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Shareholders' Equity, Noncontrolling Interests and Other Comprehensive Loss - Common Shares and Units - Additional Information (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | ---
Sep. 30, 2021 | Sep. 30, 2020 | Sep. 30, 2021 | Sep. 30, 2020 | Dec. 31, 2020
Restricted shares |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |
Restricted stock, shares canceled for tax withholding for share based compensation (in shares) |  |  | 3,050 |  | 2,075
LTIP Units and Restricted Stock |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |
Unit based compensation expense | $ 2.4 | $ 2.1 | $ 7.1 | $ 6.3 | $ 8.4

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