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Consolidated Statements Of Equity (Parentheticals) - $ / shares	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Common shares issued	0	3,599	0
Conversions and redemptions of operating partnership units	0	8	2
Cash distributions declared to equity holders per share	$ 3.32	$ 3.20	$ 3.08
Additional Paid-In Capital
Common share options exercised	0	0	8

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Aggregate dividends declared during the period for each share of common stock outstanding.

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The number of shares issued during the period upon the conversion of units. An example of a convertible unit is an umbrella partnership real estate investment trust unit (UPREIT unit).

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