Description Of Business And Segment Reporting (Schedule Of Operating Property By Country) (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Jan. 01, 2019	Dec. 31, 2018
Segment Reporting Information [Line Items]
Total operating property	$ 258,138	$ 258,037	$ 257,667
United States [Member]
Segment Reporting Information [Line Items]
Total operating property	91,704		95,710
Australia [Member]
Segment Reporting Information [Line Items]
Total operating property	137,677		132,624
New Zealand [Member]
Segment Reporting Information [Line Items]
Total operating property	$ 28,757		$ 29,333