Earnings Per Share (Schedule Of Anti-Dilutive Securities Of Common Shares) (Details) - shares shares in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Total anti-dilutive securities		898	1,210	2,372	1,916
Share Options [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Total anti-dilutive securities	[1]	898	1,210	896	1,916
Operating Partnership Units [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Total anti-dilutive securities		0	0	1,476	0

[1] Exclusion results as exercise prices were greater than the average market price for each respective period.