Consolidated Statements Of Comprehensive Income - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Consolidated Statements Of Comprehensive Income [Abstract]
Net income (loss)	$ (65,857)	$ (26,503)	$ 14,166
Foreign currency translation gain (loss)	6,837	(567)	(14,903)
Gain (loss) on cash flow hedges	(65)	(115)	(137)
Others	130	158	149
Comprehensive income (loss)	(58,955)	(27,027)	(725)
Less: net income (loss) attributable to noncontrolling interests	(657)	(74)	132
Less: comprehensive income (loss) attributable to noncontrolling interests	(11)	2	(15)
Comprehensive income (loss) attributable to Reading International, Inc.	$ (58,287)	$ (26,955)	$ (842)