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Equity, Capital and Other Interests - Changes in Company's Issued and Outstanding Common Shares and Units (Details) - shares
 3 Months Ended
Mar. 31, 2021
Mar. 31, 2020
Equity Capital And Other Interests [Abstract]    
Common Stock, Shares, Outstanding 372,302,000 371,670,884
Common Shares Issued:    
Conversion of OP Units   41,945
Exercise of share options 506,342 214,521
Employee Share Purchase Plan (ESPP) 32,572 13,606
Restricted share grants, net 76,499 163,098
Common Stock, Shares, Outstanding 372,917,413 372,104,054
Units    
Total Units Outstanding 13,858,073 13,731,315
Restricted unit grants, net 184,301 243,063
Conversion of OP Units to Common Shares   (41,945)
Total Units Outstanding 14,042,374 13,932,433
Common Shares And Units Outstanding 386,959,787 386,036,487
Units Ownership Interest in Operating Partnership 3.60% 3.60%