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Non-Controlling Interests - Additional Information (Details) $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended	93 Months Ended
	Sep. 30, 2021 USD ($)	Sep. 30, 2020 USD ($)	Sep. 30, 2021 USD ($)	Sep. 30, 2020 USD ($)	Dec. 31, 2014 USD ($) Film	Sep. 30, 2021 USD ($)	Dec. 31, 2020 USD ($)
Non-controlling Interests
Non-controlling interest	$ 82,804		$ 82,804			$ 82,804	$ 78,519
Net income (loss) attributable to non-controlling interest	$ 2,034	$ (1,275)	9,473	$ (15,412)
Investment in film assets			$ 10,035	6,177
IMAX China Noncontrolling Interest [Member]
Non-controlling Interests
Minority Interest Ownership Percentage By Company	69.83%		69.83%			69.83%
IMAX China
Non-controlling Interests
Non-controlling interest	$ 82,800		$ 82,800			$ 82,800
Net income (loss) attributable to non-controlling interest	$ 2,000	$ 2,200	9,500	$ (10,300)
Other Noncontrolling Interest [Member]
Non-controlling Interests
Net income (loss) attributable to non-controlling interest			$ 1
Non-controlling interest description			The Company’s Original Film Fund was established in 2014 to co-finance a portfolio of 10 original large-format films. The initial investment in the Original Film Fund was committed by a third party in the amount of $25.0 million, with the possibility of contributing additional funds. The Company has contributed $9.0 million to the Original Film Fund since 2014 and has reached its maximum contribution.
Number of expected original films | Film					10
Investment in film assets						22,300
Other Noncontrolling Interest [Member] | Third Party [Member]
Non-controlling Interests
Expected contribution to film fund by third party					$ 25,000
Other Noncontrolling Interest [Member] | IMAX [Member]
Non-controlling Interests
Film fund contributions paid						$ 9,000

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