XML 62 R46.htm IDEA: XBRL DOCUMENT
v3.20.1

Fair Value Measurements - Additional Information (Detail) - USD ($) | 3 Months Ended
--- | ---
Mar. 31, 2020 | Mar. 31, 2019
Fair Value Disclosures [Abstract] |  |
Fair Value Measurements, Inter-transfers between Levels | $ 0 | $ 0

X
- Definition Fair value measurements inter transfers between levels. + References No definition available. + Details
Name: | cbz_FairValueMeasurementsInterTransfersBetweenLevels
Namespace Prefix: | cbz_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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