Common Share Capitalization (Summary Of Common Shares Outstanding) (Details) - shares	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common Shares Outstanding, period begin	32,743,356	33,449,678	33,126,012	33,449,678
Shares repurchased	(126,771)	(34,507)	(509,427)	(34,507)
Directors LTIP units exercised	2,475	1,947	2,475	1,947
Common Shares Outstanding, period end	32,619,060	33,417,118	32,619,060	33,417,118