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Treasury Stock and Share-Based Awards - Summary of Treasury Stock Activity (Parenthetical) (Detail) | 9 Months Ended
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Sep. 30, 2025 $ / shares
Schedule of Treasury Stock [Line Items] |
Common stock repurchased value as result of restricted stock forfeitures | $ 0.001
Minimum |
Schedule of Treasury Stock [Line Items] |
Market Value of Restricted Shares | 24.38
Maximum |
Schedule of Treasury Stock [Line Items] |
Market Value of Restricted Shares | $ 33.06

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- Definition Common stock repurchased value as result of restricted stock Forfeitures + References No definition available. + Details
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Balance Type: | na
Period Type: | duration

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- Definition Market value per share of restricted shares withheld by company related to restricted stock vesting + References No definition available. + Details
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Data Type: | dtr-types:perShareItemType
Balance Type: | na
Period Type: | duration

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- Definition Schedule of Treasury Stock [Line Items] + References No definition available. + Details
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Namespace Prefix: | cnk_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Details
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Data Type: | na
Balance Type: |
Period Type: |

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- Details
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Balance Type: |
Period Type: |