Components Of Rental Income (Schedule Of Minimum Rent) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Minimum Rent [Line Items]
Straight-line rents	$ 3.9	$ 1.5	$ 11.3	$ 6.2
Amortization of above market leases
Minimum Rent [Line Items]
Amortization of above and below market leases	(1.6)	(1.7)	(4.4)	(5.3)
Amortization of below market leases
Minimum Rent [Line Items]
Amortization of above and below market leases	$ 2.5	$ 2.2	$ 7.7	$ 6.5