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Consolidation and Integration Reserve - Summary of Consolidation and Integration Reserve (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Collaboration Arrangement Disclosure [Abstract]
Consolidation and Integration Reserve, Beginning Balance	$ 1,264	$ 1,731
Adjustments against income	642	750	800
Payments	(895)	(1,217)
Consolidation and Integration Reserve, Ending Balance	$ 1,011	$ 1,264	$ 1,731

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- Details

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- Definition

Consolidation and integration reserve.

+ References

No definition available.

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

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- Definition

Consolidation and integration reserve adjustments that were recorded to operating expenses during the current period.

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No definition available.

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
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- Definition

Consolidation and integration reserve payments that were made during the current period.

+ References

No definition available.

+ Details

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Namespace Prefix:	cbz_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration