XML 54 R43.htm IDEA: XBRL DOCUMENT
v3.10.0.1

Revenue - Additional Information (Detail) | 6 Months Ended
--- | ---
Jun. 30, 2018
Revenue Recognition And Deferred Revenue [Abstract] |
Capitalized contract period | one year or less
Performance obligations period | one year or less

X
- Definition Capitalized contract period. + References No definition available. + Details
Name: | cbz_CapitalizedContractPeriod
Namespace Prefix: | cbz_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Performance obligations period. + References No definition available. + Details
Name: | cbz_PerformanceObligationsPeriod
Namespace Prefix: | cbz_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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