Consolidated Statements Of Equity (Parentheticals) - $ / shares	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Common shares issued	0	0	898
Common share options exercised	202,993	53,358	375,316
Conversions and redemptions of operating partnership units	8	2	1
Cash distributions declared to equity holders per share	$ 7.25	$ 2.80	$ 2.64
Additional Paid-In Capital
Common share options exercised	45	0	55