Property And Equipment (Schedule Of The Gross And Carrying Amounts Of The Properties Leased Of Held-For-Leasing) (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Property And Equipment [Abstract]
Gross	$ 71,749	$ 33,879
Accumulated depreciation	17,585	9,982
Net Book Value	$ 54,164	$ 23,897