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v2.4.1.9

Goodwill and Other Intangible Assets, Net - Additional Information (Detail) (USD $) | 12 Months Ended
--- | ---
Dec. 31, 2014 | Dec. 31, 2013
Finite-Lived Intangible Assets [Line Items] |  |
Additions to goodwill | $ 51,900,000 cbz_BusinessAcquisitionAdditionsToGoodwillAmount | $ 9,300,000 cbz_BusinessAcquisitionAdditionsToGoodwillAmount
Decrease to goodwill resulting from business divestiture | 1,537,000 us-gaap_GoodwillWrittenOffRelatedToSaleOfBusinessUnit |
Finite-Lived Intangible Asset, Useful Life | 8 years 4 months 24 days |
Minimum [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Finite-Lived Intangible Asset, Useful Life | 2 years |
Maximum [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Finite-Lived Intangible Asset, Useful Life | 15 years |
Client Lists [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Remaining weighted average amortization period remaining for total intangible assets | 8 years 2 months 12 days |
Other Intangible Assets [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Finite-Lived Intangible Asset, Useful Life | 11 years 3 months 18 days |
Other Intangible Assets [Member] | Minimum [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Finite-Lived Intangible Asset, Useful Life | 2 years |
Other Intangible Assets [Member] | Maximum [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Finite-Lived Intangible Asset, Useful Life | 15 years |
Financial Services [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Additions to goodwill | 9,300,000 cbz_BusinessAcquisitionAdditionsToGoodwillAmount / us-gaap_StatementBusinessSegmentsAxis = cbz_FinancialServicesMember | 1,400,000 cbz_BusinessAcquisitionAdditionsToGoodwillAmount / us-gaap_StatementBusinessSegmentsAxis = cbz_FinancialServicesMember
Number of business divested | 1 cbz_BusinessDivestedNumber / us-gaap_StatementBusinessSegmentsAxis = cbz_FinancialServicesMember | 0 cbz_BusinessDivestedNumber / us-gaap_StatementBusinessSegmentsAxis = cbz_FinancialServicesMember
Decrease to goodwill resulting from business divestiture | 1,537,000 us-gaap_GoodwillWrittenOffRelatedToSaleOfBusinessUnit / us-gaap_StatementBusinessSegmentsAxis = cbz_FinancialServicesMember |
Employee Services [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Additions to goodwill | $ 42,600,000 cbz_BusinessAcquisitionAdditionsToGoodwillAmount / us-gaap_StatementBusinessSegmentsAxis = cbz_EmployeeServicesMember | $ 7,900,000 cbz_BusinessAcquisitionAdditionsToGoodwillAmount / us-gaap_StatementBusinessSegmentsAxis = cbz_EmployeeServicesMember

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- Definition Business acquisition additions to goodwill amount. + References No definition available. + Details
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Balance Type: | debit
Period Type: | duration

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- Definition Business divested number. + References No definition available. + Details
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Balance Type: | na
Period Type: | duration

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- Definition Weighted average period before the next renewal or extension for intangible assets with renewal or extension terms, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
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- Details
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- Definition Useful life of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
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Balance Type: | na
Period Type: | duration

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- Definition Amount of divestiture of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267 + Details
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- Details
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- Details
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Period Type: |