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Fair Value Measurements - Additional Information (Detail) (USD $)	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Fair Value Measurements, Inter-transfers between Levels	$ 0cbz_FairValueMeasurementsInterTransfersBetweenLevels	$ 0cbz_FairValueMeasurementsInterTransfersBetweenLevels
Minimum [Member]
Business Combination Contingent Consideration Liability Extended Term	3 years
Maximum [Member]
Business Combination Contingent Consideration Liability Extended Term	6 years

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+ References

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- Definition

Fair value measurements inter transfers between levels.

+ References

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