Equity, Capital and Other Interests - Changes in Company's Issued and Outstanding Common Shares and Units (Details) - shares	9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Equity Capital And Other Interests [Abstract]
Common Stock, Shares, Outstanding	371,670,884	369,405,161
Common Shares Issued:
Conversion of OP Units	99,737	294,400
Exercise of share options	219,922	1,430,048
Employee Share Purchase Plan (ESPP)	69,986	37,263
Restricted share grants, net	178,720	160,460
Common Stock, Shares, Outstanding	372,239,249	371,327,332
Units
Total Units Outstanding	13,731,315	13,904,035
Restricted unit grants, net	247,822	140,055
Conversion of OP Units to Common Shares	(99,737)	(294,400)
Total Units Outstanding	13,879,400	13,749,690
Common Shares And Units Outstanding	386,118,649	385,077,022
Units Ownership Interest in Operating Partnership	3.60%	3.60%