.41 | 0.41 | 0.41 | 0.41 |
Series E perpetual preferred shares |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |
Preferred stock, dividend rate (in percent) | 6.35% |  |  |  |  |  |  | 6.35%
Preferred shares, dividends declared (in dollars per share) |  | 0 | 0.40 | 0.40 | 0.40 | 0.40 | 0.40 |
Series F perpetual preferred shares |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |
Preferred stock, dividend rate (in percent) |  |  |  |  |  |  |  | 5.875%
Preferred shares, dividends declared (in dollars per share) |  | 0.37 | 0.37 | 0.37 | 0.37 | 0.37 | 0.37 |
Series G perpetual preferred shares |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |
Preferred stock, dividend rate (in percent) |  |  |  |  |  |  |  | 5.875%
Preferred shares, dividends declared (in dollars per share) |  | 0.37 | 0.37 | 0.37 | 0.37 | 0.37 | 0.37 |
Series H perpetual preferred shares |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |
Preferred stock, dividend rate (in percent) |  |  |  |  |  |  |  | 6.25%
Preferred shares, dividends declared (in dollars per share) |  | $ 0.39 | $ 0.39 | $ 0.39 | $ 0.39 | $ 0.39 | $ 0.39 |

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