Earnings Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
BASIC
Net income attributable to common shareholders	$ 5,028	$ 40,285	$ 115,470	$ 74,088
Weighted-average number of common shares outstanding - basic	278,124,204	274,696,046	276,379,718	264,211,668
Net income attributable to common shares - per common share basic (in dollars per share)	$ 0.02	$ 0.15	$ 0.42	$ 0.28
DILUTED
Net income attributable to common shareholders, diluted	$ 5,028	$ 40,285	$ 115,470	$ 74,088
Effect of dilutive securities:
Shares issuable under forward sale agreements (in shares)	2,765,030	0	1,290,968	0
Unvested share-based payment awards and options (in shares)	1,159,224	1,326,716	911,163	1,234,553
Weighted-average common shares outstanding - diluted (in shares)	282,048,458	276,022,762	278,581,849	265,446,221
Net income attributable to common shareholders - per common share diluted (in dollars per share)	$ 0.02	$ 0.15	$ 0.41	$ 0.28