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Organization and Summary of Significant Accounting Policies Summary of Estimated Useful Lives Property and Equipment (Detail) | 12 Months Ended
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Dec. 31, 2013
Summary Of Significant Accounting Policies [Line Items] |
Property and equipment useful life | 7 years
Minimum [Member] | Buildings [Member] |
Summary Of Significant Accounting Policies [Line Items] |
Property and equipment useful life | 25 years
Minimum [Member] | Furniture and fixtures [Member] |
Summary Of Significant Accounting Policies [Line Items] |
Property and equipment useful life | 5 years
Minimum [Member] | Capitalized software [Member] |
Summary Of Significant Accounting Policies [Line Items] |
Property and equipment useful life | 2 years
Minimum [Member] | Equipment [Member] |
Summary Of Significant Accounting Policies [Line Items] |
Property and equipment useful life | 3 years
Maximum [Member] | Buildings [Member] |
Summary Of Significant Accounting Policies [Line Items] |
Property and equipment useful life | 40 years
Maximum [Member] | Furniture and fixtures [Member] |
Summary Of Significant Accounting Policies [Line Items] |
Property and equipment useful life | 10 years
Maximum [Member] | Capitalized software [Member] |
Summary Of Significant Accounting Policies [Line Items] |
Property and equipment useful life | 7 years
Maximum [Member] | Equipment [Member] |
Summary Of Significant Accounting Policies [Line Items] |
Property and equipment useful life | 7 years

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- Details
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Namespace Prefix: | cbz_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Useful life of long lived, physical assets used in the normal conduct of business and not intended for resale, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Examples include, but not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration