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