Condensed Consolidated Statements of Cash Flows Supplemental Information - Write-downs (Details) $ in Thousands, ¥ in Millions		3 Months Ended		9 Months Ended
		Sep. 30, 2022 USD ($)	Sep. 30, 2021 USD ($)	Sep. 30, 2022 USD ($)		Sep. 30, 2022 CNY (¥)	Sep. 30, 2021 USD ($)
Write-downs
Other assets				$ 4,500	[1]	¥ 30.0
Inventories		$ 200	$ 300	503	[2]		468	[2]
Equipment supporting joint revenue sharing arrangements	[3]			235			328
Other property, plant and equipment				9
Other intangible assets				24			63
Film assets	[4]			466			(19)
Write-downs				$ 5,707			$ 878

[1] In the nine months ended September 30, 2022, the Company recognized a full impairment of its RMB 30.0 million ($4.5 million) investment in the film Mozart from Space (2021 — $nil) based on projected box office results and distribution costs. (See Note 17(e).)

[2] In the nine months ended September 30, 2022, the Company recorded write-downs of $0.5 million in Costs and Expenses Applicable to Technology Sales. The write-downs recorded during the nine months ended September 30, 2022 include $0.2 million related to excess and damaged inventory and $0.3 million recorded to reduce the carrying value of service parts held in Russia. In the nine months ended September 30, 2021, the Company recorded write-downs of $0.5 million in Costs and Expenses Applicable to Technology Sales to reduce the carrying value of excess inventory.

[3] In the nine months ended September 30, 2022, the Company recorded charges of $0.2 million (2021 — $0.3 million) in Costs and Expenses Applicable to Technology Rentals mostly related to an IMAX Theater System that was removed from its existing location, as well as the write-down of leased xenon-based digital systems which were taken out of service in connection with customer upgrades to laser-based digital systems.

[4] In the nine months ended September 30, 2022, the Company recorded impairment losses of $0.5 million (2021 — $nil) related to the write-down of DMR and documentary film assets.