Recently Issued Accounting Pronouncements (Policies)	3 Months Ended
Mar. 31, 2016
Accounting Changes and Error Corrections [Abstract]
New Accounting Pronouncements, Policy [Policy Text Block]	Accounting Standards Adopted in 2016 In November 2015, FASB issued ASU 2015-17, “Income Taxes (Topic 740) – Balance Sheet Reclassification of Deferred Taxes” (“ASU 2015-17”). ASU 2015-17 requires that deferred tax assets and liabilities be classified as noncurrent on the balance sheet. The current requirement that deferred tax liabilities and assets of a tax-paying component of an entity be offset and presented as a single amount is not affected by the amendments in this update. During the quarter ended March 31, 2016, the Company early adopted ASU 2015-17 on a prospective basis. As such, prior periods were not retrospectively adjusted. If ASU 2015-17 were adopted retrospectively, the net impact on the Consolidated Balance Sheet at December 31, 2105 would have resulted in a $0.1 million non-current deferred tax liability. In August 2015, FASB issued ASU No. 2015-15, “Interest – Imputation of Interest (Subtopic 835-30) – Presentation and Subsequent Measurement of Debt Issuance Costs Associated with Line-of-Credit Arrangements” (“ASU 2015-15”). ASU 2015-15 addresses the presentation and subsequent measurement of debt issuance costs related to line-of-credit arrangements, which was not addressed in ASU 2015-03. The recognition and measurement guidance for debt issuance costs is not affected by ASU 2015-15. In April 2015, FASB issued ASU No. 2015-03, “Interest – Imputation of Interest (Subtopic 835-30) – Simplifying the Presentation of Debt Issuance Costs” (“ASU 2015-03”). ASU 2015-03 requires that all costs incurred to issue debt be presented in the balance sheet as a direct reduction in the carrying value of debt, consistent with debt discounts, instead of being presented in the balance sheet as a deferred charge (i.e., an asset). The recognition and measurement guidance for debt issuance costs is not affected by ASU 2015-03. During the quarter ended March 31, 2016, the Company retrospectively adopted ASU 2015-03 and ASU 2015-15, which resulted in a reclassification of $1.9 million of debt issuance costs related to our credit facility from “Other non-current assets” to “Bank debt” in the accompanying Consolidated Balance Sheets as of December 31, 2015. In February 2015, FASB issued ASU No. 2015-02, “Consolidation (Topic 810) – Amendments to the Consolidation Analysis” (“ASU 2015-02”) which changes the analysis that a reporting entity must perform to determine whether it should consolidate certain types of legal entities. The amendments in the standard affect limited partnerships and similar legal entities, evaluating fees paid to a decision maker or a service provider as a variable interest, the effect of fee arrangements on the primary beneficiary determination, the effect of related parties on the primary beneficiary determination, and certain investment funds. During the quarter ended March 31, 2016, the Company adopted the provisions of ASU 2015-02, which had no effect on the Company’s consolidated financial statements. Accounting Standards Not Yet Adopted In March 2016, FASB issued ASU No. 2016-09, “Compensation – Stock Compensation (Topic 718) – Improvements to Employee Share-Based Payment Accounting.” The objective of this amendment applies to several aspects of the accounting for share-based payment transactions, including the income tax consequences, classification of awards as either equity or liabilities, and classification on the statement of cash flows. The effective date of the amendment is for fiscal years beginning after December 31, 2016 and interim periods within that reporting period. CBIZ is currently evaluating the impact this standard may have on the financial statements. In February 2016, FASB issued ASU No. 2016-02, “Leases (Topic 842) – Amendments to the Financial Accounting Standards Board Accounting Standards Codification” (“ASU 2016-02”). Under ASU 2016-02, lessees will need to recognize a right-to-use asset and a lease liability for virtually all of their leases (other than leases that meet the definition of a short-term lease). For income statements purposes, a dual model was retained, requiring leases to be classified as either operating or finance. Operating leases will result in straight-line expense (similar to current operating leases) while finance leases will result in a front-loaded expense pattern (similar to current capital leases). ASU 2016-02 is effective for fiscal years beginning after December 15, 2018, and interim periods within those fiscal years. Early adoption is permitted. The Company is currently evaluating the impact the adoption of this ASU will have on its consolidated financial statements, whhc we expect will be material. In August, FASB issued ASU No. 2015-14, “Revenue from Contracts with Customers (Topic 606) – Deferral of the Effective Date” (“ASU 2015-14”). ASU 2015-14 defers the effective date of ASU No. 2014-09, “Revenue from Contracts with Customers (Topic 606)” which was issued in May 2014 and requires an entity to recognize revenue to depict the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services, by one year for all entities. It will be effective for annual periods beginning after December 15, 2017 for public companies. Early adoption is permitted but not before annual periods beginning after December 15, 2016. Entities have the option of using either a full retrospective or modified approach to adopt ASU 2015-14. The Company is currently evaluating the new guidance and has not determined the impact this standard may have on its financial statements nor decided upon the method of adoption.

