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Commitments and Contingencies - Acquisitions (Details) | 12 Months Ended
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Dec. 31, 2023
Commitments and Contingencies Disclosure [Abstract] |
Period of time shares are contractually restricted from sale (up to) | 1 year

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- Definition Business Acquisition, Equity Interest Issued Or Issuable, Period Contractually Restricted From Sale + References No definition available. + Details
Name: | cbz_BusinessAcquisitionEquityInterestIssuedOrIssuablePeriodContractuallyRestrictedFromSale
Namespace Prefix: | cbz_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

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- References No definition available. + Details
Name: | us-gaap_CommitmentsAndContingenciesDisclosureAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration