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Document And Entity Information - USD ($)	12 Months Ended
Document And Entity Information - USD ($)	Dec. 31, 2019	Mar. 13, 2020	Jun. 28, 2019
Document Type	10-K
Document Annual Report	true
Document Transition Report	false
Entity File Number	1-8625
Amendment Flag	false
Document Period End Date	Dec. 31, 2019
Document Fiscal Year Focus	2019
Document Fiscal Period Focus	FY
Entity Registrant Name	Reading International Inc
Entity Incorporation, State or Country Code	NV
Entity Tax Identification Number	95-3885184
Entity Address, Address Line One	5995 Sepulveda Boulevard
Entity Address, Address Line Two	Suite 300
Entity Address, City or Town	Culver City
Entity Address, State or Province	CA
Entity Address, Postal Zip Code	90230
City Area Code	213
Local Phone Number	235-2240
Entity Central Index Key	0000716634
Current Fiscal Year End Date	--12-31
Entity Filer Category	Accelerated Filer
Entity Well-known Seasoned Issuer	No
Entity Current Reporting Status	Yes
Entity Voluntary Filers	No
Entity Interactive Data Current	Yes
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Public Float			$ 312,559,671
Documents Incorporated by Reference	Documents Incorporated by Reference Certain portions of the registrant’s definitive Proxy Statement for the 2020 annual meeting of the stockholders to be filed with the Securities and Exchange Commission within 120 days after the end of the fiscal year ended December 31, 2019 are incorporated by reference into Part III of this Annual Report on Form 10-K.
Class A [Member]
Title of 12(b) Security	Class A Nonvoting Common Stock, $0.01 par value
Trading Symbol	RDI
Security Exchange Name	NASDAQ
Entity Common Stock, Shares Outstanding		20,037,550
Class B [Member]
Title of 12(b) Security	Class B Voting Common Stock, $0.01 par value
Trading Symbol	RDIB
Security Exchange Name	NASDAQ
Entity Common Stock, Shares Outstanding		1,680,590