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Summary of Treasury Stock Activity (Detail) (USD $)
In Thousands, except Share data, unless otherwise specified
 3 Months Ended
Mar. 31, 2015
Schedule of Treasury Stock [Line Items]  
Beginning Balance, Shares 4,057,135us-gaap_TreasuryStockShares
Restricted stock withholdings 107,825cnk_RestrictedStockWithholdings [1]
Restricted stock forfeitures 11,737us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardForfeited
Ending Balance, Shares 4,176,697us-gaap_TreasuryStockShares
Beginning Balance, Cost $ 61,807us-gaap_TreasuryStockValue
Restricted stock withholdings 4,748cnk_CostOfSharesWithheldByCompanyToCoverTaxWithholdingsRelatedToRestrictedStockVesting [1]
Restricted stock forfeitures 0us-gaap_RestrictedStockAwardForfeitures
Ending Balance, Cost $ 66,555us-gaap_TreasuryStockValue
[1] The Company withheld restricted shares as a result of the election by certain employees to satisfy their tax liabilities upon vesting in restricted stock and restricted stock units. The Company determined the number of shares to be withheld based upon market values ranging from $41.21 to $44.67 per share.