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Subsequent Event (Details Textual) (USD $) In Millions, unless otherwise specified | 13 Months Ended
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May 01, 2013
Subsequent Event (Textual) [Abstract] |
Expected annual revenue of an acquired entity | $ 3.8

X
- Details
Name: | cbz_SubsequentEventsTextualAbstract
Namespace Prefix: | cbz_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Total revenue reported by the acquired entity for its previous full fiscal year before the business acquisition. + References No definition available. + Details
Name: | us-gaap_BusinessAcquisitionRevenueReportedByAcquiredEntityForLastAnnualPeriod
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration