XML 50 R38.htm IDEA: XBRL DOCUMENT
v3.10.0.1

New Accounting Pronouncements - Additional Information (Detail) $ in Millions | 9 Months Ended
--- | ---
Sep. 30, 2018 USD ($) Business_Units | Sep. 30, 2017 USD ($)
New Accounting Pronouncements Or Change In Accounting Principle [Line Items] |  |
Number of business units inconsistent with revenue recognition | Business_Units | 2 |
Accounting Standards Update 2016-18 [Member] |  |
New Accounting Pronouncements Or Change In Accounting Principle [Line Items] |  |
New accounting pronouncements or adoption of new standard resulted a (decrease) increase in net cash provided by operating activities | $ (0.4) | $ 4.2
Accounting Standards Update 2016-02 [Member] |  |
New Accounting Pronouncements Or Change In Accounting Principle [Line Items] |  |
Future minimum cash commitments under operating leases | $ 200.0 |

X
- Definition New accounting pronouncement or adoption of new standard resulted a (decrease) increase in net cash provided by operating activities. + References No definition available. + Details
Name: | cbz_NewAccountingPronouncementsOrAdoptionOfNewStandardResultedDecreaseIncreaseInNetCashProvidedByOperatingActivities
Namespace Prefix: | cbz_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Number of business units inconsistent with revenue recognition. + References No definition available. + Details
Name: | cbz_NumberOfBusinessUnitsInconsistentWithRevenueRecognition
Namespace Prefix: | cbz_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Net amount of required minimum rental payments for leases having an initial or remaining non-cancelable letter-terms in excess of one year. + References No definition available. + Details
Name: | cbz_OperatingLeasesFutureMinimumPaymentsNetDue
Namespace Prefix: | cbz_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- 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
Name: | us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_AdjustmentsForNewAccountingPronouncementsAxis=us-gaap_AccountingStandardsUpdate201618Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_AdjustmentsForNewAccountingPronouncementsAxis=us-gaap_AccountingStandardsUpdate201602Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |