Segment Reporting (Summary Of Cinema Exhibition Segment Revenue To Segment Operating Income) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenue	$ 60,378	$ 46,809	$ 100,547	$ 91,861
Depreciation and amortization	(3,380)	(4,011)	(6,756)	(8,216)
General and administrative expense	(5,384)	(5,271)	(10,537)	(10,693)
Operating income (loss)	2,891	(7,692)	(4,001)	(15,222)
Operating Segments [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenue	61,435	47,954	102,684	94,159
Operating expense	(49,780)	(46,364)	(89,392)	(90,471)
Depreciation and amortization	(3,297)	(3,912)	(6,538)	(8,015)
General and administrative expense	(1,426)	(1,341)	(2,701)	(2,611)
Operating income (loss)	6,932	(3,663)	4,053	(6,938)
Cinema Exhibition [Member] | Operating Segments [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenue	56,782	42,941	93,186	84,213
Occupancy expense	(4,420)	(6,545)	(8,387)	(12,332)
Labor cost	(4,212)	(4,002)	(8,293)	(8,150)
Utilities	(1,332)	(1,337)	(2,551)	(2,645)
Cleaning and maintenance	(1,754)	(1,656)	(3,295)	(3,083)
Other operating expenses	(2,321)	(2,094)	(4,468)	(4,219)
Operating expense	(47,940)	(43,903)	(85,597)	(85,775)
Depreciation and amortization	(2,172)	(2,554)	(4,312)	(5,141)
General and administrative expense	(1,217)	(1,093)	(2,298)	(2,072)
Depreciation, amortization, general and administrative expense	(3,389)	(3,647)	(6,610)	(7,213)
Operating income (loss)	5,453	(4,609)	979	(8,775)
Film Rent And Advertising Cost [Member] | Cinema Exhibition [Member] | Operating Segments [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Operating expense	(9,108)	(6,272)	(14,166)	(12,411)
Food and Beverage [Member] | Cinema Exhibition [Member] | Operating Segments [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Operating expense	(2,931)	(2,012)	(4,514)	(3,919)
United States [Member] | Cinema Exhibition [Member] | Operating Segments [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenue	30,258	21,480	48,553	42,785
Operating expense	(26,078)	(23,918)	(45,674)	(46,759)
Depreciation and amortization	(1,157)	(1,250)	(2,278)	(2,521)
General and administrative expense	(731)	(738)	(1,456)	(1,373)
Depreciation, amortization, general and administrative expense	(1,888)	(1,988)	(3,734)	(3,894)
Operating income (loss)	2,292	(4,426)	(855)	(7,868)
United States [Member] | Admissions [Member] | Cinema Exhibition [Member] | Operating Segments [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenue	16,099	11,681	26,344	23,922
United States [Member] | Concessions [Member] | Cinema Exhibition [Member] | Operating Segments [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenue	11,274	7,452	17,382	14,413
United States [Member] | Advertising And Other [Member] | Cinema Exhibition [Member] | Operating Segments [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenue	2,885	2,347	4,827	4,450
Australia [Member] | Cinema Exhibition [Member] | Operating Segments [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenue	22,909	18,543	38,591	35,867
Occupancy expense	(4,511)	(4,538)	(8,805)	(8,940)
Labor cost	(3,425)	(3,442)	(6,732)	(6,715)
Utilities	(651)	(640)	(1,493)	(1,452)
Cleaning and maintenance	(1,154)	(1,173)	(2,304)	(2,377)
Other operating expenses	(799)	(908)	(1,574)	(1,780)
Operating expense	(18,657)	(17,083)	(34,056)	(33,368)
Depreciation and amortization	(905)	(1,192)	(1,819)	(2,382)
General and administrative expense	(427)	(355)	(772)	(699)
Depreciation, amortization, general and administrative expense	(1,332)	(1,547)	(2,591)	(3,081)
Operating income (loss)	2,920	(87)	1,944	(582)
Australia [Member] | Admissions [Member] | Cinema Exhibition [Member] | Operating Segments [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenue	14,275	10,851	23,905	21,113
Australia [Member] | Concessions [Member] | Cinema Exhibition [Member] | Operating Segments [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenue	7,213	6,348	12,069	12,114
Australia [Member] | Film Rent And Advertising Cost [Member] | Cinema Exhibition [Member] | Operating Segments [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Operating expense	(6,586)	(4,947)	(10,542)	(9,395)
Australia [Member] | Food and Beverage [Member] | Cinema Exhibition [Member] | Operating Segments [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Operating expense	(1,531)	(1,435)	(2,606)	(2,709)
Australia [Member] | Advertising And Other [Member] | Cinema Exhibition [Member] | Operating Segments [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenue	1,421	1,344	2,617	2,640
New Zealand [Member] | Cinema Exhibition [Member] | Operating Segments [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenue	3,615	2,918	6,042	5,561
Occupancy expense	(737)	(783)	(1,471)	(1,543)
Labor cost	(579)	(593)	(1,113)	(1,155)
Utilities	(136)	(101)	(234)	(198)
Cleaning and maintenance	(196)	(189)	(390)	(393)
Other operating expenses	(147)	(259)	(454)	(495)
Operating expense	(3,205)	(2,902)	(5,867)	(5,648)
Depreciation and amortization	(111)	(112)	(214)	(238)
General and administrative expense	(58)		(71)
Depreciation, amortization, general and administrative expense	(169)	(112)	(285)	(238)
Operating income (loss)	241	(96)	(110)	(325)
New Zealand [Member] | Admissions [Member] | Cinema Exhibition [Member] | Operating Segments [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenue	2,338	1,744	3,884	3,344
New Zealand [Member] | Concessions [Member] | Cinema Exhibition [Member] | Operating Segments [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenue	1,135	1,013	1,901	1,923
New Zealand [Member] | Film Rent And Advertising Cost [Member] | Cinema Exhibition [Member] | Operating Segments [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Operating expense	(1,141)	(752)	(1,789)	(1,434)
New Zealand [Member] | Food and Beverage [Member] | Cinema Exhibition [Member] | Operating Segments [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Operating expense	(269)	(225)	(416)	(430)
New Zealand [Member] | Advertising And Other [Member] | Cinema Exhibition [Member] | Operating Segments [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenue	$ 142	$ 161	$ 257	$ 294