Segment Reporting (Summary Of Results Of Operations For Principal Business Segment) (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2024 USD ($) segment	Dec. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenue	$ 210,527	$ 222,744	$ 203,115
Depreciation and amortization	(15,779)	(18,422)	(20,918)
General and administrative expense	(20,161)	(20,172)	(21,416)
Impairment of long-lived assets	0	0	(1,549)
Total costs and expenses	(224,560)	(234,775)	(231,598)
Segment operating income (loss)	$ (14,033)	(12,031)	(28,483)
Number of operating segments | segment	2
Operating Segments [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenue	$ 215,136	227,511	208,138
Costs and expenses	(193,229)	(200,948)	(192,738)
Depreciation and amortization	(15,392)	(17,711)	(19,846)
General and administrative expense	(4,633)	(4,937)	(5,215)
Impairment of long-lived assets			(1,549)
Total costs and expenses	(213,254)	(223,596)	(219,348)
Segment operating income (loss)	1,882	3,915	(11,210)
Inter-segment Elimination [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenue	(4,609)	(4,767)	(5,023)
Costs and expenses	(4,609)	(4,767)	(5,023)
Cinema Exhibition [Member] | Operating Segments [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenue	195,130	207,641	191,321
Costs and expenses	(183,986)	(192,185)	(183,791)
Depreciation and amortization	(10,232)	(11,335)	(13,351)
General and administrative expense	(3,709)	(3,997)	(4,346)
Impairment of long-lived assets			(1,549)
Total costs and expenses	(197,927)	(207,517)	(203,037)
Segment operating income (loss)	(2,797)	124	(11,716)
Cinema Exhibition [Member] | Inter-segment Elimination [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Costs and expenses	(4,609)	(4,767)	(5,023)
Real Estate [Member] | Operating Segments [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenue	20,006	19,870	16,817
Costs and expenses	(9,243)	(8,763)	(8,947)
Depreciation and amortization	(5,160)	(6,376)	(6,495)
General and administrative expense	(924)	(940)	(869)
Total costs and expenses	(15,327)	(16,079)	(16,311)
Segment operating income (loss)	4,679	3,791	506
Real Estate [Member] | Inter-segment Elimination [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenue	(4,609)	(4,767)	(5,023)
Third Party [Member] | Operating Segments [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenue	210,527	222,744	203,115
Costs and expenses	(188,620)	(196,181)	(187,715)
Third Party [Member] | Cinema Exhibition [Member] | Operating Segments [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenue	195,130	207,641	191,321
Costs and expenses	(179,377)	(187,418)	(178,768)
Third Party [Member] | Real Estate [Member] | Operating Segments [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenue	15,397	15,103	11,794
Costs and expenses	$ (9,243)	$ (8,763)	$ (8,947)