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Intangible Assets-Net (Parenthetical) (Detail) | Dec. 31, 2020 Theatre
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Intangible Assets Net Excluding Goodwill [Abstract] |
Number of theatres acquired | 2

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- Definition Number of theatres acquired. + References No definition available. + Details
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Namespace Prefix: | cnk_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

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