XML 53 R42.htm IDEA: XBRL DOCUMENT
v3.21.1

The Company and Basis of Presentation - Additional Information (Detail) | Mar. 31, 2021
--- | ---
Minimum |
Organization Consolidation And Presentation Of Financial Statements [Line Items] |
Equity method investment, ownership percentage | 20.00%
Maximum |
Organization Consolidation And Presentation Of Financial Statements [Line Items] |
Equity method investment, ownership percentage | 50.00%
Cost method investment, ownership Percentage | 20.00%

X
- Definition Cost method investment ownership percentage. + References No definition available. + Details
Name: | cnk_CostMethodInvestmentOwnershipPercentage
Namespace Prefix: | cnk_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Organization consolidation and presentation of financial statements. + References No definition available. + Details
Name: | cnk_OrganizationConsolidationAndPresentationOfFinancialStatementsLineItems
Namespace Prefix: | cnk_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 323 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=114001798&loc=d3e33918-111571 + Details
Name: | us-gaap_EquityMethodInvestmentOwnershipPercentage
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Details
Name: | srt_RangeAxis=srt_MinimumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RangeAxis=srt_MaximumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |