Description Of Business And Segment Reporting (Summary Of Results Of Operations For Principal Business Segments) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenue	$ 60,090	$ 66,563	$ 151,951	$ 177,425
Segment operating income (loss)	(343)	1,019	(15,562)	(5,073)
Operating Segments [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenue	60,090	66,562	151,951	177,425
Segment operating income (loss)	3,609	5,315	(3,329)	7,468
Inter-segment Elimination [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenue	(1,165)	(1,181)	(3,463)	(3,644)
Cinema Exhibition [Member] | Operating Segments [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenue	56,357	62,687	140,570	165,731
Segment operating income (loss)	2,213	4,395	(6,563)	4,256
Real Estate [Member] | Operating Segments [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenue	4,898	5,056	14,844	15,338
Segment operating income (loss)	$ 1,396	$ 920	$ 3,234	$ 3,212