Components Of Rental Income (Schedule Of Minimum Rent) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Minimum Rent [Line Items]
Straight-line rents	$ 1.4	$ 3.9	$ 4.7	$ 11.3
Amortization of above market leases
Minimum Rent [Line Items]
Amortization of above and below market leases	(1.2)	(1.6)	(4.2)	(4.4)
Amortization of below market leases
Minimum Rent [Line Items]
Amortization of above and below market leases	$ 3.2	$ 2.5	$ 8.0	$ 7.7