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Transactions with DCIP (Parenthetical) (Detail) $ in Thousands | 12 Months Ended
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Dec. 31, 2020 USD ($)
Equity Method Investments And Joint Ventures [Abstract] |
Lease termination payments | $ 695

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- Definition Lease Termination Payment. + References No definition available. + Details
Name: | cnk_LeaseTerminationPayment
Namespace Prefix: | cnk_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
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