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Summary of Activity with NCM Included in Company's Consolidated Financial Statements (Parenthetical) (Detail) $ in Thousands | 3 Months Ended
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Mar. 31, 2021 USD ($)
Equity Method Investments And Joint Ventures [Abstract] |
Company's beverage concessionaire advertising costs | $ 370

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- Definition Cost of on-screen advertising time provided to beverage concessionaire. + References No definition available. + Details
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Namespace Prefix: | cnk_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- References No definition available. + Details
Name: | us-gaap_EquityMethodInvestmentsAndJointVenturesAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration