Recent Transactions (Schedule Of Purchase Price Allocation) (Details)
$ in Thousands
 6 Months Ended
Jun. 30, 2017
USD ($)
Above Market, In-Place And Below Market Leases [Member]  
Business Acquisition [Line Items]  
Amortization period 5 years 4 months 24 days
Red Bank Portfolio [Member]  
Business Acquisition [Line Items]  
Land and leasehold interest $ 7,914
Buildings and improvements and other assets 16,047
Above market leases 118 [1]
In-place lease values 3,171 [1]
Sub Total 27,250
Less: Below market lease values (22) [1]
Net assets recorded upon acquisition 27,228
Short Hills / Madison Portfolio [Member]  
Business Acquisition [Line Items]  
Land and leasehold interest 30,336
Buildings and improvements and other assets 295,299
Above market leases 6,367 [1]
In-place lease values 45,604 [1]
Sub Total 377,606
Less: Below market lease values (10,245) [1]
Net assets recorded upon acquisition $ 367,361
[1] (a) Above market, in-place and below market leases are being amortized over a weighted-average term of 5.4 years.