Description Of Business And Segment Reporting (Summary Of Results Of Operations For Principal Business Segments) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenue	$ 64,511	$ 36,033	$ 104,712	$ 57,339
Segment operating income (loss)	(1,572)	(12,532)	(13,349)	(26,510)
Operating Segments [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenue	64,511	36,033	104,712	57,339
Segment operating income (loss)	3,364	(8,399)	(3,744)	(18,044)
Intersegment Eliminations [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenue	(1,291)	(130)	(2,600)	(261)
Cinema Exhibition [Member] | Operating Segments [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenue	61,770	32,715	99,117	50,829
Segment operating income (loss)	3,452	(7,345)	(3,765)	(15,621)
Real Estate [Member] | Operating Segments [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenue	4,032	3,448	8,195	6,771
Segment operating income (loss)	$ (88)	$ (1,054)	$ 21	$ (2,423)