Accounting Standards Adopted in 2016

In November 2015, FASB issued ASU 2015-17, “Income Taxes (Topic 740) – Balance Sheet Reclassification of Deferred Taxes” (“ASU 2015-17”). ASU 2015-17 requires that deferred tax assets and liabilities be classified as noncurrent on the balance sheet. The current requirement that deferred tax liabilities and assets of a tax-paying component of an entity be offset and presented as a single amount is not affected by the amendments in this update. During the quarter ended March 31, 2016, the Company early adopted ASU 2015-17 on a prospective basis. As such, prior periods were not retrospectively adjusted. If ASU 2015-17 were adopted retrospectively, the net impact on the Consolidated Balance Sheet at December 31, 2105 would have resulted in a $0.1 million non-current deferred tax liability.

In August 2015, FASB issued ASU No. 2015-15, “Interest – Imputation of Interest (Subtopic 835-30) – Presentation and Subsequent Measurement of Debt Issuance Costs Associated with Line-of-Credit Arrangements” (“ASU 2015-15”). ASU 2015-15 addresses the presentation and subsequent measurement of debt issuance costs related to line-of-credit arrangements, which was not addressed in ASU 2015-03. The recognition and measurement guidance for debt issuance costs is not affected by ASU 2015-15.

In April 2015, FASB issued ASU No. 2015-03, “Interest – Imputation of Interest (Subtopic 835-30) – Simplifying the Presentation of Debt Issuance Costs” (“ASU 2015-03”). ASU 2015-03 requires that all costs incurred to issue debt be presented in the balance sheet as a direct reduction in the carrying value of debt, consistent with debt discounts, instead of being presented in the balance sheet as a deferred charge (i.e., an asset). The recognition and measurement guidance for debt issuance costs is not affected by ASU 2015-03. During the quarter ended March 31, 2016, the Company retrospectively adopted ASU 2015-03 and ASU 2015-15, which resulted in a reclassification of $1.9 million of debt issuance costs related to our credit facility from “Other non-current assets” to “Bank debt” in the accompanying Consolidated Balance Sheets as of December 31, 2015.

In February 2015, FASB issued ASU No. 2015-02, “Consolidation (Topic 810) – Amendments to the Consolidation Analysis” (“ASU 2015-02”) which changes the analysis that a reporting entity must perform to determine whether it should consolidate certain types of legal entities. The amendments in the standard affect limited partnerships and similar legal entities, evaluating fees paid to a decision maker or a service provider as a variable interest, the effect of fee arrangements on the primary beneficiary determination, the effect of related parties on the primary beneficiary determination, and certain investment funds. During the quarter ended March 31, 2016, the Company adopted the provisions of ASU 2015-02, which had no effect on the Company’s consolidated financial statements.

Accounting Standards Not Yet Adopted

In March 2016, FASB issued ASU No. 2016-09, “Compensation – Stock Compensation (Topic 718) – Improvements to Employee Share-Based Payment Accounting.” The objective of this amendment applies to several aspects of the accounting for share-based payment transactions, including the income tax consequences, classification of awards as either equity or liabilities, and classification on the statement of cash flows. The effective date of the amendment is for fiscal years beginning after December 31, 2016 and interim periods within that reporting period. CBIZ is currently evaluating the impact this standard may have on the financial statements.

In February 2016, FASB issued ASU No. 2016-02, “Leases (Topic 842) – Amendments to the Financial Accounting Standards Board Accounting Standards Codification” (“ASU 2016-02”). Under ASU 2016-02, lessees will need to recognize a right-to-use asset and a lease liability for virtually all of their leases (other than leases that meet the definition of a short-term lease). For income statements purposes, a dual model was retained, requiring leases to be classified as either operating or finance. Operating leases will result in straight-line expense (similar to current operating leases) while finance leases will result in a front-loaded expense pattern (similar to current capital leases). ASU 2016-02 is effective for fiscal years beginning after December 15, 2018, and interim periods within those fiscal years. Early adoption is permitted. The Company is currently evaluating the impact the adoption of this ASU will have on its consolidated financial statements, whhc we expect will be material.

In August, FASB issued ASU No. 2015-14, “Revenue from Contracts with Customers (Topic 606) – Deferral of the Effective Date” (“ASU 2015-14”). ASU 2015-14 defers the effective date of ASU No. 2014-09, “Revenue from Contracts with Customers (Topic 606)” which was issued in May 2014 and requires an entity to recognize revenue to depict the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services, by one year for all entities. It will be effective for annual periods beginning after December 15, 2017 for public companies. Early adoption is permitted but not before annual periods beginning after December 15, 2016. Entities have the option of using either a full retrospective or modified approach to adopt ASU 2015-14. The Company is currently evaluating the new guidance and has not determined the impact this standard may have on its financial statements nor decided upon the method of adoption.