Equity, Capital and Other Interests - Changes in Company's Issued and Outstanding Common Shares and Units (Details) - shares	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Equity Capital And Other Interests [Abstract]
Common Stock, Shares, Outstanding	371,670,884	369,405,161
Common Shares Issued:
Conversion of OP Units	41,945	184,878
Exercise of share options	214,521	709,071
Employee Share Purchase Plan (ESPP)	13,606	18,901
Restricted share grants, net	163,098	144,390
Common Stock, Shares, Outstanding	372,104,054	370,462,401
Units
Total Units Outstanding	13,731,315	13,904,035
Restricted unit grants, net	243,063	133,214
Conversion of OP Units to Common Shares	(41,945)	(184,878)
Total Units Outstanding	13,932,433	13,852,371
Common Shares And Units Outstanding	386,036,487	384,314,772
Units Ownership Interest in Operating Partnership	3.60%	3.60%