Description Of Business And Segment Reporting (Schedule Of Operating Property By Country) (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Segment Reporting Information [Line Items]
Total operating property	$ 257,667	$ 264,724
United States [Member]
Segment Reporting Information [Line Items]
Total operating property	95,710	89,183
Australia [Member]
Segment Reporting Information [Line Items]
Total operating property	132,624	143,200
New Zealand [Member]
Segment Reporting Information [Line Items]
Total operating property	$ 29,333	$ 32,341