Description Of Business And Segment Reporting (Summary Of Assets) (Details) - USD ($) $ in Thousands		Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Segment Reporting Information [Line Items]
Total Assets		$ 690,169	$ 674,989
Cash and cash equivalents		26,826	12,135	$ 13,127	$ 13,668
United States [Member]
Segment Reporting Information [Line Items]
Total Assets		340,836	356,191
Australia [Member]
Segment Reporting Information [Line Items]
Total Assets		267,153	248,031
New Zealand [Member]
Segment Reporting Information [Line Items]
Total Assets		82,180	70,767
Country [Member]
Segment Reporting Information [Line Items]
Total Assets		690,169	674,989
Cinema Exhibition [Member]
Segment Reporting Information [Line Items]
Total Assets		357,196	364,905
Real Estate [Member]
Segment Reporting Information [Line Items]
Total Assets		312,832	295,213
Corporate [Member]
Segment Reporting Information [Line Items]
Total Assets	[1]	$ 20,141	$ 14,871

[1] Corporate Assets includes cash and cash equivalents of $26.8 million and $12.1 million as of December 31, 2020 and 2019, respectively.