Segment Reporting (Summary Of Real Estate Segment Revenue To Segment Operating Income) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenue	$ 40,169	$ 45,052
Depreciation and amortization	(3,375)	(4,205)
General and administrative expense	(5,153)	(5,423)
Operating income (loss)	(6,891)	(7,531)
Operating Segments [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenue	41,249	46,204
Operating expense	(39,612)	(44,107)
Depreciation and amortization	(3,243)	(4,104)
General and administrative expense	(1,275)	(1,268)
Operating income (loss)	(2,881)	(3,275)
Real Estate [Member] \| Operating Segments [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenue	4,845	4,933
Operating expense	(1,955)	(2,235)
Depreciation and amortization	(1,102)	(1,517)
General and administrative expense	(194)	(291)
Depreciation, amortization, general and administrative expense	(1,296)	(1,808)
Operating income (loss)	1,594	890
United States [Member] \| Real Estate [Member] \| Operating Segments [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenue	1,587	1,485
Occupancy expense	(177)	(192)
Utilities	(44)	(30)
Cleaning and maintenance	(31)	(47)
Other operating expenses	(165)	(342)
Operating expense	(654)	(845)
Depreciation and amortization	(660)	(739)
General and administrative expense	(130)	(268)
Depreciation, amortization, general and administrative expense	(790)	(1,007)
Operating income (loss)	143	(367)
United States [Member] \| Live Theater Rental And Ancillary [Member] \| Real Estate [Member] \| Operating Segments [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenue	543	413
United States [Member] \| Property Rental [Member] \| Real Estate [Member] \| Operating Segments [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenue	1,044	1,072
United States [Member] \| Live Theater Cost [Member] \| Real Estate [Member] \| Operating Segments [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Operating expense	(237)	(234)
Australia [Member] \| Real Estate [Member] \| Operating Segments [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Occupancy expense	(487)	(489)
Labor cost	(44)	(58)
Utilities	(13)	(14)
Cleaning and maintenance	(220)	(215)
Other operating expenses	(258)	(234)
Operating expense	(1,022)	(1,010)
Depreciation and amortization	(385)	(591)
General and administrative expense	(63)	(24)
Depreciation, amortization, general and administrative expense	(448)	(615)
Operating income (loss)	1,545	1,458
Australia [Member] \| Property Rental [Member] \| Real Estate [Member] \| Operating Segments [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenue	3,015	3,083
New Zealand [Member] \| Real Estate [Member] \| Operating Segments [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Occupancy expense	(58)	(111)
Labor cost	(2)	(6)
Utilities	(5)	(19)
Cleaning and maintenance	(4)	(11)
Other operating expenses	(210)	(233)
Operating expense	(279)	(380)
Depreciation and amortization	(57)	(186)
General and administrative expense	(1)
Depreciation, amortization, general and administrative expense	(58)	(186)
Operating income (loss)	(94)	(201)
New Zealand [Member] \| Property Rental [Member] \| Real Estate [Member] \| Operating Segments [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenue	$ 243	$ 365

READING INTERNATIONAL INC 10-Q