Components of Rental Income and Expense (Schedule Of Minimum Rent) (Details) - USD ($) $ in Thousands |
12 Months Ended | ||
---|---|---|---|
Dec. 31, 2017 |
Dec. 31, 2016 |
Dec. 31, 2015 |
|
Components Of Rental Income and Expense [Abstract] | |||
Straight-line rents | $ 12,900 | $ 8,100 | $ 7,600 |
Net amortization of above and below market leases | $ 4,721 | $ 1,825 | $ 2,705 |