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Impairment of Long-Lived Assets - Additional Information (Detail) | 6 Months Ended
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Jun. 30, 2020
Impairment Or Disposal Of Tangible Assets Disclosure [Abstract] |
Multiple of cash flows used to estimate fair value of long-lived asset | 6

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- Definition Represents cash flow multiple used to estimate fair value of long-lived assets evaluated for impairment during reporting period. + References No definition available. + Details
Name: | cnk_FairValueInputsCashFlowsMultiple
Namespace Prefix: | cnk_
Data Type: | xbrli:pureItemType
Balance Type: | na
Period Type: | duration

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