Equity, Capital and Other Interests - Changes in Issued and Outstanding Common Shares and Units (Details) - shares	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018
Equity Capital And Other Interests [Abstract]
Common Stock, Shares, Outstanding	369,405,161	368,018,082
Common Shares Issued:
Conversion of OP Units	294,400	12,510
Exercise of share options	1,430,048	194,796
Employee Share Purchase Plan (ESPP)	37,263	61,321
Restricted share grants, net	160,460	122,877
Common Stock, Shares, Outstanding	371,327,332	368,409,586
Units
Total Units Outstanding	13,904,035	13,768,438
Restricted unit grants, net	140,055	267,074
Conversion of OP Units to Common Shares	(294,400)	(12,510)
Total Units Outstanding	13,749,690	14,023,002
Common Shares And Units Outstanding	385,077,022	382,432,588
Units Ownership Interest in Operating Partnership	3.60%	3.70%