Components Of Rental Income (Schedule Of Minimum Rent) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Minimum Rent [Line Items]
Straight-line rents	$ 1.4	$ 3.8	$ 3.3	$ 7.4
Amortization of above market leases
Minimum Rent [Line Items]
Amortization of above and below market leases	(1.3)	(1.4)	(3.0)	(2.8)
Amortization of below market leases
Minimum Rent [Line Items]
Amortization of above and below market leases	$ 2.3	$ 2.7	$ 4.8	$ 5.2