Summary of Activity with NCM Included in Company's Consolidated Financial Statements (Parenthetical) (Detail) $ in Thousands	6 Months Ended
Jun. 30, 2021 USD ($)
Equity Method Investments And Joint Ventures [Abstract]
Company's beverage concessionaire advertising costs	$ 1,399

Cost of on-screen advertising time provided to beverage concessionaire.

No definition available.

Name:	cnk_CostOfOnScreenTimeProvidedToBeverageConcessionaire
Namespace Prefix:	cnk_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration