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Summary of Potential Number of Shares Vesting under Restricted Stock Unit Awards (Detail) (USD $)
In Thousands, except Share data, unless otherwise specified
 12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Schedule of Restricted Stock Unit [Line Items]      
Number of units at IRR level of at least 8.5% 65,832cnk_NumberOfSharesVestingAtIrrTargetLevelOfAtLeastEightPointFivePercent 38,366cnk_NumberOfSharesVestingAtIrrTargetLevelOfAtLeastEightPointFivePercent 50,981cnk_NumberOfSharesVestingAtIrrTargetLevelOfAtLeastEightPointFivePercent
Number of units at IRR level of at least 10.5% 131,683cnk_NumberOfSharesVestingAtIrrTargetLevelOfAtLeastTenPointFivePercent 76,741cnk_NumberOfSharesVestingAtIrrTargetLevelOfAtLeastTenPointFivePercent 101,974cnk_NumberOfSharesVestingAtIrrTargetLevelOfAtLeastTenPointFivePercent
Number of units at IRR level of at least 12.5% 197,515cnk_NumberOfSharesVestingAtIrrTargetLevelOfAtLeastTwelvePointFivePercent 115,107cnk_NumberOfSharesVestingAtIrrTargetLevelOfAtLeastTwelvePointFivePercent 152,955cnk_NumberOfSharesVestingAtIrrTargetLevelOfAtLeastTwelvePointFivePercent
Fair value of units at IRR level of at least 8.5% $ 1,879cnk_ValueOfSharesVestingAtIrrTargetLevelOfAtLeastEightPointFivePercent $ 1,129cnk_ValueOfSharesVestingAtIrrTargetLevelOfAtLeastEightPointFivePercent $ 1,103cnk_ValueOfSharesVestingAtIrrTargetLevelOfAtLeastEightPointFivePercent
Fair value of units at IRR level of at least 10.5% 3,758cnk_ValueOfSharesVestingAtIrrTargetLevelOfAtLeastTenPointFivePercent 2,259cnk_ValueOfSharesVestingAtIrrTargetLevelOfAtLeastTenPointFivePercent 2,206cnk_ValueOfSharesVestingAtIrrTargetLevelOfAtLeastTenPointFivePercent
Fair value of units at IRR level of at least 12.5% $ 5,637cnk_ValueOfSharesVestingAtIrrTargetLevelOfAtLeastTwelvePointFivePercent $ 3,389cnk_ValueOfSharesVestingAtIrrTargetLevelOfAtLeastTwelvePointFivePercent $ 3,308cnk_ValueOfSharesVestingAtIrrTargetLevelOfAtLeastTwelvePointFivePercent