XML 119 R105.htm IDEA: XBRL DOCUMENT
v3.3.1.900

Acquisitions (First quarter 2014) - Additional Information (Detail) | 12 Months Ended
--- | ---
Dec. 31, 2015 Employees
Centric Insurance Agency [Member] |
Business Acquisition, Contingent Consideration [Line Items] |
Acquired entity, name | Centric Insurance Agency
Lewis Birch & Richardo, LLC [Member] |
Business Acquisition, Contingent Consideration [Line Items] |
Acquired entity, name | Lewis Birch & Richardo, LLC
Clearview National Partners, L.L.C [Member] |
Business Acquisition, Contingent Consideration [Line Items] |
Acquired entity, name | Clearview National Partners, LLC
Clearview National Partners, L.L.C [Member] | Minimum [Member] |
Business Acquisition, Contingent Consideration [Line Items] |
Number of employees covered | 100

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_BusinessAcquisitionContingentConsiderationLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Name of the acquired entity. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=56956515&loc=d3e1392-128463 + Details
Name: | us-gaap_BusinessAcquisitionNameOfAcquiredEntity
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of employees eligible to participate in the defined contribution plan or plans described. + References No definition available. + Details
Name: | us-gaap_DefinedContributionPlanNumberOfEmployeesCovered
Namespace Prefix: | us-gaap_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_BusinessAcquisitionAxis=cbz_CentricInsuranceAgencyMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_BusinessAcquisitionAxis=cbz_LewisBirchAndRichardoLLCMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_BusinessAcquisitionAxis=cbz_ClearviewNationalPartnersLLCMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RangeAxis=us-gaap_MinimumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |