Condensed Consolidated Statements of Cash Flows Supplemental Information - Write-downs (Details) $ in Thousands, ¥ in Millions		3 Months Ended		6 Months Ended
		Jun. 30, 2022 USD ($)	Jun. 30, 2021 USD ($)	Jun. 30, 2022 USD ($)		Jun. 30, 2022 CNY (¥)	Jun. 30, 2021 USD ($)
Write-downs
Other assets				$ 4,500	[1]	¥ 30.0
Inventories		$ 300	$ 100	278	[2]		200	[2]
Equipment supporting joint revenue sharing arrangements	[3]			212			329
Other property, plant and equipment				6			(23)
Film assets	[4]			466			(44)
Write-downs				$ 5,432			$ 462

[1] In the six months ended June 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 16(e).)

[2] In the six months ended June 30, 2022, the Company recorded write-downs of $0.3 million in Costs and Expenses Applicable to Technology Sales principally to reduce the carrying value of service parts held in Russia. In the six months ended June 30, 2021, the Company recorded write-downs of $0.2 million in Costs and Expenses Applicable to Technology Sales to reduce the carrying value of excess inventory.

[3] In the six months ended June 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 a removed IMAX Theater System, 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 six months ended June 30, 2022, the Company recorded impairment losses of $0.5 million (2021 — $nil) related to the write-down of DMR and documentary film assets.