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Impairment of Long-Lived Assets - Additional Information (Detail)	6 Months Ended
	Jun. 30, 2020
Impairment Or Disposal Of Tangible Assets Disclosure [Abstract]
Multiple of cash flows used to estimate fair value of long-lived asset	6

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- Definition

Represents cash flow multiple used to estimate fair value of long-lived assets evaluated for impairment during reporting period.

+ References

No definition available.

+ Details

Name:	cnk_FairValueInputsCashFlowsMultiple
Namespace Prefix:	cnk_
Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	duration

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- References

No definition available.

+ Details

Name:	us-gaap_ImpairmentOrDisposalOfTangibleAssetsDisclosureAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration