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Investment in Marketable Securities - RealD (Details) (USD $) In Thousands, except Share data, unless otherwise specified | 6 Months Ended |
--- | --- | ---
Jun. 30, 2012 | Dec. 31, 2011
Investment in Marketable Securities - RealD (Textual) [Abstract] |  |
Number of options to purchase common stock | 1,222,780 |
Exercise price of options, shares | $ 0.00667 |
Number of shares owned in RealD | 1,222,780 |
Estimated fair value of Company owned shares in RealD | $ 18,293 | $ 9,709
Unrealized holding gain | $ 8,584 |

X
- Definition Aggregate exercise price of options to purchase common shares of real D. + References No definition available. + Details
Name: | cnk_ExercisePriceOfVestedOptionsToPurchaseCommonStockOfCompanyThree
Namespace Prefix: | cnk_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | duration

X
- Definition This item represents the fair value of the entity's investment in real d which is in the form of equity securities. The entity has classified these equity securities as available for sale. + References No definition available. + Details
Name: | cnk_InvestmentInCompanyThree
Namespace Prefix: | cnk_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Details
Name: | cnk_InvestmentInCompanyThreeTextualAbstract
Namespace Prefix: | cnk_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of shares owned in real d. + References No definition available. + Details
Name: | cnk_NumberOfSharesOwnedInCompanyThree
Namespace Prefix: | cnk_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Definition Number of options to purchase common shares of RealD in which the company has vested. + References No definition available. + Details
Name: | cnk_NumberOfVestedOptionsToPurchaseCommonStockOfCompanyThree
Namespace Prefix: | cnk_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition This item represents the gross unrealized losses for securities, at a point in time, which are categorized neither as held-to-maturity nor trading securities. + References No definition available. + Details
Name: | us-gaap_AvailableForSaleSecuritiesGrossUnrealizedLosses1
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant