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Segment Disclosures (Details Textual)	3 Months Ended
	Mar. 31, 2013 Segment
Segment Disclosures (Textual) [Abstract]
Number of business units of the company	4

X

- Details

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

X

- Definition

Number of segments reported by the entity. A reportable segment is a component of an entity for which there is an accounting requirement to report separate financial information on that component in the entity's financial statements.

+ References

No definition available.

+ Details

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