Equity, Capital and Other Interests - Changes in Company's Issued and Outstanding Common Shares and Units (Details) - shares	6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020
Equity Capital And Other Interests [Abstract]
Common Stock, Shares, Outstanding	372,302,000	371,670,884
Common Shares Issued:
Conversion of OP Units	1,084,023	97,363
Exercise of share options	833,669	217,935
Employee Share Purchase Plan (ESPP)	47,761	44,110
Restricted share grants, net	87,377	178,720
Common Stock, Shares, Outstanding	374,354,830	372,209,012
Units
Total Units Outstanding	13,858,073	13,731,315
Restricted unit grants, net	155,638	245,999
Conversion of OP Units to Common Shares	(1,084,023)	(97,363)
Total Units Outstanding	12,929,688	13,879,951
Common Shares And Units Outstanding	387,284,518	386,088,963
Units Ownership Interest in Operating Partnership	3.30%	3.60%