Related Parties	12 Months Ended
Dec. 31, 2017
Related Party Transactions [Abstract]
Related Parties	Note 17. Related Parties The following is a summary of certain agreements and transactions between or among us and certain related parties. Management reviews these transactions as they occur and monitors them for compliance with our Code of Conduct, internal procedures and applicable legal requirements. The Audit Committee reviews and ratifies such transactions annually, or as they are more frequently brought to the attention of the Audit Committee by our Director of Internal Audit, General Counsel or other members of Management. A number of the businesses acquired by us are located in properties owned indirectly by and leased from persons employed by us, none of whom are members of our senior management. In the aggregate, we paid approximately $3.3 million, $3.2 million and $2.7 million during the years ended December 31, 2017, 2016 and 2015, respectively, under such leases. Rick L. Burdick, a lead director of CBIZ, is a partner of Akin Gump Strauss Hauer & Feld LLP (“Akin Gump”). Akin Gump performed legal work for us during the years ended December 31, 2017, 2016 and 2015 for which we paid approximately $0.2 million, $0.1 million and $0.2 million, respectively. We maintain joint-referral relationships and administrative service agreements with independent licensed CPA firms under which we provide administrative services in exchange for a fee. Fees earned by us under the ASAs are recorded as “Revenue” (at net realizable value) in the accompanying Consolidated Statements of Comprehensive Income and were approximately $156.4 million in 2017, $144.8 million in 2016 and $137.5 million in 2015. These firms are owned by licensed CPAs who are employed by our subsidiaries and provide audit and attest services to clients including our clients. The CPA firms with which we maintain administrative service agreements operate as limited liability companies, limited liability partnerships or professional corporations. The firms are separate legal entities with separate governing bodies and officers. We have no ownership interest in any of these CPA firms, and neither the existence of the administrative service agreements nor the providing of services thereunder is intended to constitute control of the CPA firms by us. CBIZ and the CPA firms maintain their own respective liability and risk of loss in connection with performance of each of its respective services, and we do not believe that our arrangements with these CPA firms result in additional risk of loss.

Note 17. Related Parties

The following is a summary of certain agreements and transactions between or among us and certain related parties. Management reviews these transactions as they occur and monitors them for compliance with our Code of Conduct, internal procedures and applicable legal requirements. The Audit Committee reviews and ratifies such transactions annually, or as they are more frequently brought to the attention of the Audit Committee by our Director of Internal Audit, General Counsel or other members of Management.

A number of the businesses acquired by us are located in properties owned indirectly by and leased from persons employed by us, none of whom are members of our senior management. In the aggregate, we paid approximately $3.3 million, $3.2 million and $2.7 million during the years ended December 31, 2017, 2016 and 2015, respectively, under such leases.

Rick L. Burdick, a lead director of CBIZ, is a partner of Akin Gump Strauss Hauer & Feld LLP (“Akin Gump”). Akin Gump performed legal work for us during the years ended December 31, 2017, 2016 and 2015 for which we paid approximately $0.2 million, $0.1 million and $0.2 million, respectively.

We maintain joint-referral relationships and administrative service agreements with independent licensed CPA firms under which we provide administrative services in exchange for a fee. Fees earned by us under the ASAs are recorded as “Revenue” (at net realizable value) in the accompanying Consolidated Statements of Comprehensive Income and were approximately $156.4 million in 2017, $144.8 million in 2016 and $137.5 million in 2015. These firms are owned by licensed CPAs who are employed by our subsidiaries and provide audit and attest services to clients including our clients. The CPA firms with which we maintain administrative service agreements operate as limited liability companies, limited liability partnerships or professional corporations. The firms are separate legal entities with separate governing bodies and officers. We have no ownership interest in any of these CPA firms, and neither the existence of the administrative service agreements nor the providing of services thereunder is intended to constitute control of the CPA firms by us. CBIZ and the CPA firms maintain their own respective liability and risk of loss in connection with performance of each of its respective services, and we do not believe that our arrangements with these CPA firms result in additional risk of loss.