XML 97 R69.htm IDEA: XBRL DOCUMENT v3.3.0.814

Acquisitions (Third quarter 2015) - Additional Information (Detail) - Acquisition of Client Lists [Member] $ in Millions	3 Months Ended
	Sep. 30, 2015 USD ($) Business Client_List	Jun. 30, 2015 USD ($) Business Client_List	Mar. 31, 2015 USD ($) Client_List
Business Acquisition, Contingent Consideration [Line Items]
Consideration paid in cash	$ 0.2	$ 3.0	$ 0.1
Guaranteed future consideration	$ 0.5		$ 0.3
Number of businesses acquired | Business	0	0
Employee Services [Member]
Business Acquisition, Contingent Consideration [Line Items]
Number of client list purchased | Client_List	2,000,000	1	2

X

- Definition

Business acquisition cost of acquired entity contingent consideration.

+ References

No definition available.

+ Details

Name:	cbz_BusinessAcquisitionCostOfAcquiredEntityGuaranteedFutureConsideration
Namespace Prefix:	cbz_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

Client list purchased.

+ References

No definition available.

+ Details

Name:	cbz_ClientListPurchased
Namespace Prefix:	cbz_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

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

The number of businesses acquired by the entity during the period.

+ References

No definition available.

+ Details

Name:	us-gaap_NumberOfBusinessesAcquired
Namespace Prefix:	us-gaap_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

X

- Definition

The cash outflow associated with the acquisition of business during the period. The cash portion only of the acquisition price.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef



-Publisher FASB



-Name Accounting Standards Codification



-Glossary Investing Activities



-URI http://asc.fasb.org/extlink&oid=6516133



Reference 2: http://www.xbrl.org/2003/role/presentationRef



-Publisher FASB



-Name Accounting Standards Codification



-Topic 230



-SubTopic 10



-Section 45



-Paragraph 13



-Subparagraph (b)



-URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3213-108585

+ Details

Name:	us-gaap_PaymentsToAcquireBusinessesGross
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Details

Name:	us-gaap_BusinessAcquisitionAxis=cbz_AcquisitionOfClientListsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis=cbz_EmployeeServicesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: