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Stock-Based Compensation (Additional Information Related To Stock Options) (Details) - USD ($) $ in Thousands | Dec. 31, 2021 | Dec. 31, 2019
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Stock Options [Member] |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Intrinsic value of share-based awards exercised | $ 451 | $ 270

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- Definition Intrinsic value of share-based awards exercised + References No definition available. + Details
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Namespace Prefix: | cnty_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Details
Name: | us-gaap_AwardTypeAxis=us-gaap_EmployeeStockOptionMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |