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Subsequent Event	3 Months Ended
	Mar. 31, 2013
Subsequent Event [Abstract]
Subsequent event	15. Subsequent Event Effective May 1, 2013, CBIZ acquired Associated Insurance Agents (“AIA”) of Minneapolis, Minnesota. AIA specializes in property and casualty insurance, personal lines, and health and benefit insurance for clients primarily located in Minnesota, Wisconsin and Nebraska. Annual revenues are expected to be $3.8 million and will be reported in the Employee Services practice group.

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The entire disclosure for significant events or transactions that occurred after the balance sheet date through the date the financial statements were issued or the date the financial statements were available to be issued. Examples include: the sale of a capital stock issue, purchase of a business, settlement of litigation, catastrophic loss, significant foreign exchange rate changes, loans to insiders or affiliates, and transactions not in the ordinary course of business.

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