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Dividends (Parenthetical) (Detail) - USD ($) $ / shares in Units, $ in Thousands | 12 Months Ended
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Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Supplemental Cash Flow Elements [Abstract] |  |  |
Effective Date of change in amount of quarterly dividend | Feb. 23, 2018 | Feb. 23, 2017 | Feb. 24, 2016
Revised quarterly dividend | $ 0.32 | $ 0.29 | $ 0.27
Dividends related to outstanding restricted stock units | $ 624 | $ 558 | $ 554

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- Definition Amount of dividends accrued on unvested restricted stock units to be paid upon vesting. + References No definition available. + Details
Name: | cnk_DividendsAccruedOnUnvestedRestrictedStockUnits
Namespace Prefix: | cnk_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition The date on which the company's board of directors raised its quarterly dividend. + References No definition available. + Details
Name: | cnk_EffectiveDateOfChangeInAmountOfQuarterlyDividend
Namespace Prefix: | cnk_
Data Type: | xbrli:dateItemType
Balance Type: | na
Period Type: | duration

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- Definition Amount of revised quarterly dividend per common share. + References No definition available. + Details
Name: | cnk_RevisedQuarterlyDividend
Namespace Prefix: | cnk_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | duration

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